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 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);
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: # ----------------------------------------------------------- Check out an item
669:
670: sub checkout {
671: my ($symb,$tuname,$tudom,$tcrsid)=@_;
672: my $now=time;
673: my $lonhost=$perlvar{'lonHostID'};
674: my $infostr=&escape(
675: $tuname.'&'.
676: $tudom.'&'.
677: $tcrsid.'&'.
678: $symb.'&'.
679: $now.'&'.$ENV{'REMOTE_ADDR'});
680: my $token=&reply('tmpput:'.$infostr,$lonhost);
681: if ($token=~/^error\:/) {
682: &logthis("<font color=blue>WARNING: ".
683: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
684: "</font>");
685: return '';
686: }
687:
688: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
689: $token=~tr/a-z/A-Z/;
690:
691: my %infohash=('resource.0.outtoken' => $token,
692: 'resource.0.checkouttime' => $now,
693: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
694:
695: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
696: return '';
697: } else {
698: &logthis("<font color=blue>WARNING: ".
699: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
700: "</font>");
701: }
702:
703: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
704: &escape('Checkout '.$infostr.' - '.
705: $token)) ne 'ok') {
706: return '';
707: } else {
708: &logthis("<font color=blue>WARNING: ".
709: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
710: "</font>");
711: }
712: return $token;
713: }
714:
715: # ------------------------------------------------------------ Check in an item
716:
717: sub checkin {
718: my $token=shift;
719: my $now=time;
720: my ($ta,$tb,$lonhost)=split(/\*/,$token);
721: $lonhost=~tr/A-Z/a-z/;
722: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
723: $dtoken=~s/\W/\_/g;
724: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
725: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
726:
727: unless (($tuname) && ($tudom)) {
728: &logthis('Check in '.$token.' ('.$dtoken.') failed');
729: return '';
730: }
731:
732: unless (&allowed('mgr',$tcrsid)) {
733: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
734: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
735: return '';
736: }
737:
738: my %infohash=('resource.0.intoken' => $token,
739: 'resource.0.checkintime' => $now,
740: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
741:
742: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
743: return '';
744: }
745:
746: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
747: &escape('Checkin - '.$token)) ne 'ok') {
748: return '';
749: }
750:
751: return ($symb,$tuname,$tudom,$tcrsid);
752: }
753:
754: # --------------------------------------------- Set Expire Date for Spreadsheet
755:
756: sub expirespread {
757: my ($uname,$udom,$stype,$usymb)=@_;
758: my $cid=$ENV{'request.course.id'};
759: if ($cid) {
760: my $now=time;
761: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
762: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
763: $ENV{'course.'.$cid.'.num'}.
764: ':nohist_expirationdates:'.
765: &escape($key).'='.$now,
766: $ENV{'course.'.$cid.'.home'})
767: }
768: return 'ok';
769: }
770:
771: # ----------------------------------------------------- Devalidate Spreadsheets
772:
773: sub devalidate {
774: my $symb=shift;
775: my $cid=$ENV{'request.course.id'};
776: if ($cid) {
777: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
778: my $status=
779: &del('nohist_calculatedsheet',
780: [$key.'studentcalc'],
781: $ENV{'course.'.$cid.'.domain'},
782: $ENV{'course.'.$cid.'.num'})
783: .' '.
784: &del('nohist_calculatedsheets_'.$cid,
785: [$key.'assesscalc:'.$symb]);
786: unless ($status eq 'ok ok') {
787: &logthis('Could not devalidate spreadsheet '.
788: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
789: $symb.': '.$status);
790: }
791: }
792: }
793:
794: # ----------------------------------------------------------------------- Store
795:
796: sub store {
797: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
798: my $home='';
799:
800: if ($stuname) {
801: $home=&homeserver($stuname,$domain);
802: }
803:
804: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
805:
806: &devalidate($symb);
807:
808: $symb=escape($symb);
809: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
810: if (!$domain) { $domain=$ENV{'user.domain'}; }
811: if (!$stuname) { $stuname=$ENV{'user.name'}; }
812: if (!$home) { $home=$ENV{'user.home'}; }
813: my $namevalue='';
814: map {
815: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
816: } keys %$storehash;
817: $namevalue=~s/\&$//;
818: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
819: }
820:
821: # -------------------------------------------------------------- Critical Store
822:
823: sub cstore {
824: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
825: my $home='';
826:
827: if ($stuname) {
828: $home=&homeserver($stuname,$domain);
829: }
830:
831: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
832:
833: &devalidate($symb);
834:
835: $symb=escape($symb);
836: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
837: if (!$domain) { $domain=$ENV{'user.domain'}; }
838: if (!$stuname) { $stuname=$ENV{'user.name'}; }
839: if (!$home) { $home=$ENV{'user.home'}; }
840:
841: my $namevalue='';
842: map {
843: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
844: } keys %$storehash;
845: $namevalue=~s/\&$//;
846: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
847: }
848:
849: # --------------------------------------------------------------------- Restore
850:
851: sub restore {
852: my ($symb,$namespace,$domain,$stuname) = @_;
853: my $home='';
854:
855: if ($stuname) {
856: $home=&homeserver($stuname,$domain);
857: }
858:
859: if (!$symb) {
860: unless ($symb=escape(&symbread())) { return ''; }
861: } else {
862: $symb=&escape($symb);
863: }
864: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
865: if (!$domain) { $domain=$ENV{'user.domain'}; }
866: if (!$stuname) { $stuname=$ENV{'user.name'}; }
867: if (!$home) { $home=$ENV{'user.home'}; }
868: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
869:
870: my %returnhash=();
871: map {
872: my ($name,$value)=split(/\=/,$_);
873: $returnhash{&unescape($name)}=&unescape($value);
874: } split(/\&/,$answer);
875: my $version;
876: for ($version=1;$version<=$returnhash{'version'};$version++) {
877: map {
878: $returnhash{$_}=$returnhash{$version.':'.$_};
879: } split(/\:/,$returnhash{$version.':keys'});
880: }
881: return %returnhash;
882: }
883:
884: # ---------------------------------------------------------- Course Description
885:
886: sub coursedescription {
887: my $courseid=shift;
888: $courseid=~s/^\///;
889: $courseid=~s/\_/\//g;
890: my ($cdomain,$cnum)=split(/\//,$courseid);
891: my $chome=&homeserver($cnum,$cdomain);
892: if ($chome ne 'no_host') {
893: my %returnhash=&dump('environment',$cdomain,$cnum);
894: if (!exists($returnhash{'con_lost'})) {
895: my $normalid=$cdomain.'_'.$cnum;
896: my %envhash=();
897: $returnhash{'home'}= $chome;
898: $returnhash{'domain'} = $cdomain;
899: $returnhash{'num'} = $cnum;
900: while (my ($name,$value) = each %returnhash) {
901: $envhash{'course.'.$normalid.'.'.$name}=$value;
902: }
903: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
904: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
905: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
906: $envhash{'course.'.$normalid.'.last_cache'}=time;
907: $envhash{'course.'.$normalid.'.home'}=$chome;
908: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
909: $envhash{'course.'.$normalid.'.num'}=$cnum;
910: &appenv(%envhash);
911: return %returnhash;
912: }
913: }
914: return ();
915: }
916:
917: # -------------------------------------------------------- Get user privileges
918:
919: sub rolesinit {
920: my ($domain,$username,$authhost)=@_;
921: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
922: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
923: my %allroles=();
924: my %thesepriv=();
925: my $now=time;
926: my $userroles="user.login.time=$now\n";
927: my $thesestr;
928:
929: if ($rolesdump ne '') {
930: map {
931: if ($_!~/^rolesdef\&/) {
932: my ($area,$role)=split(/=/,$_);
933: $area=~s/\_\w\w$//;
934: my ($trole,$tend,$tstart)=split(/_/,$role);
935: $userroles.='user.role.'.$trole.'.'.$area.'='.
936: $tstart.'.'.$tend."\n";
937: if ($tend!=0) {
938: if ($tend<$now) {
939: $trole='';
940: }
941: }
942: if ($tstart!=0) {
943: if ($tstart>$now) {
944: $trole='';
945: }
946: }
947: if (($area ne '') && ($trole ne '')) {
948: my $spec=$trole.'.'.$area;
949: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
950: if ($trole =~ /^cr\//) {
951: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
952: my $homsvr=homeserver($rauthor,$rdomain);
953: if ($hostname{$homsvr} ne '') {
954: my $roledef=
955: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
956: $homsvr);
957: if (($roledef ne 'con_lost') && ($roledef ne '')) {
958: my ($syspriv,$dompriv,$coursepriv)=
959: split(/\_/,unescape($roledef));
960: $allroles{'cm./'}.=':'.$syspriv;
961: $allroles{$spec.'./'}.=':'.$syspriv;
962: if ($tdomain ne '') {
963: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
964: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
965: if ($trest ne '') {
966: $allroles{'cm.'.$area}.=':'.$coursepriv;
967: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
968: }
969: }
970: }
971: }
972: } else {
973: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
974: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
975: if ($tdomain ne '') {
976: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
977: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
978: if ($trest ne '') {
979: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
980: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
981: }
982: }
983: }
984: }
985: }
986: } split(/&/,$rolesdump);
987: my $adv=0;
988: my $author=0;
989: map {
990: %thesepriv=();
991: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
992: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
993: map {
994: if ($_ ne '') {
995: my ($privilege,$restrictions)=split(/&/,$_);
996: if ($restrictions eq '') {
997: $thesepriv{$privilege}='F';
998: } else {
999: if ($thesepriv{$privilege} ne 'F') {
1000: $thesepriv{$privilege}.=$restrictions;
1001: }
1002: }
1003: }
1004: } split(/:/,$allroles{$_});
1005: $thesestr='';
1006: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1007: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1008: } keys %allroles;
1009: $userroles.='user.adv='.$adv."\n".
1010: 'user.author='.$author."\n";
1011: $ENV{'user.adv'}=$adv;
1012: }
1013: return $userroles;
1014: }
1015:
1016: # --------------------------------------------------------------- get interface
1017:
1018: sub get {
1019: my ($namespace,$storearr,$udomain,$uname)=@_;
1020: my $items='';
1021: map {
1022: $items.=escape($_).'&';
1023: } @$storearr;
1024: $items=~s/\&$//;
1025: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1026: if (!$uname) { $uname=$ENV{'user.name'}; }
1027: my $uhome=&homeserver($uname,$udomain);
1028:
1029: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1030: my @pairs=split(/\&/,$rep);
1031: my %returnhash=();
1032: my $i=0;
1033: map {
1034: $returnhash{$_}=unescape($pairs[$i]);
1035: $i++;
1036: } @$storearr;
1037: return %returnhash;
1038: }
1039:
1040: # --------------------------------------------------------------- del interface
1041:
1042: sub del {
1043: my ($namespace,$storearr,$udomain,$uname)=@_;
1044: my $items='';
1045: map {
1046: $items.=escape($_).'&';
1047: } @$storearr;
1048: $items=~s/\&$//;
1049: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1050: if (!$uname) { $uname=$ENV{'user.name'}; }
1051: my $uhome=&homeserver($uname,$udomain);
1052:
1053: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1054: }
1055:
1056: # -------------------------------------------------------------- dump interface
1057:
1058: sub dump {
1059: my ($namespace,$udomain,$uname)=@_;
1060: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1061: if (!$uname) { $uname=$ENV{'user.name'}; }
1062: my $uhome=&homeserver($uname,$udomain);
1063: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1064: my @pairs=split(/\&/,$rep);
1065: my %returnhash=();
1066: map {
1067: my ($key,$value)=split(/=/,$_);
1068: $returnhash{unescape($key)}=unescape($value);
1069: } @pairs;
1070: return %returnhash;
1071: }
1072:
1073: # --------------------------------------------------------------- put interface
1074:
1075: sub put {
1076: my ($namespace,$storehash,$udomain,$uname)=@_;
1077: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1078: if (!$uname) { $uname=$ENV{'user.name'}; }
1079: my $uhome=&homeserver($uname,$udomain);
1080: my $items='';
1081: map {
1082: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1083: } keys %$storehash;
1084: $items=~s/\&$//;
1085: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1086: }
1087:
1088: # ------------------------------------------------------ critical put interface
1089:
1090: sub cput {
1091: my ($namespace,$storehash,$udomain,$uname)=@_;
1092: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1093: if (!$uname) { $uname=$ENV{'user.name'}; }
1094: my $uhome=&homeserver($uname,$udomain);
1095: my $items='';
1096: map {
1097: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1098: } keys %$storehash;
1099: $items=~s/\&$//;
1100: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1101: }
1102:
1103: # -------------------------------------------------------------- eget interface
1104:
1105: sub eget {
1106: my ($namespace,$storearr,$udomain,$uname)=@_;
1107: my $items='';
1108: map {
1109: $items.=escape($_).'&';
1110: } @$storearr;
1111: $items=~s/\&$//;
1112: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1113: if (!$uname) { $uname=$ENV{'user.name'}; }
1114: my $uhome=&homeserver($uname,$udomain);
1115: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1116: my @pairs=split(/\&/,$rep);
1117: my %returnhash=();
1118: my $i=0;
1119: map {
1120: $returnhash{$_}=unescape($pairs[$i]);
1121: $i++;
1122: } @$storearr;
1123: return %returnhash;
1124: }
1125:
1126: # ------------------------------------------------- Check for a user privilege
1127:
1128: sub allowed {
1129: my ($priv,$uri)=@_;
1130:
1131: my $orguri=$uri;
1132: $uri=&declutter($uri);
1133:
1134: # Free bre access to adm and meta resources
1135:
1136: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1137: return 'F';
1138: }
1139:
1140: my $thisallowed='';
1141: my $statecond=0;
1142: my $courseprivid='';
1143:
1144: # Course
1145:
1146: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1147: $thisallowed.=$1;
1148: }
1149:
1150: # Domain
1151:
1152: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1153: =~/$priv\&([^\:]*)/) {
1154: $thisallowed.=$1;
1155: }
1156:
1157: # Course: uri itself is a course
1158: my $courseuri=$uri;
1159: $courseuri=~s/\_(\d)/\/$1/;
1160: $courseuri=~s/^([^\/])/\/$1/;
1161:
1162: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1163: =~/$priv\&([^\:]*)/) {
1164: $thisallowed.=$1;
1165: }
1166:
1167: # Full access at system, domain or course-wide level? Exit.
1168:
1169: if ($thisallowed=~/F/) {
1170: return 'F';
1171: }
1172:
1173: # If this is generating or modifying users, exit with special codes
1174:
1175: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1176: return $thisallowed;
1177: }
1178: #
1179: # Gathered so far: system, domain and course wide privileges
1180: #
1181: # Course: See if uri or referer is an individual resource that is part of
1182: # the course
1183:
1184: if ($ENV{'request.course.id'}) {
1185: $courseprivid=$ENV{'request.course.id'};
1186: if ($ENV{'request.course.sec'}) {
1187: $courseprivid.='/'.$ENV{'request.course.sec'};
1188: }
1189: $courseprivid=~s/\_/\//;
1190: my $checkreferer=1;
1191: my @uriparts=split(/\//,$uri);
1192: my $filename=$uriparts[$#uriparts];
1193: my $pathname=$uri;
1194: $pathname=~s/\/$filename$//;
1195: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1196: /\&$filename\:([\d\|]+)\&/) {
1197: $statecond=$1;
1198: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1199: =~/$priv\&([^\:]*)/) {
1200: $thisallowed.=$1;
1201: $checkreferer=0;
1202: }
1203: }
1204:
1205: if ($checkreferer) {
1206: my $refuri=$ENV{'httpref.'.$orguri};
1207:
1208: unless ($refuri) {
1209: map {
1210: if ($_=~/^httpref\..*\*/) {
1211: my $pattern=$_;
1212: $pattern=~s/^httpref\.\/res\///;
1213: $pattern=~s/\*/\[\^\/\]\+/g;
1214: $pattern=~s/\//\\\//g;
1215: if ($orguri=~/$pattern/) {
1216: $refuri=$ENV{$_};
1217: }
1218: }
1219: } keys %ENV;
1220: }
1221: if ($refuri) {
1222: $refuri=&declutter($refuri);
1223: my @uriparts=split(/\//,$refuri);
1224: my $filename=$uriparts[$#uriparts];
1225: my $pathname=$refuri;
1226: $pathname=~s/\/$filename$//;
1227: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1228: /\&$filename\:([\d\|]+)\&/) {
1229: my $refstatecond=$1;
1230: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1231: =~/$priv\&([^\:]*)/) {
1232: $thisallowed.=$1;
1233: $uri=$refuri;
1234: $statecond=$refstatecond;
1235: }
1236: }
1237: }
1238: }
1239: }
1240:
1241: #
1242: # Gathered now: all privileges that could apply, and condition number
1243: #
1244: #
1245: # Full or no access?
1246: #
1247:
1248: if ($thisallowed=~/F/) {
1249: return 'F';
1250: }
1251:
1252: unless ($thisallowed) {
1253: return '';
1254: }
1255:
1256: # Restrictions exist, deal with them
1257: #
1258: # C:according to course preferences
1259: # R:according to resource settings
1260: # L:unless locked
1261: # X:according to user session state
1262: #
1263:
1264: # Possibly locked functionality, check all courses
1265: # Locks might take effect only after 10 minutes cache expiration for other
1266: # courses, and 2 minutes for current course
1267:
1268: my $envkey;
1269: if ($thisallowed=~/L/) {
1270: foreach $envkey (keys %ENV) {
1271: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1272: my $courseid=$2;
1273: my $roleid=$1.'.'.$2;
1274: $courseid=~s/^\///;
1275: my $expiretime=600;
1276: if ($ENV{'request.role'} eq $roleid) {
1277: $expiretime=120;
1278: }
1279: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1280: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1281: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1282: &coursedescription($courseid);
1283: }
1284: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1285: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1286: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1287: &log($ENV{'user.domain'},$ENV{'user.name'},
1288: $ENV{'user.host'},
1289: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1290: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1291: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1292: return '';
1293: }
1294: }
1295: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1296: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1297: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1298: &log($ENV{'user.domain'},$ENV{'user.name'},
1299: $ENV{'user.host'},
1300: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1301: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1302: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1303: return '';
1304: }
1305: }
1306: }
1307: }
1308: }
1309:
1310: #
1311: # Rest of the restrictions depend on selected course
1312: #
1313:
1314: unless ($ENV{'request.course.id'}) {
1315: return '1';
1316: }
1317:
1318: #
1319: # Now user is definitely in a course
1320: #
1321:
1322:
1323: # Course preferences
1324:
1325: if ($thisallowed=~/C/) {
1326: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1327: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1328: =~/\,$rolecode\,/) {
1329: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1330: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1331: $ENV{'request.course.id'});
1332: return '';
1333: }
1334: }
1335:
1336: # Resource preferences
1337:
1338: if ($thisallowed=~/R/) {
1339: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1340: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1341: if (-e $filename) {
1342: my @content;
1343: {
1344: my $fh=Apache::File->new($filename);
1345: @content=<$fh>;
1346: }
1347: if (join('',@content)=~
1348: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1349: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1350: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1351: return '';
1352:
1353: }
1354: }
1355: }
1356:
1357: # Restricted by state?
1358:
1359: if ($thisallowed=~/X/) {
1360: if (&condval($statecond)) {
1361: return '2';
1362: } else {
1363: return '';
1364: }
1365: }
1366:
1367: return 'F';
1368: }
1369:
1370: # ----------------------------------------------------------------- Define Role
1371:
1372: sub definerole {
1373: if (allowed('mcr','/')) {
1374: my ($rolename,$sysrole,$domrole,$courole)=@_;
1375: map {
1376: my ($crole,$cqual)=split(/\&/,$_);
1377: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1378: if ($pr{'cr:s'}=~/$crole\&/) {
1379: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1380: return "refused:s:$crole&$cqual";
1381: }
1382: }
1383: } split('/',$sysrole);
1384: map {
1385: my ($crole,$cqual)=split(/\&/,$_);
1386: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1387: if ($pr{'cr:d'}=~/$crole\&/) {
1388: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1389: return "refused:d:$crole&$cqual";
1390: }
1391: }
1392: } split('/',$domrole);
1393: map {
1394: my ($crole,$cqual)=split(/\&/,$_);
1395: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1396: if ($pr{'cr:c'}=~/$crole\&/) {
1397: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1398: return "refused:c:$crole&$cqual";
1399: }
1400: }
1401: } split('/',$courole);
1402: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1403: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1404: "rolesdef_$rolename=".
1405: escape($sysrole.'_'.$domrole.'_'.$courole);
1406: return reply($command,$ENV{'user.home'});
1407: } else {
1408: return 'refused';
1409: }
1410: }
1411:
1412: # ---------------- Make a metadata query against the network of library servers
1413:
1414: sub metadata_query {
1415: my ($query,$custom,$customshow)=@_;
1416: # need to put in a library server loop here and return a hash
1417: my %rhash;
1418: for my $server (keys %libserv) {
1419: unless ($custom or $customshow) {
1420: my $reply=&reply("querysend:".&escape($query),$server);
1421: $rhash{$server}=$reply;
1422: }
1423: else {
1424: my $reply=&reply("querysend:".&escape($query).':'.
1425: &escape($custom).':'.&escape($customshow),
1426: $server);
1427: $rhash{$server}=$reply;
1428: }
1429: }
1430: return \%rhash;
1431: }
1432:
1433: # ------------------------------------------------------------------ Plain Text
1434:
1435: sub plaintext {
1436: my $short=shift;
1437: return $prp{$short};
1438: }
1439:
1440: # ------------------------------------------------------------------ Plain Text
1441:
1442: sub fileembstyle {
1443: my $ending=shift;
1444: return $fe{$ending};
1445: }
1446:
1447: # ------------------------------------------------------------ Description Text
1448:
1449: sub filedescription {
1450: my $ending=shift;
1451: return $fd{$ending};
1452: }
1453:
1454: # ----------------------------------------------------------------- Assign Role
1455:
1456: sub assignrole {
1457: my ($udom,$uname,$url,$role,$end,$start)=@_;
1458: my $mrole;
1459: if ($role =~ /^cr\//) {
1460: unless (&allowed('ccr',$url)) {
1461: &logthis('Refused custom assignrole: '.
1462: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1463: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1464: return 'refused';
1465: }
1466: $mrole='cr';
1467: } else {
1468: my $cwosec=$url;
1469: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1470: unless (&allowed('c'.$role,$cwosec)) {
1471: &logthis('Refused assignrole: '.
1472: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1473: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1474: return 'refused';
1475: }
1476: $mrole=$role;
1477: }
1478: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1479: "$udom:$uname:$url".'_'."$mrole=$role";
1480: if ($end) { $command.='_'.$end; }
1481: if ($start) {
1482: if ($end) {
1483: $command.='_'.$start;
1484: } else {
1485: $command.='_0_'.$start;
1486: }
1487: }
1488: return &reply($command,&homeserver($uname,$udom));
1489: }
1490:
1491: # --------------------------------------------------------------- Modify a user
1492:
1493:
1494: sub modifyuser {
1495: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1496: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1497: $umode.', '.$first.', '.$middle.', '.
1498: $last.', '.$gene.' by '.
1499: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1500: my $uhome=&homeserver($uname,$udom);
1501: # ----------------------------------------------------------------- Create User
1502: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1503: my $unhome='';
1504: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1505: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1506: } else {
1507: my $tryserver;
1508: my $loadm=10000000;
1509: foreach $tryserver (keys %libserv) {
1510: if ($hostdom{$tryserver} eq $udom) {
1511: my $answer=reply('load',$tryserver);
1512: if (($answer=~/\d+/) && ($answer<$loadm)) {
1513: $loadm=$answer;
1514: $unhome=$tryserver;
1515: }
1516: }
1517: }
1518: }
1519: if (($unhome eq '') || ($unhome eq 'no_host')) {
1520: return 'error: find home';
1521: }
1522: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1523: &escape($upass),$unhome);
1524: unless ($reply eq 'ok') {
1525: return 'error: '.$reply;
1526: }
1527: $uhome=&homeserver($uname,$udom);
1528: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1529: return 'error: verify home';
1530: }
1531: }
1532: # ---------------------------------------------------------------------- Add ID
1533: if ($uid) {
1534: $uid=~tr/A-Z/a-z/;
1535: my %uidhash=&idrget($udom,$uname);
1536: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1537: unless ($uid eq $uidhash{$uname}) {
1538: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1539: }
1540: } else {
1541: &idput($udom,($uname => $uid));
1542: }
1543: }
1544: # -------------------------------------------------------------- Add names, etc
1545: my %names=&get('environment',
1546: ['firstname','middlename','lastname','generation'],
1547: $udom,$uname);
1548: if ($first) { $names{'firstname'} = $first; }
1549: if ($middle) { $names{'middlename'} = $middle; }
1550: if ($last) { $names{'lastname'} = $last; }
1551: if ($gene) { $names{'generation'} = $gene; }
1552: my $reply = &put('environment', \%names, $udom,$uname);
1553: if ($reply ne 'ok') { return 'error: '.$reply; }
1554: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1555: $umode.', '.$first.', '.$middle.', '.
1556: $last.', '.$gene.' by '.
1557: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1558: return 'ok';
1559: }
1560:
1561: # -------------------------------------------------------------- Modify student
1562:
1563: sub modifystudent {
1564: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1565: $end,$start)=@_;
1566: my $cid='';
1567: unless ($cid=$ENV{'request.course.id'}) {
1568: return 'not_in_class';
1569: }
1570: # --------------------------------------------------------------- Make the user
1571: my $reply=&modifyuser
1572: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1573: unless ($reply eq 'ok') { return $reply; }
1574: my $uhome=&homeserver($uname,$udom);
1575: if (($uhome eq '') || ($uhome eq 'no_host')) {
1576: return 'error: no such user';
1577: }
1578: # -------------------------------------------------- Add student to course list
1579: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1580: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1581: &escape($uname.':'.$udom).'='.
1582: &escape($end.':'.$start),
1583: $ENV{'course.'.$cid.'.home'});
1584: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1585: return 'error: '.$reply;
1586: }
1587: # ---------------------------------------------------- Add student role to user
1588: my $uurl='/'.$cid;
1589: $uurl=~s/\_/\//g;
1590: if ($usec) {
1591: $uurl.='/'.$usec;
1592: }
1593: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1594: }
1595:
1596: # ------------------------------------------------- Write to course preferences
1597:
1598: sub writecoursepref {
1599: my ($courseid,%prefs)=@_;
1600: $courseid=~s/^\///;
1601: $courseid=~s/\_/\//g;
1602: my ($cdomain,$cnum)=split(/\//,$courseid);
1603: my $chome=homeserver($cnum,$cdomain);
1604: if (($chome eq '') || ($chome eq 'no_host')) {
1605: return 'error: no such course';
1606: }
1607: my $cstring='';
1608: map {
1609: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1610: } keys %prefs;
1611: $cstring=~s/\&$//;
1612: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1613: }
1614:
1615: # ---------------------------------------------------------- Make/modify course
1616:
1617: sub createcourse {
1618: my ($udom,$description,$url)=@_;
1619: $url=&declutter($url);
1620: my $cid='';
1621: unless (&allowed('ccc',$ENV{'user.domain'})) {
1622: return 'refused';
1623: }
1624: unless ($udom eq $ENV{'user.domain'}) {
1625: return 'refused';
1626: }
1627: # ------------------------------------------------------------------- Create ID
1628: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1629: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1630: # ----------------------------------------------- Make sure that does not exist
1631: my $uhome=&homeserver($uname,$udom);
1632: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1633: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1634: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1635: $uhome=&homeserver($uname,$udom);
1636: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1637: return 'error: unable to generate unique course-ID';
1638: }
1639: }
1640: # ------------------------------------------------------------- Make the course
1641: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1642: $ENV{'user.home'});
1643: unless ($reply eq 'ok') { return 'error: '.$reply; }
1644: my $uhome=&homeserver($uname,$udom);
1645: if (($uhome eq '') || ($uhome eq 'no_host')) {
1646: return 'error: no such course';
1647: }
1648: &writecoursepref($udom.'_'.$uname,
1649: ('description' => $description,
1650: 'url' => $url));
1651: return '/'.$udom.'/'.$uname;
1652: }
1653:
1654: # ---------------------------------------------------------- Assign Custom Role
1655:
1656: sub assigncustomrole {
1657: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1658: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1659: $end,$start);
1660: }
1661:
1662: # ----------------------------------------------------------------- Revoke Role
1663:
1664: sub revokerole {
1665: my ($udom,$uname,$url,$role)=@_;
1666: my $now=time;
1667: return &assignrole($udom,$uname,$url,$role,$now);
1668: }
1669:
1670: # ---------------------------------------------------------- Revoke Custom Role
1671:
1672: sub revokecustomrole {
1673: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1674: my $now=time;
1675: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1676: }
1677:
1678: # ------------------------------------------------------------ Directory lister
1679:
1680: sub dirlist {
1681: my $uri=shift;
1682: $uri=~s/^\///;
1683: $uri=~s/\/$//;
1684: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1685: if ($udom) {
1686: if ($uname) {
1687: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1688: homeserver($uname,$udom));
1689: return split(/:/,$listing);
1690: } else {
1691: my $tryserver;
1692: my %allusers=();
1693: foreach $tryserver (keys %libserv) {
1694: if ($hostdom{$tryserver} eq $udom) {
1695: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1696: $tryserver);
1697: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1698: && ($listing ne 'con_lost')) {
1699: map {
1700: my ($entry,@stat)=split(/&/,$_);
1701: $allusers{$entry}=1;
1702: } split(/:/,$listing);
1703: }
1704: }
1705: }
1706: my $alluserstr='';
1707: map {
1708: $alluserstr.=$_.'&user:';
1709: } sort keys %allusers;
1710: $alluserstr=~s/:$//;
1711: return split(/:/,$alluserstr);
1712: }
1713: } else {
1714: my $tryserver;
1715: my %alldom=();
1716: foreach $tryserver (keys %libserv) {
1717: $alldom{$hostdom{$tryserver}}=1;
1718: }
1719: my $alldomstr='';
1720: map {
1721: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1722: } sort keys %alldom;
1723: $alldomstr=~s/:$//;
1724: return split(/:/,$alldomstr);
1725: }
1726: }
1727:
1728: # -------------------------------------------------------- Value of a Condition
1729:
1730: sub directcondval {
1731: my $number=shift;
1732: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1733: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1734: } else {
1735: return 2;
1736: }
1737: }
1738:
1739: sub condval {
1740: my $condidx=shift;
1741: my $result=0;
1742: my $allpathcond='';
1743: map {
1744: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1745: $allpathcond.=
1746: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1747: }
1748: } split(/\|/,$condidx);
1749: $allpathcond=~s/\|$//;
1750: if ($ENV{'request.course.id'}) {
1751: if ($allpathcond) {
1752: my $operand='|';
1753: my @stack;
1754: map {
1755: if ($_ eq '(') {
1756: push @stack,($operand,$result)
1757: } elsif ($_ eq ')') {
1758: my $before=pop @stack;
1759: if (pop @stack eq '&') {
1760: $result=$result>$before?$before:$result;
1761: } else {
1762: $result=$result>$before?$result:$before;
1763: }
1764: } elsif (($_ eq '&') || ($_ eq '|')) {
1765: $operand=$_;
1766: } else {
1767: my $new=directcondval($_);
1768: if ($operand eq '&') {
1769: $result=$result>$new?$new:$result;
1770: } else {
1771: $result=$result>$new?$result:$new;
1772: }
1773: }
1774: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1775: }
1776: }
1777: return $result;
1778: }
1779:
1780: # --------------------------------------------------------- Value of a Variable
1781:
1782: sub EXT {
1783: my ($varname,$symbparm)=@_;
1784: unless ($varname) { return ''; }
1785: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1786: my $rest;
1787: if ($therest[0]) {
1788: $rest=join('.',@therest);
1789: } else {
1790: $rest='';
1791: }
1792: my $qualifierrest=$qualifier;
1793: if ($rest) { $qualifierrest.='.'.$rest; }
1794: my $spacequalifierrest=$space;
1795: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1796: if ($realm eq 'user') {
1797: # --------------------------------------------------------------- user.resource
1798: if ($space eq 'resource') {
1799: my %restored=&restore();
1800: return $restored{$qualifierrest};
1801: # ----------------------------------------------------------------- user.access
1802: } elsif ($space eq 'access') {
1803: return &allowed($qualifier,$rest);
1804: # ------------------------------------------ user.preferences, user.environment
1805: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1806: return $ENV{join('.',('environment',$qualifierrest))};
1807: # ----------------------------------------------------------------- user.course
1808: } elsif ($space eq 'course') {
1809: return $ENV{join('.',('request.course',$qualifier))};
1810: # ------------------------------------------------------------------- user.role
1811: } elsif ($space eq 'role') {
1812: my ($role,$where)=split(/\./,$ENV{'request.role'});
1813: if ($qualifier eq 'value') {
1814: return $role;
1815: } elsif ($qualifier eq 'extent') {
1816: return $where;
1817: }
1818: # ----------------------------------------------------------------- user.domain
1819: } elsif ($space eq 'domain') {
1820: return $ENV{'user.domain'};
1821: # ------------------------------------------------------------------- user.name
1822: } elsif ($space eq 'name') {
1823: return $ENV{'user.name'};
1824: # ---------------------------------------------------- Any other user namespace
1825: } else {
1826: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1827: my %reply=&get($space,[$item]);
1828: return $reply{$item};
1829: }
1830: } elsif ($realm eq 'request') {
1831: # ------------------------------------------------------------- request.browser
1832: if ($space eq 'browser') {
1833: return $ENV{'browser.'.$qualifier};
1834: # ------------------------------------------------------------ request.filename
1835: } else {
1836: return $ENV{'request.'.$spacequalifierrest};
1837: }
1838: } elsif ($realm eq 'course') {
1839: # ---------------------------------------------------------- course.description
1840: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
1841: $spacequalifierrest};
1842: } elsif ($realm eq 'resource') {
1843: if ($ENV{'request.course.id'}) {
1844:
1845: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1846:
1847:
1848: # ----------------------------------------------------- Cascading lookup scheme
1849: my $symbp;
1850: if ($symbparm) {
1851: $symbp=$symbparm;
1852: } else {
1853: $symbp=&symbread();
1854: }
1855: my $mapp=(split(/\_\_\_/,$symbp))[0];
1856:
1857: my $symbparm=$symbp.'.'.$spacequalifierrest;
1858: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1859:
1860: my $seclevel=
1861: $ENV{'request.course.id'}.'.['.
1862: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1863: my $seclevelr=
1864: $ENV{'request.course.id'}.'.['.
1865: $ENV{'request.course.sec'}.'].'.$symbparm;
1866: my $seclevelm=
1867: $ENV{'request.course.id'}.'.['.
1868: $ENV{'request.course.sec'}.'].'.$mapparm;
1869:
1870: my $courselevel=
1871: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1872: my $courselevelr=
1873: $ENV{'request.course.id'}.'.'.$symbparm;
1874: my $courselevelm=
1875: $ENV{'request.course.id'}.'.'.$mapparm;
1876:
1877: # ----------------------------------------------------------- first, check user
1878: my %resourcedata=get('resourcedata',
1879: [$courselevelr,$courselevelm,$courselevel]);
1880: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1881: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1882:
1883: if ($resourcedata{$courselevelr}) {
1884: return $resourcedata{$courselevelr}; }
1885: if ($resourcedata{$courselevelm}) {
1886: return $resourcedata{$courselevelm}; }
1887: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1888:
1889: } else {
1890: if ($resourcedata{$courselevelr}!~/No such file/) {
1891: &logthis("<font color=blue>WARNING:".
1892: " Trying to get resource data for ".$ENV{'user.name'}." at "
1893: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1894: "</font>");
1895: }
1896: }
1897:
1898: # -------------------------------------------------------- second, check course
1899:
1900: my $reply=&reply('get:'.
1901: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1902: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1903: ':resourcedata:'.
1904: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1905: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1906: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1907: if ($reply!~/^error\:/) {
1908: map {
1909: if ($_) { return &unescape($_); }
1910: } split(/\&/,$reply);
1911: }
1912: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1913: &logthis("<font color=blue>WARNING:".
1914: " Getting ".$reply." asking for ".$varname." for ".
1915: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1916: ' at '.
1917: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1918: ' from '.
1919: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1920: "</font>");
1921: }
1922: # ------------------------------------------------------ third, check map parms
1923: my %parmhash=();
1924: my $thisparm='';
1925: if (tie(%parmhash,'GDBM_File',
1926: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1927: $thisparm=$parmhash{$symbparm};
1928: untie(%parmhash);
1929: }
1930: if ($thisparm) { return $thisparm; }
1931: }
1932:
1933: # --------------------------------------------- last, look in resource metadata
1934:
1935: $spacequalifierrest=~s/\./\_/;
1936: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1937: if ($metadata) { return $metadata; }
1938: $metadata=&metadata($ENV{'request.filename'},
1939: 'parameter_'.$spacequalifierrest);
1940: if ($metadata) { return $metadata; }
1941:
1942: # ------------------------------------------------------------------ Cascade up
1943:
1944: unless ($space eq '0') {
1945: my ($part,$id)=split(/\_/,$space);
1946: if ($id) {
1947: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1948: $symbparm);
1949: if ($partgeneral) { return $partgeneral; }
1950: } else {
1951: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
1952: $symbparm);
1953: if ($resourcegeneral) { return $resourcegeneral; }
1954: }
1955: }
1956:
1957: # ---------------------------------------------------- Any other user namespace
1958: } elsif ($realm eq 'environment') {
1959: # ----------------------------------------------------------------- environment
1960: return $ENV{'environment.'.$spacequalifierrest};
1961: } elsif ($realm eq 'system') {
1962: # ----------------------------------------------------------------- system.time
1963: if ($space eq 'time') {
1964: return time;
1965: }
1966: }
1967: return '';
1968: }
1969:
1970: # ---------------------------------------------------------------- Get metadata
1971:
1972: sub metadata {
1973: my ($uri,$what)=@_;
1974:
1975: $uri=&declutter($uri);
1976: my $filename=$uri;
1977: $uri=~s/\.meta$//;
1978: unless ($metacache{$uri.':keys'}) {
1979: my %metathesekeys=();
1980: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1981: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1982: my $parser=HTML::TokeParser->new(\$metastring);
1983: my $token;
1984: undef %metathesekeys;
1985: while ($token=$parser->get_token) {
1986: if ($token->[0] eq 'S') {
1987: if (defined($token->[2]->{'package'})) {
1988: my $package=$token->[2]->{'package'};
1989: my $keyroot='';
1990: if (defined($token->[2]->{'part'})) {
1991: $keyroot.='_'.$token->[2]->{'part'};
1992: }
1993: if (defined($token->[2]->{'id'})) {
1994: $keyroot.='_'.$token->[2]->{'id'};
1995: }
1996: if ($metacache{$uri.':packages'}) {
1997: $metacache{$uri.':packages'}.=','.$package.$keyroot;
1998: } else {
1999: $metacache{$uri.':packages'}=$package.$keyroot;
2000: }
2001: map {
2002: if ($_=~/^$package\&/) {
2003: my ($pack,$name,$subp)=split(/\&/,$_);
2004: my $value=$packagetab{$_};
2005: my $part=$keyroot;
2006: $part=~s/^\_//;
2007: if ($subp eq 'display') {
2008: $value.=' [Part: '.$part.']';
2009: }
2010: my $unikey='parameter'.$keyroot.'_'.$name;
2011: $metathesekeys{$unikey}=1;
2012: $metacache{$uri.':'.$unikey.'.part'}=$part;
2013: unless
2014: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2015: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2016: }
2017: }
2018: } keys %packagetab;
2019: } else {
2020: my $entry=$token->[1];
2021: my $unikey=$entry;
2022: if (defined($token->[2]->{'part'})) {
2023: $unikey.='_'.$token->[2]->{'part'};
2024: }
2025: if (defined($token->[2]->{'id'})) {
2026: $unikey.='_'.$token->[2]->{'id'};
2027: }
2028: if (defined($token->[2]->{'name'})) {
2029: $unikey.='_'.$token->[2]->{'name'};
2030: }
2031: $metathesekeys{$unikey}=1;
2032: map {
2033: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2034: } @{$token->[3]};
2035: unless (
2036: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2037: ) { $metacache{$uri.':'.$unikey}=
2038: $metacache{$uri.':'.$unikey.'.default'};
2039: }
2040: }
2041: }
2042: }
2043: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2044: }
2045: return $metacache{$uri.':'.$what};
2046: }
2047:
2048: # ------------------------------------------------- Update symbolic store links
2049:
2050: sub symblist {
2051: my ($mapname,%newhash)=@_;
2052: $mapname=declutter($mapname);
2053: my %hash;
2054: if (($ENV{'request.course.fn'}) && (%newhash)) {
2055: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2056: &GDBM_WRCREAT,0640)) {
2057: map {
2058: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2059: } keys %newhash;
2060: if (untie(%hash)) {
2061: return 'ok';
2062: }
2063: }
2064: }
2065: return 'error';
2066: }
2067:
2068: # ------------------------------------------------------ Return symb list entry
2069:
2070: sub symbread {
2071: my $thisfn=shift;
2072: unless ($thisfn) {
2073: $thisfn=$ENV{'request.filename'};
2074: }
2075: $thisfn=declutter($thisfn);
2076: my %hash;
2077: my %bighash;
2078: my $syval='';
2079: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2080: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2081: &GDBM_READER,0640)) {
2082: $syval=$hash{$thisfn};
2083: untie(%hash);
2084: }
2085: # ---------------------------------------------------------- There was an entry
2086: if ($syval) {
2087: unless ($syval=~/\_\d+$/) {
2088: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2089: &appenv('request.ambiguous' => $thisfn);
2090: return '';
2091: }
2092: $syval.=$1;
2093: }
2094: } else {
2095: # ------------------------------------------------------- Was not in symb table
2096: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2097: &GDBM_READER,0640)) {
2098: # ---------------------------------------------- Get ID(s) for current resource
2099: my $ids=$bighash{'ids_/res/'.$thisfn};
2100: unless ($ids) {
2101: $ids=$bighash{'ids_/'.$thisfn};
2102: }
2103: if ($ids) {
2104: # ------------------------------------------------------------------- Has ID(s)
2105: my @possibilities=split(/\,/,$ids);
2106: if ($#possibilities==0) {
2107: # ----------------------------------------------- There is only one possibility
2108: my ($mapid,$resid)=split(/\./,$ids);
2109: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2110: } else {
2111: # ------------------------------------------ There is more than one possibility
2112: my $realpossible=0;
2113: map {
2114: my $file=$bighash{'src_'.$_};
2115: if (&allowed('bre',$file)) {
2116: my ($mapid,$resid)=split(/\./,$_);
2117: if ($bighash{'map_type_'.$mapid} ne 'page') {
2118: $realpossible++;
2119: $syval=declutter($bighash{'map_id_'.$mapid}).
2120: '___'.$resid;
2121: }
2122: }
2123: } @possibilities;
2124: if ($realpossible!=1) { $syval=''; }
2125: }
2126: }
2127: untie(%bighash)
2128: }
2129: }
2130: if ($syval) {
2131: return $syval.'___'.$thisfn;
2132: }
2133: }
2134: &appenv('request.ambiguous' => $thisfn);
2135: return '';
2136: }
2137:
2138: # ---------------------------------------------------------- Return random seed
2139:
2140: sub numval {
2141: my $txt=shift;
2142: $txt=~tr/A-J/0-9/;
2143: $txt=~tr/a-j/0-9/;
2144: $txt=~tr/K-T/0-9/;
2145: $txt=~tr/k-t/0-9/;
2146: $txt=~tr/U-Z/0-5/;
2147: $txt=~tr/u-z/0-5/;
2148: $txt=~s/\D//g;
2149: return int($txt);
2150: }
2151:
2152: sub rndseed {
2153: my ($symb,$courseid,$domain,$username)=@_;
2154: if (!$symb) {
2155: unless ($symb=&symbread()) { return time; }
2156: }
2157: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2158: if (!$domain) {$domain=$ENV{'user.domain'};}
2159: if (!$username) {$username=$ENV{'user.name'};}
2160: {
2161: use integer;
2162: my $symbchck=unpack("%32C*",$symb) << 27;
2163: my $symbseed=numval($symb) << 22;
2164: my $namechck=unpack("%32C*",$username) << 17;
2165: my $nameseed=numval($username) << 12;
2166: my $domainseed=unpack("%32C*",$domain) << 7;
2167: my $courseseed=unpack("%32C*",$courseid);
2168: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2169: #uncommenting these lines can break things!
2170: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2171: #&Apache::lonxml::debug("rndseed :$num:$symb");
2172: return $num;
2173: }
2174: }
2175:
2176: sub ireceipt {
2177: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2178: my $cuname=unpack("%32C*",$funame);
2179: my $cudom=unpack("%32C*",$fudom);
2180: my $cucourseid=unpack("%32C*",$fucourseid);
2181: my $cusymb=unpack("%32C*",$fusymb);
2182: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2183: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2184: ($cunique%$cuname+
2185: $cunique%$cudom+
2186: $cusymb%$cuname+
2187: $cusymb%$cudom+
2188: $cucourseid%$cuname+
2189: $cucourseid%$cudom);
2190: }
2191:
2192: sub receipt {
2193: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2194: $ENV{'request.course.id'},&symbread());
2195: }
2196:
2197: # ------------------------------------------------------------ Serves up a file
2198: # returns either the contents of the file or a -1
2199: sub getfile {
2200: my $file=shift;
2201: &repcopy($file);
2202: if (! -e $file ) { return -1; };
2203: my $fh=Apache::File->new($file);
2204: my $a='';
2205: while (<$fh>) { $a .=$_; }
2206: return $a
2207: }
2208:
2209: sub filelocation {
2210: my ($dir,$file) = @_;
2211: my $location;
2212: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2213: if ($file=~m:^/~:) { # is a contruction space reference
2214: $location = $file;
2215: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2216: } else {
2217: $file=~s/^$perlvar{'lonDocRoot'}//;
2218: $file=~s:^/*res::;
2219: if ( !( $file =~ m:^/:) ) {
2220: $location = $dir. '/'.$file;
2221: } else {
2222: $location = '/home/httpd/html/res'.$file;
2223: }
2224: }
2225: $location=~s://+:/:g; # remove duplicate /
2226: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2227: return $location;
2228: }
2229:
2230: sub hreflocation {
2231: my ($dir,$file)=@_;
2232: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2233: my $finalpath=filelocation($dir,$file);
2234: $finalpath=~s/^\/home\/httpd\/html//;
2235: return $finalpath;
2236: } else {
2237: return $file;
2238: }
2239: }
2240:
2241: # ------------------------------------------------------------- Declutters URLs
2242:
2243: sub declutter {
2244: my $thisfn=shift;
2245: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2246: $thisfn=~s/^\///;
2247: $thisfn=~s/^res\///;
2248: return $thisfn;
2249: }
2250:
2251: # -------------------------------------------------------- Escape Special Chars
2252:
2253: sub escape {
2254: my $str=shift;
2255: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2256: return $str;
2257: }
2258:
2259: # ----------------------------------------------------- Un-Escape Special Chars
2260:
2261: sub unescape {
2262: my $str=shift;
2263: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2264: return $str;
2265: }
2266:
2267: # ================================================================ Main Program
2268:
2269: sub BEGIN {
2270: if ($readit ne 'done') {
2271: # ------------------------------------------------------------ Read access.conf
2272: {
2273: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2274:
2275: while (my $configline=<$config>) {
2276: if ($configline =~ /PerlSetVar/) {
2277: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2278: chomp($varvalue);
2279: $perlvar{$varname}=$varvalue;
2280: }
2281: }
2282: }
2283:
2284: # ------------------------------------------------------------- Read hosts file
2285: {
2286: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2287:
2288: while (my $configline=<$config>) {
2289: chomp($configline);
2290: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2291: $hostname{$id}=$name;
2292: $hostdom{$id}=$domain;
2293: $hostip{$id}=$ip;
2294: if ($role eq 'library') { $libserv{$id}=$name; }
2295: }
2296: }
2297:
2298: # ------------------------------------------------------ Read spare server file
2299: {
2300: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2301:
2302: while (my $configline=<$config>) {
2303: chomp($configline);
2304: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2305: $spareid{$configline}=1;
2306: }
2307: }
2308: }
2309: # ------------------------------------------------------------ Read permissions
2310: {
2311: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2312:
2313: while (my $configline=<$config>) {
2314: chomp($configline);
2315: my ($role,$perm)=split(/ /,$configline);
2316: if ($perm ne '') { $pr{$role}=$perm; }
2317: }
2318: }
2319:
2320: # -------------------------------------------- Read plain texts for permissions
2321: {
2322: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2323:
2324: while (my $configline=<$config>) {
2325: chomp($configline);
2326: my ($short,$plain)=split(/:/,$configline);
2327: if ($plain ne '') { $prp{$short}=$plain; }
2328: }
2329: }
2330:
2331: # ---------------------------------------------------------- Read package table
2332: {
2333: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2334:
2335: while (my $configline=<$config>) {
2336: chomp($configline);
2337: my ($short,$plain)=split(/:/,$configline);
2338: my ($pack,$name)=split(/\&/,$short);
2339: if ($plain ne '') {
2340: $packagetab{$pack.'&'.$name.'&name'}=$name;
2341: $packagetab{$short}=$plain;
2342: }
2343: }
2344: }
2345:
2346: # ------------------------------------------------------------- Read file types
2347: {
2348: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2349:
2350: while (my $configline=<$config>) {
2351: chomp($configline);
2352: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2353: if ($descr[0] ne '') {
2354: $fe{$ending}=$emb;
2355: $fd{$ending}=join(' ',@descr);
2356: }
2357: }
2358: }
2359:
2360: %metacache=();
2361:
2362: $readit='done';
2363: &logthis('<font color=yellow>INFO: Read configuration</font>');
2364: }
2365: }
2366: 1;
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnet.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / lonnet / perl