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: # YEAR=2001
122: # 02/27/01 Scott Harrison
123: # 3/2 Gerd Kortemeyer
124: # 3/15,3/19 Scott Harrison
125: # 3/19,3/20 Gerd Kortemeyer
126: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
127: # 5/26,5/28 Gerd Kortemeyer
128: # 5/30 H. K. Ng
129: # 6/1 Gerd Kortemeyer
130: # July Guy Albertelli
131: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
132: # 10/2 Gerd Kortemeyer
133: # 10/5,10/10 Scott Harrison
134:
135: package Apache::lonnet;
136:
137: use strict;
138: use Apache::File;
139: use LWP::UserAgent();
140: use HTTP::Headers;
141: use vars
142: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab %courselogs);
143: use IO::Socket;
144: use GDBM_File;
145: use Apache::Constants qw(:common :http);
146: use HTML::TokeParser;
147: use Fcntl qw(:flock);
148:
149: # --------------------------------------------------------------------- Logging
150:
151: sub logtouch {
152: my $execdir=$perlvar{'lonDaemons'};
153: unless (-e "$execdir/logs/lonnet.log") {
154: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
155: close $fh;
156: }
157: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
158: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
159: }
160:
161: sub logthis {
162: my $message=shift;
163: my $execdir=$perlvar{'lonDaemons'};
164: my $now=time;
165: my $local=localtime($now);
166: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
167: print $fh "$local ($$): $message\n";
168: return 1;
169: }
170:
171: sub logperm {
172: my $message=shift;
173: my $execdir=$perlvar{'lonDaemons'};
174: my $now=time;
175: my $local=localtime($now);
176: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
177: print $fh "$now:$message:$local\n";
178: return 1;
179: }
180:
181: # -------------------------------------------------- Non-critical communication
182: sub subreply {
183: my ($cmd,$server)=@_;
184: my $peerfile="$perlvar{'lonSockDir'}/$server";
185: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
186: Type => SOCK_STREAM,
187: Timeout => 10)
188: or return "con_lost";
189: print $client "$cmd\n";
190: my $answer=<$client>;
191: if (!$answer) { $answer="con_lost"; }
192: chomp($answer);
193: return $answer;
194: }
195:
196: sub reply {
197: my ($cmd,$server)=@_;
198: my $answer=subreply($cmd,$server);
199: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
200: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
201: &logthis("<font color=blue>WARNING:".
202: " $cmd to $server returned $answer</font>");
203: }
204: return $answer;
205: }
206:
207: # ----------------------------------------------------------- Send USR1 to lonc
208:
209: sub reconlonc {
210: my $peerfile=shift;
211: &logthis("Trying to reconnect for $peerfile");
212: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
213: if (my $fh=Apache::File->new("$loncfile")) {
214: my $loncpid=<$fh>;
215: chomp($loncpid);
216: if (kill 0 => $loncpid) {
217: &logthis("lonc at pid $loncpid responding, sending USR1");
218: kill USR1 => $loncpid;
219: sleep 1;
220: if (-e "$peerfile") { return; }
221: &logthis("$peerfile still not there, give it another try");
222: sleep 5;
223: if (-e "$peerfile") { return; }
224: &logthis(
225: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
226: } else {
227: &logthis(
228: "<font color=blue>WARNING:".
229: " lonc at pid $loncpid not responding, giving up</font>");
230: }
231: } else {
232: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
233: }
234: }
235:
236: # ------------------------------------------------------ Critical communication
237:
238: sub critical {
239: my ($cmd,$server)=@_;
240: unless ($hostname{$server}) {
241: &logthis("<font color=blue>WARNING:".
242: " Critical message to unknown server ($server)</font>");
243: return 'no_such_host';
244: }
245: my $answer=reply($cmd,$server);
246: if ($answer eq 'con_lost') {
247: my $pingreply=reply('ping',$server);
248: &reconlonc("$perlvar{'lonSockDir'}/$server");
249: my $pongreply=reply('pong',$server);
250: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
251: $answer=reply($cmd,$server);
252: if ($answer eq 'con_lost') {
253: my $now=time;
254: my $middlename=$cmd;
255: $middlename=substr($middlename,0,16);
256: $middlename=~s/\W//g;
257: my $dfilename=
258: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
259: {
260: my $dfh;
261: if ($dfh=Apache::File->new(">$dfilename")) {
262: print $dfh "$cmd\n";
263: }
264: }
265: sleep 2;
266: my $wcmd='';
267: {
268: my $dfh;
269: if ($dfh=Apache::File->new("$dfilename")) {
270: $wcmd=<$dfh>;
271: }
272: }
273: chomp($wcmd);
274: if ($wcmd eq $cmd) {
275: &logthis("<font color=blue>WARNING: ".
276: "Connection buffer $dfilename: $cmd</font>");
277: &logperm("D:$server:$cmd");
278: return 'con_delayed';
279: } else {
280: &logthis("<font color=red>CRITICAL:"
281: ." Critical connection failed: $server $cmd</font>");
282: &logperm("F:$server:$cmd");
283: return 'con_failed';
284: }
285: }
286: }
287: return $answer;
288: }
289:
290: # ---------------------------------------------------------- Append Environment
291:
292: sub appenv {
293: my %newenv=@_;
294: map {
295: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
296: &logthis("<font color=blue>WARNING: ".
297: "Attempt to modify environment ".$_." to ".$newenv{$_}
298: .'</font>');
299: delete($newenv{$_});
300: } else {
301: $ENV{$_}=$newenv{$_};
302: }
303: } keys %newenv;
304:
305: my $lockfh;
306: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
307: return 'error: '.$!;
308: }
309: unless (flock($lockfh,LOCK_EX)) {
310: &logthis("<font color=blue>WARNING: ".
311: 'Could not obtain exclusive lock in appenv: '.$!);
312: $lockfh->close();
313: return 'error: '.$!;
314: }
315:
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error: '.$!;
321: }
322: @oldenv=<$fh>;
323: $fh->close();
324: }
325: for (my $i=0; $i<=$#oldenv; $i++) {
326: chomp($oldenv[$i]);
327: if ($oldenv[$i] ne '') {
328: my ($name,$value)=split(/=/,$oldenv[$i]);
329: unless (defined($newenv{$name})) {
330: $newenv{$name}=$value;
331: }
332: }
333: }
334: {
335: my $fh;
336: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
337: return 'error';
338: }
339: my $newname;
340: foreach $newname (keys %newenv) {
341: print $fh "$newname=$newenv{$newname}\n";
342: }
343: $fh->close();
344: }
345:
346: $lockfh->close();
347: return 'ok';
348: }
349: # ----------------------------------------------------- Delete from Environment
350:
351: sub delenv {
352: my $delthis=shift;
353: my %newenv=();
354: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
355: &logthis("<font color=blue>WARNING: ".
356: "Attempt to delete from environment ".$delthis);
357: return 'error';
358: }
359: my @oldenv;
360: {
361: my $fh;
362: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
363: return 'error';
364: }
365: unless (flock($fh,LOCK_SH)) {
366: &logthis("<font color=blue>WARNING: ".
367: 'Could not obtain shared lock in delenv: '.$!);
368: $fh->close();
369: return 'error: '.$!;
370: }
371: @oldenv=<$fh>;
372: $fh->close();
373: }
374: {
375: my $fh;
376: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
377: return 'error';
378: }
379: unless (flock($fh,LOCK_EX)) {
380: &logthis("<font color=blue>WARNING: ".
381: 'Could not obtain exclusive lock in delenv: '.$!);
382: $fh->close();
383: return 'error: '.$!;
384: }
385: map {
386: unless ($_=~/^$delthis/) { print $fh $_; }
387: } @oldenv;
388: $fh->close();
389: }
390: return 'ok';
391: }
392:
393: # ------------------------------ Find server with least workload from spare.tab
394:
395: sub spareserver {
396: my $tryserver;
397: my $spareserver='';
398: my $lowestserver=100;
399: foreach $tryserver (keys %spareid) {
400: my $answer=reply('load',$tryserver);
401: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
402: $spareserver="http://$hostname{$tryserver}";
403: $lowestserver=$answer;
404: }
405: }
406: return $spareserver;
407: }
408:
409: # --------- Try to authenticate user from domain's lib servers (first this one)
410:
411: sub authenticate {
412: my ($uname,$upass,$udom)=@_;
413: $upass=escape($upass);
414: if (($perlvar{'lonRole'} eq 'library') &&
415: ($udom eq $perlvar{'lonDefDomain'})) {
416: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
417: if ($answer =~ /authorized/) {
418: if ($answer eq 'authorized') {
419: &logthis("User $uname at $udom authorized by local server");
420: return $perlvar{'lonHostID'};
421: }
422: if ($answer eq 'non_authorized') {
423: &logthis("User $uname at $udom rejected by local server");
424: return 'no_host';
425: }
426: }
427: }
428:
429: my $tryserver;
430: foreach $tryserver (keys %libserv) {
431: if ($hostdom{$tryserver} eq $udom) {
432: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
433: if ($answer =~ /authorized/) {
434: if ($answer eq 'authorized') {
435: &logthis("User $uname at $udom authorized by $tryserver");
436: return $tryserver;
437: }
438: if ($answer eq 'non_authorized') {
439: &logthis("User $uname at $udom rejected by $tryserver");
440: return 'no_host';
441: }
442: }
443: }
444: }
445: &logthis("User $uname at $udom could not be authenticated");
446: return 'no_host';
447: }
448:
449: # ---------------------- Find the homebase for a user from domain's lib servers
450:
451: sub homeserver {
452: my ($uname,$udom)=@_;
453:
454: my $index="$uname:$udom";
455: if ($homecache{$index}) { return "$homecache{$index}"; }
456:
457: my $tryserver;
458: foreach $tryserver (keys %libserv) {
459: if ($hostdom{$tryserver} eq $udom) {
460: my $answer=reply("home:$udom:$uname",$tryserver);
461: if ($answer eq 'found') {
462: $homecache{$index}=$tryserver;
463: return $tryserver;
464: }
465: }
466: }
467: return 'no_host';
468: }
469:
470: # ------------------------------------- Find the usernames behind a list of IDs
471:
472: sub idget {
473: my ($udom,@ids)=@_;
474: my %returnhash=();
475:
476: my $tryserver;
477: foreach $tryserver (keys %libserv) {
478: if ($hostdom{$tryserver} eq $udom) {
479: my $idlist=join('&',@ids);
480: $idlist=~tr/A-Z/a-z/;
481: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
482: my @answer=();
483: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
484: @answer=split(/\&/,$reply);
485: } ;
486: my $i;
487: for ($i=0;$i<=$#ids;$i++) {
488: if ($answer[$i]) {
489: $returnhash{$ids[$i]}=$answer[$i];
490: }
491: }
492: }
493: }
494: return %returnhash;
495: }
496:
497: # ------------------------------------- Find the IDs behind a list of usernames
498:
499: sub idrget {
500: my ($udom,@unames)=@_;
501: my %returnhash=();
502: map {
503: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
504: } @unames;
505: return %returnhash;
506: }
507:
508: # ------------------------------- Store away a list of names and associated IDs
509:
510: sub idput {
511: my ($udom,%ids)=@_;
512: my %servers=();
513: map {
514: my $uhom=&homeserver($_,$udom);
515: if ($uhom ne 'no_host') {
516: my $id=&escape($ids{$_});
517: $id=~tr/A-Z/a-z/;
518: my $unam=&escape($_);
519: if ($servers{$uhom}) {
520: $servers{$uhom}.='&'.$id.'='.$unam;
521: } else {
522: $servers{$uhom}=$id.'='.$unam;
523: }
524: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
525: }
526: } keys %ids;
527: map {
528: &critical('idput:'.$udom.':'.$servers{$_},$_);
529: } keys %servers;
530: }
531:
532: # ------------------------------------- Find the section of student in a course
533:
534: sub usection {
535: my ($udom,$unam,$courseid)=@_;
536: $courseid=~s/\_/\//g;
537: $courseid=~s/^(\w)/\/$1/;
538: map {
539: my ($key,$value)=split(/\=/,$_);
540: $key=&unescape($key);
541: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
542: my $section=$1;
543: if ($key eq $courseid.'_st') { $section=''; }
544: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
545: my $now=time;
546: my $notactive=0;
547: if ($start) {
548: if ($now<$start) { $notactive=1; }
549: }
550: if ($end) {
551: if ($now>$end) { $notactive=1; }
552: }
553: unless ($notactive) { return $section; }
554: }
555: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
556: &homeserver($unam,$udom)));
557: return '-1';
558: }
559:
560: # ------------------------------------- Read an entry from a user's environment
561:
562: sub userenvironment {
563: my ($udom,$unam,@what)=@_;
564: my %returnhash=();
565: my @answer=split(/\&/,
566: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
567: &homeserver($unam,$udom)));
568: my $i;
569: for ($i=0;$i<=$#what;$i++) {
570: $returnhash{$what[$i]}=&unescape($answer[$i]);
571: }
572: return %returnhash;
573: }
574:
575: # ----------------------------- Subscribe to a resource, return URL if possible
576:
577: sub subscribe {
578: my $fname=shift;
579: my $author=$fname;
580: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
581: my ($udom,$uname)=split(/\//,$author);
582: my $home=homeserver($uname,$udom);
583: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
584: return 'not_found';
585: }
586: my $answer=reply("sub:$fname",$home);
587: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
588: $answer.=' by '.$home;
589: }
590: return $answer;
591: }
592:
593: # -------------------------------------------------------------- Replicate file
594:
595: sub repcopy {
596: my $filename=shift;
597: $filename=~s/\/+/\//g;
598: my $transname="$filename.in.transfer";
599: if ((-e $filename) || (-e $transname)) { return OK; }
600: my $remoteurl=subscribe($filename);
601: if ($remoteurl =~ /^con_lost by/) {
602: &logthis("Subscribe returned $remoteurl: $filename");
603: return HTTP_SERVICE_UNAVAILABLE;
604: } elsif ($remoteurl eq 'not_found') {
605: &logthis("Subscribe returned not_found: $filename");
606: return HTTP_NOT_FOUND;
607: } elsif ($remoteurl =~ /^rejected by/) {
608: &logthis("Subscribe returned $remoteurl: $filename");
609: return FORBIDDEN;
610: } elsif ($remoteurl eq 'directory') {
611: return OK;
612: } else {
613: my @parts=split(/\//,$filename);
614: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
615: if ($path ne "$perlvar{'lonDocRoot'}/res") {
616: &logthis("Malconfiguration for replication: $filename");
617: return HTTP_BAD_REQUEST;
618: }
619: my $count;
620: for ($count=5;$count<$#parts;$count++) {
621: $path.="/$parts[$count]";
622: if ((-e $path)!=1) {
623: mkdir($path,0777);
624: }
625: }
626: my $ua=new LWP::UserAgent;
627: my $request=new HTTP::Request('GET',"$remoteurl");
628: my $response=$ua->request($request,$transname);
629: if ($response->is_error()) {
630: unlink($transname);
631: my $message=$response->status_line;
632: &logthis("<font color=blue>WARNING:"
633: ." LWP get: $message: $filename</font>");
634: return HTTP_SERVICE_UNAVAILABLE;
635: } else {
636: if ($remoteurl!~/\.meta$/) {
637: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
638: my $mresponse=$ua->request($mrequest,$filename.'.meta');
639: if ($mresponse->is_error()) {
640: unlink($filename.'.meta');
641: &logthis(
642: "<font color=yellow>INFO: No metadata: $filename</font>");
643: }
644: }
645: rename($transname,$filename);
646: return OK;
647: }
648: }
649: }
650:
651: # --------------------------------------------------------- Server Side Include
652:
653: sub ssi {
654:
655: my ($fn,%form)=@_;
656:
657: my $ua=new LWP::UserAgent;
658:
659: my $request;
660:
661: if (%form) {
662: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
663: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
664: } else {
665: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
666: }
667:
668: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
669: my $response=$ua->request($request);
670:
671: return $response->content;
672: }
673:
674: # ------------------------------------------------------------------------- Log
675:
676: sub log {
677: my ($dom,$nam,$hom,$what)=@_;
678: return critical("log:$dom:$nam:$what",$hom);
679: }
680:
681: # ------------------------------------------------------------------ Course Log
682:
683: sub flushcourselogs {
684: &logthis('Flushing course log buffers');
685: map {
686: my $crsid=$_;
687: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
688: $ENV{'course.'.$crsid.'.num'}.':'.
689: &escape($courselogs{$crsid}),
690: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
691: delete $courselogs{$crsid};
692: } else {
693: &logthis('Failed to flush log buffer for '.$crsid);
694: if (length($courselogs{$crsid})>40000) {
695: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
696: " exceeded maximum size, deleting.</font>");
697: delete $courselogs{$crsid};
698: }
699: }
700: } keys %courselogs;
701: }
702:
703: sub courselog {
704: my $what=shift;
705: $what=time.':'.$what;
706: unless ($ENV{'request.course.id'}) { return ''; }
707: if (defined $courselogs{$ENV{'request.course.id'}}) {
708: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
709: } else {
710: $courselogs{$ENV{'request.course.id'}}.=$what;
711: }
712: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
713: &flushcourselogs();
714: }
715: }
716:
717: sub courseacclog {
718: my $fnsymb=shift;
719: unless ($ENV{'request.course.id'}) { return ''; }
720: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
721: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
722: map {
723: if ($_=~/^form\.(.*)/) {
724: $what.=':'.$1.'='.$ENV{$_};
725: }
726: } keys %ENV;
727: }
728: &courselog($what);
729: }
730:
731: # ----------------------------------------------------------- Check out an item
732:
733: sub checkout {
734: my ($symb,$tuname,$tudom,$tcrsid)=@_;
735: my $now=time;
736: my $lonhost=$perlvar{'lonHostID'};
737: my $infostr=&escape(
738: $tuname.'&'.
739: $tudom.'&'.
740: $tcrsid.'&'.
741: $symb.'&'.
742: $now.'&'.$ENV{'REMOTE_ADDR'});
743: my $token=&reply('tmpput:'.$infostr,$lonhost);
744: if ($token=~/^error\:/) {
745: &logthis("<font color=blue>WARNING: ".
746: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
747: "</font>");
748: return '';
749: }
750:
751: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
752: $token=~tr/a-z/A-Z/;
753:
754: my %infohash=('resource.0.outtoken' => $token,
755: 'resource.0.checkouttime' => $now,
756: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
757:
758: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
759: return '';
760: } else {
761: &logthis("<font color=blue>WARNING: ".
762: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
763: "</font>");
764: }
765:
766: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
767: &escape('Checkout '.$infostr.' - '.
768: $token)) ne 'ok') {
769: return '';
770: } else {
771: &logthis("<font color=blue>WARNING: ".
772: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
773: "</font>");
774: }
775: return $token;
776: }
777:
778: # ------------------------------------------------------------ Check in an item
779:
780: sub checkin {
781: my $token=shift;
782: my $now=time;
783: my ($ta,$tb,$lonhost)=split(/\*/,$token);
784: $lonhost=~tr/A-Z/a-z/;
785: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
786: $dtoken=~s/\W/\_/g;
787: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
788: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
789:
790: unless (($tuname) && ($tudom)) {
791: &logthis('Check in '.$token.' ('.$dtoken.') failed');
792: return '';
793: }
794:
795: unless (&allowed('mgr',$tcrsid)) {
796: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
797: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
798: return '';
799: }
800:
801: my %infohash=('resource.0.intoken' => $token,
802: 'resource.0.checkintime' => $now,
803: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
804:
805: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
806: return '';
807: }
808:
809: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
810: &escape('Checkin - '.$token)) ne 'ok') {
811: return '';
812: }
813:
814: return ($symb,$tuname,$tudom,$tcrsid);
815: }
816:
817: # --------------------------------------------- Set Expire Date for Spreadsheet
818:
819: sub expirespread {
820: my ($uname,$udom,$stype,$usymb)=@_;
821: my $cid=$ENV{'request.course.id'};
822: if ($cid) {
823: my $now=time;
824: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
825: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
826: $ENV{'course.'.$cid.'.num'}.
827: ':nohist_expirationdates:'.
828: &escape($key).'='.$now,
829: $ENV{'course.'.$cid.'.home'})
830: }
831: return 'ok';
832: }
833:
834: # ----------------------------------------------------- Devalidate Spreadsheets
835:
836: sub devalidate {
837: my $symb=shift;
838: my $cid=$ENV{'request.course.id'};
839: if ($cid) {
840: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
841: my $status=
842: &del('nohist_calculatedsheet',
843: [$key.'studentcalc'],
844: $ENV{'course.'.$cid.'.domain'},
845: $ENV{'course.'.$cid.'.num'})
846: .' '.
847: &del('nohist_calculatedsheets_'.$cid,
848: [$key.'assesscalc:'.$symb]);
849: unless ($status eq 'ok ok') {
850: &logthis('Could not devalidate spreadsheet '.
851: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
852: $symb.': '.$status);
853: }
854: }
855: }
856:
857: # ----------------------------------------------------------------------- Store
858:
859: sub store {
860: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
861: my $home='';
862:
863: if ($stuname) {
864: $home=&homeserver($stuname,$domain);
865: }
866:
867: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
868:
869: &devalidate($symb);
870:
871: $symb=escape($symb);
872: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
873: if (!$domain) { $domain=$ENV{'user.domain'}; }
874: if (!$stuname) { $stuname=$ENV{'user.name'}; }
875: if (!$home) { $home=$ENV{'user.home'}; }
876: my $namevalue='';
877: map {
878: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
879: } keys %$storehash;
880: $namevalue=~s/\&$//;
881: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
882: }
883:
884: # -------------------------------------------------------------- Critical Store
885:
886: sub cstore {
887: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
888: my $home='';
889:
890: if ($stuname) {
891: $home=&homeserver($stuname,$domain);
892: }
893:
894: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
895:
896: &devalidate($symb);
897:
898: $symb=escape($symb);
899: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
900: if (!$domain) { $domain=$ENV{'user.domain'}; }
901: if (!$stuname) { $stuname=$ENV{'user.name'}; }
902: if (!$home) { $home=$ENV{'user.home'}; }
903:
904: my $namevalue='';
905: map {
906: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
907: } keys %$storehash;
908: $namevalue=~s/\&$//;
909: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
910: }
911:
912: # --------------------------------------------------------------------- Restore
913:
914: sub restore {
915: my ($symb,$namespace,$domain,$stuname) = @_;
916: my $home='';
917:
918: if ($stuname) {
919: $home=&homeserver($stuname,$domain);
920: }
921:
922: if (!$symb) {
923: unless ($symb=escape(&symbread())) { return ''; }
924: } else {
925: $symb=&escape($symb);
926: }
927: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
928: if (!$domain) { $domain=$ENV{'user.domain'}; }
929: if (!$stuname) { $stuname=$ENV{'user.name'}; }
930: if (!$home) { $home=$ENV{'user.home'}; }
931: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
932:
933: my %returnhash=();
934: map {
935: my ($name,$value)=split(/\=/,$_);
936: $returnhash{&unescape($name)}=&unescape($value);
937: } split(/\&/,$answer);
938: my $version;
939: for ($version=1;$version<=$returnhash{'version'};$version++) {
940: map {
941: $returnhash{$_}=$returnhash{$version.':'.$_};
942: } split(/\:/,$returnhash{$version.':keys'});
943: }
944: return %returnhash;
945: }
946:
947: # ---------------------------------------------------------- Course Description
948:
949: sub coursedescription {
950: my $courseid=shift;
951: $courseid=~s/^\///;
952: $courseid=~s/\_/\//g;
953: my ($cdomain,$cnum)=split(/\//,$courseid);
954: my $chome=&homeserver($cnum,$cdomain);
955: if ($chome ne 'no_host') {
956: my %returnhash=&dump('environment',$cdomain,$cnum);
957: if (!exists($returnhash{'con_lost'})) {
958: my $normalid=$cdomain.'_'.$cnum;
959: my %envhash=();
960: $returnhash{'home'}= $chome;
961: $returnhash{'domain'} = $cdomain;
962: $returnhash{'num'} = $cnum;
963: while (my ($name,$value) = each %returnhash) {
964: $envhash{'course.'.$normalid.'.'.$name}=$value;
965: }
966: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
967: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
968: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
969: $envhash{'course.'.$normalid.'.last_cache'}=time;
970: $envhash{'course.'.$normalid.'.home'}=$chome;
971: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
972: $envhash{'course.'.$normalid.'.num'}=$cnum;
973: &appenv(%envhash);
974: return %returnhash;
975: }
976: }
977: return ();
978: }
979:
980: # -------------------------------------------------------- Get user privileges
981:
982: sub rolesinit {
983: my ($domain,$username,$authhost)=@_;
984: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
985: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
986: my %allroles=();
987: my %thesepriv=();
988: my $now=time;
989: my $userroles="user.login.time=$now\n";
990: my $thesestr;
991:
992: if ($rolesdump ne '') {
993: map {
994: if ($_!~/^rolesdef\&/) {
995: my ($area,$role)=split(/=/,$_);
996: $area=~s/\_\w\w$//;
997: my ($trole,$tend,$tstart)=split(/_/,$role);
998: $userroles.='user.role.'.$trole.'.'.$area.'='.
999: $tstart.'.'.$tend."\n";
1000: if ($tend!=0) {
1001: if ($tend<$now) {
1002: $trole='';
1003: }
1004: }
1005: if ($tstart!=0) {
1006: if ($tstart>$now) {
1007: $trole='';
1008: }
1009: }
1010: if (($area ne '') && ($trole ne '')) {
1011: my $spec=$trole.'.'.$area;
1012: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1013: if ($trole =~ /^cr\//) {
1014: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1015: my $homsvr=homeserver($rauthor,$rdomain);
1016: if ($hostname{$homsvr} ne '') {
1017: my $roledef=
1018: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1019: $homsvr);
1020: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1021: my ($syspriv,$dompriv,$coursepriv)=
1022: split(/\_/,unescape($roledef));
1023: $allroles{'cm./'}.=':'.$syspriv;
1024: $allroles{$spec.'./'}.=':'.$syspriv;
1025: if ($tdomain ne '') {
1026: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1027: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1028: if ($trest ne '') {
1029: $allroles{'cm.'.$area}.=':'.$coursepriv;
1030: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1031: }
1032: }
1033: }
1034: }
1035: } else {
1036: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1037: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1038: if ($tdomain ne '') {
1039: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1040: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1041: if ($trest ne '') {
1042: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1043: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1044: }
1045: }
1046: }
1047: }
1048: }
1049: } split(/&/,$rolesdump);
1050: my $adv=0;
1051: my $author=0;
1052: map {
1053: %thesepriv=();
1054: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1055: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1056: map {
1057: if ($_ ne '') {
1058: my ($privilege,$restrictions)=split(/&/,$_);
1059: if ($restrictions eq '') {
1060: $thesepriv{$privilege}='F';
1061: } else {
1062: if ($thesepriv{$privilege} ne 'F') {
1063: $thesepriv{$privilege}.=$restrictions;
1064: }
1065: }
1066: }
1067: } split(/:/,$allroles{$_});
1068: $thesestr='';
1069: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1070: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1071: } keys %allroles;
1072: $userroles.='user.adv='.$adv."\n".
1073: 'user.author='.$author."\n";
1074: $ENV{'user.adv'}=$adv;
1075: }
1076: return $userroles;
1077: }
1078:
1079: # --------------------------------------------------------------- get interface
1080:
1081: sub get {
1082: my ($namespace,$storearr,$udomain,$uname)=@_;
1083: my $items='';
1084: map {
1085: $items.=escape($_).'&';
1086: } @$storearr;
1087: $items=~s/\&$//;
1088: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1089: if (!$uname) { $uname=$ENV{'user.name'}; }
1090: my $uhome=&homeserver($uname,$udomain);
1091:
1092: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1093: my @pairs=split(/\&/,$rep);
1094: my %returnhash=();
1095: my $i=0;
1096: map {
1097: $returnhash{$_}=unescape($pairs[$i]);
1098: $i++;
1099: } @$storearr;
1100: return %returnhash;
1101: }
1102:
1103: # --------------------------------------------------------------- del interface
1104:
1105: sub del {
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:
1116: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1117: }
1118:
1119: # -------------------------------------------------------------- dump interface
1120:
1121: sub dump {
1122: my ($namespace,$udomain,$uname)=@_;
1123: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1124: if (!$uname) { $uname=$ENV{'user.name'}; }
1125: my $uhome=&homeserver($uname,$udomain);
1126: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1127: my @pairs=split(/\&/,$rep);
1128: my %returnhash=();
1129: map {
1130: my ($key,$value)=split(/=/,$_);
1131: $returnhash{unescape($key)}=unescape($value);
1132: } @pairs;
1133: return %returnhash;
1134: }
1135:
1136: # --------------------------------------------------------------- put interface
1137:
1138: sub put {
1139: my ($namespace,$storehash,$udomain,$uname)=@_;
1140: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1141: if (!$uname) { $uname=$ENV{'user.name'}; }
1142: my $uhome=&homeserver($uname,$udomain);
1143: my $items='';
1144: map {
1145: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1146: } keys %$storehash;
1147: $items=~s/\&$//;
1148: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1149: }
1150:
1151: # ------------------------------------------------------ critical put interface
1152:
1153: sub cput {
1154: my ($namespace,$storehash,$udomain,$uname)=@_;
1155: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1156: if (!$uname) { $uname=$ENV{'user.name'}; }
1157: my $uhome=&homeserver($uname,$udomain);
1158: my $items='';
1159: map {
1160: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1161: } keys %$storehash;
1162: $items=~s/\&$//;
1163: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1164: }
1165:
1166: # -------------------------------------------------------------- eget interface
1167:
1168: sub eget {
1169: my ($namespace,$storearr,$udomain,$uname)=@_;
1170: my $items='';
1171: map {
1172: $items.=escape($_).'&';
1173: } @$storearr;
1174: $items=~s/\&$//;
1175: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1176: if (!$uname) { $uname=$ENV{'user.name'}; }
1177: my $uhome=&homeserver($uname,$udomain);
1178: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1179: my @pairs=split(/\&/,$rep);
1180: my %returnhash=();
1181: my $i=0;
1182: map {
1183: $returnhash{$_}=unescape($pairs[$i]);
1184: $i++;
1185: } @$storearr;
1186: return %returnhash;
1187: }
1188:
1189: # ------------------------------------------------- Check for a user privilege
1190:
1191: sub allowed {
1192: my ($priv,$uri)=@_;
1193:
1194: my $orguri=$uri;
1195: $uri=&declutter($uri);
1196:
1197: # Free bre access to adm and meta resources
1198:
1199: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1200: return 'F';
1201: }
1202:
1203: # Free bre to public access
1204:
1205: if ($priv eq 'bre') {
1206: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1207: }
1208:
1209: my $thisallowed='';
1210: my $statecond=0;
1211: my $courseprivid='';
1212:
1213: # Course
1214:
1215: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1216: $thisallowed.=$1;
1217: }
1218:
1219: # Domain
1220:
1221: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1222: =~/$priv\&([^\:]*)/) {
1223: $thisallowed.=$1;
1224: }
1225:
1226: # Course: uri itself is a course
1227: my $courseuri=$uri;
1228: $courseuri=~s/\_(\d)/\/$1/;
1229: $courseuri=~s/^([^\/])/\/$1/;
1230:
1231: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1232: =~/$priv\&([^\:]*)/) {
1233: $thisallowed.=$1;
1234: }
1235:
1236: # Full access at system, domain or course-wide level? Exit.
1237:
1238: if ($thisallowed=~/F/) {
1239: return 'F';
1240: }
1241:
1242: # If this is generating or modifying users, exit with special codes
1243:
1244: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1245: return $thisallowed;
1246: }
1247: #
1248: # Gathered so far: system, domain and course wide privileges
1249: #
1250: # Course: See if uri or referer is an individual resource that is part of
1251: # the course
1252:
1253: if ($ENV{'request.course.id'}) {
1254: $courseprivid=$ENV{'request.course.id'};
1255: if ($ENV{'request.course.sec'}) {
1256: $courseprivid.='/'.$ENV{'request.course.sec'};
1257: }
1258: $courseprivid=~s/\_/\//;
1259: my $checkreferer=1;
1260: my @uriparts=split(/\//,$uri);
1261: my $filename=$uriparts[$#uriparts];
1262: my $pathname=$uri;
1263: $pathname=~s/\/$filename$//;
1264: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1265: /\&$filename\:([\d\|]+)\&/) {
1266: $statecond=$1;
1267: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1268: =~/$priv\&([^\:]*)/) {
1269: $thisallowed.=$1;
1270: $checkreferer=0;
1271: }
1272: }
1273:
1274: if ($checkreferer) {
1275: my $refuri=$ENV{'httpref.'.$orguri};
1276:
1277: unless ($refuri) {
1278: map {
1279: if ($_=~/^httpref\..*\*/) {
1280: my $pattern=$_;
1281: $pattern=~s/^httpref\.\/res\///;
1282: $pattern=~s/\*/\[\^\/\]\+/g;
1283: $pattern=~s/\//\\\//g;
1284: if ($orguri=~/$pattern/) {
1285: $refuri=$ENV{$_};
1286: }
1287: }
1288: } keys %ENV;
1289: }
1290: if ($refuri) {
1291: $refuri=&declutter($refuri);
1292: my @uriparts=split(/\//,$refuri);
1293: my $filename=$uriparts[$#uriparts];
1294: my $pathname=$refuri;
1295: $pathname=~s/\/$filename$//;
1296: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1297: /\&$filename\:([\d\|]+)\&/) {
1298: my $refstatecond=$1;
1299: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1300: =~/$priv\&([^\:]*)/) {
1301: $thisallowed.=$1;
1302: $uri=$refuri;
1303: $statecond=$refstatecond;
1304: }
1305: }
1306: }
1307: }
1308: }
1309:
1310: #
1311: # Gathered now: all privileges that could apply, and condition number
1312: #
1313: #
1314: # Full or no access?
1315: #
1316:
1317: if ($thisallowed=~/F/) {
1318: return 'F';
1319: }
1320:
1321: unless ($thisallowed) {
1322: return '';
1323: }
1324:
1325: # Restrictions exist, deal with them
1326: #
1327: # C:according to course preferences
1328: # R:according to resource settings
1329: # L:unless locked
1330: # X:according to user session state
1331: #
1332:
1333: # Possibly locked functionality, check all courses
1334: # Locks might take effect only after 10 minutes cache expiration for other
1335: # courses, and 2 minutes for current course
1336:
1337: my $envkey;
1338: if ($thisallowed=~/L/) {
1339: foreach $envkey (keys %ENV) {
1340: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1341: my $courseid=$2;
1342: my $roleid=$1.'.'.$2;
1343: $courseid=~s/^\///;
1344: my $expiretime=600;
1345: if ($ENV{'request.role'} eq $roleid) {
1346: $expiretime=120;
1347: }
1348: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1349: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1350: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1351: &coursedescription($courseid);
1352: }
1353: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1354: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1355: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1356: &log($ENV{'user.domain'},$ENV{'user.name'},
1357: $ENV{'user.host'},
1358: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1359: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1360: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1361: return '';
1362: }
1363: }
1364: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1365: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1366: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1367: &log($ENV{'user.domain'},$ENV{'user.name'},
1368: $ENV{'user.host'},
1369: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1370: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1371: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1372: return '';
1373: }
1374: }
1375: }
1376: }
1377: }
1378:
1379: #
1380: # Rest of the restrictions depend on selected course
1381: #
1382:
1383: unless ($ENV{'request.course.id'}) {
1384: return '1';
1385: }
1386:
1387: #
1388: # Now user is definitely in a course
1389: #
1390:
1391:
1392: # Course preferences
1393:
1394: if ($thisallowed=~/C/) {
1395: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1396: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1397: =~/\,$rolecode\,/) {
1398: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1399: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1400: $ENV{'request.course.id'});
1401: return '';
1402: }
1403: }
1404:
1405: # Resource preferences
1406:
1407: if ($thisallowed=~/R/) {
1408: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1409: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1410: if (-e $filename) {
1411: my @content;
1412: {
1413: my $fh=Apache::File->new($filename);
1414: @content=<$fh>;
1415: }
1416: if (join('',@content)=~
1417: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1418: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1419: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1420: return '';
1421:
1422: }
1423: }
1424: }
1425:
1426: # Restricted by state?
1427:
1428: if ($thisallowed=~/X/) {
1429: if (&condval($statecond)) {
1430: return '2';
1431: } else {
1432: return '';
1433: }
1434: }
1435:
1436: return 'F';
1437: }
1438:
1439: # ----------------------------------------------------------------- Define Role
1440:
1441: sub definerole {
1442: if (allowed('mcr','/')) {
1443: my ($rolename,$sysrole,$domrole,$courole)=@_;
1444: map {
1445: my ($crole,$cqual)=split(/\&/,$_);
1446: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1447: if ($pr{'cr:s'}=~/$crole\&/) {
1448: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1449: return "refused:s:$crole&$cqual";
1450: }
1451: }
1452: } split('/',$sysrole);
1453: map {
1454: my ($crole,$cqual)=split(/\&/,$_);
1455: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1456: if ($pr{'cr:d'}=~/$crole\&/) {
1457: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1458: return "refused:d:$crole&$cqual";
1459: }
1460: }
1461: } split('/',$domrole);
1462: map {
1463: my ($crole,$cqual)=split(/\&/,$_);
1464: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1465: if ($pr{'cr:c'}=~/$crole\&/) {
1466: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1467: return "refused:c:$crole&$cqual";
1468: }
1469: }
1470: } split('/',$courole);
1471: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1472: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1473: "rolesdef_$rolename=".
1474: escape($sysrole.'_'.$domrole.'_'.$courole);
1475: return reply($command,$ENV{'user.home'});
1476: } else {
1477: return 'refused';
1478: }
1479: }
1480:
1481: # ---------------- Make a metadata query against the network of library servers
1482:
1483: sub metadata_query {
1484: my ($query,$custom,$customshow)=@_;
1485: # need to put in a library server loop here and return a hash
1486: my %rhash;
1487: for my $server (keys %libserv) {
1488: unless ($custom or $customshow) {
1489: my $reply=&reply("querysend:".&escape($query),$server);
1490: $rhash{$server}=$reply;
1491: }
1492: else {
1493: my $reply=&reply("querysend:".&escape($query).':'.
1494: &escape($custom).':'.&escape($customshow),
1495: $server);
1496: $rhash{$server}=$reply;
1497: }
1498: }
1499: return \%rhash;
1500: }
1501:
1502: # ------------------------------------------------------------------ Plain Text
1503:
1504: sub plaintext {
1505: my $short=shift;
1506: return $prp{$short};
1507: }
1508:
1509: # ------------------------------------------------------------------ Plain Text
1510:
1511: sub fileembstyle {
1512: my $ending=shift;
1513: return $fe{$ending};
1514: }
1515:
1516: # ------------------------------------------------------------ Description Text
1517:
1518: sub filedescription {
1519: my $ending=shift;
1520: return $fd{$ending};
1521: }
1522:
1523: # ----------------------------------------------------------------- Assign Role
1524:
1525: sub assignrole {
1526: my ($udom,$uname,$url,$role,$end,$start)=@_;
1527: my $mrole;
1528: if ($role =~ /^cr\//) {
1529: unless (&allowed('ccr',$url)) {
1530: &logthis('Refused custom assignrole: '.
1531: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1532: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1533: return 'refused';
1534: }
1535: $mrole='cr';
1536: } else {
1537: my $cwosec=$url;
1538: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1539: unless (&allowed('c'.$role,$cwosec)) {
1540: &logthis('Refused assignrole: '.
1541: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1542: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1543: return 'refused';
1544: }
1545: $mrole=$role;
1546: }
1547: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1548: "$udom:$uname:$url".'_'."$mrole=$role";
1549: if ($end) { $command.='_'.$end; }
1550: if ($start) {
1551: if ($end) {
1552: $command.='_'.$start;
1553: } else {
1554: $command.='_0_'.$start;
1555: }
1556: }
1557: return &reply($command,&homeserver($uname,$udom));
1558: }
1559:
1560: # --------------------------------------------------------------- Modify a user
1561:
1562:
1563: sub modifyuser {
1564: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1565: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1566: $umode.', '.$first.', '.$middle.', '.
1567: $last.', '.$gene.' by '.
1568: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1569: my $uhome=&homeserver($uname,$udom);
1570: # ----------------------------------------------------------------- Create User
1571: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1572: my $unhome='';
1573: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1574: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1575: } else {
1576: my $tryserver;
1577: my $loadm=10000000;
1578: foreach $tryserver (keys %libserv) {
1579: if ($hostdom{$tryserver} eq $udom) {
1580: my $answer=reply('load',$tryserver);
1581: if (($answer=~/\d+/) && ($answer<$loadm)) {
1582: $loadm=$answer;
1583: $unhome=$tryserver;
1584: }
1585: }
1586: }
1587: }
1588: if (($unhome eq '') || ($unhome eq 'no_host')) {
1589: return 'error: find home';
1590: }
1591: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1592: &escape($upass),$unhome);
1593: unless ($reply eq 'ok') {
1594: return 'error: '.$reply;
1595: }
1596: $uhome=&homeserver($uname,$udom);
1597: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1598: return 'error: verify home';
1599: }
1600: }
1601: # ---------------------------------------------------------------------- Add ID
1602: if ($uid) {
1603: $uid=~tr/A-Z/a-z/;
1604: my %uidhash=&idrget($udom,$uname);
1605: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1606: unless ($uid eq $uidhash{$uname}) {
1607: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1608: }
1609: } else {
1610: &idput($udom,($uname => $uid));
1611: }
1612: }
1613: # -------------------------------------------------------------- Add names, etc
1614: my %names=&get('environment',
1615: ['firstname','middlename','lastname','generation'],
1616: $udom,$uname);
1617: if ($first) { $names{'firstname'} = $first; }
1618: if ($middle) { $names{'middlename'} = $middle; }
1619: if ($last) { $names{'lastname'} = $last; }
1620: if ($gene) { $names{'generation'} = $gene; }
1621: my $reply = &put('environment', \%names, $udom,$uname);
1622: if ($reply ne 'ok') { return 'error: '.$reply; }
1623: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1624: $umode.', '.$first.', '.$middle.', '.
1625: $last.', '.$gene.' by '.
1626: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1627: return 'ok';
1628: }
1629:
1630: # -------------------------------------------------------------- Modify student
1631:
1632: sub modifystudent {
1633: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1634: $end,$start)=@_;
1635: my $cid='';
1636: unless ($cid=$ENV{'request.course.id'}) {
1637: return 'not_in_class';
1638: }
1639: # --------------------------------------------------------------- Make the user
1640: my $reply=&modifyuser
1641: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1642: unless ($reply eq 'ok') { return $reply; }
1643: my $uhome=&homeserver($uname,$udom);
1644: if (($uhome eq '') || ($uhome eq 'no_host')) {
1645: return 'error: no such user';
1646: }
1647: # -------------------------------------------------- Add student to course list
1648: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1649: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1650: &escape($uname.':'.$udom).'='.
1651: &escape($end.':'.$start),
1652: $ENV{'course.'.$cid.'.home'});
1653: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1654: return 'error: '.$reply;
1655: }
1656: # ---------------------------------------------------- Add student role to user
1657: my $uurl='/'.$cid;
1658: $uurl=~s/\_/\//g;
1659: if ($usec) {
1660: $uurl.='/'.$usec;
1661: }
1662: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1663: }
1664:
1665: # ------------------------------------------------- Write to course preferences
1666:
1667: sub writecoursepref {
1668: my ($courseid,%prefs)=@_;
1669: $courseid=~s/^\///;
1670: $courseid=~s/\_/\//g;
1671: my ($cdomain,$cnum)=split(/\//,$courseid);
1672: my $chome=homeserver($cnum,$cdomain);
1673: if (($chome eq '') || ($chome eq 'no_host')) {
1674: return 'error: no such course';
1675: }
1676: my $cstring='';
1677: map {
1678: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1679: } keys %prefs;
1680: $cstring=~s/\&$//;
1681: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1682: }
1683:
1684: # ---------------------------------------------------------- Make/modify course
1685:
1686: sub createcourse {
1687: my ($udom,$description,$url)=@_;
1688: $url=&declutter($url);
1689: my $cid='';
1690: unless (&allowed('ccc',$ENV{'user.domain'})) {
1691: return 'refused';
1692: }
1693: unless ($udom eq $ENV{'user.domain'}) {
1694: return 'refused';
1695: }
1696: # ------------------------------------------------------------------- Create ID
1697: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1698: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1699: # ----------------------------------------------- Make sure that does not exist
1700: my $uhome=&homeserver($uname,$udom);
1701: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1702: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1703: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1704: $uhome=&homeserver($uname,$udom);
1705: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1706: return 'error: unable to generate unique course-ID';
1707: }
1708: }
1709: # ------------------------------------------------------------- Make the course
1710: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1711: $ENV{'user.home'});
1712: unless ($reply eq 'ok') { return 'error: '.$reply; }
1713: $uhome=&homeserver($uname,$udom);
1714: if (($uhome eq '') || ($uhome eq 'no_host')) {
1715: return 'error: no such course';
1716: }
1717: &writecoursepref($udom.'_'.$uname,
1718: ('description' => $description,
1719: 'url' => $url));
1720: return '/'.$udom.'/'.$uname;
1721: }
1722:
1723: # ---------------------------------------------------------- Assign Custom Role
1724:
1725: sub assigncustomrole {
1726: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1727: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1728: $end,$start);
1729: }
1730:
1731: # ----------------------------------------------------------------- Revoke Role
1732:
1733: sub revokerole {
1734: my ($udom,$uname,$url,$role)=@_;
1735: my $now=time;
1736: return &assignrole($udom,$uname,$url,$role,$now);
1737: }
1738:
1739: # ---------------------------------------------------------- Revoke Custom Role
1740:
1741: sub revokecustomrole {
1742: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1743: my $now=time;
1744: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1745: }
1746:
1747: # ------------------------------------------------------------ Directory lister
1748:
1749: sub dirlist {
1750: my $uri=shift;
1751: $uri=~s/^\///;
1752: $uri=~s/\/$//;
1753: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1754: if ($udom) {
1755: if ($uname) {
1756: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1757: homeserver($uname,$udom));
1758: return split(/:/,$listing);
1759: } else {
1760: my $tryserver;
1761: my %allusers=();
1762: foreach $tryserver (keys %libserv) {
1763: if ($hostdom{$tryserver} eq $udom) {
1764: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1765: $tryserver);
1766: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1767: && ($listing ne 'con_lost')) {
1768: map {
1769: my ($entry,@stat)=split(/&/,$_);
1770: $allusers{$entry}=1;
1771: } split(/:/,$listing);
1772: }
1773: }
1774: }
1775: my $alluserstr='';
1776: map {
1777: $alluserstr.=$_.'&user:';
1778: } sort keys %allusers;
1779: $alluserstr=~s/:$//;
1780: return split(/:/,$alluserstr);
1781: }
1782: } else {
1783: my $tryserver;
1784: my %alldom=();
1785: foreach $tryserver (keys %libserv) {
1786: $alldom{$hostdom{$tryserver}}=1;
1787: }
1788: my $alldomstr='';
1789: map {
1790: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1791: } sort keys %alldom;
1792: $alldomstr=~s/:$//;
1793: return split(/:/,$alldomstr);
1794: }
1795: }
1796:
1797: # -------------------------------------------------------- Value of a Condition
1798:
1799: sub directcondval {
1800: my $number=shift;
1801: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1802: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1803: } else {
1804: return 2;
1805: }
1806: }
1807:
1808: sub condval {
1809: my $condidx=shift;
1810: my $result=0;
1811: my $allpathcond='';
1812: map {
1813: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1814: $allpathcond.=
1815: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1816: }
1817: } split(/\|/,$condidx);
1818: $allpathcond=~s/\|$//;
1819: if ($ENV{'request.course.id'}) {
1820: if ($allpathcond) {
1821: my $operand='|';
1822: my @stack;
1823: map {
1824: if ($_ eq '(') {
1825: push @stack,($operand,$result)
1826: } elsif ($_ eq ')') {
1827: my $before=pop @stack;
1828: if (pop @stack eq '&') {
1829: $result=$result>$before?$before:$result;
1830: } else {
1831: $result=$result>$before?$result:$before;
1832: }
1833: } elsif (($_ eq '&') || ($_ eq '|')) {
1834: $operand=$_;
1835: } else {
1836: my $new=directcondval($_);
1837: if ($operand eq '&') {
1838: $result=$result>$new?$new:$result;
1839: } else {
1840: $result=$result>$new?$result:$new;
1841: }
1842: }
1843: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1844: }
1845: }
1846: return $result;
1847: }
1848:
1849: # --------------------------------------------------------- Value of a Variable
1850:
1851: sub EXT {
1852: my ($varname,$symbparm)=@_;
1853: unless ($varname) { return ''; }
1854: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1855: my $rest;
1856: if ($therest[0]) {
1857: $rest=join('.',@therest);
1858: } else {
1859: $rest='';
1860: }
1861: my $qualifierrest=$qualifier;
1862: if ($rest) { $qualifierrest.='.'.$rest; }
1863: my $spacequalifierrest=$space;
1864: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1865: if ($realm eq 'user') {
1866: # --------------------------------------------------------------- user.resource
1867: if ($space eq 'resource') {
1868: my %restored=&restore();
1869: return $restored{$qualifierrest};
1870: # ----------------------------------------------------------------- user.access
1871: } elsif ($space eq 'access') {
1872: return &allowed($qualifier,$rest);
1873: # ------------------------------------------ user.preferences, user.environment
1874: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1875: return $ENV{join('.',('environment',$qualifierrest))};
1876: # ----------------------------------------------------------------- user.course
1877: } elsif ($space eq 'course') {
1878: return $ENV{join('.',('request.course',$qualifier))};
1879: # ------------------------------------------------------------------- user.role
1880: } elsif ($space eq 'role') {
1881: my ($role,$where)=split(/\./,$ENV{'request.role'});
1882: if ($qualifier eq 'value') {
1883: return $role;
1884: } elsif ($qualifier eq 'extent') {
1885: return $where;
1886: }
1887: # ----------------------------------------------------------------- user.domain
1888: } elsif ($space eq 'domain') {
1889: return $ENV{'user.domain'};
1890: # ------------------------------------------------------------------- user.name
1891: } elsif ($space eq 'name') {
1892: return $ENV{'user.name'};
1893: # ---------------------------------------------------- Any other user namespace
1894: } else {
1895: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1896: my %reply=&get($space,[$item]);
1897: return $reply{$item};
1898: }
1899: } elsif ($realm eq 'request') {
1900: # ------------------------------------------------------------- request.browser
1901: if ($space eq 'browser') {
1902: return $ENV{'browser.'.$qualifier};
1903: # ------------------------------------------------------------ request.filename
1904: } else {
1905: return $ENV{'request.'.$spacequalifierrest};
1906: }
1907: } elsif ($realm eq 'course') {
1908: # ---------------------------------------------------------- course.description
1909: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
1910: $spacequalifierrest};
1911: } elsif ($realm eq 'resource') {
1912: if ($ENV{'request.course.id'}) {
1913:
1914: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1915:
1916:
1917: # ----------------------------------------------------- Cascading lookup scheme
1918: my $symbp;
1919: if ($symbparm) {
1920: $symbp=$symbparm;
1921: } else {
1922: $symbp=&symbread();
1923: }
1924: my $mapp=(split(/\_\_\_/,$symbp))[0];
1925:
1926: my $symbparm=$symbp.'.'.$spacequalifierrest;
1927: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1928:
1929: my $seclevel=
1930: $ENV{'request.course.id'}.'.['.
1931: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1932: my $seclevelr=
1933: $ENV{'request.course.id'}.'.['.
1934: $ENV{'request.course.sec'}.'].'.$symbparm;
1935: my $seclevelm=
1936: $ENV{'request.course.id'}.'.['.
1937: $ENV{'request.course.sec'}.'].'.$mapparm;
1938:
1939: my $courselevel=
1940: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1941: my $courselevelr=
1942: $ENV{'request.course.id'}.'.'.$symbparm;
1943: my $courselevelm=
1944: $ENV{'request.course.id'}.'.'.$mapparm;
1945:
1946: # ----------------------------------------------------------- first, check user
1947: my %resourcedata=get('resourcedata',
1948: [$courselevelr,$courselevelm,$courselevel]);
1949: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1950: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1951:
1952: if ($resourcedata{$courselevelr}) {
1953: return $resourcedata{$courselevelr}; }
1954: if ($resourcedata{$courselevelm}) {
1955: return $resourcedata{$courselevelm}; }
1956: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1957:
1958: } else {
1959: if ($resourcedata{$courselevelr}!~/No such file/) {
1960: &logthis("<font color=blue>WARNING:".
1961: " Trying to get resource data for ".$ENV{'user.name'}." at "
1962: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1963: "</font>");
1964: }
1965: }
1966:
1967: # -------------------------------------------------------- second, check course
1968:
1969: my $reply=&reply('get:'.
1970: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1971: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1972: ':resourcedata:'.
1973: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1974: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1975: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1976: if ($reply!~/^error\:/) {
1977: map {
1978: if ($_) { return &unescape($_); }
1979: } split(/\&/,$reply);
1980: }
1981: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1982: &logthis("<font color=blue>WARNING:".
1983: " Getting ".$reply." asking for ".$varname." for ".
1984: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1985: ' at '.
1986: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1987: ' from '.
1988: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1989: "</font>");
1990: }
1991: # ------------------------------------------------------ third, check map parms
1992: my %parmhash=();
1993: my $thisparm='';
1994: if (tie(%parmhash,'GDBM_File',
1995: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1996: $thisparm=$parmhash{$symbparm};
1997: untie(%parmhash);
1998: }
1999: if ($thisparm) { return $thisparm; }
2000: }
2001:
2002: # --------------------------------------------- last, look in resource metadata
2003:
2004: $spacequalifierrest=~s/\./\_/;
2005: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2006: if ($metadata) { return $metadata; }
2007: $metadata=&metadata($ENV{'request.filename'},
2008: 'parameter_'.$spacequalifierrest);
2009: if ($metadata) { return $metadata; }
2010:
2011: # ------------------------------------------------------------------ Cascade up
2012:
2013: unless ($space eq '0') {
2014: my ($part,$id)=split(/\_/,$space);
2015: if ($id) {
2016: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2017: $symbparm);
2018: if ($partgeneral) { return $partgeneral; }
2019: } else {
2020: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2021: $symbparm);
2022: if ($resourcegeneral) { return $resourcegeneral; }
2023: }
2024: }
2025:
2026: # ---------------------------------------------------- Any other user namespace
2027: } elsif ($realm eq 'environment') {
2028: # ----------------------------------------------------------------- environment
2029: return $ENV{'environment.'.$spacequalifierrest};
2030: } elsif ($realm eq 'system') {
2031: # ----------------------------------------------------------------- system.time
2032: if ($space eq 'time') {
2033: return time;
2034: }
2035: }
2036: return '';
2037: }
2038:
2039: # ---------------------------------------------------------------- Get metadata
2040:
2041: sub metadata {
2042: my ($uri,$what)=@_;
2043:
2044: $uri=&declutter($uri);
2045: my $filename=$uri;
2046: $uri=~s/\.meta$//;
2047: unless ($metacache{$uri.':keys'}) {
2048: my %metathesekeys=();
2049: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2050: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2051: my $parser=HTML::TokeParser->new(\$metastring);
2052: my $token;
2053: undef %metathesekeys;
2054: while ($token=$parser->get_token) {
2055: if ($token->[0] eq 'S') {
2056: if (defined($token->[2]->{'package'})) {
2057: my $package=$token->[2]->{'package'};
2058: my $keyroot='';
2059: if (defined($token->[2]->{'part'})) {
2060: $keyroot.='_'.$token->[2]->{'part'};
2061: }
2062: if (defined($token->[2]->{'id'})) {
2063: $keyroot.='_'.$token->[2]->{'id'};
2064: }
2065: if ($metacache{$uri.':packages'}) {
2066: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2067: } else {
2068: $metacache{$uri.':packages'}=$package.$keyroot;
2069: }
2070: map {
2071: if ($_=~/^$package\&/) {
2072: my ($pack,$name,$subp)=split(/\&/,$_);
2073: my $value=$packagetab{$_};
2074: my $part=$keyroot;
2075: $part=~s/^\_//;
2076: if ($subp eq 'display') {
2077: $value.=' [Part: '.$part.']';
2078: }
2079: my $unikey='parameter'.$keyroot.'_'.$name;
2080: $metathesekeys{$unikey}=1;
2081: $metacache{$uri.':'.$unikey.'.part'}=$part;
2082: unless
2083: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2084: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2085: }
2086: }
2087: } keys %packagetab;
2088: } else {
2089: my $entry=$token->[1];
2090: my $unikey=$entry;
2091: if (defined($token->[2]->{'part'})) {
2092: $unikey.='_'.$token->[2]->{'part'};
2093: }
2094: if (defined($token->[2]->{'id'})) {
2095: $unikey.='_'.$token->[2]->{'id'};
2096: }
2097: if (defined($token->[2]->{'name'})) {
2098: $unikey.='_'.$token->[2]->{'name'};
2099: }
2100: $metathesekeys{$unikey}=1;
2101: map {
2102: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2103: } @{$token->[3]};
2104: unless (
2105: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2106: ) { $metacache{$uri.':'.$unikey}=
2107: $metacache{$uri.':'.$unikey.'.default'};
2108: }
2109: }
2110: }
2111: }
2112: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2113: }
2114: return $metacache{$uri.':'.$what};
2115: }
2116:
2117: # ------------------------------------------------- Update symbolic store links
2118:
2119: sub symblist {
2120: my ($mapname,%newhash)=@_;
2121: $mapname=declutter($mapname);
2122: my %hash;
2123: if (($ENV{'request.course.fn'}) && (%newhash)) {
2124: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2125: &GDBM_WRCREAT,0640)) {
2126: map {
2127: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2128: } keys %newhash;
2129: if (untie(%hash)) {
2130: return 'ok';
2131: }
2132: }
2133: }
2134: return 'error';
2135: }
2136:
2137: # ------------------------------------------------------ Return symb list entry
2138:
2139: sub symbread {
2140: my $thisfn=shift;
2141: unless ($thisfn) {
2142: $thisfn=$ENV{'request.filename'};
2143: }
2144: $thisfn=declutter($thisfn);
2145: my %hash;
2146: my %bighash;
2147: my $syval='';
2148: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2149: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2150: &GDBM_READER,0640)) {
2151: $syval=$hash{$thisfn};
2152: untie(%hash);
2153: }
2154: # ---------------------------------------------------------- There was an entry
2155: if ($syval) {
2156: unless ($syval=~/\_\d+$/) {
2157: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2158: &appenv('request.ambiguous' => $thisfn);
2159: return '';
2160: }
2161: $syval.=$1;
2162: }
2163: } else {
2164: # ------------------------------------------------------- Was not in symb table
2165: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2166: &GDBM_READER,0640)) {
2167: # ---------------------------------------------- Get ID(s) for current resource
2168: my $ids=$bighash{'ids_/res/'.$thisfn};
2169: unless ($ids) {
2170: $ids=$bighash{'ids_/'.$thisfn};
2171: }
2172: if ($ids) {
2173: # ------------------------------------------------------------------- Has ID(s)
2174: my @possibilities=split(/\,/,$ids);
2175: if ($#possibilities==0) {
2176: # ----------------------------------------------- There is only one possibility
2177: my ($mapid,$resid)=split(/\./,$ids);
2178: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2179: } else {
2180: # ------------------------------------------ There is more than one possibility
2181: my $realpossible=0;
2182: map {
2183: my $file=$bighash{'src_'.$_};
2184: if (&allowed('bre',$file)) {
2185: my ($mapid,$resid)=split(/\./,$_);
2186: if ($bighash{'map_type_'.$mapid} ne 'page') {
2187: $realpossible++;
2188: $syval=declutter($bighash{'map_id_'.$mapid}).
2189: '___'.$resid;
2190: }
2191: }
2192: } @possibilities;
2193: if ($realpossible!=1) { $syval=''; }
2194: }
2195: }
2196: untie(%bighash)
2197: }
2198: }
2199: if ($syval) {
2200: return $syval.'___'.$thisfn;
2201: }
2202: }
2203: &appenv('request.ambiguous' => $thisfn);
2204: return '';
2205: }
2206:
2207: # ---------------------------------------------------------- Return random seed
2208:
2209: sub numval {
2210: my $txt=shift;
2211: $txt=~tr/A-J/0-9/;
2212: $txt=~tr/a-j/0-9/;
2213: $txt=~tr/K-T/0-9/;
2214: $txt=~tr/k-t/0-9/;
2215: $txt=~tr/U-Z/0-5/;
2216: $txt=~tr/u-z/0-5/;
2217: $txt=~s/\D//g;
2218: return int($txt);
2219: }
2220:
2221: sub rndseed {
2222: my ($symb,$courseid,$domain,$username)=@_;
2223: if (!$symb) {
2224: unless ($symb=&symbread()) { return time; }
2225: }
2226: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2227: if (!$domain) {$domain=$ENV{'user.domain'};}
2228: if (!$username) {$username=$ENV{'user.name'};}
2229: {
2230: use integer;
2231: my $symbchck=unpack("%32C*",$symb) << 27;
2232: my $symbseed=numval($symb) << 22;
2233: my $namechck=unpack("%32C*",$username) << 17;
2234: my $nameseed=numval($username) << 12;
2235: my $domainseed=unpack("%32C*",$domain) << 7;
2236: my $courseseed=unpack("%32C*",$courseid);
2237: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2238: #uncommenting these lines can break things!
2239: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2240: #&Apache::lonxml::debug("rndseed :$num:$symb");
2241: return $num;
2242: }
2243: }
2244:
2245: sub ireceipt {
2246: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2247: my $cuname=unpack("%32C*",$funame);
2248: my $cudom=unpack("%32C*",$fudom);
2249: my $cucourseid=unpack("%32C*",$fucourseid);
2250: my $cusymb=unpack("%32C*",$fusymb);
2251: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2252: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2253: ($cunique%$cuname+
2254: $cunique%$cudom+
2255: $cusymb%$cuname+
2256: $cusymb%$cudom+
2257: $cucourseid%$cuname+
2258: $cucourseid%$cudom);
2259: }
2260:
2261: sub receipt {
2262: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2263: $ENV{'request.course.id'},&symbread());
2264: }
2265:
2266: # ------------------------------------------------------------ Serves up a file
2267: # returns either the contents of the file or a -1
2268: sub getfile {
2269: my $file=shift;
2270: &repcopy($file);
2271: if (! -e $file ) { return -1; };
2272: my $fh=Apache::File->new($file);
2273: my $a='';
2274: while (<$fh>) { $a .=$_; }
2275: return $a
2276: }
2277:
2278: sub filelocation {
2279: my ($dir,$file) = @_;
2280: my $location;
2281: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2282: if ($file=~m:^/~:) { # is a contruction space reference
2283: $location = $file;
2284: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2285: } else {
2286: $file=~s/^$perlvar{'lonDocRoot'}//;
2287: $file=~s:^/*res::;
2288: if ( !( $file =~ m:^/:) ) {
2289: $location = $dir. '/'.$file;
2290: } else {
2291: $location = '/home/httpd/html/res'.$file;
2292: }
2293: }
2294: $location=~s://+:/:g; # remove duplicate /
2295: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2296: return $location;
2297: }
2298:
2299: sub hreflocation {
2300: my ($dir,$file)=@_;
2301: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2302: my $finalpath=filelocation($dir,$file);
2303: $finalpath=~s/^\/home\/httpd\/html//;
2304: return $finalpath;
2305: } else {
2306: return $file;
2307: }
2308: }
2309:
2310: # ------------------------------------------------------------- Declutters URLs
2311:
2312: sub declutter {
2313: my $thisfn=shift;
2314: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2315: $thisfn=~s/^\///;
2316: $thisfn=~s/^res\///;
2317: return $thisfn;
2318: }
2319:
2320: # -------------------------------------------------------- Escape Special Chars
2321:
2322: sub escape {
2323: my $str=shift;
2324: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2325: return $str;
2326: }
2327:
2328: # ----------------------------------------------------- Un-Escape Special Chars
2329:
2330: sub unescape {
2331: my $str=shift;
2332: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2333: return $str;
2334: }
2335:
2336: # ================================================================ Main Program
2337:
2338: sub BEGIN {
2339: unless ($readit) {
2340: # ------------------------------------------------------------ Read access.conf
2341: {
2342: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2343:
2344: while (my $configline=<$config>) {
2345: if ($configline =~ /PerlSetVar/) {
2346: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2347: chomp($varvalue);
2348: $perlvar{$varname}=$varvalue;
2349: }
2350: }
2351: }
2352:
2353: # ------------------------------------------------------------- Read hosts file
2354: {
2355: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2356:
2357: while (my $configline=<$config>) {
2358: chomp($configline);
2359: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2360: $hostname{$id}=$name;
2361: $hostdom{$id}=$domain;
2362: $hostip{$id}=$ip;
2363: if ($role eq 'library') { $libserv{$id}=$name; }
2364: }
2365: }
2366:
2367: # ------------------------------------------------------ Read spare server file
2368: {
2369: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2370:
2371: while (my $configline=<$config>) {
2372: chomp($configline);
2373: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2374: $spareid{$configline}=1;
2375: }
2376: }
2377: }
2378: # ------------------------------------------------------------ Read permissions
2379: {
2380: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2381:
2382: while (my $configline=<$config>) {
2383: chomp($configline);
2384: if ($configline) {
2385: my ($role,$perm)=split(/ /,$configline);
2386: if ($perm ne '') { $pr{$role}=$perm; }
2387: }
2388: }
2389: }
2390:
2391: # -------------------------------------------- Read plain texts for permissions
2392: {
2393: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2394:
2395: while (my $configline=<$config>) {
2396: chomp($configline);
2397: if ($configline) {
2398: my ($short,$plain)=split(/:/,$configline);
2399: if ($plain ne '') { $prp{$short}=$plain; }
2400: }
2401: }
2402: }
2403:
2404: # ---------------------------------------------------------- Read package table
2405: {
2406: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2407:
2408: while (my $configline=<$config>) {
2409: chomp($configline);
2410: my ($short,$plain)=split(/:/,$configline);
2411: my ($pack,$name)=split(/\&/,$short);
2412: if ($plain ne '') {
2413: $packagetab{$pack.'&'.$name.'&name'}=$name;
2414: $packagetab{$short}=$plain;
2415: }
2416: }
2417: }
2418:
2419: # ------------------------------------------------------------- Read file types
2420: {
2421: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2422:
2423: while (my $configline=<$config>) {
2424: chomp($configline);
2425: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2426: if ($descr[0] ne '') {
2427: $fe{$ending}=$emb;
2428: $fd{$ending}=join(' ',@descr);
2429: }
2430: }
2431: }
2432:
2433: %metacache=();
2434:
2435: $readit='done';
2436: &logtouch();
2437: &logthis('<font color=yellow>INFO: Read configuration</font>');
2438: }
2439: }
2440: 1;
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