1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
5: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
6: # 11/8,11/16,11/18,11/22,11/23,12/22,
7: # 01/06,01/13,02/24,02/28,02/29,
8: # 03/01,03/02,03/06,03/07,03/13,
9: # 04/05,05/29,05/31,06/01,
10: # 06/05,06/26 Gerd Kortemeyer
11: # 06/26 Ben Tyszka
12: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
13: # 08/14 Ben Tyszka
14: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
15: # 10/04 Gerd Kortemeyer
16: # 10/04 Guy Albertelli
17: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
18: # 10/30,10/31,
19: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
20: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
21: # 05/01/01 Guy Albertelli
22: # 05/01,06/01,09/01 Gerd Kortemeyer
23: # 09/01 Guy Albertelli
24: # 09/01,10/01,11/01 Gerd Kortemeyer
25: # YEAR=2001
26: # 02/27/01 Scott Harrison
27: # 3/2 Gerd Kortemeyer
28: # 3/15,3/19 Scott Harrison
29: # 3/19,3/20 Gerd Kortemeyer
30: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
31: # 5/26,5/28 Gerd Kortemeyer
32: # 5/30 H. K. Ng
33: # 6/1 Gerd Kortemeyer
34: # July Guy Albertelli
35: # 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,
36: # 10/2 Gerd Kortemeyer
37: # 10/5,10/10,11/13,11/15 Scott Harrison
38: # 11/17,11/20 Gerd Kortemeyer
39: #
40: # $Id: lonnet.pm,v 1.175 2001/11/20 22:40:53 www Exp $
41: #
42: ###
43:
44: # Functions for use by content handlers:
45: #
46: # metadata_query(sql-query-string,custom-metadata-regex) :
47: # returns file handle of where sql and
48: # regex results will be stored for query
49: # plaintext(short) : plain text explanation of short term
50: # fileembstyle(ext) : embed style in page for file extension
51: # filedescription(ext) : descriptor text for file extension
52: # allowed(short,url) : returns codes for allowed actions
53: # F: full access
54: # U,I,K: authentication modes (cxx only)
55: # '': forbidden
56: # 1: user needs to choose course
57: # 2: browse allowed
58: # definerole(rolename,sys,dom,cou) : define a custom role rolename
59: # set privileges in format of lonTabs/roles.tab for
60: # system, domain and course level,
61: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
62: # level given by url. Optional start and end dates
63: # (leave empty string or zero for "no date")
64: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
65: # custom role to a user for the level given by url.
66: # Specify name and domain of role author, and role name
67: # revokerole (udom,uname,url,role) : Revoke a role for url
68: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
69: # appenv(hash) : adds hash to session environment
70: # delenv(varname) : deletes all environment entries starting with varname
71: # store(hashref,symb,courseid,udom,uname)
72: # : stores hash permanently for this url
73: # hashref needs to be given, and should be a \%hashname
74: # the remaining args aren't required and if they aren't
75: # passed or are '' they will be derived from the ENV
76: # cstore(hashref,symb,courseid,udom,uname)
77: # : same as store but uses the critical interface to
78: # guarentee a store
79: # restore(symb,courseid,udom,uname)
80: # : returns hash for this symb, all args are optional
81: # if they aren't given they will be derived from the
82: # current enviroment
83: #
84: #
85: # for the next 6 functions udom and uname are optional
86: # if supplied they use udom as the domain and uname
87: # as the username for the function (supply a courseid
88: # for the uname if you want a course database)
89: # if not supplied it uses %ENV and looks at
90: # user. attribute for the values
91: #
92: # eget(namesp,arrayref,udom,uname)
93: # : returns hash with keys from array reference filled
94: # in from namesp (encrypts the return communication)
95: # get(namesp,arrayref,udom,uname)
96: # : returns hash with keys from array reference filled
97: # in from namesp
98: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
99: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
100: # put(namesp,hash,udom,uname) : stores hash in namesp
101: # cput(namesp,hash,udom,uname) : critical put
102: #
103: #
104: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
105: # hash
106: # coursedescription(id) : returns and caches course description for id
107: # repcopy(filename) : replicate file
108: # dirlist(url) : gets a directory listing
109: # directcondval(index) : reading condition value of single condition from
110: # state string
111: # condval(index) : value of condition index based on state
112: # EXT(name) : value of a variable
113: # symblist(map,hash) : Updates symbolic storage links
114: # symbread([filename]) : returns the data handle (filename optional)
115: # rndseed([symb,courseid,domain,uname])
116: # : returns a random seed, all arguments are optional,
117: # if they aren't sent it use the environment to derive
118: # them
119: # Note: if symb isn't sent and it can't get one from
120: # &symbread it will use the current time as it's return
121: # receipt() : returns a receipt to be given out to users
122: # getfile(filename) : returns the contents of filename, or a -1 if it can't
123: # be found, replicates and subscribes to the file
124: # filelocation(dir,file) : returns a fairly clean absolute reference to file
125: # from the directory dir
126: # hreflocation(dir,file) : same as filelocation, but for hrefs
127: # log(domain,user,home,msg) : write to permanent log for user
128: # usection(domain,user,courseid) : output of section name/number or '' for
129: # "not in course" and '-1' for "no section"
130: # userenvironment(domain,user,what) : puts out any environment parameter
131: # for a user
132: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
133: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
134: # an array of IDs
135: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
136: # an array of names
137: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
138: # returns a comma separated list of keys
139: #
140:
141: package Apache::lonnet;
142:
143: use strict;
144: use Apache::File;
145: use LWP::UserAgent();
146: use HTTP::Headers;
147: use vars
148: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab %courselogs);
149: use IO::Socket;
150: use GDBM_File;
151: use Apache::Constants qw(:common :http);
152: use HTML::TokeParser;
153: use Fcntl qw(:flock);
154:
155: # --------------------------------------------------------------------- Logging
156:
157: sub logtouch {
158: my $execdir=$perlvar{'lonDaemons'};
159: unless (-e "$execdir/logs/lonnet.log") {
160: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
161: close $fh;
162: }
163: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
164: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
165: }
166:
167: sub logthis {
168: my $message=shift;
169: my $execdir=$perlvar{'lonDaemons'};
170: my $now=time;
171: my $local=localtime($now);
172: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
173: print $fh "$local ($$): $message\n";
174: return 1;
175: }
176:
177: sub logperm {
178: my $message=shift;
179: my $execdir=$perlvar{'lonDaemons'};
180: my $now=time;
181: my $local=localtime($now);
182: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
183: print $fh "$now:$message:$local\n";
184: return 1;
185: }
186:
187: # -------------------------------------------------- Non-critical communication
188: sub subreply {
189: my ($cmd,$server)=@_;
190: my $peerfile="$perlvar{'lonSockDir'}/$server";
191: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
192: Type => SOCK_STREAM,
193: Timeout => 10)
194: or return "con_lost";
195: print $client "$cmd\n";
196: my $answer=<$client>;
197: if (!$answer) { $answer="con_lost"; }
198: chomp($answer);
199: return $answer;
200: }
201:
202: sub reply {
203: my ($cmd,$server)=@_;
204: my $answer=subreply($cmd,$server);
205: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
206: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
207: &logthis("<font color=blue>WARNING:".
208: " $cmd to $server returned $answer</font>");
209: }
210: return $answer;
211: }
212:
213: # ----------------------------------------------------------- Send USR1 to lonc
214:
215: sub reconlonc {
216: my $peerfile=shift;
217: &logthis("Trying to reconnect for $peerfile");
218: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
219: if (my $fh=Apache::File->new("$loncfile")) {
220: my $loncpid=<$fh>;
221: chomp($loncpid);
222: if (kill 0 => $loncpid) {
223: &logthis("lonc at pid $loncpid responding, sending USR1");
224: kill USR1 => $loncpid;
225: sleep 1;
226: if (-e "$peerfile") { return; }
227: &logthis("$peerfile still not there, give it another try");
228: sleep 5;
229: if (-e "$peerfile") { return; }
230: &logthis(
231: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
232: } else {
233: &logthis(
234: "<font color=blue>WARNING:".
235: " lonc at pid $loncpid not responding, giving up</font>");
236: }
237: } else {
238: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
239: }
240: }
241:
242: # ------------------------------------------------------ Critical communication
243:
244: sub critical {
245: my ($cmd,$server)=@_;
246: unless ($hostname{$server}) {
247: &logthis("<font color=blue>WARNING:".
248: " Critical message to unknown server ($server)</font>");
249: return 'no_such_host';
250: }
251: my $answer=reply($cmd,$server);
252: if ($answer eq 'con_lost') {
253: my $pingreply=reply('ping',$server);
254: &reconlonc("$perlvar{'lonSockDir'}/$server");
255: my $pongreply=reply('pong',$server);
256: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
257: $answer=reply($cmd,$server);
258: if ($answer eq 'con_lost') {
259: my $now=time;
260: my $middlename=$cmd;
261: $middlename=substr($middlename,0,16);
262: $middlename=~s/\W//g;
263: my $dfilename=
264: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
265: {
266: my $dfh;
267: if ($dfh=Apache::File->new(">$dfilename")) {
268: print $dfh "$cmd\n";
269: }
270: }
271: sleep 2;
272: my $wcmd='';
273: {
274: my $dfh;
275: if ($dfh=Apache::File->new("$dfilename")) {
276: $wcmd=<$dfh>;
277: }
278: }
279: chomp($wcmd);
280: if ($wcmd eq $cmd) {
281: &logthis("<font color=blue>WARNING: ".
282: "Connection buffer $dfilename: $cmd</font>");
283: &logperm("D:$server:$cmd");
284: return 'con_delayed';
285: } else {
286: &logthis("<font color=red>CRITICAL:"
287: ." Critical connection failed: $server $cmd</font>");
288: &logperm("F:$server:$cmd");
289: return 'con_failed';
290: }
291: }
292: }
293: return $answer;
294: }
295:
296: # ---------------------------------------------------------- Append Environment
297:
298: sub appenv {
299: my %newenv=@_;
300: map {
301: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
302: &logthis("<font color=blue>WARNING: ".
303: "Attempt to modify environment ".$_." to ".$newenv{$_}
304: .'</font>');
305: delete($newenv{$_});
306: } else {
307: $ENV{$_}=$newenv{$_};
308: }
309: } keys %newenv;
310:
311: my $lockfh;
312: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
313: return 'error: '.$!;
314: }
315: unless (flock($lockfh,LOCK_EX)) {
316: &logthis("<font color=blue>WARNING: ".
317: 'Could not obtain exclusive lock in appenv: '.$!);
318: $lockfh->close();
319: return 'error: '.$!;
320: }
321:
322: my @oldenv;
323: {
324: my $fh;
325: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: for (my $i=0; $i<=$#oldenv; $i++) {
332: chomp($oldenv[$i]);
333: if ($oldenv[$i] ne '') {
334: my ($name,$value)=split(/=/,$oldenv[$i]);
335: unless (defined($newenv{$name})) {
336: $newenv{$name}=$value;
337: }
338: }
339: }
340: {
341: my $fh;
342: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
343: return 'error';
344: }
345: my $newname;
346: foreach $newname (keys %newenv) {
347: print $fh "$newname=$newenv{$newname}\n";
348: }
349: $fh->close();
350: }
351:
352: $lockfh->close();
353: return 'ok';
354: }
355: # ----------------------------------------------------- Delete from Environment
356:
357: sub delenv {
358: my $delthis=shift;
359: my %newenv=();
360: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
361: &logthis("<font color=blue>WARNING: ".
362: "Attempt to delete from environment ".$delthis);
363: return 'error';
364: }
365: my @oldenv;
366: {
367: my $fh;
368: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
369: return 'error';
370: }
371: unless (flock($fh,LOCK_SH)) {
372: &logthis("<font color=blue>WARNING: ".
373: 'Could not obtain shared lock in delenv: '.$!);
374: $fh->close();
375: return 'error: '.$!;
376: }
377: @oldenv=<$fh>;
378: $fh->close();
379: }
380: {
381: my $fh;
382: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
383: return 'error';
384: }
385: unless (flock($fh,LOCK_EX)) {
386: &logthis("<font color=blue>WARNING: ".
387: 'Could not obtain exclusive lock in delenv: '.$!);
388: $fh->close();
389: return 'error: '.$!;
390: }
391: map {
392: unless ($_=~/^$delthis/) { print $fh $_; }
393: } @oldenv;
394: $fh->close();
395: }
396: return 'ok';
397: }
398:
399: # ------------------------------ Find server with least workload from spare.tab
400:
401: sub spareserver {
402: my $tryserver;
403: my $spareserver='';
404: my $lowestserver=100;
405: foreach $tryserver (keys %spareid) {
406: my $answer=reply('load',$tryserver);
407: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
408: $spareserver="http://$hostname{$tryserver}";
409: $lowestserver=$answer;
410: }
411: }
412: return $spareserver;
413: }
414:
415: # ----------------------- Try to determine user's current authentication scheme
416:
417: sub queryauthenticate {
418: my ($uname,$udom)=@_;
419: if (($perlvar{'lonRole'} eq 'library') &&
420: ($udom eq $perlvar{'lonDefDomain'})) {
421: my $answer=reply("encrypt:currentauth:$udom:$uname",
422: $perlvar{'lonHostID'});
423: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
424: if (length($answer)) {
425: return $answer;
426: }
427: else {
428: &logthis("User $uname at $udom lacks an authentication mechanism");
429: return 'no_host';
430: }
431: }
432: }
433:
434: my $tryserver;
435: foreach $tryserver (keys %libserv) {
436: if ($hostdom{$tryserver} eq $udom) {
437: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
438: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
439: if (length($answer)) {
440: return $answer;
441: }
442: else {
443: &logthis("User $uname at $udom lacks an authentication mechanism");
444: return 'no_host';
445: }
446: }
447: }
448: }
449: &logthis("User $uname at $udom lacks an authentication mechanism");
450: return 'no_host';
451: }
452:
453: # --------- Try to authenticate user from domain's lib servers (first this one)
454:
455: sub authenticate {
456: my ($uname,$upass,$udom)=@_;
457: $upass=escape($upass);
458: if (($perlvar{'lonRole'} eq 'library') &&
459: ($udom eq $perlvar{'lonDefDomain'})) {
460: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
461: if ($answer =~ /authorized/) {
462: if ($answer eq 'authorized') {
463: &logthis("User $uname at $udom authorized by local server");
464: return $perlvar{'lonHostID'};
465: }
466: if ($answer eq 'non_authorized') {
467: &logthis("User $uname at $udom rejected by local server");
468: return 'no_host';
469: }
470: }
471: }
472:
473: my $tryserver;
474: foreach $tryserver (keys %libserv) {
475: if ($hostdom{$tryserver} eq $udom) {
476: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
477: if ($answer =~ /authorized/) {
478: if ($answer eq 'authorized') {
479: &logthis("User $uname at $udom authorized by $tryserver");
480: return $tryserver;
481: }
482: if ($answer eq 'non_authorized') {
483: &logthis("User $uname at $udom rejected by $tryserver");
484: return 'no_host';
485: }
486: }
487: }
488: }
489: &logthis("User $uname at $udom could not be authenticated");
490: return 'no_host';
491: }
492:
493: # ---------------------- Find the homebase for a user from domain's lib servers
494:
495: sub homeserver {
496: my ($uname,$udom)=@_;
497:
498: my $index="$uname:$udom";
499: if ($homecache{$index}) { return "$homecache{$index}"; }
500:
501: my $tryserver;
502: foreach $tryserver (keys %libserv) {
503: if ($hostdom{$tryserver} eq $udom) {
504: my $answer=reply("home:$udom:$uname",$tryserver);
505: if ($answer eq 'found') {
506: $homecache{$index}=$tryserver;
507: return $tryserver;
508: }
509: }
510: }
511: return 'no_host';
512: }
513:
514: # ------------------------------------- Find the usernames behind a list of IDs
515:
516: sub idget {
517: my ($udom,@ids)=@_;
518: my %returnhash=();
519:
520: my $tryserver;
521: foreach $tryserver (keys %libserv) {
522: if ($hostdom{$tryserver} eq $udom) {
523: my $idlist=join('&',@ids);
524: $idlist=~tr/A-Z/a-z/;
525: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
526: my @answer=();
527: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
528: @answer=split(/\&/,$reply);
529: } ;
530: my $i;
531: for ($i=0;$i<=$#ids;$i++) {
532: if ($answer[$i]) {
533: $returnhash{$ids[$i]}=$answer[$i];
534: }
535: }
536: }
537: }
538: return %returnhash;
539: }
540:
541: # ------------------------------------- Find the IDs behind a list of usernames
542:
543: sub idrget {
544: my ($udom,@unames)=@_;
545: my %returnhash=();
546: map {
547: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
548: } @unames;
549: return %returnhash;
550: }
551:
552: # ------------------------------- Store away a list of names and associated IDs
553:
554: sub idput {
555: my ($udom,%ids)=@_;
556: my %servers=();
557: map {
558: my $uhom=&homeserver($_,$udom);
559: if ($uhom ne 'no_host') {
560: my $id=&escape($ids{$_});
561: $id=~tr/A-Z/a-z/;
562: my $unam=&escape($_);
563: if ($servers{$uhom}) {
564: $servers{$uhom}.='&'.$id.'='.$unam;
565: } else {
566: $servers{$uhom}=$id.'='.$unam;
567: }
568: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
569: }
570: } keys %ids;
571: map {
572: &critical('idput:'.$udom.':'.$servers{$_},$_);
573: } keys %servers;
574: }
575:
576: # ------------------------------------- Find the section of student in a course
577:
578: sub usection {
579: my ($udom,$unam,$courseid)=@_;
580: $courseid=~s/\_/\//g;
581: $courseid=~s/^(\w)/\/$1/;
582: map {
583: my ($key,$value)=split(/\=/,$_);
584: $key=&unescape($key);
585: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
586: my $section=$1;
587: if ($key eq $courseid.'_st') { $section=''; }
588: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
589: my $now=time;
590: my $notactive=0;
591: if ($start) {
592: if ($now<$start) { $notactive=1; }
593: }
594: if ($end) {
595: if ($now>$end) { $notactive=1; }
596: }
597: unless ($notactive) { return $section; }
598: }
599: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
600: &homeserver($unam,$udom)));
601: return '-1';
602: }
603:
604: # ------------------------------------- Read an entry from a user's environment
605:
606: sub userenvironment {
607: my ($udom,$unam,@what)=@_;
608: my %returnhash=();
609: my @answer=split(/\&/,
610: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
611: &homeserver($unam,$udom)));
612: my $i;
613: for ($i=0;$i<=$#what;$i++) {
614: $returnhash{$what[$i]}=&unescape($answer[$i]);
615: }
616: return %returnhash;
617: }
618:
619: # ----------------------------- Subscribe to a resource, return URL if possible
620:
621: sub subscribe {
622: my $fname=shift;
623: my $author=$fname;
624: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
625: my ($udom,$uname)=split(/\//,$author);
626: my $home=homeserver($uname,$udom);
627: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
628: return 'not_found';
629: }
630: my $answer=reply("sub:$fname",$home);
631: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
632: $answer.=' by '.$home;
633: }
634: return $answer;
635: }
636:
637: # -------------------------------------------------------------- Replicate file
638:
639: sub repcopy {
640: my $filename=shift;
641: $filename=~s/\/+/\//g;
642: my $transname="$filename.in.transfer";
643: if ((-e $filename) || (-e $transname)) { return OK; }
644: my $remoteurl=subscribe($filename);
645: if ($remoteurl =~ /^con_lost by/) {
646: &logthis("Subscribe returned $remoteurl: $filename");
647: return HTTP_SERVICE_UNAVAILABLE;
648: } elsif ($remoteurl eq 'not_found') {
649: &logthis("Subscribe returned not_found: $filename");
650: return HTTP_NOT_FOUND;
651: } elsif ($remoteurl =~ /^rejected by/) {
652: &logthis("Subscribe returned $remoteurl: $filename");
653: return FORBIDDEN;
654: } elsif ($remoteurl eq 'directory') {
655: return OK;
656: } else {
657: my @parts=split(/\//,$filename);
658: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
659: if ($path ne "$perlvar{'lonDocRoot'}/res") {
660: &logthis("Malconfiguration for replication: $filename");
661: return HTTP_BAD_REQUEST;
662: }
663: my $count;
664: for ($count=5;$count<$#parts;$count++) {
665: $path.="/$parts[$count]";
666: if ((-e $path)!=1) {
667: mkdir($path,0777);
668: }
669: }
670: my $ua=new LWP::UserAgent;
671: my $request=new HTTP::Request('GET',"$remoteurl");
672: my $response=$ua->request($request,$transname);
673: if ($response->is_error()) {
674: unlink($transname);
675: my $message=$response->status_line;
676: &logthis("<font color=blue>WARNING:"
677: ." LWP get: $message: $filename</font>");
678: return HTTP_SERVICE_UNAVAILABLE;
679: } else {
680: if ($remoteurl!~/\.meta$/) {
681: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
682: my $mresponse=$ua->request($mrequest,$filename.'.meta');
683: if ($mresponse->is_error()) {
684: unlink($filename.'.meta');
685: &logthis(
686: "<font color=yellow>INFO: No metadata: $filename</font>");
687: }
688: }
689: rename($transname,$filename);
690: return OK;
691: }
692: }
693: }
694:
695: # --------------------------------------------------------- Server Side Include
696:
697: sub ssi {
698:
699: my ($fn,%form)=@_;
700:
701: my $ua=new LWP::UserAgent;
702:
703: my $request;
704:
705: if (%form) {
706: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
707: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
708: } else {
709: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
710: }
711:
712: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
713: my $response=$ua->request($request);
714:
715: return $response->content;
716: }
717:
718: # ------------------------------------------------------------------------- Log
719:
720: sub log {
721: my ($dom,$nam,$hom,$what)=@_;
722: return critical("log:$dom:$nam:$what",$hom);
723: }
724:
725: # ------------------------------------------------------------------ Course Log
726:
727: sub flushcourselogs {
728: &logthis('Flushing course log buffers');
729: map {
730: my $crsid=$_;
731: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
732: $ENV{'course.'.$crsid.'.num'}.':'.
733: &escape($courselogs{$crsid}),
734: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
735: delete $courselogs{$crsid};
736: } else {
737: &logthis('Failed to flush log buffer for '.$crsid);
738: if (length($courselogs{$crsid})>40000) {
739: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
740: " exceeded maximum size, deleting.</font>");
741: delete $courselogs{$crsid};
742: }
743: }
744: } keys %courselogs;
745: }
746:
747: sub courselog {
748: my $what=shift;
749: $what=time.':'.$what;
750: unless ($ENV{'request.course.id'}) { return ''; }
751: if (defined $courselogs{$ENV{'request.course.id'}}) {
752: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
753: } else {
754: $courselogs{$ENV{'request.course.id'}}.=$what;
755: }
756: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
757: &flushcourselogs();
758: }
759: }
760:
761: sub courseacclog {
762: my $fnsymb=shift;
763: unless ($ENV{'request.course.id'}) { return ''; }
764: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
765: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
766: map {
767: if ($_=~/^form\.(.*)/) {
768: $what.=':'.$1.'='.$ENV{$_};
769: }
770: } keys %ENV;
771: }
772: &courselog($what);
773: }
774:
775: # ----------------------------------------------------------- Check out an item
776:
777: sub checkout {
778: my ($symb,$tuname,$tudom,$tcrsid)=@_;
779: my $now=time;
780: my $lonhost=$perlvar{'lonHostID'};
781: my $infostr=&escape(
782: $tuname.'&'.
783: $tudom.'&'.
784: $tcrsid.'&'.
785: $symb.'&'.
786: $now.'&'.$ENV{'REMOTE_ADDR'});
787: my $token=&reply('tmpput:'.$infostr,$lonhost);
788: if ($token=~/^error\:/) {
789: &logthis("<font color=blue>WARNING: ".
790: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
791: "</font>");
792: return '';
793: }
794:
795: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
796: $token=~tr/a-z/A-Z/;
797:
798: my %infohash=('resource.0.outtoken' => $token,
799: 'resource.0.checkouttime' => $now,
800: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
801:
802: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
803: return '';
804: } else {
805: &logthis("<font color=blue>WARNING: ".
806: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
807: "</font>");
808: }
809:
810: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
811: &escape('Checkout '.$infostr.' - '.
812: $token)) ne 'ok') {
813: return '';
814: } else {
815: &logthis("<font color=blue>WARNING: ".
816: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
817: "</font>");
818: }
819: return $token;
820: }
821:
822: # ------------------------------------------------------------ Check in an item
823:
824: sub checkin {
825: my $token=shift;
826: my $now=time;
827: my ($ta,$tb,$lonhost)=split(/\*/,$token);
828: $lonhost=~tr/A-Z/a-z/;
829: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
830: $dtoken=~s/\W/\_/g;
831: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
832: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
833:
834: unless (($tuname) && ($tudom)) {
835: &logthis('Check in '.$token.' ('.$dtoken.') failed');
836: return '';
837: }
838:
839: unless (&allowed('mgr',$tcrsid)) {
840: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
841: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
842: return '';
843: }
844:
845: my %infohash=('resource.0.intoken' => $token,
846: 'resource.0.checkintime' => $now,
847: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
848:
849: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
850: return '';
851: }
852:
853: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
854: &escape('Checkin - '.$token)) ne 'ok') {
855: return '';
856: }
857:
858: return ($symb,$tuname,$tudom,$tcrsid);
859: }
860:
861: # --------------------------------------------- Set Expire Date for Spreadsheet
862:
863: sub expirespread {
864: my ($uname,$udom,$stype,$usymb)=@_;
865: my $cid=$ENV{'request.course.id'};
866: if ($cid) {
867: my $now=time;
868: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
869: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
870: $ENV{'course.'.$cid.'.num'}.
871: ':nohist_expirationdates:'.
872: &escape($key).'='.$now,
873: $ENV{'course.'.$cid.'.home'})
874: }
875: return 'ok';
876: }
877:
878: # ----------------------------------------------------- Devalidate Spreadsheets
879:
880: sub devalidate {
881: my $symb=shift;
882: my $cid=$ENV{'request.course.id'};
883: if ($cid) {
884: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
885: my $status=
886: &del('nohist_calculatedsheet',
887: [$key.'studentcalc'],
888: $ENV{'course.'.$cid.'.domain'},
889: $ENV{'course.'.$cid.'.num'})
890: .' '.
891: &del('nohist_calculatedsheets_'.$cid,
892: [$key.'assesscalc:'.$symb]);
893: unless ($status eq 'ok ok') {
894: &logthis('Could not devalidate spreadsheet '.
895: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
896: $symb.': '.$status);
897: }
898: }
899: }
900:
901: sub hash2str {
902: my (%hash)=@_;
903: my $result='';
904: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
905: $result=~s/\&$//;
906: return $result;
907: }
908:
909: sub str2hash {
910: my ($string) = @_;
911: my %returnhash;
912: map {
913: my ($name,$value)=split(/\=/,$_);
914: $returnhash{&unescape($name)}=&unescape($value);
915: } split(/\&/,$string);
916: return %returnhash;
917: }
918:
919: # -------------------------------------------------------------------Temp Store
920:
921: sub tmpreset {
922: my ($symb,$namespace,$domain,$stuname) = @_;
923: if (!$symb) {
924: $symb=&symbread();
925: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
926: }
927: $symb=escape($symb);
928:
929: if (!$namespace) { $namespace=$ENV{'request.state'}; }
930: $namespace=~s/\//\_/g;
931: $namespace=~s/\W//g;
932:
933: #FIXME needs to do something for /pub resources
934: if (!$domain) { $domain=$ENV{'user.domain'}; }
935: if (!$stuname) { $stuname=$ENV{'user.name'}; }
936: my $path=$perlvar{'lonDaemons'}.'/tmp';
937: my %hash;
938: if (tie(%hash,'GDBM_File',
939: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
940: &GDBM_WRCREAT,0640)) {
941: foreach my $key (keys %hash) {
942: if ($key=~ /:$symb:/) {
943: delete($hash{$key});
944: }
945: }
946: }
947: }
948:
949: sub tmpstore {
950: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
951:
952: if (!$symb) {
953: $symb=&symbread();
954: if (!$symb) { $symb= $ENV{'request.url'}; }
955: }
956: $symb=escape($symb);
957:
958: if (!$namespace) {
959: # I don't think we would ever want to store this for a course.
960: # it seems this will only be used if we don't have a course.
961: #$namespace=$ENV{'request.course.id'};
962: #if (!$namespace) {
963: $namespace=$ENV{'request.state'};
964: #}
965: }
966: $namespace=~s/\//\_/g;
967: $namespace=~s/\W//g;
968: #FIXME needs to do something for /pub resources
969: if (!$domain) { $domain=$ENV{'user.domain'}; }
970: if (!$stuname) { $stuname=$ENV{'user.name'}; }
971: my $now=time;
972: my %hash;
973: my $path=$perlvar{'lonDaemons'}.'/tmp';
974: if (tie(%hash,'GDBM_File',
975: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
976: &GDBM_WRCREAT,0640)) {
977: $hash{"version:$symb"}++;
978: my $version=$hash{"version:$symb"};
979: my $allkeys='';
980: foreach my $key (keys(%$storehash)) {
981: $allkeys.=$key.':';
982: $hash{"$version:$symb:$key"}=$$storehash{$key};
983: }
984: $hash{"$version:$symb:timestamp"}=$now;
985: $allkeys.='timestamp';
986: $hash{"$version:keys:$symb"}=$allkeys;
987: if (untie(%hash)) {
988: return 'ok';
989: } else {
990: return "error:$!";
991: }
992: } else {
993: return "error:$!";
994: }
995: }
996:
997: # -----------------------------------------------------------------Temp Restore
998:
999: sub tmprestore {
1000: my ($symb,$namespace,$domain,$stuname) = @_;
1001:
1002: if (!$symb) {
1003: $symb=&symbread();
1004: if (!$symb) { $symb= $ENV{'request.url'}; }
1005: }
1006: $symb=escape($symb);
1007:
1008: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1009: #FIXME needs to do something for /pub resources
1010: if (!$domain) { $domain=$ENV{'user.domain'}; }
1011: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1012:
1013: my %returnhash;
1014: $namespace=~s/\//\_/g;
1015: $namespace=~s/\W//g;
1016: my %hash;
1017: my $path=$perlvar{'lonDaemons'}.'/tmp';
1018: if (tie(%hash,'GDBM_File',
1019: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1020: &GDBM_READER,0640)) {
1021: my $version=$hash{"version:$symb"};
1022: $returnhash{'version'}=$version;
1023: my $scope;
1024: for ($scope=1;$scope<=$version;$scope++) {
1025: my $vkeys=$hash{"$scope:keys:$symb"};
1026: my @keys=split(/:/,$vkeys);
1027: my $key;
1028: $returnhash{"$scope:keys"}=$vkeys;
1029: foreach $key (@keys) {
1030: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1031: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1032: }
1033: }
1034: if (!(untie(%hash))) {
1035: return "error:$!";
1036: }
1037: } else {
1038: return "error:$!";
1039: }
1040: return %returnhash;
1041: }
1042:
1043: # ----------------------------------------------------------------------- Store
1044:
1045: sub store {
1046: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1047: my $home='';
1048:
1049: if ($stuname) { $home=&homeserver($stuname,$domain); }
1050:
1051: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1052:
1053: &devalidate($symb);
1054:
1055: $symb=escape($symb);
1056: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1057: if (!$domain) { $domain=$ENV{'user.domain'}; }
1058: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1059: if (!$home) { $home=$ENV{'user.home'}; }
1060: my $namevalue='';
1061: map {
1062: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1063: } keys %$storehash;
1064: $namevalue=~s/\&$//;
1065: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1066: }
1067:
1068: # -------------------------------------------------------------- Critical Store
1069:
1070: sub cstore {
1071: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1072: my $home='';
1073:
1074: if ($stuname) { $home=&homeserver($stuname,$domain); }
1075:
1076: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1077:
1078: &devalidate($symb);
1079:
1080: $symb=escape($symb);
1081: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1082: if (!$domain) { $domain=$ENV{'user.domain'}; }
1083: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1084: if (!$home) { $home=$ENV{'user.home'}; }
1085:
1086: my $namevalue='';
1087: map {
1088: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1089: } keys %$storehash;
1090: $namevalue=~s/\&$//;
1091: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1092: }
1093:
1094: # --------------------------------------------------------------------- Restore
1095:
1096: sub restore {
1097: my ($symb,$namespace,$domain,$stuname) = @_;
1098: my $home='';
1099:
1100: if ($stuname) { $home=&homeserver($stuname,$domain); }
1101:
1102: if (!$symb) {
1103: unless ($symb=escape(&symbread())) { return ''; }
1104: } else {
1105: $symb=&escape($symb);
1106: }
1107: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1108: if (!$domain) { $domain=$ENV{'user.domain'}; }
1109: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1110: if (!$home) { $home=$ENV{'user.home'}; }
1111: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1112:
1113: my %returnhash=();
1114: map {
1115: my ($name,$value)=split(/\=/,$_);
1116: $returnhash{&unescape($name)}=&unescape($value);
1117: } split(/\&/,$answer);
1118: my $version;
1119: for ($version=1;$version<=$returnhash{'version'};$version++) {
1120: map {
1121: $returnhash{$_}=$returnhash{$version.':'.$_};
1122: } split(/\:/,$returnhash{$version.':keys'});
1123: }
1124: return %returnhash;
1125: }
1126:
1127: # ---------------------------------------------------------- Course Description
1128:
1129: sub coursedescription {
1130: my $courseid=shift;
1131: $courseid=~s/^\///;
1132: $courseid=~s/\_/\//g;
1133: my ($cdomain,$cnum)=split(/\//,$courseid);
1134: my $chome=&homeserver($cnum,$cdomain);
1135: if ($chome ne 'no_host') {
1136: my %returnhash=&dump('environment',$cdomain,$cnum);
1137: if (!exists($returnhash{'con_lost'})) {
1138: my $normalid=$cdomain.'_'.$cnum;
1139: my %envhash=();
1140: $returnhash{'home'}= $chome;
1141: $returnhash{'domain'} = $cdomain;
1142: $returnhash{'num'} = $cnum;
1143: while (my ($name,$value) = each %returnhash) {
1144: $envhash{'course.'.$normalid.'.'.$name}=$value;
1145: }
1146: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1147: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1148: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1149: $envhash{'course.'.$normalid.'.last_cache'}=time;
1150: $envhash{'course.'.$normalid.'.home'}=$chome;
1151: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1152: $envhash{'course.'.$normalid.'.num'}=$cnum;
1153: &appenv(%envhash);
1154: return %returnhash;
1155: }
1156: }
1157: return ();
1158: }
1159:
1160: # -------------------------------------------------------- Get user privileges
1161:
1162: sub rolesinit {
1163: my ($domain,$username,$authhost)=@_;
1164: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1165: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1166: my %allroles=();
1167: my %thesepriv=();
1168: my $now=time;
1169: my $userroles="user.login.time=$now\n";
1170: my $thesestr;
1171:
1172: if ($rolesdump ne '') {
1173: map {
1174: if ($_!~/^rolesdef\&/) {
1175: my ($area,$role)=split(/=/,$_);
1176: $area=~s/\_\w\w$//;
1177: my ($trole,$tend,$tstart)=split(/_/,$role);
1178: $userroles.='user.role.'.$trole.'.'.$area.'='.
1179: $tstart.'.'.$tend."\n";
1180: if ($tend!=0) {
1181: if ($tend<$now) {
1182: $trole='';
1183: }
1184: }
1185: if ($tstart!=0) {
1186: if ($tstart>$now) {
1187: $trole='';
1188: }
1189: }
1190: if (($area ne '') && ($trole ne '')) {
1191: my $spec=$trole.'.'.$area;
1192: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1193: if ($trole =~ /^cr\//) {
1194: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1195: my $homsvr=homeserver($rauthor,$rdomain);
1196: if ($hostname{$homsvr} ne '') {
1197: my $roledef=
1198: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1199: $homsvr);
1200: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1201: my ($syspriv,$dompriv,$coursepriv)=
1202: split(/\_/,unescape($roledef));
1203: $allroles{'cm./'}.=':'.$syspriv;
1204: $allroles{$spec.'./'}.=':'.$syspriv;
1205: if ($tdomain ne '') {
1206: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1207: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1208: if ($trest ne '') {
1209: $allroles{'cm.'.$area}.=':'.$coursepriv;
1210: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1211: }
1212: }
1213: }
1214: }
1215: } else {
1216: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1217: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1218: if ($tdomain ne '') {
1219: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1220: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1221: if ($trest ne '') {
1222: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1223: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1224: }
1225: }
1226: }
1227: }
1228: }
1229: } split(/&/,$rolesdump);
1230: my $adv=0;
1231: my $author=0;
1232: map {
1233: %thesepriv=();
1234: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1235: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1236: map {
1237: if ($_ ne '') {
1238: my ($privilege,$restrictions)=split(/&/,$_);
1239: if ($restrictions eq '') {
1240: $thesepriv{$privilege}='F';
1241: } else {
1242: if ($thesepriv{$privilege} ne 'F') {
1243: $thesepriv{$privilege}.=$restrictions;
1244: }
1245: }
1246: }
1247: } split(/:/,$allroles{$_});
1248: $thesestr='';
1249: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1250: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1251: } keys %allroles;
1252: $userroles.='user.adv='.$adv."\n".
1253: 'user.author='.$author."\n";
1254: $ENV{'user.adv'}=$adv;
1255: }
1256: return $userroles;
1257: }
1258:
1259: # --------------------------------------------------------------- get interface
1260:
1261: sub get {
1262: my ($namespace,$storearr,$udomain,$uname)=@_;
1263: my $items='';
1264: map {
1265: $items.=escape($_).'&';
1266: } @$storearr;
1267: $items=~s/\&$//;
1268: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1269: if (!$uname) { $uname=$ENV{'user.name'}; }
1270: my $uhome=&homeserver($uname,$udomain);
1271:
1272: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1273: my @pairs=split(/\&/,$rep);
1274: my %returnhash=();
1275: my $i=0;
1276: map {
1277: $returnhash{$_}=unescape($pairs[$i]);
1278: $i++;
1279: } @$storearr;
1280: return %returnhash;
1281: }
1282:
1283: # --------------------------------------------------------------- del interface
1284:
1285: sub del {
1286: my ($namespace,$storearr,$udomain,$uname)=@_;
1287: my $items='';
1288: map {
1289: $items.=escape($_).'&';
1290: } @$storearr;
1291: $items=~s/\&$//;
1292: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1293: if (!$uname) { $uname=$ENV{'user.name'}; }
1294: my $uhome=&homeserver($uname,$udomain);
1295:
1296: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1297: }
1298:
1299: # -------------------------------------------------------------- dump interface
1300:
1301: sub dump {
1302: my ($namespace,$udomain,$uname)=@_;
1303: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1304: if (!$uname) { $uname=$ENV{'user.name'}; }
1305: my $uhome=&homeserver($uname,$udomain);
1306: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1307: my @pairs=split(/\&/,$rep);
1308: my %returnhash=();
1309: map {
1310: my ($key,$value)=split(/=/,$_);
1311: $returnhash{unescape($key)}=unescape($value);
1312: } @pairs;
1313: return %returnhash;
1314: }
1315:
1316: # --------------------------------------------------------------- put interface
1317:
1318: sub put {
1319: my ($namespace,$storehash,$udomain,$uname)=@_;
1320: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1321: if (!$uname) { $uname=$ENV{'user.name'}; }
1322: my $uhome=&homeserver($uname,$udomain);
1323: my $items='';
1324: map {
1325: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1326: } keys %$storehash;
1327: $items=~s/\&$//;
1328: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1329: }
1330:
1331: # ------------------------------------------------------ critical put interface
1332:
1333: sub cput {
1334: my ($namespace,$storehash,$udomain,$uname)=@_;
1335: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1336: if (!$uname) { $uname=$ENV{'user.name'}; }
1337: my $uhome=&homeserver($uname,$udomain);
1338: my $items='';
1339: map {
1340: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1341: } keys %$storehash;
1342: $items=~s/\&$//;
1343: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1344: }
1345:
1346: # -------------------------------------------------------------- eget interface
1347:
1348: sub eget {
1349: my ($namespace,$storearr,$udomain,$uname)=@_;
1350: my $items='';
1351: map {
1352: $items.=escape($_).'&';
1353: } @$storearr;
1354: $items=~s/\&$//;
1355: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1356: if (!$uname) { $uname=$ENV{'user.name'}; }
1357: my $uhome=&homeserver($uname,$udomain);
1358: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1359: my @pairs=split(/\&/,$rep);
1360: my %returnhash=();
1361: my $i=0;
1362: map {
1363: $returnhash{$_}=unescape($pairs[$i]);
1364: $i++;
1365: } @$storearr;
1366: return %returnhash;
1367: }
1368:
1369: # ------------------------------------------------- Check for a user privilege
1370:
1371: sub allowed {
1372: my ($priv,$uri)=@_;
1373:
1374: my $orguri=$uri;
1375: $uri=&declutter($uri);
1376:
1377: # Free bre access to adm and meta resources
1378:
1379: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1380: return 'F';
1381: }
1382:
1383: # Free bre to public access
1384:
1385: if ($priv eq 'bre') {
1386: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1387: }
1388:
1389: my $thisallowed='';
1390: my $statecond=0;
1391: my $courseprivid='';
1392:
1393: # Course
1394:
1395: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1396: $thisallowed.=$1;
1397: }
1398:
1399: # Domain
1400:
1401: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1402: =~/$priv\&([^\:]*)/) {
1403: $thisallowed.=$1;
1404: }
1405:
1406: # Course: uri itself is a course
1407: my $courseuri=$uri;
1408: $courseuri=~s/\_(\d)/\/$1/;
1409: $courseuri=~s/^([^\/])/\/$1/;
1410:
1411: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1412: =~/$priv\&([^\:]*)/) {
1413: $thisallowed.=$1;
1414: }
1415:
1416: # Full access at system, domain or course-wide level? Exit.
1417:
1418: if ($thisallowed=~/F/) {
1419: return 'F';
1420: }
1421:
1422: # If this is generating or modifying users, exit with special codes
1423:
1424: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1425: return $thisallowed;
1426: }
1427: #
1428: # Gathered so far: system, domain and course wide privileges
1429: #
1430: # Course: See if uri or referer is an individual resource that is part of
1431: # the course
1432:
1433: if ($ENV{'request.course.id'}) {
1434: $courseprivid=$ENV{'request.course.id'};
1435: if ($ENV{'request.course.sec'}) {
1436: $courseprivid.='/'.$ENV{'request.course.sec'};
1437: }
1438: $courseprivid=~s/\_/\//;
1439: my $checkreferer=1;
1440: my @uriparts=split(/\//,$uri);
1441: my $filename=$uriparts[$#uriparts];
1442: my $pathname=$uri;
1443: $pathname=~s/\/$filename$//;
1444: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1445: /\&$filename\:([\d\|]+)\&/) {
1446: $statecond=$1;
1447: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1448: =~/$priv\&([^\:]*)/) {
1449: $thisallowed.=$1;
1450: $checkreferer=0;
1451: }
1452: }
1453:
1454: if ($checkreferer) {
1455: my $refuri=$ENV{'httpref.'.$orguri};
1456:
1457: unless ($refuri) {
1458: map {
1459: if ($_=~/^httpref\..*\*/) {
1460: my $pattern=$_;
1461: $pattern=~s/^httpref\.\/res\///;
1462: $pattern=~s/\*/\[\^\/\]\+/g;
1463: $pattern=~s/\//\\\//g;
1464: if ($orguri=~/$pattern/) {
1465: $refuri=$ENV{$_};
1466: }
1467: }
1468: } keys %ENV;
1469: }
1470: if ($refuri) {
1471: $refuri=&declutter($refuri);
1472: my @uriparts=split(/\//,$refuri);
1473: my $filename=$uriparts[$#uriparts];
1474: my $pathname=$refuri;
1475: $pathname=~s/\/$filename$//;
1476: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1477: /\&$filename\:([\d\|]+)\&/) {
1478: my $refstatecond=$1;
1479: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1480: =~/$priv\&([^\:]*)/) {
1481: $thisallowed.=$1;
1482: $uri=$refuri;
1483: $statecond=$refstatecond;
1484: }
1485: }
1486: }
1487: }
1488: }
1489:
1490: #
1491: # Gathered now: all privileges that could apply, and condition number
1492: #
1493: #
1494: # Full or no access?
1495: #
1496:
1497: if ($thisallowed=~/F/) {
1498: return 'F';
1499: }
1500:
1501: unless ($thisallowed) {
1502: return '';
1503: }
1504:
1505: # Restrictions exist, deal with them
1506: #
1507: # C:according to course preferences
1508: # R:according to resource settings
1509: # L:unless locked
1510: # X:according to user session state
1511: #
1512:
1513: # Possibly locked functionality, check all courses
1514: # Locks might take effect only after 10 minutes cache expiration for other
1515: # courses, and 2 minutes for current course
1516:
1517: my $envkey;
1518: if ($thisallowed=~/L/) {
1519: foreach $envkey (keys %ENV) {
1520: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1521: my $courseid=$2;
1522: my $roleid=$1.'.'.$2;
1523: $courseid=~s/^\///;
1524: my $expiretime=600;
1525: if ($ENV{'request.role'} eq $roleid) {
1526: $expiretime=120;
1527: }
1528: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1529: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1530: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1531: &coursedescription($courseid);
1532: }
1533: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1534: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1535: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1536: &log($ENV{'user.domain'},$ENV{'user.name'},
1537: $ENV{'user.host'},
1538: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1539: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1540: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1541: return '';
1542: }
1543: }
1544: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1545: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1546: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1547: &log($ENV{'user.domain'},$ENV{'user.name'},
1548: $ENV{'user.host'},
1549: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1550: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1551: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1552: return '';
1553: }
1554: }
1555: }
1556: }
1557: }
1558:
1559: #
1560: # Rest of the restrictions depend on selected course
1561: #
1562:
1563: unless ($ENV{'request.course.id'}) {
1564: return '1';
1565: }
1566:
1567: #
1568: # Now user is definitely in a course
1569: #
1570:
1571:
1572: # Course preferences
1573:
1574: if ($thisallowed=~/C/) {
1575: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1576: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1577: =~/\,$rolecode\,/) {
1578: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1579: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1580: $ENV{'request.course.id'});
1581: return '';
1582: }
1583: }
1584:
1585: # Resource preferences
1586:
1587: if ($thisallowed=~/R/) {
1588: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1589: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1590: if (-e $filename) {
1591: my @content;
1592: {
1593: my $fh=Apache::File->new($filename);
1594: @content=<$fh>;
1595: }
1596: if (join('',@content)=~
1597: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1598: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1599: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1600: return '';
1601:
1602: }
1603: }
1604: }
1605:
1606: # Restricted by state?
1607:
1608: if ($thisallowed=~/X/) {
1609: if (&condval($statecond)) {
1610: return '2';
1611: } else {
1612: return '';
1613: }
1614: }
1615:
1616: return 'F';
1617: }
1618:
1619: # ----------------------------------------------------------------- Define Role
1620:
1621: sub definerole {
1622: if (allowed('mcr','/')) {
1623: my ($rolename,$sysrole,$domrole,$courole)=@_;
1624: map {
1625: my ($crole,$cqual)=split(/\&/,$_);
1626: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1627: if ($pr{'cr:s'}=~/$crole\&/) {
1628: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1629: return "refused:s:$crole&$cqual";
1630: }
1631: }
1632: } split('/',$sysrole);
1633: map {
1634: my ($crole,$cqual)=split(/\&/,$_);
1635: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1636: if ($pr{'cr:d'}=~/$crole\&/) {
1637: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1638: return "refused:d:$crole&$cqual";
1639: }
1640: }
1641: } split('/',$domrole);
1642: map {
1643: my ($crole,$cqual)=split(/\&/,$_);
1644: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1645: if ($pr{'cr:c'}=~/$crole\&/) {
1646: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1647: return "refused:c:$crole&$cqual";
1648: }
1649: }
1650: } split('/',$courole);
1651: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1652: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1653: "rolesdef_$rolename=".
1654: escape($sysrole.'_'.$domrole.'_'.$courole);
1655: return reply($command,$ENV{'user.home'});
1656: } else {
1657: return 'refused';
1658: }
1659: }
1660:
1661: # ---------------- Make a metadata query against the network of library servers
1662:
1663: sub metadata_query {
1664: my ($query,$custom,$customshow)=@_;
1665: my %rhash;
1666: for my $server (keys %libserv) {
1667: unless ($custom or $customshow) {
1668: my $reply=&reply("querysend:".&escape($query),$server);
1669: $rhash{$server}=$reply;
1670: }
1671: else {
1672: my $reply=&reply("querysend:".&escape($query).':'.
1673: &escape($custom).':'.&escape($customshow),
1674: $server);
1675: $rhash{$server}=$reply;
1676: }
1677: }
1678: return \%rhash;
1679: }
1680:
1681: # ------------------------------------------------------------------ Plain Text
1682:
1683: sub plaintext {
1684: my $short=shift;
1685: return $prp{$short};
1686: }
1687:
1688: # ------------------------------------------------------------------ Plain Text
1689:
1690: sub fileembstyle {
1691: my $ending=shift;
1692: return $fe{$ending};
1693: }
1694:
1695: # ------------------------------------------------------------ Description Text
1696:
1697: sub filedescription {
1698: my $ending=shift;
1699: return $fd{$ending};
1700: }
1701:
1702: # ----------------------------------------------------------------- Assign Role
1703:
1704: sub assignrole {
1705: my ($udom,$uname,$url,$role,$end,$start)=@_;
1706: my $mrole;
1707: if ($role =~ /^cr\//) {
1708: unless (&allowed('ccr',$url)) {
1709: &logthis('Refused custom assignrole: '.
1710: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1711: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1712: return 'refused';
1713: }
1714: $mrole='cr';
1715: } else {
1716: my $cwosec=$url;
1717: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1718: unless (&allowed('c'.$role,$cwosec)) {
1719: &logthis('Refused assignrole: '.
1720: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1721: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1722: return 'refused';
1723: }
1724: $mrole=$role;
1725: }
1726: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1727: "$udom:$uname:$url".'_'."$mrole=$role";
1728: if ($end) { $command.='_'.$end; }
1729: if ($start) {
1730: if ($end) {
1731: $command.='_'.$start;
1732: } else {
1733: $command.='_0_'.$start;
1734: }
1735: }
1736: return &reply($command,&homeserver($uname,$udom));
1737: }
1738:
1739: # -------------------------------------------------- Modify user authentication
1740: sub modifyuserauth {
1741: my ($udom,$uname,$umode,$upass)=@_;
1742: my $uhome=&homeserver($uname,$udom);
1743: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1744: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1745: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1746: &escape($upass),$uhome);
1747: unless ($reply eq 'ok') {
1748: return 'error: '.$reply;
1749: }
1750: return 'ok';
1751: }
1752:
1753: # --------------------------------------------------------------- Modify a user
1754:
1755:
1756: sub modifyuser {
1757: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1758: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1759: $umode.', '.$first.', '.$middle.', '.
1760: $last.', '.$gene.' by '.
1761: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1762: my $uhome=&homeserver($uname,$udom);
1763: # ----------------------------------------------------------------- Create User
1764: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1765: my $unhome='';
1766: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1767: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1768: } else {
1769: my $tryserver;
1770: my $loadm=10000000;
1771: foreach $tryserver (keys %libserv) {
1772: if ($hostdom{$tryserver} eq $udom) {
1773: my $answer=reply('load',$tryserver);
1774: if (($answer=~/\d+/) && ($answer<$loadm)) {
1775: $loadm=$answer;
1776: $unhome=$tryserver;
1777: }
1778: }
1779: }
1780: }
1781: if (($unhome eq '') || ($unhome eq 'no_host')) {
1782: return 'error: find home';
1783: }
1784: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1785: &escape($upass),$unhome);
1786: unless ($reply eq 'ok') {
1787: return 'error: '.$reply;
1788: }
1789: $uhome=&homeserver($uname,$udom);
1790: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1791: return 'error: verify home';
1792: }
1793: }
1794: # ---------------------------------------------------------------------- Add ID
1795: if ($uid) {
1796: $uid=~tr/A-Z/a-z/;
1797: my %uidhash=&idrget($udom,$uname);
1798: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1799: unless ($uid eq $uidhash{$uname}) {
1800: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1801: }
1802: } else {
1803: &idput($udom,($uname => $uid));
1804: }
1805: }
1806: # -------------------------------------------------------------- Add names, etc
1807: my %names=&get('environment',
1808: ['firstname','middlename','lastname','generation'],
1809: $udom,$uname);
1810: if ($first) { $names{'firstname'} = $first; }
1811: if ($middle) { $names{'middlename'} = $middle; }
1812: if ($last) { $names{'lastname'} = $last; }
1813: if ($gene) { $names{'generation'} = $gene; }
1814: my $reply = &put('environment', \%names, $udom,$uname);
1815: if ($reply ne 'ok') { return 'error: '.$reply; }
1816: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1817: $umode.', '.$first.', '.$middle.', '.
1818: $last.', '.$gene.' by '.
1819: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1820: return 'ok';
1821: }
1822:
1823: # -------------------------------------------------------------- Modify student
1824:
1825: sub modifystudent {
1826: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1827: $end,$start)=@_;
1828: my $cid='';
1829: unless ($cid=$ENV{'request.course.id'}) {
1830: return 'not_in_class';
1831: }
1832: # --------------------------------------------------------------- Make the user
1833: my $reply=&modifyuser
1834: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1835: unless ($reply eq 'ok') { return $reply; }
1836: my $uhome=&homeserver($uname,$udom);
1837: if (($uhome eq '') || ($uhome eq 'no_host')) {
1838: return 'error: no such user';
1839: }
1840: # -------------------------------------------------- Add student to course list
1841: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1842: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1843: &escape($uname.':'.$udom).'='.
1844: &escape($end.':'.$start),
1845: $ENV{'course.'.$cid.'.home'});
1846: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1847: return 'error: '.$reply;
1848: }
1849: # ---------------------------------------------------- Add student role to user
1850: my $uurl='/'.$cid;
1851: $uurl=~s/\_/\//g;
1852: if ($usec) {
1853: $uurl.='/'.$usec;
1854: }
1855: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1856: }
1857:
1858: # ------------------------------------------------- Write to course preferences
1859:
1860: sub writecoursepref {
1861: my ($courseid,%prefs)=@_;
1862: $courseid=~s/^\///;
1863: $courseid=~s/\_/\//g;
1864: my ($cdomain,$cnum)=split(/\//,$courseid);
1865: my $chome=homeserver($cnum,$cdomain);
1866: if (($chome eq '') || ($chome eq 'no_host')) {
1867: return 'error: no such course';
1868: }
1869: my $cstring='';
1870: map {
1871: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1872: } keys %prefs;
1873: $cstring=~s/\&$//;
1874: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1875: }
1876:
1877: # ---------------------------------------------------------- Make/modify course
1878:
1879: sub createcourse {
1880: my ($udom,$description,$url)=@_;
1881: $url=&declutter($url);
1882: my $cid='';
1883: unless (&allowed('ccc',$ENV{'user.domain'})) {
1884: return 'refused';
1885: }
1886: unless ($udom eq $ENV{'user.domain'}) {
1887: return 'refused';
1888: }
1889: # ------------------------------------------------------------------- Create ID
1890: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1891: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1892: # ----------------------------------------------- Make sure that does not exist
1893: my $uhome=&homeserver($uname,$udom);
1894: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1895: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1896: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1897: $uhome=&homeserver($uname,$udom);
1898: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1899: return 'error: unable to generate unique course-ID';
1900: }
1901: }
1902: # ------------------------------------------------------------- Make the course
1903: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1904: $ENV{'user.home'});
1905: unless ($reply eq 'ok') { return 'error: '.$reply; }
1906: $uhome=&homeserver($uname,$udom);
1907: if (($uhome eq '') || ($uhome eq 'no_host')) {
1908: return 'error: no such course';
1909: }
1910: &writecoursepref($udom.'_'.$uname,
1911: ('description' => $description,
1912: 'url' => $url));
1913: return '/'.$udom.'/'.$uname;
1914: }
1915:
1916: # ---------------------------------------------------------- Assign Custom Role
1917:
1918: sub assigncustomrole {
1919: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1920: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1921: $end,$start);
1922: }
1923:
1924: # ----------------------------------------------------------------- Revoke Role
1925:
1926: sub revokerole {
1927: my ($udom,$uname,$url,$role)=@_;
1928: my $now=time;
1929: return &assignrole($udom,$uname,$url,$role,$now);
1930: }
1931:
1932: # ---------------------------------------------------------- Revoke Custom Role
1933:
1934: sub revokecustomrole {
1935: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1936: my $now=time;
1937: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1938: }
1939:
1940: # ------------------------------------------------------------ Directory lister
1941:
1942: sub dirlist {
1943: my $uri=shift;
1944: $uri=~s/^\///;
1945: $uri=~s/\/$//;
1946: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1947: if ($udom) {
1948: if ($uname) {
1949: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1950: homeserver($uname,$udom));
1951: return split(/:/,$listing);
1952: } else {
1953: my $tryserver;
1954: my %allusers=();
1955: foreach $tryserver (keys %libserv) {
1956: if ($hostdom{$tryserver} eq $udom) {
1957: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1958: $tryserver);
1959: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1960: && ($listing ne 'con_lost')) {
1961: map {
1962: my ($entry,@stat)=split(/&/,$_);
1963: $allusers{$entry}=1;
1964: } split(/:/,$listing);
1965: }
1966: }
1967: }
1968: my $alluserstr='';
1969: map {
1970: $alluserstr.=$_.'&user:';
1971: } sort keys %allusers;
1972: $alluserstr=~s/:$//;
1973: return split(/:/,$alluserstr);
1974: }
1975: } else {
1976: my $tryserver;
1977: my %alldom=();
1978: foreach $tryserver (keys %libserv) {
1979: $alldom{$hostdom{$tryserver}}=1;
1980: }
1981: my $alldomstr='';
1982: map {
1983: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1984: } sort keys %alldom;
1985: $alldomstr=~s/:$//;
1986: return split(/:/,$alldomstr);
1987: }
1988: }
1989:
1990: # -------------------------------------------------------- Value of a Condition
1991:
1992: sub directcondval {
1993: my $number=shift;
1994: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1995: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1996: } else {
1997: return 2;
1998: }
1999: }
2000:
2001: sub condval {
2002: my $condidx=shift;
2003: my $result=0;
2004: my $allpathcond='';
2005: map {
2006: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2007: $allpathcond.=
2008: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2009: }
2010: } split(/\|/,$condidx);
2011: $allpathcond=~s/\|$//;
2012: if ($ENV{'request.course.id'}) {
2013: if ($allpathcond) {
2014: my $operand='|';
2015: my @stack;
2016: map {
2017: if ($_ eq '(') {
2018: push @stack,($operand,$result)
2019: } elsif ($_ eq ')') {
2020: my $before=pop @stack;
2021: if (pop @stack eq '&') {
2022: $result=$result>$before?$before:$result;
2023: } else {
2024: $result=$result>$before?$result:$before;
2025: }
2026: } elsif (($_ eq '&') || ($_ eq '|')) {
2027: $operand=$_;
2028: } else {
2029: my $new=directcondval($_);
2030: if ($operand eq '&') {
2031: $result=$result>$new?$new:$result;
2032: } else {
2033: $result=$result>$new?$result:$new;
2034: }
2035: }
2036: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2037: }
2038: }
2039: return $result;
2040: }
2041:
2042: # --------------------------------------------------------- Value of a Variable
2043:
2044: sub EXT {
2045: my ($varname,$symbparm)=@_;
2046: unless ($varname) { return ''; }
2047: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2048: my $rest;
2049: if ($therest[0]) {
2050: $rest=join('.',@therest);
2051: } else {
2052: $rest='';
2053: }
2054: my $qualifierrest=$qualifier;
2055: if ($rest) { $qualifierrest.='.'.$rest; }
2056: my $spacequalifierrest=$space;
2057: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2058: if ($realm eq 'user') {
2059: # --------------------------------------------------------------- user.resource
2060: if ($space eq 'resource') {
2061: my %restored=&restore();
2062: return $restored{$qualifierrest};
2063: # ----------------------------------------------------------------- user.access
2064: } elsif ($space eq 'access') {
2065: return &allowed($qualifier,$rest);
2066: # ------------------------------------------ user.preferences, user.environment
2067: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2068: return $ENV{join('.',('environment',$qualifierrest))};
2069: # ----------------------------------------------------------------- user.course
2070: } elsif ($space eq 'course') {
2071: return $ENV{join('.',('request.course',$qualifier))};
2072: # ------------------------------------------------------------------- user.role
2073: } elsif ($space eq 'role') {
2074: my ($role,$where)=split(/\./,$ENV{'request.role'});
2075: if ($qualifier eq 'value') {
2076: return $role;
2077: } elsif ($qualifier eq 'extent') {
2078: return $where;
2079: }
2080: # ----------------------------------------------------------------- user.domain
2081: } elsif ($space eq 'domain') {
2082: return $ENV{'user.domain'};
2083: # ------------------------------------------------------------------- user.name
2084: } elsif ($space eq 'name') {
2085: return $ENV{'user.name'};
2086: # ---------------------------------------------------- Any other user namespace
2087: } else {
2088: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2089: my %reply=&get($space,[$item]);
2090: return $reply{$item};
2091: }
2092: } elsif ($realm eq 'request') {
2093: # ------------------------------------------------------------- request.browser
2094: if ($space eq 'browser') {
2095: return $ENV{'browser.'.$qualifier};
2096: # ------------------------------------------------------------ request.filename
2097: } else {
2098: return $ENV{'request.'.$spacequalifierrest};
2099: }
2100: } elsif ($realm eq 'course') {
2101: # ---------------------------------------------------------- course.description
2102: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2103: $spacequalifierrest};
2104: } elsif ($realm eq 'resource') {
2105: if ($ENV{'request.course.id'}) {
2106:
2107: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2108:
2109:
2110: # ----------------------------------------------------- Cascading lookup scheme
2111: my $symbp;
2112: if ($symbparm) {
2113: $symbp=$symbparm;
2114: } else {
2115: $symbp=&symbread();
2116: }
2117: my $mapp=(split(/\_\_\_/,$symbp))[0];
2118:
2119: my $symbparm=$symbp.'.'.$spacequalifierrest;
2120: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2121:
2122: my $seclevel=
2123: $ENV{'request.course.id'}.'.['.
2124: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2125: my $seclevelr=
2126: $ENV{'request.course.id'}.'.['.
2127: $ENV{'request.course.sec'}.'].'.$symbparm;
2128: my $seclevelm=
2129: $ENV{'request.course.id'}.'.['.
2130: $ENV{'request.course.sec'}.'].'.$mapparm;
2131:
2132: my $courselevel=
2133: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2134: my $courselevelr=
2135: $ENV{'request.course.id'}.'.'.$symbparm;
2136: my $courselevelm=
2137: $ENV{'request.course.id'}.'.'.$mapparm;
2138:
2139: # ----------------------------------------------------------- first, check user
2140: my %resourcedata=get('resourcedata',
2141: [$courselevelr,$courselevelm,$courselevel]);
2142: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2143: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2144:
2145: if ($resourcedata{$courselevelr}) {
2146: return $resourcedata{$courselevelr}; }
2147: if ($resourcedata{$courselevelm}) {
2148: return $resourcedata{$courselevelm}; }
2149: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2150:
2151: } else {
2152: if ($resourcedata{$courselevelr}!~/No such file/) {
2153: &logthis("<font color=blue>WARNING:".
2154: " Trying to get resource data for ".$ENV{'user.name'}." at "
2155: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2156: "</font>");
2157: }
2158: }
2159:
2160: # -------------------------------------------------------- second, check course
2161:
2162: my $reply=&reply('get:'.
2163: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2164: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2165: ':resourcedata:'.
2166: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2167: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2168: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2169: if ($reply!~/^error\:/) {
2170: map {
2171: if ($_) { return &unescape($_); }
2172: } split(/\&/,$reply);
2173: }
2174: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2175: &logthis("<font color=blue>WARNING:".
2176: " Getting ".$reply." asking for ".$varname." for ".
2177: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2178: ' at '.
2179: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2180: ' from '.
2181: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2182: "</font>");
2183: }
2184: # ------------------------------------------------------ third, check map parms
2185: my %parmhash=();
2186: my $thisparm='';
2187: if (tie(%parmhash,'GDBM_File',
2188: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2189: $thisparm=$parmhash{$symbparm};
2190: untie(%parmhash);
2191: }
2192: if ($thisparm) { return $thisparm; }
2193: }
2194:
2195: # --------------------------------------------- last, look in resource metadata
2196:
2197: $spacequalifierrest=~s/\./\_/;
2198: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2199: if ($metadata) { return $metadata; }
2200: $metadata=&metadata($ENV{'request.filename'},
2201: 'parameter_'.$spacequalifierrest);
2202: if ($metadata) { return $metadata; }
2203:
2204: # ------------------------------------------------------------------ Cascade up
2205:
2206: unless ($space eq '0') {
2207: my ($part,$id)=split(/\_/,$space);
2208: if ($id) {
2209: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2210: $symbparm);
2211: if ($partgeneral) { return $partgeneral; }
2212: } else {
2213: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2214: $symbparm);
2215: if ($resourcegeneral) { return $resourcegeneral; }
2216: }
2217: }
2218:
2219: # ---------------------------------------------------- Any other user namespace
2220: } elsif ($realm eq 'environment') {
2221: # ----------------------------------------------------------------- environment
2222: return $ENV{'environment.'.$spacequalifierrest};
2223: } elsif ($realm eq 'system') {
2224: # ----------------------------------------------------------------- system.time
2225: if ($space eq 'time') {
2226: return time;
2227: }
2228: }
2229: return '';
2230: }
2231:
2232: # ---------------------------------------------------------------- Get metadata
2233:
2234: sub metadata {
2235: my ($uri,$what,$liburi,$prefix)=@_;
2236:
2237: $uri=&declutter($uri);
2238: my $filename=$uri;
2239: $uri=~s/\.meta$//;
2240: #
2241: # Is the metadata already cached?
2242: # If "keys" are set, the assumption is that everything is already cached.
2243: # Everything is cached by the main uri, libraries are never directly cached
2244: #
2245: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2246: #
2247: # Is this a recursive call for a library?
2248: #
2249: if ($liburi) {
2250: $liburi=&declutter($liburi);
2251: $filename=$liburi;
2252: }
2253: my %metathesekeys=();
2254: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2255: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2256: my $parser=HTML::TokeParser->new(\$metastring);
2257: my $token;
2258: undef %metathesekeys;
2259: while ($token=$parser->get_token) {
2260: if ($token->[0] eq 'S') {
2261: if (defined($token->[2]->{'package'})) {
2262: #
2263: # This is a package - get package info
2264: #
2265: my $package=$token->[2]->{'package'};
2266: my $keyroot='';
2267: if ($prefix) {
2268: $keyroot.='_'.$prefix;
2269: } else {
2270: if (defined($token->[2]->{'part'})) {
2271: $keyroot.='_'.$token->[2]->{'part'};
2272: }
2273: }
2274: if (defined($token->[2]->{'id'})) {
2275: $keyroot.='_'.$token->[2]->{'id'};
2276: }
2277: if ($metacache{$uri.':packages'}) {
2278: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2279: } else {
2280: $metacache{$uri.':packages'}=$package.$keyroot;
2281: }
2282: map {
2283: if ($_=~/^$package\&/) {
2284: my ($pack,$name,$subp)=split(/\&/,$_);
2285: my $value=$packagetab{$_};
2286: my $part=$keyroot;
2287: $part=~s/^\_//;
2288: if ($subp eq 'display') {
2289: $value.=' [Part: '.$part.']';
2290: }
2291: my $unikey='parameter'.$keyroot.'_'.$name;
2292: $metathesekeys{$unikey}=1;
2293: $metacache{$uri.':'.$unikey.'.part'}=$part;
2294: unless
2295: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2296: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2297: }
2298: }
2299: } keys %packagetab;
2300: } else {
2301: #
2302: # This is not a package - some other kind of start tag
2303: #
2304: my $entry=$token->[1];
2305: my $unikey=$entry;
2306: if ($prefix) {
2307: $unikey.='_'.$prefix;
2308: } else {
2309: if (defined($token->[2]->{'part'})) {
2310: $unikey.='_'.$token->[2]->{'part'};
2311: }
2312: }
2313: if (defined($token->[2]->{'id'})) {
2314: $unikey.='_'.$token->[2]->{'id'};
2315: }
2316:
2317: if ($entry eq 'import') {
2318: #
2319: # Importing a library here
2320: #
2321: my $libid=$token->[2]->{'id'};
2322:
2323:
2324: } else {
2325:
2326: if (defined($token->[2]->{'name'})) {
2327: $unikey.='_'.$token->[2]->{'name'};
2328: }
2329: $metathesekeys{$unikey}=1;
2330: map {
2331: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2332: } @{$token->[3]};
2333: unless (
2334: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2335: ) { $metacache{$uri.':'.$unikey}=
2336: $metacache{$uri.':'.$unikey.'.default'};
2337: }
2338: # end of not-a-package not-a-library import
2339: }
2340: # end of not-a-package start tag
2341: }
2342: # the next is the end of "start tag"
2343: }
2344: }
2345: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2346: $metacache{$uri.':cachedtimestamp'}=time;
2347: }
2348: return $metacache{$uri.':'.$what};
2349: }
2350:
2351: # ------------------------------------------------- Update symbolic store links
2352:
2353: sub symblist {
2354: my ($mapname,%newhash)=@_;
2355: $mapname=declutter($mapname);
2356: my %hash;
2357: if (($ENV{'request.course.fn'}) && (%newhash)) {
2358: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2359: &GDBM_WRCREAT,0640)) {
2360: map {
2361: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2362: } keys %newhash;
2363: if (untie(%hash)) {
2364: return 'ok';
2365: }
2366: }
2367: }
2368: return 'error';
2369: }
2370:
2371: # ------------------------------------------------------ Return symb list entry
2372:
2373: sub symbread {
2374: my $thisfn=shift;
2375: unless ($thisfn) {
2376: $thisfn=$ENV{'request.filename'};
2377: }
2378: $thisfn=declutter($thisfn);
2379: my %hash;
2380: my %bighash;
2381: my $syval='';
2382: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2383: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2384: &GDBM_READER,0640)) {
2385: $syval=$hash{$thisfn};
2386: untie(%hash);
2387: }
2388: # ---------------------------------------------------------- There was an entry
2389: if ($syval) {
2390: unless ($syval=~/\_\d+$/) {
2391: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2392: &appenv('request.ambiguous' => $thisfn);
2393: return '';
2394: }
2395: $syval.=$1;
2396: }
2397: } else {
2398: # ------------------------------------------------------- Was not in symb table
2399: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2400: &GDBM_READER,0640)) {
2401: # ---------------------------------------------- Get ID(s) for current resource
2402: my $ids=$bighash{'ids_/res/'.$thisfn};
2403: unless ($ids) {
2404: $ids=$bighash{'ids_/'.$thisfn};
2405: }
2406: if ($ids) {
2407: # ------------------------------------------------------------------- Has ID(s)
2408: my @possibilities=split(/\,/,$ids);
2409: if ($#possibilities==0) {
2410: # ----------------------------------------------- There is only one possibility
2411: my ($mapid,$resid)=split(/\./,$ids);
2412: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2413: } else {
2414: # ------------------------------------------ There is more than one possibility
2415: my $realpossible=0;
2416: map {
2417: my $file=$bighash{'src_'.$_};
2418: if (&allowed('bre',$file)) {
2419: my ($mapid,$resid)=split(/\./,$_);
2420: if ($bighash{'map_type_'.$mapid} ne 'page') {
2421: $realpossible++;
2422: $syval=declutter($bighash{'map_id_'.$mapid}).
2423: '___'.$resid;
2424: }
2425: }
2426: } @possibilities;
2427: if ($realpossible!=1) { $syval=''; }
2428: }
2429: }
2430: untie(%bighash)
2431: }
2432: }
2433: if ($syval) {
2434: return $syval.'___'.$thisfn;
2435: }
2436: }
2437: &appenv('request.ambiguous' => $thisfn);
2438: return '';
2439: }
2440:
2441: # ---------------------------------------------------------- Return random seed
2442:
2443: sub numval {
2444: my $txt=shift;
2445: $txt=~tr/A-J/0-9/;
2446: $txt=~tr/a-j/0-9/;
2447: $txt=~tr/K-T/0-9/;
2448: $txt=~tr/k-t/0-9/;
2449: $txt=~tr/U-Z/0-5/;
2450: $txt=~tr/u-z/0-5/;
2451: $txt=~s/\D//g;
2452: return int($txt);
2453: }
2454:
2455: sub rndseed {
2456: my ($symb,$courseid,$domain,$username)=@_;
2457: if (!$symb) {
2458: unless ($symb=&symbread()) { return time; }
2459: }
2460: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2461: if (!$domain) {$domain=$ENV{'user.domain'};}
2462: if (!$username) {$username=$ENV{'user.name'};}
2463: {
2464: use integer;
2465: my $symbchck=unpack("%32C*",$symb) << 27;
2466: my $symbseed=numval($symb) << 22;
2467: my $namechck=unpack("%32C*",$username) << 17;
2468: my $nameseed=numval($username) << 12;
2469: my $domainseed=unpack("%32C*",$domain) << 7;
2470: my $courseseed=unpack("%32C*",$courseid);
2471: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2472: #uncommenting these lines can break things!
2473: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2474: #&Apache::lonxml::debug("rndseed :$num:$symb");
2475: return $num;
2476: }
2477: }
2478:
2479: sub ireceipt {
2480: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2481: my $cuname=unpack("%32C*",$funame);
2482: my $cudom=unpack("%32C*",$fudom);
2483: my $cucourseid=unpack("%32C*",$fucourseid);
2484: my $cusymb=unpack("%32C*",$fusymb);
2485: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2486: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2487: ($cunique%$cuname+
2488: $cunique%$cudom+
2489: $cusymb%$cuname+
2490: $cusymb%$cudom+
2491: $cucourseid%$cuname+
2492: $cucourseid%$cudom);
2493: }
2494:
2495: sub receipt {
2496: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2497: $ENV{'request.course.id'},&symbread());
2498: }
2499:
2500: # ------------------------------------------------------------ Serves up a file
2501: # returns either the contents of the file or a -1
2502: sub getfile {
2503: my $file=shift;
2504: &repcopy($file);
2505: if (! -e $file ) { return -1; };
2506: my $fh=Apache::File->new($file);
2507: my $a='';
2508: while (<$fh>) { $a .=$_; }
2509: return $a
2510: }
2511:
2512: sub filelocation {
2513: my ($dir,$file) = @_;
2514: my $location;
2515: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2516: if ($file=~m:^/~:) { # is a contruction space reference
2517: $location = $file;
2518: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2519: } else {
2520: $file=~s/^$perlvar{'lonDocRoot'}//;
2521: $file=~s:^/*res::;
2522: if ( !( $file =~ m:^/:) ) {
2523: $location = $dir. '/'.$file;
2524: } else {
2525: $location = '/home/httpd/html/res'.$file;
2526: }
2527: }
2528: $location=~s://+:/:g; # remove duplicate /
2529: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2530: return $location;
2531: }
2532:
2533: sub hreflocation {
2534: my ($dir,$file)=@_;
2535: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2536: my $finalpath=filelocation($dir,$file);
2537: $finalpath=~s/^\/home\/httpd\/html//;
2538: return $finalpath;
2539: } else {
2540: return $file;
2541: }
2542: }
2543:
2544: # ------------------------------------------------------------- Declutters URLs
2545:
2546: sub declutter {
2547: my $thisfn=shift;
2548: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2549: $thisfn=~s/^\///;
2550: $thisfn=~s/^res\///;
2551: return $thisfn;
2552: }
2553:
2554: # -------------------------------------------------------- Escape Special Chars
2555:
2556: sub escape {
2557: my $str=shift;
2558: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2559: return $str;
2560: }
2561:
2562: # ----------------------------------------------------- Un-Escape Special Chars
2563:
2564: sub unescape {
2565: my $str=shift;
2566: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2567: return $str;
2568: }
2569:
2570: # ================================================================ Main Program
2571:
2572: sub BEGIN {
2573: unless ($readit) {
2574: # ------------------------------------------------------------ Read access.conf
2575: {
2576: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2577:
2578: while (my $configline=<$config>) {
2579: if ($configline =~ /PerlSetVar/) {
2580: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2581: chomp($varvalue);
2582: $perlvar{$varname}=$varvalue;
2583: }
2584: }
2585: }
2586:
2587: # ------------------------------------------------------------- Read hosts file
2588: {
2589: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2590:
2591: while (my $configline=<$config>) {
2592: chomp($configline);
2593: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2594: $hostname{$id}=$name;
2595: $hostdom{$id}=$domain;
2596: $hostip{$id}=$ip;
2597: if ($role eq 'library') { $libserv{$id}=$name; }
2598: }
2599: }
2600:
2601: # ------------------------------------------------------ Read spare server file
2602: {
2603: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2604:
2605: while (my $configline=<$config>) {
2606: chomp($configline);
2607: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2608: $spareid{$configline}=1;
2609: }
2610: }
2611: }
2612: # ------------------------------------------------------------ Read permissions
2613: {
2614: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2615:
2616: while (my $configline=<$config>) {
2617: chomp($configline);
2618: if ($configline) {
2619: my ($role,$perm)=split(/ /,$configline);
2620: if ($perm ne '') { $pr{$role}=$perm; }
2621: }
2622: }
2623: }
2624:
2625: # -------------------------------------------- Read plain texts for permissions
2626: {
2627: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2628:
2629: while (my $configline=<$config>) {
2630: chomp($configline);
2631: if ($configline) {
2632: my ($short,$plain)=split(/:/,$configline);
2633: if ($plain ne '') { $prp{$short}=$plain; }
2634: }
2635: }
2636: }
2637:
2638: # ---------------------------------------------------------- Read package table
2639: {
2640: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2641:
2642: while (my $configline=<$config>) {
2643: chomp($configline);
2644: my ($short,$plain)=split(/:/,$configline);
2645: my ($pack,$name)=split(/\&/,$short);
2646: if ($plain ne '') {
2647: $packagetab{$pack.'&'.$name.'&name'}=$name;
2648: $packagetab{$short}=$plain;
2649: }
2650: }
2651: }
2652:
2653: # ------------------------------------------------------------- Read file types
2654: {
2655: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2656:
2657: while (my $configline=<$config>) {
2658: chomp($configline);
2659: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2660: if ($descr[0] ne '') {
2661: $fe{$ending}=$emb;
2662: $fd{$ending}=join(' ',@descr);
2663: }
2664: }
2665: }
2666:
2667: %metacache=();
2668:
2669: $readit='done';
2670: &logtouch();
2671: &logthis('<font color=yellow>INFO: Read configuration</font>');
2672: }
2673: }
2674: 1;
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