1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # metadata_query(sql-query-string) : returns file handle of where sql
7: # results will be stored for query
8: # plaintext(short) : plain text explanation of short term
9: # fileembstyle(ext) : embed style in page for file extension
10: # filedescription(ext) : descriptor text for file extension
11: # allowed(short,url) : returns codes for allowed actions
12: # F: full access
13: # U,I,K: authentication modes (cxx only)
14: # '': forbidden
15: # 1: user needs to choose course
16: # 2: browse allowed
17: # definerole(rolename,sys,dom,cou) : define a custom role rolename
18: # set privileges in format of lonTabs/roles.tab for
19: # system, domain and course level,
20: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
21: # level given by url. Optional start and end dates
22: # (leave empty string or zero for "no date")
23: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
24: # custom role to a user for the level given by url.
25: # Specify name and domain of role author, and role name
26: # revokerole (udom,uname,url,role) : Revoke a role for url
27: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
28: # appenv(hash) : adds hash to session environment
29: # delenv(varname) : deletes all environment entries starting with varname
30: # store(hash) : stores hash permanently for this url
31: # cstore(hash) : critical store
32: # restore : returns hash for this url
33: # eget(namesp,array) : returns hash with keys from array filled in from namesp
34: # get(namesp,array) : returns hash with keys from array filled in from namesp
35: # del(namesp,array) : deletes keys out of array from namesp
36: # put(namesp,hash) : stores hash in namesp
37: # cput(namesp,hash) : critical put
38: # dump(namesp) : dumps the complete namespace into a hash
39: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
40: # hash
41: # coursedescription(id) : returns and caches course description for id
42: # repcopy(filename) : replicate file
43: # dirlist(url) : gets a directory listing
44: # directcondval(index) : reading condition value of single condition from
45: # state string
46: # condval(index) : value of condition index based on state
47: # EXT(name) : value of a variable
48: # symblist(map,hash) : Updates symbolic storage links
49: # symbread([filename]) : returns the data handle (filename optional)
50: # rndseed() : returns a random seed
51: # receipt() : returns a receipt to be given out to users
52: # getfile(filename) : returns the contents of filename, or a -1 if it can't
53: # be found, replicates and subscribes to the file
54: # filelocation(dir,file) : returns a farily clean absolute reference to file
55: # from the directory dir
56: # hreflocation(dir,file) : same as filelocation, but for hrefs
57: # log(domain,user,home,msg) : write to permanent log for user
58: # usection(domain,user,courseid) : output of section name/number or '' for
59: # "not in course" and '-1' for "no section"
60: # userenvironment(domain,user,what) : puts out any environment parameter
61: # for a user
62: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
63: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
64: # an array of IDs
65: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
66: # an array of names
67: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
68: # returns a comma separated list of keys
69: #
70: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
71: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
72: # 11/8,11/16,11/18,11/22,11/23,12/22,
73: # 01/06,01/13,02/24,02/28,02/29,
74: # 03/01,03/02,03/06,03/07,03/13,
75: # 04/05,05/29,05/31,06/01,
76: # 06/05,06/26 Gerd Kortemeyer
77: # 06/26 Ben Tyszka
78: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
79: # 08/14 Ben Tyszka
80: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
81: # 10/04 Gerd Kortemeyer
82: # 10/04 Guy Albertelli
83: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
84: # 10/30,10/31,
85: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
86: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
87: # 05/01/01 Guy Albertelli
88: # 05/01,06/01,09/01 Gerd Kortemeyer
89: # 09/01 Guy Albertelli
90: # 09/01,10/01,11/01 Gerd Kortemeyer
91: # 02/27/01 Scott Harrison
92: # 3/2 Gerd Kortemeyer
93: # 3/15 Scott Harrison
94: # 3/19,3/20 Gerd Kortemeyer
95:
96: package Apache::lonnet;
97:
98: use strict;
99: use Apache::File;
100: use LWP::UserAgent();
101: use HTTP::Headers;
102: use vars
103: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
104: use IO::Socket;
105: use GDBM_File;
106: use Apache::Constants qw(:common :http);
107: use HTML::TokeParser;
108: use Fcntl qw(:flock);
109:
110: # --------------------------------------------------------------------- Logging
111:
112: sub logthis {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
118: print $fh "$local ($$): $message\n";
119: return 1;
120: }
121:
122: sub logperm {
123: my $message=shift;
124: my $execdir=$perlvar{'lonDaemons'};
125: my $now=time;
126: my $local=localtime($now);
127: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
128: print $fh "$now:$message:$local\n";
129: return 1;
130: }
131:
132: # -------------------------------------------------- Non-critical communication
133: sub subreply {
134: my ($cmd,$server)=@_;
135: my $peerfile="$perlvar{'lonSockDir'}/$server";
136: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
137: Type => SOCK_STREAM,
138: Timeout => 10)
139: or return "con_lost";
140: print $client "$cmd\n";
141: my $answer=<$client>;
142: if (!$answer) { $answer="con_lost"; }
143: chomp($answer);
144: return $answer;
145: }
146:
147: sub reply {
148: my ($cmd,$server)=@_;
149: my $answer=subreply($cmd,$server);
150: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
151: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
152: &logthis("<font color=blue>WARNING:".
153: " $cmd to $server returned $answer</font>");
154: }
155: return $answer;
156: }
157:
158: # ----------------------------------------------------------- Send USR1 to lonc
159:
160: sub reconlonc {
161: my $peerfile=shift;
162: &logthis("Trying to reconnect for $peerfile");
163: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
164: if (my $fh=Apache::File->new("$loncfile")) {
165: my $loncpid=<$fh>;
166: chomp($loncpid);
167: if (kill 0 => $loncpid) {
168: &logthis("lonc at pid $loncpid responding, sending USR1");
169: kill USR1 => $loncpid;
170: sleep 1;
171: if (-e "$peerfile") { return; }
172: &logthis("$peerfile still not there, give it another try");
173: sleep 5;
174: if (-e "$peerfile") { return; }
175: &logthis(
176: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
177: } else {
178: &logthis(
179: "<font color=blue>WARNING:".
180: " lonc at pid $loncpid not responding, giving up</font>");
181: }
182: } else {
183: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
184: }
185: }
186:
187: # ------------------------------------------------------ Critical communication
188:
189: sub critical {
190: my ($cmd,$server)=@_;
191: unless ($hostname{$server}) {
192: &logthis("<font color=blue>WARNING:".
193: " Critical message to unknown server ($server)</font>");
194: return 'no_such_host';
195: }
196: my $answer=reply($cmd,$server);
197: if ($answer eq 'con_lost') {
198: my $pingreply=reply('ping',$server);
199: &reconlonc("$perlvar{'lonSockDir'}/$server");
200: my $pongreply=reply('pong',$server);
201: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
202: $answer=reply($cmd,$server);
203: if ($answer eq 'con_lost') {
204: my $now=time;
205: my $middlename=$cmd;
206: $middlename=substr($middlename,0,16);
207: $middlename=~s/\W//g;
208: my $dfilename=
209: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
210: {
211: my $dfh;
212: if ($dfh=Apache::File->new(">$dfilename")) {
213: print $dfh "$cmd\n";
214: }
215: }
216: sleep 2;
217: my $wcmd='';
218: {
219: my $dfh;
220: if ($dfh=Apache::File->new("$dfilename")) {
221: $wcmd=<$dfh>;
222: }
223: }
224: chomp($wcmd);
225: if ($wcmd eq $cmd) {
226: &logthis("<font color=blue>WARNING: ".
227: "Connection buffer $dfilename: $cmd</font>");
228: &logperm("D:$server:$cmd");
229: return 'con_delayed';
230: } else {
231: &logthis("<font color=red>CRITICAL:"
232: ." Critical connection failed: $server $cmd</font>");
233: &logperm("F:$server:$cmd");
234: return 'con_failed';
235: }
236: }
237: }
238: return $answer;
239: }
240:
241: # ---------------------------------------------------------- Append Environment
242:
243: sub appenv {
244: my %newenv=@_;
245: map {
246: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
247: &logthis("<font color=blue>WARNING: ".
248: "Attempt to modify environment ".$_." to ".$newenv{$_});
249: delete($newenv{$_});
250: } else {
251: $ENV{$_}=$newenv{$_};
252: }
253: } keys %newenv;
254:
255: my $lockfh;
256: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
257: return 'error: '.$!;
258: }
259: unless (flock($lockfh,LOCK_EX)) {
260: &logthis("<font color=blue>WARNING: ".
261: 'Could not obtain exclusive lock in appenv: '.$!);
262: $lockfh->close();
263: return 'error: '.$!;
264: }
265:
266: my @oldenv;
267: {
268: my $fh;
269: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
270: return 'error: '.$!;
271: }
272: @oldenv=<$fh>;
273: $fh->close();
274: }
275: for (my $i=0; $i<=$#oldenv; $i++) {
276: chomp($oldenv[$i]);
277: if ($oldenv[$i] ne '') {
278: my ($name,$value)=split(/=/,$oldenv[$i]);
279: unless (defined($newenv{$name})) {
280: $newenv{$name}=$value;
281: }
282: }
283: }
284: {
285: my $fh;
286: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
287: return 'error';
288: }
289: my $newname;
290: foreach $newname (keys %newenv) {
291: print $fh "$newname=$newenv{$newname}\n";
292: }
293: $fh->close();
294: }
295:
296: $lockfh->close();
297: return 'ok';
298: }
299: # ----------------------------------------------------- Delete from Environment
300:
301: sub delenv {
302: my $delthis=shift;
303: my %newenv=();
304: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
305: &logthis("<font color=blue>WARNING: ".
306: "Attempt to delete from environment ".$delthis);
307: return 'error';
308: }
309: my @oldenv;
310: {
311: my $fh;
312: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
313: return 'error';
314: }
315: unless (flock($fh,LOCK_SH)) {
316: &logthis("<font color=blue>WARNING: ".
317: 'Could not obtain shared lock in delenv: '.$!);
318: $fh->close();
319: return 'error: '.$!;
320: }
321: @oldenv=<$fh>;
322: $fh->close();
323: }
324: {
325: my $fh;
326: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
327: return 'error';
328: }
329: unless (flock($fh,LOCK_EX)) {
330: &logthis("<font color=blue>WARNING: ".
331: 'Could not obtain exclusive lock in delenv: '.$!);
332: $fh->close();
333: return 'error: '.$!;
334: }
335: map {
336: unless ($_=~/^$delthis/) { print $fh $_; }
337: } @oldenv;
338: $fh->close();
339: }
340: return 'ok';
341: }
342:
343: # ------------------------------ Find server with least workload from spare.tab
344:
345: sub spareserver {
346: my $tryserver;
347: my $spareserver='';
348: my $lowestserver=100;
349: foreach $tryserver (keys %spareid) {
350: my $answer=reply('load',$tryserver);
351: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
352: $spareserver="http://$hostname{$tryserver}";
353: $lowestserver=$answer;
354: }
355: }
356: return $spareserver;
357: }
358:
359: # --------- Try to authenticate user from domain's lib servers (first this one)
360:
361: sub authenticate {
362: my ($uname,$upass,$udom)=@_;
363: $upass=escape($upass);
364: if (($perlvar{'lonRole'} eq 'library') &&
365: ($udom eq $perlvar{'lonDefDomain'})) {
366: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
367: if ($answer =~ /authorized/) {
368: if ($answer eq 'authorized') {
369: &logthis("User $uname at $udom authorized by local server");
370: return $perlvar{'lonHostID'};
371: }
372: if ($answer eq 'non_authorized') {
373: &logthis("User $uname at $udom rejected by local server");
374: return 'no_host';
375: }
376: }
377: }
378:
379: my $tryserver;
380: foreach $tryserver (keys %libserv) {
381: if ($hostdom{$tryserver} eq $udom) {
382: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
383: if ($answer =~ /authorized/) {
384: if ($answer eq 'authorized') {
385: &logthis("User $uname at $udom authorized by $tryserver");
386: return $tryserver;
387: }
388: if ($answer eq 'non_authorized') {
389: &logthis("User $uname at $udom rejected by $tryserver");
390: return 'no_host';
391: }
392: }
393: }
394: }
395: &logthis("User $uname at $udom could not be authenticated");
396: return 'no_host';
397: }
398:
399: # ---------------------- Find the homebase for a user from domain's lib servers
400:
401: sub homeserver {
402: my ($uname,$udom)=@_;
403:
404: my $index="$uname:$udom";
405: if ($homecache{$index}) { return "$homecache{$index}"; }
406:
407: my $tryserver;
408: foreach $tryserver (keys %libserv) {
409: if ($hostdom{$tryserver} eq $udom) {
410: my $answer=reply("home:$udom:$uname",$tryserver);
411: if ($answer eq 'found') {
412: $homecache{$index}=$tryserver;
413: return $tryserver;
414: }
415: }
416: }
417: return 'no_host';
418: }
419:
420: # ------------------------------------- Find the usernames behind a list of IDs
421:
422: sub idget {
423: my ($udom,@ids)=@_;
424: my %returnhash=();
425:
426: my $tryserver;
427: foreach $tryserver (keys %libserv) {
428: if ($hostdom{$tryserver} eq $udom) {
429: my $idlist=join('&',@ids);
430: $idlist=~tr/A-Z/a-z/;
431: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
432: my @answer=();
433: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
434: @answer=split(/\&/,$reply);
435: } ;
436: my $i;
437: for ($i=0;$i<=$#ids;$i++) {
438: if ($answer[$i]) {
439: $returnhash{$ids[$i]}=$answer[$i];
440: }
441: }
442: }
443: }
444: return %returnhash;
445: }
446:
447: # ------------------------------------- Find the IDs behind a list of usernames
448:
449: sub idrget {
450: my ($udom,@unames)=@_;
451: my %returnhash=();
452: map {
453: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
454: } @unames;
455: return %returnhash;
456: }
457:
458: # ------------------------------- Store away a list of names and associated IDs
459:
460: sub idput {
461: my ($udom,%ids)=@_;
462: my %servers=();
463: map {
464: my $uhom=&homeserver($_,$udom);
465: if ($uhom ne 'no_host') {
466: my $id=&escape($ids{$_});
467: $id=~tr/A-Z/a-z/;
468: my $unam=&escape($_);
469: if ($servers{$uhom}) {
470: $servers{$uhom}.='&'.$id.'='.$unam;
471: } else {
472: $servers{$uhom}=$id.'='.$unam;
473: }
474: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
475: }
476: } keys %ids;
477: map {
478: &critical('idput:'.$udom.':'.$servers{$_},$_);
479: } keys %servers;
480: }
481:
482: # ------------------------------------- Find the section of student in a course
483:
484: sub usection {
485: my ($udom,$unam,$courseid)=@_;
486: $courseid=~s/\_/\//g;
487: $courseid=~s/^(\w)/\/$1/;
488: map {
489: my ($key,$value)=split(/\=/,$_);
490: $key=&unescape($key);
491: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
492: my $section=$1;
493: if ($key eq $courseid.'_st') { $section=''; }
494: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
495: my $now=time;
496: my $notactive=0;
497: if ($start) {
498: if ($now<$start) { $notactive=1; }
499: }
500: if ($end) {
501: if ($now>$end) { $notactive=1; }
502: }
503: unless ($notactive) { return $section; }
504: }
505: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
506: &homeserver($unam,$udom)));
507: return '-1';
508: }
509:
510: # ------------------------------------- Read an entry from a user's environment
511:
512: sub userenvironment {
513: my ($udom,$unam,@what)=@_;
514: my %returnhash=();
515: my @answer=split(/\&/,
516: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
517: &homeserver($unam,$udom)));
518: my $i;
519: for ($i=0;$i<=$#what;$i++) {
520: $returnhash{$what[$i]}=&unescape($answer[$i]);
521: }
522: return %returnhash;
523: }
524:
525: # ----------------------------- Subscribe to a resource, return URL if possible
526:
527: sub subscribe {
528: my $fname=shift;
529: my $author=$fname;
530: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
531: my ($udom,$uname)=split(/\//,$author);
532: my $home=homeserver($uname,$udom);
533: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
534: return 'not_found';
535: }
536: my $answer=reply("sub:$fname",$home);
537: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
538: $answer.=' by '.$home;
539: }
540: return $answer;
541: }
542:
543: # -------------------------------------------------------------- Replicate file
544:
545: sub repcopy {
546: my $filename=shift;
547: $filename=~s/\/+/\//g;
548: my $transname="$filename.in.transfer";
549: if ((-e $filename) || (-e $transname)) { return OK; }
550: my $remoteurl=subscribe($filename);
551: if ($remoteurl =~ /^con_lost by/) {
552: &logthis("Subscribe returned $remoteurl: $filename");
553: return HTTP_SERVICE_UNAVAILABLE;
554: } elsif ($remoteurl eq 'not_found') {
555: &logthis("Subscribe returned not_found: $filename");
556: return HTTP_NOT_FOUND;
557: } elsif ($remoteurl =~ /^rejected by/) {
558: &logthis("Subscribe returned $remoteurl: $filename");
559: return FORBIDDEN;
560: } elsif ($remoteurl eq 'directory') {
561: return OK;
562: } else {
563: my @parts=split(/\//,$filename);
564: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
565: if ($path ne "$perlvar{'lonDocRoot'}/res") {
566: &logthis("Malconfiguration for replication: $filename");
567: return HTTP_BAD_REQUEST;
568: }
569: my $count;
570: for ($count=5;$count<$#parts;$count++) {
571: $path.="/$parts[$count]";
572: if ((-e $path)!=1) {
573: mkdir($path,0777);
574: }
575: }
576: my $ua=new LWP::UserAgent;
577: my $request=new HTTP::Request('GET',"$remoteurl");
578: my $response=$ua->request($request,$transname);
579: if ($response->is_error()) {
580: unlink($transname);
581: my $message=$response->status_line;
582: &logthis("<font color=blue>WARNING:"
583: ." LWP get: $message: $filename</font>");
584: return HTTP_SERVICE_UNAVAILABLE;
585: } else {
586: if ($remoteurl!~/\.meta$/) {
587: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
588: my $mresponse=$ua->request($mrequest,$filename.'.meta');
589: if ($mresponse->is_error()) {
590: unlink($filename.'.meta');
591: &logthis(
592: "<font color=yellow>INFO: No metadata: $filename</font>");
593: }
594: }
595: rename($transname,$filename);
596: return OK;
597: }
598: }
599: }
600:
601: # --------------------------------------------------------- Server Side Include
602:
603: sub ssi {
604:
605: my ($fn,%form)=@_;
606:
607: my $ua=new LWP::UserAgent;
608:
609: my $request;
610:
611: if (%form) {
612: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
613: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
614: } else {
615: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
616: }
617:
618: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
619: my $response=$ua->request($request);
620:
621: return $response->content;
622: }
623:
624: # ------------------------------------------------------------------------- Log
625:
626: sub log {
627: my ($dom,$nam,$hom,$what)=@_;
628: return critical("log:$dom:$nam:$what",$hom);
629: }
630:
631: # --------------------------------------------- Set Expire Date for Spreadsheet
632:
633: sub expirespread {
634: my ($uname,$udom,$stype,$usymb)=@_;
635: my $cid=$ENV{'request.course.id'};
636: if ($cid) {
637: my $now=time;
638: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
639: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
640: $ENV{'course.'.$cid.'.num'}.
641: ':nohist_expirationdates:'.
642: &escape($key).'='.$now,
643: $ENV{'course.'.$cid.'.home'})
644: }
645: return 'ok';
646: }
647:
648: # ----------------------------------------------------- Devalidate Spreadsheets
649:
650: sub devalidate {
651: my $symb=shift;
652: my $cid=$ENV{'request.course.id'};
653: if ($cid) {
654: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
655: my $status=
656: &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
657: $ENV{'course.'.$cid.'.num'}.
658: ':nohist_calculatedsheets:'.
659: &escape($key.'studentcalc:'),
660: $ENV{'course.'.$cid.'.home'})
661: .' '.
662: &reply('del:'.$ENV{'user.domain'}.':'.
663: $ENV{'user.name'}.
664: ':nohist_calculatedsheets_'.$cid.':'.
665: &escape($key.'assesscalc:'.$symb),
666: $ENV{'user.home'});
667: unless ($status eq 'ok ok') {
668: &logthis('Could not devalidate spreadsheet '.
669: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
670: $symb.': '.$status);
671: }
672: }
673: }
674:
675: # ----------------------------------------------------------------------- Store
676:
677: sub store {
678: my %storehash=@_;
679: my $symb;
680: unless ($symb=&symbread()) { return ''; }
681:
682: &devalidate($symb);
683:
684: $symb=escape($symb);
685: my $namespace;
686: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
687: my $namevalue='';
688: map {
689: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
690: } keys %storehash;
691: $namevalue=~s/\&$//;
692: return reply(
693: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
694: "$ENV{'user.home'}");
695: }
696:
697: # -------------------------------------------------------------- Critical Store
698:
699: sub cstore {
700: my %storehash=@_;
701: my $symb;
702: unless ($symb=&symbread()) { return ''; }
703:
704: &devalidate($symb);
705:
706: $symb=escape($symb);
707: my $namespace;
708: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
709: my $namevalue='';
710: map {
711: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
712: } keys %storehash;
713: $namevalue=~s/\&$//;
714: return critical(
715: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
716: "$ENV{'user.home'}");
717: }
718:
719: # --------------------------------------------------------------------- Restore
720:
721: sub restore {
722: my $symb;
723: unless ($symb=escape(&symbread())) { return ''; }
724: my $namespace;
725: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
726: my $answer=reply(
727: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
728: "$ENV{'user.home'}");
729: my %returnhash=();
730: map {
731: my ($name,$value)=split(/\=/,$_);
732: $returnhash{&unescape($name)}=&unescape($value);
733: } split(/\&/,$answer);
734: my $version;
735: for ($version=1;$version<=$returnhash{'version'};$version++) {
736: map {
737: $returnhash{$_}=$returnhash{$version.':'.$_};
738: } split(/\:/,$returnhash{$version.':keys'});
739: }
740: return %returnhash;
741: }
742:
743: # ---------------------------------------------------------- Course Description
744:
745: sub coursedescription {
746: my $courseid=shift;
747: $courseid=~s/^\///;
748: $courseid=~s/\_/\//g;
749: my ($cdomain,$cnum)=split(/\//,$courseid);
750: my $chome=homeserver($cnum,$cdomain);
751: if ($chome ne 'no_host') {
752: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
753: if ($rep ne 'con_lost') {
754: my $normalid=$cdomain.'_'.$cnum;
755: my %envhash=();
756: my %returnhash=('home' => $chome,
757: 'domain' => $cdomain,
758: 'num' => $cnum);
759: map {
760: my ($name,$value)=split(/\=/,$_);
761: $name=&unescape($name);
762: $value=&unescape($value);
763: $returnhash{$name}=$value;
764: $envhash{'course.'.$normalid.'.'.$name}=$value;
765: } split(/\&/,$rep);
766: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
767: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
768: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
769: $envhash{'course.'.$normalid.'.last_cache'}=time;
770: $envhash{'course.'.$normalid.'.home'}=$chome;
771: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
772: $envhash{'course.'.$normalid.'.num'}=$cnum;
773: &appenv(%envhash);
774: return %returnhash;
775: }
776: }
777: return ();
778: }
779:
780: # -------------------------------------------------------- Get user privileges
781:
782: sub rolesinit {
783: my ($domain,$username,$authhost)=@_;
784: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
785: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
786: my %allroles=();
787: my %thesepriv=();
788: my $now=time;
789: my $userroles="user.login.time=$now\n";
790: my $thesestr;
791:
792: if ($rolesdump ne '') {
793: map {
794: if ($_!~/^rolesdef\&/) {
795: my ($area,$role)=split(/=/,$_);
796: $area=~s/\_\w\w$//;
797: my ($trole,$tend,$tstart)=split(/_/,$role);
798: $userroles.='user.role.'.$trole.'.'.$area.'='.
799: $tstart.'.'.$tend."\n";
800: if ($tend!=0) {
801: if ($tend<$now) {
802: $trole='';
803: }
804: }
805: if ($tstart!=0) {
806: if ($tstart>$now) {
807: $trole='';
808: }
809: }
810: if (($area ne '') && ($trole ne '')) {
811: my $spec=$trole.'.'.$area;
812: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
813: if ($trole =~ /^cr\//) {
814: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
815: my $homsvr=homeserver($rauthor,$rdomain);
816: if ($hostname{$homsvr} ne '') {
817: my $roledef=
818: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
819: $homsvr);
820: if (($roledef ne 'con_lost') && ($roledef ne '')) {
821: my ($syspriv,$dompriv,$coursepriv)=
822: split(/\_/,unescape($roledef));
823: $allroles{'cm./'}.=':'.$syspriv;
824: $allroles{$spec.'./'}.=':'.$syspriv;
825: if ($tdomain ne '') {
826: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
827: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
828: if ($trest ne '') {
829: $allroles{'cm.'.$area}.=':'.$coursepriv;
830: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
831: }
832: }
833: }
834: }
835: } else {
836: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
837: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
838: if ($tdomain ne '') {
839: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
840: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
841: if ($trest ne '') {
842: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
843: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
844: }
845: }
846: }
847: }
848: }
849: } split(/&/,$rolesdump);
850: map {
851: %thesepriv=();
852: map {
853: if ($_ ne '') {
854: my ($privilege,$restrictions)=split(/&/,$_);
855: if ($restrictions eq '') {
856: $thesepriv{$privilege}='F';
857: } else {
858: if ($thesepriv{$privilege} ne 'F') {
859: $thesepriv{$privilege}.=$restrictions;
860: }
861: }
862: }
863: } split(/:/,$allroles{$_});
864: $thesestr='';
865: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
866: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
867: } keys %allroles;
868: }
869: return $userroles;
870: }
871:
872: # --------------------------------------------------------------- get interface
873:
874: sub get {
875: my ($namespace,@storearr)=@_;
876: my $items='';
877: map {
878: $items.=escape($_).'&';
879: } @storearr;
880: $items=~s/\&$//;
881: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
882: $ENV{'user.home'});
883: my @pairs=split(/\&/,$rep);
884: my %returnhash=();
885: my $i=0;
886: map {
887: $returnhash{$_}=unescape($pairs[$i]);
888: $i++;
889: } @storearr;
890: return %returnhash;
891: }
892:
893: # --------------------------------------------------------------- del interface
894:
895: sub del {
896: my ($namespace,@storearr)=@_;
897: my $items='';
898: map {
899: $items.=escape($_).'&';
900: } @storearr;
901: $items=~s/\&$//;
902: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
903: $ENV{'user.home'});
904: }
905:
906: # -------------------------------------------------------------- dump interface
907:
908: sub dump {
909: my $namespace=shift;
910: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
911: $ENV{'user.home'});
912: my @pairs=split(/\&/,$rep);
913: my %returnhash=();
914: map {
915: my ($key,$value)=split(/=/,$_);
916: $returnhash{unescape($key)}=unescape($value);
917: } @pairs;
918: return %returnhash;
919: }
920:
921: # --------------------------------------------------------------- put interface
922:
923: sub put {
924: my ($namespace,%storehash)=@_;
925: my $items='';
926: map {
927: $items.=escape($_).'='.escape($storehash{$_}).'&';
928: } keys %storehash;
929: $items=~s/\&$//;
930: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
931: $ENV{'user.home'});
932: }
933:
934: # ------------------------------------------------------ critical put interface
935:
936: sub cput {
937: my ($namespace,%storehash)=@_;
938: my $items='';
939: map {
940: $items.=escape($_).'='.escape($storehash{$_}).'&';
941: } keys %storehash;
942: $items=~s/\&$//;
943: return critical
944: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
945: $ENV{'user.home'});
946: }
947:
948: # -------------------------------------------------------------- eget interface
949:
950: sub eget {
951: my ($namespace,@storearr)=@_;
952: my $items='';
953: map {
954: $items.=escape($_).'&';
955: } @storearr;
956: $items=~s/\&$//;
957: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
958: $ENV{'user.home'});
959: my @pairs=split(/\&/,$rep);
960: my %returnhash=();
961: my $i=0;
962: map {
963: $returnhash{$_}=unescape($pairs[$i]);
964: $i++;
965: } @storearr;
966: return %returnhash;
967: }
968:
969: # ------------------------------------------------- Check for a user privilege
970:
971: sub allowed {
972: my ($priv,$uri)=@_;
973: $uri=&declutter($uri);
974:
975: # Free bre access to adm and meta resources
976:
977: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
978: return 'F';
979: }
980:
981: my $thisallowed='';
982: my $statecond=0;
983: my $courseprivid='';
984:
985: # Course
986:
987: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
988: $thisallowed.=$1;
989: }
990:
991: # Domain
992:
993: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
994: =~/$priv\&([^\:]*)/) {
995: $thisallowed.=$1;
996: }
997:
998: # Course: uri itself is a course
999: my $courseuri=$uri;
1000: $courseuri=~s/\_(\d)/\/$1/;
1001: $courseuri=~s/^([^\/])/\/$1/;
1002:
1003: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1004: =~/$priv\&([^\:]*)/) {
1005: $thisallowed.=$1;
1006: }
1007:
1008: # Full access at system, domain or course-wide level? Exit.
1009:
1010: if ($thisallowed=~/F/) {
1011: return 'F';
1012: }
1013:
1014: # If this is generating or modifying users, exit with special codes
1015:
1016: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1017: return $thisallowed;
1018: }
1019: #
1020: # Gathered so far: system, domain and course wide privileges
1021: #
1022: # Course: See if uri or referer is an individual resource that is part of
1023: # the course
1024:
1025: if ($ENV{'request.course.id'}) {
1026: $courseprivid=$ENV{'request.course.id'};
1027: if ($ENV{'request.course.sec'}) {
1028: $courseprivid.='/'.$ENV{'request.course.sec'};
1029: }
1030: $courseprivid=~s/\_/\//;
1031: my $checkreferer=1;
1032: my @uriparts=split(/\//,$uri);
1033: my $filename=$uriparts[$#uriparts];
1034: my $pathname=$uri;
1035: $pathname=~s/\/$filename$//;
1036: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1037: /\&$filename\:([\d\|]+)\&/) {
1038: $statecond=$1;
1039: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1040: =~/$priv\&([^\:]*)/) {
1041: $thisallowed.=$1;
1042: $checkreferer=0;
1043: }
1044: }
1045:
1046: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1047: my $refuri=$ENV{'HTTP_REFERER'};
1048: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1049: $refuri=&declutter($refuri);
1050: my @uriparts=split(/\//,$refuri);
1051: my $filename=$uriparts[$#uriparts];
1052: my $pathname=$refuri;
1053: $pathname=~s/\/$filename$//;
1054: my @filenameparts=split(/\./,$uri);
1055: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1056: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1057: /\&$filename\:([\d\|]+)\&/) {
1058: my $refstatecond=$1;
1059: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1060: =~/$priv\&([^\:]*)/) {
1061: $thisallowed.=$1;
1062: $uri=$refuri;
1063: $statecond=$refstatecond;
1064: }
1065: }
1066: }
1067: }
1068: }
1069:
1070: #
1071: # Gathered now: all privileges that could apply, and condition number
1072: #
1073: #
1074: # Full or no access?
1075: #
1076:
1077: if ($thisallowed=~/F/) {
1078: return 'F';
1079: }
1080:
1081: unless ($thisallowed) {
1082: return '';
1083: }
1084:
1085: # Restrictions exist, deal with them
1086: #
1087: # C:according to course preferences
1088: # R:according to resource settings
1089: # L:unless locked
1090: # X:according to user session state
1091: #
1092:
1093: # Possibly locked functionality, check all courses
1094: # Locks might take effect only after 10 minutes cache expiration for other
1095: # courses, and 2 minutes for current course
1096:
1097: my $envkey;
1098: if ($thisallowed=~/L/) {
1099: foreach $envkey (keys %ENV) {
1100: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1101: my $courseid=$2;
1102: my $roleid=$1.'.'.$2;
1103: $courseid=~s/^\///;
1104: my $expiretime=600;
1105: if ($ENV{'request.role'} eq $roleid) {
1106: $expiretime=120;
1107: }
1108: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1109: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1110: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1111: &coursedescription($courseid);
1112: }
1113: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1114: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1115: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1116: &log($ENV{'user.domain'},$ENV{'user.name'},
1117: $ENV{'user.host'},
1118: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1119: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1120: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1121: return '';
1122: }
1123: }
1124: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1125: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1126: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1127: &log($ENV{'user.domain'},$ENV{'user.name'},
1128: $ENV{'user.host'},
1129: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1130: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1131: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1132: return '';
1133: }
1134: }
1135: }
1136: }
1137: }
1138:
1139: #
1140: # Rest of the restrictions depend on selected course
1141: #
1142:
1143: unless ($ENV{'request.course.id'}) {
1144: return '1';
1145: }
1146:
1147: #
1148: # Now user is definitely in a course
1149: #
1150:
1151:
1152: # Course preferences
1153:
1154: if ($thisallowed=~/C/) {
1155: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1156: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1157: =~/\,$rolecode\,/) {
1158: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1159: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1160: $ENV{'request.course.id'});
1161: return '';
1162: }
1163: }
1164:
1165: # Resource preferences
1166:
1167: if ($thisallowed=~/R/) {
1168: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1169: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1170: if (-e $filename) {
1171: my @content;
1172: {
1173: my $fh=Apache::File->new($filename);
1174: @content=<$fh>;
1175: }
1176: if (join('',@content)=~
1177: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1178: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1179: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1180: return '';
1181:
1182: }
1183: }
1184: }
1185:
1186: # Restricted by state?
1187:
1188: if ($thisallowed=~/X/) {
1189: if (&condval($statecond)) {
1190: return '2';
1191: } else {
1192: return '';
1193: }
1194: }
1195:
1196: return 'F';
1197: }
1198:
1199: # ----------------------------------------------------------------- Define Role
1200:
1201: sub definerole {
1202: if (allowed('mcr','/')) {
1203: my ($rolename,$sysrole,$domrole,$courole)=@_;
1204: map {
1205: my ($crole,$cqual)=split(/\&/,$_);
1206: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1207: if ($pr{'cr:s'}=~/$crole\&/) {
1208: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1209: return "refused:s:$crole&$cqual";
1210: }
1211: }
1212: } split('/',$sysrole);
1213: map {
1214: my ($crole,$cqual)=split(/\&/,$_);
1215: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1216: if ($pr{'cr:d'}=~/$crole\&/) {
1217: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1218: return "refused:d:$crole&$cqual";
1219: }
1220: }
1221: } split('/',$domrole);
1222: map {
1223: my ($crole,$cqual)=split(/\&/,$_);
1224: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1225: if ($pr{'cr:c'}=~/$crole\&/) {
1226: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1227: return "refused:c:$crole&$cqual";
1228: }
1229: }
1230: } split('/',$courole);
1231: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1232: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1233: "rolesdef_$rolename=".
1234: escape($sysrole.'_'.$domrole.'_'.$courole);
1235: return reply($command,$ENV{'user.home'});
1236: } else {
1237: return 'refused';
1238: }
1239: }
1240:
1241: # ---------------- Make a metadata query against the network of library servers
1242:
1243: sub metadata_query {
1244: my ($query)=@_;
1245: # need to put in a loop here and return list
1246: my $reply=&reply("querysend:".&escape($query),'msul3');
1247: }
1248:
1249: # ------------------------------------------------------------------ Plain Text
1250:
1251: sub plaintext {
1252: my $short=shift;
1253: return $prp{$short};
1254: }
1255:
1256: # ------------------------------------------------------------------ Plain Text
1257:
1258: sub fileembstyle {
1259: my $ending=shift;
1260: return $fe{$ending};
1261: }
1262:
1263: # ------------------------------------------------------------ Description Text
1264:
1265: sub filedescription {
1266: my $ending=shift;
1267: return $fd{$ending};
1268: }
1269:
1270: # ----------------------------------------------------------------- Assign Role
1271:
1272: sub assignrole {
1273: my ($udom,$uname,$url,$role,$end,$start)=@_;
1274: my $mrole;
1275: if ($role =~ /^cr\//) {
1276: unless (&allowed('ccr',$url)) {
1277: &logthis('Refused custom assignrole: '.
1278: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1279: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1280: return 'refused';
1281: }
1282: $mrole='cr';
1283: } else {
1284: my $cwosec=$url;
1285: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1286: unless (&allowed('c'.$role,$cwosec)) {
1287: &logthis('Refused assignrole: '.
1288: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1289: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1290: return 'refused';
1291: }
1292: $mrole=$role;
1293: }
1294: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1295: "$udom:$uname:$url".'_'."$mrole=$role";
1296: if ($end) { $command.='_'.$end; }
1297: if ($start) {
1298: if ($end) {
1299: $command.='_'.$start;
1300: } else {
1301: $command.='_0_'.$start;
1302: }
1303: }
1304: return &reply($command,&homeserver($uname,$udom));
1305: }
1306:
1307: # --------------------------------------------------------------- Modify a user
1308:
1309:
1310: sub modifyuser {
1311: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1312: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1313: $umode.', '.$first.', '.$middle.', '.
1314: $last.', '.$gene.' by '.
1315: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1316: my $uhome=&homeserver($uname,$udom);
1317: # ----------------------------------------------------------------- Create User
1318: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1319: my $unhome='';
1320: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1321: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1322: } else {
1323: my $tryserver;
1324: my $loadm=10000000;
1325: foreach $tryserver (keys %libserv) {
1326: if ($hostdom{$tryserver} eq $udom) {
1327: my $answer=reply('load',$tryserver);
1328: if (($answer=~/\d+/) && ($answer<$loadm)) {
1329: $loadm=$answer;
1330: $unhome=$tryserver;
1331: }
1332: }
1333: }
1334: }
1335: if (($unhome eq '') || ($unhome eq 'no_host')) {
1336: return 'error: find home';
1337: }
1338: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1339: &escape($upass),$unhome);
1340: unless ($reply eq 'ok') {
1341: return 'error: '.$reply;
1342: }
1343: $uhome=&homeserver($uname,$udom);
1344: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1345: return 'error: verify home';
1346: }
1347: }
1348: # ---------------------------------------------------------------------- Add ID
1349: if ($uid) {
1350: $uid=~tr/A-Z/a-z/;
1351: my %uidhash=&idrget($udom,$uname);
1352: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1353: unless ($uid eq $uidhash{$uname}) {
1354: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1355: }
1356: } else {
1357: &idput($udom,($uname => $uid));
1358: }
1359: }
1360: # -------------------------------------------------------------- Add names, etc
1361: my $names=&reply('get:'.$udom.':'.$uname.
1362: ':environment:firstname&middlename&lastname&generation',
1363: $uhome);
1364: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1365: if ($first) { $efirst = &escape($first); }
1366: if ($middle) { $emiddle = &escape($middle); }
1367: if ($last) { $elast = &escape($last); }
1368: if ($gene) { $egene = &escape($gene); }
1369: my $reply=&reply('put:'.$udom.':'.$uname.
1370: ':environment:firstname='.$efirst.
1371: '&middlename='.$emiddle.
1372: '&lastname='.$elast.
1373: '&generation='.$egene,$uhome);
1374: if ($reply ne 'ok') {
1375: return 'error: '.$reply;
1376: }
1377: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1378: $umode.', '.$first.', '.$middle.', '.
1379: $last.', '.$gene.' by '.
1380: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1381: return 'ok';
1382: }
1383:
1384: # -------------------------------------------------------------- Modify student
1385:
1386: sub modifystudent {
1387: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1388: $end,$start)=@_;
1389: my $cid='';
1390: unless ($cid=$ENV{'request.course.id'}) {
1391: return 'not_in_class';
1392: }
1393: # --------------------------------------------------------------- Make the user
1394: my $reply=&modifyuser
1395: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1396: unless ($reply eq 'ok') { return $reply; }
1397: my $uhome=&homeserver($uname,$udom);
1398: if (($uhome eq '') || ($uhome eq 'no_host')) {
1399: return 'error: no such user';
1400: }
1401: # -------------------------------------------------- Add student to course list
1402: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1403: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1404: &escape($uname.':'.$udom).'='.
1405: &escape($end.':'.$start),
1406: $ENV{'course.'.$cid.'.home'});
1407: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1408: return 'error: '.$reply;
1409: }
1410: # ---------------------------------------------------- Add student role to user
1411: my $uurl='/'.$cid;
1412: $uurl=~s/\_/\//g;
1413: if ($usec) {
1414: $uurl.='/'.$usec;
1415: }
1416: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1417: }
1418:
1419: # ------------------------------------------------- Write to course preferences
1420:
1421: sub writecoursepref {
1422: my ($courseid,%prefs)=@_;
1423: $courseid=~s/^\///;
1424: $courseid=~s/\_/\//g;
1425: my ($cdomain,$cnum)=split(/\//,$courseid);
1426: my $chome=homeserver($cnum,$cdomain);
1427: if (($chome eq '') || ($chome eq 'no_host')) {
1428: return 'error: no such course';
1429: }
1430: my $cstring='';
1431: map {
1432: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1433: } keys %prefs;
1434: $cstring=~s/\&$//;
1435: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1436: }
1437:
1438: # ---------------------------------------------------------- Make/modify course
1439:
1440: sub createcourse {
1441: my ($udom,$description,$url)=@_;
1442: $url=&declutter($url);
1443: my $cid='';
1444: unless (&allowed('ccc',$ENV{'user.domain'})) {
1445: return 'refused';
1446: }
1447: unless ($udom eq $ENV{'user.domain'}) {
1448: return 'refused';
1449: }
1450: # ------------------------------------------------------------------- Create ID
1451: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1452: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1453: # ----------------------------------------------- Make sure that does not exist
1454: my $uhome=&homeserver($uname,$udom);
1455: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1456: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1457: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1458: $uhome=&homeserver($uname,$udom);
1459: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1460: return 'error: unable to generate unique course-ID';
1461: }
1462: }
1463: # ------------------------------------------------------------- Make the course
1464: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1465: $ENV{'user.home'});
1466: unless ($reply eq 'ok') { return 'error: '.$reply; }
1467: my $uhome=&homeserver($uname,$udom);
1468: if (($uhome eq '') || ($uhome eq 'no_host')) {
1469: return 'error: no such course';
1470: }
1471: &writecoursepref($udom.'_'.$uname,
1472: ('description' => $description,
1473: 'url' => $url));
1474: return '/'.$udom.'/'.$uname;
1475: }
1476:
1477: # ---------------------------------------------------------- Assign Custom Role
1478:
1479: sub assigncustomrole {
1480: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1481: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1482: $end,$start);
1483: }
1484:
1485: # ----------------------------------------------------------------- Revoke Role
1486:
1487: sub revokerole {
1488: my ($udom,$uname,$url,$role)=@_;
1489: my $now=time;
1490: return &assignrole($udom,$uname,$url,$role,$now);
1491: }
1492:
1493: # ---------------------------------------------------------- Revoke Custom Role
1494:
1495: sub revokecustomrole {
1496: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1497: my $now=time;
1498: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1499: }
1500:
1501: # ------------------------------------------------------------ Directory lister
1502:
1503: sub dirlist {
1504: my $uri=shift;
1505: $uri=~s/^\///;
1506: $uri=~s/\/$//;
1507: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1508: if ($udom) {
1509: if ($uname) {
1510: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1511: homeserver($uname,$udom));
1512: return split(/:/,$listing);
1513: } else {
1514: my $tryserver;
1515: my %allusers=();
1516: foreach $tryserver (keys %libserv) {
1517: if ($hostdom{$tryserver} eq $udom) {
1518: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1519: $tryserver);
1520: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1521: && ($listing ne 'con_lost')) {
1522: map {
1523: my ($entry,@stat)=split(/&/,$_);
1524: $allusers{$entry}=1;
1525: } split(/:/,$listing);
1526: }
1527: }
1528: }
1529: my $alluserstr='';
1530: map {
1531: $alluserstr.=$_.'&user:';
1532: } sort keys %allusers;
1533: $alluserstr=~s/:$//;
1534: return split(/:/,$alluserstr);
1535: }
1536: } else {
1537: my $tryserver;
1538: my %alldom=();
1539: foreach $tryserver (keys %libserv) {
1540: $alldom{$hostdom{$tryserver}}=1;
1541: }
1542: my $alldomstr='';
1543: map {
1544: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1545: } sort keys %alldom;
1546: $alldomstr=~s/:$//;
1547: return split(/:/,$alldomstr);
1548: }
1549: }
1550:
1551: # -------------------------------------------------------- Value of a Condition
1552:
1553: sub directcondval {
1554: my $number=shift;
1555: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1556: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1557: } else {
1558: return 2;
1559: }
1560: }
1561:
1562: sub condval {
1563: my $condidx=shift;
1564: my $result=0;
1565: my $allpathcond='';
1566: map {
1567: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1568: $allpathcond.=
1569: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1570: }
1571: } split(/\|/,$condidx);
1572: $allpathcond=~s/\|$//;
1573: if ($ENV{'request.course.id'}) {
1574: if ($allpathcond) {
1575: my $operand='|';
1576: my @stack;
1577: map {
1578: if ($_ eq '(') {
1579: push @stack,($operand,$result)
1580: } elsif ($_ eq ')') {
1581: my $before=pop @stack;
1582: if (pop @stack eq '&') {
1583: $result=$result>$before?$before:$result;
1584: } else {
1585: $result=$result>$before?$result:$before;
1586: }
1587: } elsif (($_ eq '&') || ($_ eq '|')) {
1588: $operand=$_;
1589: } else {
1590: my $new=directcondval($_);
1591: if ($operand eq '&') {
1592: $result=$result>$new?$new:$result;
1593: } else {
1594: $result=$result>$new?$result:$new;
1595: }
1596: }
1597: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1598: }
1599: }
1600: return $result;
1601: }
1602:
1603: # --------------------------------------------------------- Value of a Variable
1604:
1605: sub EXT {
1606: my $varname=shift;
1607: unless ($varname) { return ''; }
1608: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1609: my $rest;
1610: if ($therest[0]) {
1611: $rest=join('.',@therest);
1612: } else {
1613: $rest='';
1614: }
1615: my $qualifierrest=$qualifier;
1616: if ($rest) { $qualifierrest.='.'.$rest; }
1617: my $spacequalifierrest=$space;
1618: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1619: if ($realm eq 'user') {
1620: # --------------------------------------------------------------- user.resource
1621: if ($space eq 'resource') {
1622: my %restored=&restore;
1623: return $restored{$qualifierrest};
1624: # ----------------------------------------------------------------- user.access
1625: } elsif ($space eq 'access') {
1626: return &allowed($qualifier,$rest);
1627: # ------------------------------------------ user.preferences, user.environment
1628: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1629: return $ENV{join('.',('environment',$qualifierrest))};
1630: # ----------------------------------------------------------------- user.course
1631: } elsif ($space eq 'course') {
1632: return $ENV{join('.',('request.course',$qualifier))};
1633: # ------------------------------------------------------------------- user.role
1634: } elsif ($space eq 'role') {
1635: my ($role,$where)=split(/\./,$ENV{'request.role'});
1636: if ($qualifier eq 'value') {
1637: return $role;
1638: } elsif ($qualifier eq 'extent') {
1639: return $where;
1640: }
1641: # ----------------------------------------------------------------- user.domain
1642: } elsif ($space eq 'domain') {
1643: return $ENV{'user.domain'};
1644: # ------------------------------------------------------------------- user.name
1645: } elsif ($space eq 'name') {
1646: return $ENV{'user.name'};
1647: # ---------------------------------------------------- Any other user namespace
1648: } else {
1649: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1650: my %reply=&get($space,$item);
1651: return $reply{$item};
1652: }
1653: } elsif ($realm eq 'request') {
1654: # ------------------------------------------------------------- request.browser
1655: if ($space eq 'browser') {
1656: return $ENV{'browser.'.$qualifier};
1657: # ------------------------------------------------------------ request.filename
1658: } else {
1659: return $ENV{'request.'.$spacequalifierrest};
1660: }
1661: } elsif ($realm eq 'course') {
1662: # ---------------------------------------------------------- course.description
1663: my $section='';
1664: if ($ENV{'request.course.sec'}) {
1665: $section='_'.$ENV{'request.course.sec'};
1666: }
1667: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1668: $spacequalifierrest};
1669: } elsif ($realm eq 'resource') {
1670: if ($ENV{'request.course.id'}) {
1671: # ----------------------------------------------------- Cascading lookup scheme
1672: my $symbp=&symbread();
1673: my $mapp=(split(/\_\_\_/,$symbp))[0];
1674:
1675: my $symbparm=$symbp.'.'.$spacequalifierrest;
1676: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1677:
1678: my $seclevel=
1679: $ENV{'request.course.id'}.'.['.
1680: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1681: my $seclevelr=
1682: $ENV{'request.course.id'}.'.['.
1683: $ENV{'request.course.sec'}.'].'.$symbparm;
1684: my $seclevelm=
1685: $ENV{'request.course.id'}.'.['.
1686: $ENV{'request.course.sec'}.'].'.$mapparm;
1687:
1688: my $courselevel=
1689: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1690: my $courselevelr=
1691: $ENV{'request.course.id'}.'.'.$symbparm;
1692: my $courselevelm=
1693: $ENV{'request.course.id'}.'.'.$mapparm;
1694:
1695: # ----------------------------------------------------------- first, check user
1696: my %resourcedata=get('resourcedata',
1697: ($courselevelr,$courselevelm,$courselevel));
1698: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1699: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1700:
1701: if ($resourcedata{$courselevelr}) {
1702: return $resourcedata{$courselevelr}; }
1703: if ($resourcedata{$courselevelm}) {
1704: return $resourcedata{$courselevelm}; }
1705: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1706:
1707: } else {
1708: if ($resourcedata{$courselevelr}!~/No such file/) {
1709: &logthis("<font color=blue>WARNING:".
1710: " Trying to get resource data for ".$ENV{'user.name'}." at "
1711: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1712: "</font>");
1713: }
1714: }
1715:
1716: # -------------------------------------------------------- second, check course
1717:
1718: my $reply=&reply('get:'.
1719: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1720: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1721: ':resourcedata:'.
1722: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1723: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1724: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1725: if ($reply!~/^error\:/) {
1726: map {
1727: if ($_) { return &unescape($_); }
1728: } split(/\&/,$reply);
1729: }
1730: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1731: &logthis("<font color=blue>WARNING:".
1732: " Getting ".$reply." asking for ".$varname." for ".
1733: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1734: ' at '.
1735: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1736: ' from '.
1737: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1738: "</font>");
1739: }
1740: # ------------------------------------------------------ third, check map parms
1741: my %parmhash=();
1742: my $thisparm='';
1743: if (tie(%parmhash,'GDBM_File',
1744: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1745: $thisparm=$parmhash{$symbparm};
1746: untie(%parmhash);
1747: }
1748: if ($thisparm) { return $thisparm; }
1749: }
1750:
1751: # --------------------------------------------- last, look in resource metadata
1752:
1753: $spacequalifierrest=~s/\./\_/;
1754: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1755: if ($metadata) { return $metadata; }
1756: $metadata=&metadata($ENV{'request.filename'},
1757: 'parameter_'.$spacequalifierrest);
1758: if ($metadata) { return $metadata; }
1759:
1760: # ---------------------------------------------------- Any other user namespace
1761: } elsif ($realm eq 'environment') {
1762: # ----------------------------------------------------------------- environment
1763: return $ENV{$spacequalifierrest};
1764: } elsif ($realm eq 'system') {
1765: # ----------------------------------------------------------------- system.time
1766: if ($space eq 'time') {
1767: return time;
1768: }
1769: }
1770: return '';
1771: }
1772:
1773: # ---------------------------------------------------------------- Get metadata
1774:
1775: sub metadata {
1776: my ($uri,$what)=@_;
1777:
1778: $uri=&declutter($uri);
1779: my $filename=$uri;
1780: $uri=~s/\.meta$//;
1781: unless ($metacache{$uri.':keys'}) {
1782: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1783: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1784: my $parser=HTML::TokeParser->new(\$metastring);
1785: my $token;
1786: while ($token=$parser->get_token) {
1787: if ($token->[0] eq 'S') {
1788: my $entry=$token->[1];
1789: my $unikey=$entry;
1790: if (defined($token->[2]->{'part'})) {
1791: $unikey.='_'.$token->[2]->{'part'};
1792: }
1793: if (defined($token->[2]->{'name'})) {
1794: $unikey.='_'.$token->[2]->{'name'};
1795: }
1796: if ($metacache{$uri.':keys'}) {
1797: $metacache{$uri.':keys'}.=','.$unikey;
1798: } else {
1799: $metacache{$uri.':keys'}=$unikey;
1800: }
1801: map {
1802: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1803: } @{$token->[3]};
1804: unless (
1805: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1806: ) { $metacache{$uri.':'.$unikey}=
1807: $metacache{$uri.':'.$unikey.'.default'};
1808: }
1809: }
1810: }
1811: }
1812: return $metacache{$uri.':'.$what};
1813: }
1814:
1815: # ------------------------------------------------- Update symbolic store links
1816:
1817: sub symblist {
1818: my ($mapname,%newhash)=@_;
1819: $mapname=declutter($mapname);
1820: my %hash;
1821: if (($ENV{'request.course.fn'}) && (%newhash)) {
1822: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1823: &GDBM_WRCREAT,0640)) {
1824: map {
1825: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1826: } keys %newhash;
1827: if (untie(%hash)) {
1828: return 'ok';
1829: }
1830: }
1831: }
1832: return 'error';
1833: }
1834:
1835: # ------------------------------------------------------ Return symb list entry
1836:
1837: sub symbread {
1838: my $thisfn=shift;
1839: unless ($thisfn) {
1840: $thisfn=$ENV{'request.filename'};
1841: }
1842: $thisfn=declutter($thisfn);
1843: my %hash;
1844: my %bighash;
1845: my $syval='';
1846: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1847: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1848: &GDBM_READER,0640)) {
1849: $syval=$hash{$thisfn};
1850: untie(%hash);
1851: }
1852: # ---------------------------------------------------------- There was an entry
1853: if ($syval) {
1854: unless ($syval=~/\_\d+$/) {
1855: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1856: &appenv('request.ambiguous' => $thisfn);
1857: return '';
1858: }
1859: $syval.=$1;
1860: }
1861: } else {
1862: # ------------------------------------------------------- Was not in symb table
1863: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1864: &GDBM_READER,0640)) {
1865: # ---------------------------------------------- Get ID(s) for current resource
1866: my $ids=$bighash{'ids_/res/'.$thisfn};
1867: unless ($ids) {
1868: $ids=$bighash{'ids_/'.$thisfn};
1869: }
1870: if ($ids) {
1871: # ------------------------------------------------------------------- Has ID(s)
1872: my @possibilities=split(/\,/,$ids);
1873: if ($#possibilities==0) {
1874: # ----------------------------------------------- There is only one possibility
1875: my ($mapid,$resid)=split(/\./,$ids);
1876: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1877: } else {
1878: # ------------------------------------------ There is more than one possibility
1879: my $realpossible=0;
1880: map {
1881: my $file=$bighash{'src_'.$_};
1882: if (&allowed('bre',$file)) {
1883: my ($mapid,$resid)=split(/\./,$_);
1884: if ($bighash{'map_type_'.$mapid} ne 'page') {
1885: $realpossible++;
1886: $syval=declutter($bighash{'map_id_'.$mapid}).
1887: '___'.$resid;
1888: }
1889: }
1890: } @possibilities;
1891: if ($realpossible!=1) { $syval=''; }
1892: }
1893: }
1894: untie(%bighash)
1895: }
1896: }
1897: if ($syval) {
1898: return $syval.'___'.$thisfn;
1899: }
1900: }
1901: &appenv('request.ambiguous' => $thisfn);
1902: return '';
1903: }
1904:
1905: # ---------------------------------------------------------- Return random seed
1906:
1907: sub numval {
1908: my $txt=shift;
1909: $txt=~tr/A-J/0-9/;
1910: $txt=~tr/a-j/0-9/;
1911: $txt=~tr/K-T/0-9/;
1912: $txt=~tr/k-t/0-9/;
1913: $txt=~tr/U-Z/0-5/;
1914: $txt=~tr/u-z/0-5/;
1915: $txt=~s/\D//g;
1916: return int($txt);
1917: }
1918:
1919: sub rndseed {
1920: my $symb;
1921: unless ($symb=&symbread()) { return time; }
1922: {
1923: use integer;
1924: my $symbchck=unpack("%32C*",$symb) << 27;
1925: my $symbseed=numval($symb) << 22;
1926: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1927: my $nameseed=numval($ENV{'user.name'}) << 12;
1928: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1929: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1930: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1931: #uncommenting these lines can break things!
1932: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1933: #&Apache::lonxml::debug("rndseed :$num:$symb");
1934: return $num;
1935: }
1936: }
1937:
1938: sub ireceipt {
1939: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1940: my $cuname=unpack("%32C*",$funame);
1941: my $cudom=unpack("%32C*",$fudom);
1942: my $cucourseid=unpack("%32C*",$fucourseid);
1943: my $cusymb=unpack("%32C*",$fusymb);
1944: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1945: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1946: ($cunique%$cuname+
1947: $cunique%$cudom+
1948: $cusymb%$cuname+
1949: $cusymb%$cudom+
1950: $cucourseid%$cuname+
1951: $cucourseid%$cudom);
1952: }
1953:
1954: sub receipt {
1955: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1956: $ENV{'request.course.id'},&symbread());
1957: }
1958:
1959: # ------------------------------------------------------------ Serves up a file
1960: # returns either the contents of the file or a -1
1961: sub getfile {
1962: my $file=shift;
1963: &repcopy($file);
1964: if (! -e $file ) { return -1; };
1965: my $fh=Apache::File->new($file);
1966: my $a='';
1967: while (<$fh>) { $a .=$_; }
1968: return $a
1969: }
1970:
1971: sub filelocation {
1972: my ($dir,$file) = @_;
1973: my $location;
1974: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1975: if ($file=~m:^/~:) { # is a contruction space reference
1976: $location = $file;
1977: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1978: } else {
1979: $file=~s/^$perlvar{'lonDocRoot'}//;
1980: $file=~s:^/*res::;
1981: if ( !( $file =~ m:^/:) ) {
1982: $location = $dir. '/'.$file;
1983: } else {
1984: $location = '/home/httpd/html/res'.$file;
1985: }
1986: }
1987: $location=~s://+:/:g; # remove duplicate /
1988: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1989: return $location;
1990: }
1991:
1992: sub hreflocation {
1993: my ($dir,$file)=@_;
1994: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1995: my $finalpath=filelocation($dir,$file);
1996: $finalpath=~s/^\/home\/httpd\/html//;
1997: return $finalpath;
1998: } else {
1999: return $file;
2000: }
2001: }
2002:
2003: # ------------------------------------------------------------- Declutters URLs
2004:
2005: sub declutter {
2006: my $thisfn=shift;
2007: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2008: $thisfn=~s/^\///;
2009: $thisfn=~s/^res\///;
2010: return $thisfn;
2011: }
2012:
2013: # -------------------------------------------------------- Escape Special Chars
2014:
2015: sub escape {
2016: my $str=shift;
2017: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2018: return $str;
2019: }
2020:
2021: # ----------------------------------------------------- Un-Escape Special Chars
2022:
2023: sub unescape {
2024: my $str=shift;
2025: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2026: return $str;
2027: }
2028:
2029: # ================================================================ Main Program
2030:
2031: sub BEGIN {
2032: if ($readit ne 'done') {
2033: # ------------------------------------------------------------ Read access.conf
2034: {
2035: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2036:
2037: while (my $configline=<$config>) {
2038: if ($configline =~ /PerlSetVar/) {
2039: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2040: chomp($varvalue);
2041: $perlvar{$varname}=$varvalue;
2042: }
2043: }
2044: }
2045:
2046: # ------------------------------------------------------------- Read hosts file
2047: {
2048: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2049:
2050: while (my $configline=<$config>) {
2051: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2052: $hostname{$id}=$name;
2053: $hostdom{$id}=$domain;
2054: if ($role eq 'library') { $libserv{$id}=$name; }
2055: }
2056: }
2057:
2058: # ------------------------------------------------------ Read spare server file
2059: {
2060: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2061:
2062: while (my $configline=<$config>) {
2063: chomp($configline);
2064: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2065: $spareid{$configline}=1;
2066: }
2067: }
2068: }
2069: # ------------------------------------------------------------ Read permissions
2070: {
2071: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2072:
2073: while (my $configline=<$config>) {
2074: chomp($configline);
2075: my ($role,$perm)=split(/ /,$configline);
2076: if ($perm ne '') { $pr{$role}=$perm; }
2077: }
2078: }
2079:
2080: # -------------------------------------------- Read plain texts for permissions
2081: {
2082: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2083:
2084: while (my $configline=<$config>) {
2085: chomp($configline);
2086: my ($short,$plain)=split(/:/,$configline);
2087: if ($plain ne '') { $prp{$short}=$plain; }
2088: }
2089: }
2090:
2091: # ------------------------------------------------------------- Read file types
2092: {
2093: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2094:
2095: while (my $configline=<$config>) {
2096: chomp($configline);
2097: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2098: if ($descr[0] ne '') {
2099: $fe{$ending}=$emb;
2100: $fd{$ending}=join(' ',@descr);
2101: }
2102: }
2103: }
2104:
2105: %metacache=();
2106:
2107: $readit='done';
2108: &logthis('<font color=yellow>INFO: Read configuration</font>');
2109: }
2110: }
2111: 1;
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