1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # metadata_query(sql-query-string,custom-metadata-regex) :
7: # returns file handle of where sql and
8: # regex results will be stored for query
9: # plaintext(short) : plain text explanation of short term
10: # fileembstyle(ext) : embed style in page for file extension
11: # filedescription(ext) : descriptor text for file extension
12: # allowed(short,url) : returns codes for allowed actions
13: # F: full access
14: # U,I,K: authentication modes (cxx only)
15: # '': forbidden
16: # 1: user needs to choose course
17: # 2: browse allowed
18: # definerole(rolename,sys,dom,cou) : define a custom role rolename
19: # set privileges in format of lonTabs/roles.tab for
20: # system, domain and course level,
21: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
22: # level given by url. Optional start and end dates
23: # (leave empty string or zero for "no date")
24: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
25: # custom role to a user for the level given by url.
26: # Specify name and domain of role author, and role name
27: # revokerole (udom,uname,url,role) : Revoke a role for url
28: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
29: # appenv(hash) : adds hash to session environment
30: # delenv(varname) : deletes all environment entries starting with varname
31: # store(hash) : stores hash permanently for this url
32: # cstore(hash) : critical store
33: # restore : returns hash for this url
34: # eget(namesp,array) : returns hash with keys from array filled in from namesp
35: # get(namesp,array) : returns hash with keys from array filled in from namesp
36: # del(namesp,array) : deletes keys out of array from namesp
37: # put(namesp,hash) : stores hash in namesp
38: # cput(namesp,hash) : critical put
39: # dump(namesp) : dumps the complete namespace into a hash
40: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
41: # hash
42: # coursedescription(id) : returns and caches course description for id
43: # repcopy(filename) : replicate file
44: # dirlist(url) : gets a directory listing
45: # directcondval(index) : reading condition value of single condition from
46: # state string
47: # condval(index) : value of condition index based on state
48: # EXT(name) : value of a variable
49: # symblist(map,hash) : Updates symbolic storage links
50: # symbread([filename]) : returns the data handle (filename optional)
51: # rndseed() : returns a random seed
52: # receipt() : returns a receipt to be given out to users
53: # getfile(filename) : returns the contents of filename, or a -1 if it can't
54: # be found, replicates and subscribes to the file
55: # filelocation(dir,file) : returns a farily clean absolute reference to file
56: # from the directory dir
57: # hreflocation(dir,file) : same as filelocation, but for hrefs
58: # log(domain,user,home,msg) : write to permanent log for user
59: # usection(domain,user,courseid) : output of section name/number or '' for
60: # "not in course" and '-1' for "no section"
61: # userenvironment(domain,user,what) : puts out any environment parameter
62: # for a user
63: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
64: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
65: # an array of IDs
66: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
67: # an array of names
68: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
69: # returns a comma separated list of keys
70: #
71: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
72: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
73: # 11/8,11/16,11/18,11/22,11/23,12/22,
74: # 01/06,01/13,02/24,02/28,02/29,
75: # 03/01,03/02,03/06,03/07,03/13,
76: # 04/05,05/29,05/31,06/01,
77: # 06/05,06/26 Gerd Kortemeyer
78: # 06/26 Ben Tyszka
79: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
80: # 08/14 Ben Tyszka
81: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
82: # 10/04 Gerd Kortemeyer
83: # 10/04 Guy Albertelli
84: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
85: # 10/30,10/31,
86: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
87: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
88: # 05/01/01 Guy Albertelli
89: # 05/01,06/01,09/01 Gerd Kortemeyer
90: # 09/01 Guy Albertelli
91: # 09/01,10/01,11/01 Gerd Kortemeyer
92: # 02/27/01 Scott Harrison
93: # 3/2 Gerd Kortemeyer
94: # 3/15,3/19 Scott Harrison
95: # 3/19,3/20 Gerd Kortemeyer
96: # 3/22,3/27 Scott Harrison
97:
98: package Apache::lonnet;
99:
100: use strict;
101: use Apache::File;
102: use LWP::UserAgent();
103: use HTTP::Headers;
104: use vars
105: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
106: use IO::Socket;
107: use GDBM_File;
108: use Apache::Constants qw(:common :http);
109: use HTML::TokeParser;
110: use Fcntl qw(:flock);
111:
112: # --------------------------------------------------------------------- Logging
113:
114: sub logthis {
115: my $message=shift;
116: my $execdir=$perlvar{'lonDaemons'};
117: my $now=time;
118: my $local=localtime($now);
119: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
120: print $fh "$local ($$): $message\n";
121: return 1;
122: }
123:
124: sub logperm {
125: my $message=shift;
126: my $execdir=$perlvar{'lonDaemons'};
127: my $now=time;
128: my $local=localtime($now);
129: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
130: print $fh "$now:$message:$local\n";
131: return 1;
132: }
133:
134: # -------------------------------------------------- Non-critical communication
135: sub subreply {
136: my ($cmd,$server)=@_;
137: my $peerfile="$perlvar{'lonSockDir'}/$server";
138: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
139: Type => SOCK_STREAM,
140: Timeout => 10)
141: or return "con_lost";
142: print $client "$cmd\n";
143: my $answer=<$client>;
144: if (!$answer) { $answer="con_lost"; }
145: chomp($answer);
146: return $answer;
147: }
148:
149: sub reply {
150: my ($cmd,$server)=@_;
151: my $answer=subreply($cmd,$server);
152: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
153: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
154: &logthis("<font color=blue>WARNING:".
155: " $cmd to $server returned $answer</font>");
156: }
157: return $answer;
158: }
159:
160: # ----------------------------------------------------------- Send USR1 to lonc
161:
162: sub reconlonc {
163: my $peerfile=shift;
164: &logthis("Trying to reconnect for $peerfile");
165: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
166: if (my $fh=Apache::File->new("$loncfile")) {
167: my $loncpid=<$fh>;
168: chomp($loncpid);
169: if (kill 0 => $loncpid) {
170: &logthis("lonc at pid $loncpid responding, sending USR1");
171: kill USR1 => $loncpid;
172: sleep 1;
173: if (-e "$peerfile") { return; }
174: &logthis("$peerfile still not there, give it another try");
175: sleep 5;
176: if (-e "$peerfile") { return; }
177: &logthis(
178: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
179: } else {
180: &logthis(
181: "<font color=blue>WARNING:".
182: " lonc at pid $loncpid not responding, giving up</font>");
183: }
184: } else {
185: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
186: }
187: }
188:
189: # ------------------------------------------------------ Critical communication
190:
191: sub critical {
192: my ($cmd,$server)=@_;
193: unless ($hostname{$server}) {
194: &logthis("<font color=blue>WARNING:".
195: " Critical message to unknown server ($server)</font>");
196: return 'no_such_host';
197: }
198: my $answer=reply($cmd,$server);
199: if ($answer eq 'con_lost') {
200: my $pingreply=reply('ping',$server);
201: &reconlonc("$perlvar{'lonSockDir'}/$server");
202: my $pongreply=reply('pong',$server);
203: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
204: $answer=reply($cmd,$server);
205: if ($answer eq 'con_lost') {
206: my $now=time;
207: my $middlename=$cmd;
208: $middlename=substr($middlename,0,16);
209: $middlename=~s/\W//g;
210: my $dfilename=
211: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
212: {
213: my $dfh;
214: if ($dfh=Apache::File->new(">$dfilename")) {
215: print $dfh "$cmd\n";
216: }
217: }
218: sleep 2;
219: my $wcmd='';
220: {
221: my $dfh;
222: if ($dfh=Apache::File->new("$dfilename")) {
223: $wcmd=<$dfh>;
224: }
225: }
226: chomp($wcmd);
227: if ($wcmd eq $cmd) {
228: &logthis("<font color=blue>WARNING: ".
229: "Connection buffer $dfilename: $cmd</font>");
230: &logperm("D:$server:$cmd");
231: return 'con_delayed';
232: } else {
233: &logthis("<font color=red>CRITICAL:"
234: ." Critical connection failed: $server $cmd</font>");
235: &logperm("F:$server:$cmd");
236: return 'con_failed';
237: }
238: }
239: }
240: return $answer;
241: }
242:
243: # ---------------------------------------------------------- Append Environment
244:
245: sub appenv {
246: my %newenv=@_;
247: map {
248: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
249: &logthis("<font color=blue>WARNING: ".
250: "Attempt to modify environment ".$_." to ".$newenv{$_});
251: delete($newenv{$_});
252: } else {
253: $ENV{$_}=$newenv{$_};
254: }
255: } keys %newenv;
256:
257: my $lockfh;
258: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
259: return 'error: '.$!;
260: }
261: unless (flock($lockfh,LOCK_EX)) {
262: &logthis("<font color=blue>WARNING: ".
263: 'Could not obtain exclusive lock in appenv: '.$!);
264: $lockfh->close();
265: return 'error: '.$!;
266: }
267:
268: my @oldenv;
269: {
270: my $fh;
271: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
272: return 'error: '.$!;
273: }
274: @oldenv=<$fh>;
275: $fh->close();
276: }
277: for (my $i=0; $i<=$#oldenv; $i++) {
278: chomp($oldenv[$i]);
279: if ($oldenv[$i] ne '') {
280: my ($name,$value)=split(/=/,$oldenv[$i]);
281: unless (defined($newenv{$name})) {
282: $newenv{$name}=$value;
283: }
284: }
285: }
286: {
287: my $fh;
288: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
289: return 'error';
290: }
291: my $newname;
292: foreach $newname (keys %newenv) {
293: print $fh "$newname=$newenv{$newname}\n";
294: }
295: $fh->close();
296: }
297:
298: $lockfh->close();
299: return 'ok';
300: }
301: # ----------------------------------------------------- Delete from Environment
302:
303: sub delenv {
304: my $delthis=shift;
305: my %newenv=();
306: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
307: &logthis("<font color=blue>WARNING: ".
308: "Attempt to delete from environment ".$delthis);
309: return 'error';
310: }
311: my @oldenv;
312: {
313: my $fh;
314: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
315: return 'error';
316: }
317: unless (flock($fh,LOCK_SH)) {
318: &logthis("<font color=blue>WARNING: ".
319: 'Could not obtain shared lock in delenv: '.$!);
320: $fh->close();
321: return 'error: '.$!;
322: }
323: @oldenv=<$fh>;
324: $fh->close();
325: }
326: {
327: my $fh;
328: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
329: return 'error';
330: }
331: unless (flock($fh,LOCK_EX)) {
332: &logthis("<font color=blue>WARNING: ".
333: 'Could not obtain exclusive lock in delenv: '.$!);
334: $fh->close();
335: return 'error: '.$!;
336: }
337: map {
338: unless ($_=~/^$delthis/) { print $fh $_; }
339: } @oldenv;
340: $fh->close();
341: }
342: return 'ok';
343: }
344:
345: # ------------------------------ Find server with least workload from spare.tab
346:
347: sub spareserver {
348: my $tryserver;
349: my $spareserver='';
350: my $lowestserver=100;
351: foreach $tryserver (keys %spareid) {
352: my $answer=reply('load',$tryserver);
353: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
354: $spareserver="http://$hostname{$tryserver}";
355: $lowestserver=$answer;
356: }
357: }
358: return $spareserver;
359: }
360:
361: # --------- Try to authenticate user from domain's lib servers (first this one)
362:
363: sub authenticate {
364: my ($uname,$upass,$udom)=@_;
365: $upass=escape($upass);
366: if (($perlvar{'lonRole'} eq 'library') &&
367: ($udom eq $perlvar{'lonDefDomain'})) {
368: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
369: if ($answer =~ /authorized/) {
370: if ($answer eq 'authorized') {
371: &logthis("User $uname at $udom authorized by local server");
372: return $perlvar{'lonHostID'};
373: }
374: if ($answer eq 'non_authorized') {
375: &logthis("User $uname at $udom rejected by local server");
376: return 'no_host';
377: }
378: }
379: }
380:
381: my $tryserver;
382: foreach $tryserver (keys %libserv) {
383: if ($hostdom{$tryserver} eq $udom) {
384: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
385: if ($answer =~ /authorized/) {
386: if ($answer eq 'authorized') {
387: &logthis("User $uname at $udom authorized by $tryserver");
388: return $tryserver;
389: }
390: if ($answer eq 'non_authorized') {
391: &logthis("User $uname at $udom rejected by $tryserver");
392: return 'no_host';
393: }
394: }
395: }
396: }
397: &logthis("User $uname at $udom could not be authenticated");
398: return 'no_host';
399: }
400:
401: # ---------------------- Find the homebase for a user from domain's lib servers
402:
403: sub homeserver {
404: my ($uname,$udom)=@_;
405:
406: my $index="$uname:$udom";
407: if ($homecache{$index}) { return "$homecache{$index}"; }
408:
409: my $tryserver;
410: foreach $tryserver (keys %libserv) {
411: if ($hostdom{$tryserver} eq $udom) {
412: my $answer=reply("home:$udom:$uname",$tryserver);
413: if ($answer eq 'found') {
414: $homecache{$index}=$tryserver;
415: return $tryserver;
416: }
417: }
418: }
419: return 'no_host';
420: }
421:
422: # ------------------------------------- Find the usernames behind a list of IDs
423:
424: sub idget {
425: my ($udom,@ids)=@_;
426: my %returnhash=();
427:
428: my $tryserver;
429: foreach $tryserver (keys %libserv) {
430: if ($hostdom{$tryserver} eq $udom) {
431: my $idlist=join('&',@ids);
432: $idlist=~tr/A-Z/a-z/;
433: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
434: my @answer=();
435: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
436: @answer=split(/\&/,$reply);
437: } ;
438: my $i;
439: for ($i=0;$i<=$#ids;$i++) {
440: if ($answer[$i]) {
441: $returnhash{$ids[$i]}=$answer[$i];
442: }
443: }
444: }
445: }
446: return %returnhash;
447: }
448:
449: # ------------------------------------- Find the IDs behind a list of usernames
450:
451: sub idrget {
452: my ($udom,@unames)=@_;
453: my %returnhash=();
454: map {
455: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
456: } @unames;
457: return %returnhash;
458: }
459:
460: # ------------------------------- Store away a list of names and associated IDs
461:
462: sub idput {
463: my ($udom,%ids)=@_;
464: my %servers=();
465: map {
466: my $uhom=&homeserver($_,$udom);
467: if ($uhom ne 'no_host') {
468: my $id=&escape($ids{$_});
469: $id=~tr/A-Z/a-z/;
470: my $unam=&escape($_);
471: if ($servers{$uhom}) {
472: $servers{$uhom}.='&'.$id.'='.$unam;
473: } else {
474: $servers{$uhom}=$id.'='.$unam;
475: }
476: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
477: }
478: } keys %ids;
479: map {
480: &critical('idput:'.$udom.':'.$servers{$_},$_);
481: } keys %servers;
482: }
483:
484: # ------------------------------------- Find the section of student in a course
485:
486: sub usection {
487: my ($udom,$unam,$courseid)=@_;
488: $courseid=~s/\_/\//g;
489: $courseid=~s/^(\w)/\/$1/;
490: map {
491: my ($key,$value)=split(/\=/,$_);
492: $key=&unescape($key);
493: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
494: my $section=$1;
495: if ($key eq $courseid.'_st') { $section=''; }
496: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
497: my $now=time;
498: my $notactive=0;
499: if ($start) {
500: if ($now<$start) { $notactive=1; }
501: }
502: if ($end) {
503: if ($now>$end) { $notactive=1; }
504: }
505: unless ($notactive) { return $section; }
506: }
507: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
508: &homeserver($unam,$udom)));
509: return '-1';
510: }
511:
512: # ------------------------------------- Read an entry from a user's environment
513:
514: sub userenvironment {
515: my ($udom,$unam,@what)=@_;
516: my %returnhash=();
517: my @answer=split(/\&/,
518: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
519: &homeserver($unam,$udom)));
520: my $i;
521: for ($i=0;$i<=$#what;$i++) {
522: $returnhash{$what[$i]}=&unescape($answer[$i]);
523: }
524: return %returnhash;
525: }
526:
527: # ----------------------------- Subscribe to a resource, return URL if possible
528:
529: sub subscribe {
530: my $fname=shift;
531: my $author=$fname;
532: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
533: my ($udom,$uname)=split(/\//,$author);
534: my $home=homeserver($uname,$udom);
535: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
536: return 'not_found';
537: }
538: my $answer=reply("sub:$fname",$home);
539: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
540: $answer.=' by '.$home;
541: }
542: return $answer;
543: }
544:
545: # -------------------------------------------------------------- Replicate file
546:
547: sub repcopy {
548: my $filename=shift;
549: $filename=~s/\/+/\//g;
550: my $transname="$filename.in.transfer";
551: if ((-e $filename) || (-e $transname)) { return OK; }
552: my $remoteurl=subscribe($filename);
553: if ($remoteurl =~ /^con_lost by/) {
554: &logthis("Subscribe returned $remoteurl: $filename");
555: return HTTP_SERVICE_UNAVAILABLE;
556: } elsif ($remoteurl eq 'not_found') {
557: &logthis("Subscribe returned not_found: $filename");
558: return HTTP_NOT_FOUND;
559: } elsif ($remoteurl =~ /^rejected by/) {
560: &logthis("Subscribe returned $remoteurl: $filename");
561: return FORBIDDEN;
562: } elsif ($remoteurl eq 'directory') {
563: return OK;
564: } else {
565: my @parts=split(/\//,$filename);
566: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
567: if ($path ne "$perlvar{'lonDocRoot'}/res") {
568: &logthis("Malconfiguration for replication: $filename");
569: return HTTP_BAD_REQUEST;
570: }
571: my $count;
572: for ($count=5;$count<$#parts;$count++) {
573: $path.="/$parts[$count]";
574: if ((-e $path)!=1) {
575: mkdir($path,0777);
576: }
577: }
578: my $ua=new LWP::UserAgent;
579: my $request=new HTTP::Request('GET',"$remoteurl");
580: my $response=$ua->request($request,$transname);
581: if ($response->is_error()) {
582: unlink($transname);
583: my $message=$response->status_line;
584: &logthis("<font color=blue>WARNING:"
585: ." LWP get: $message: $filename</font>");
586: return HTTP_SERVICE_UNAVAILABLE;
587: } else {
588: if ($remoteurl!~/\.meta$/) {
589: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
590: my $mresponse=$ua->request($mrequest,$filename.'.meta');
591: if ($mresponse->is_error()) {
592: unlink($filename.'.meta');
593: &logthis(
594: "<font color=yellow>INFO: No metadata: $filename</font>");
595: }
596: }
597: rename($transname,$filename);
598: return OK;
599: }
600: }
601: }
602:
603: # --------------------------------------------------------- Server Side Include
604:
605: sub ssi {
606:
607: my ($fn,%form)=@_;
608:
609: my $ua=new LWP::UserAgent;
610:
611: my $request;
612:
613: if (%form) {
614: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
615: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
616: } else {
617: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
618: }
619:
620: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
621: my $response=$ua->request($request);
622:
623: return $response->content;
624: }
625:
626: # ------------------------------------------------------------------------- Log
627:
628: sub log {
629: my ($dom,$nam,$hom,$what)=@_;
630: return critical("log:$dom:$nam:$what",$hom);
631: }
632:
633: # --------------------------------------------- Set Expire Date for Spreadsheet
634:
635: sub expirespread {
636: my ($uname,$udom,$stype,$usymb)=@_;
637: my $cid=$ENV{'request.course.id'};
638: if ($cid) {
639: my $now=time;
640: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
641: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
642: $ENV{'course.'.$cid.'.num'}.
643: ':nohist_expirationdates:'.
644: &escape($key).'='.$now,
645: $ENV{'course.'.$cid.'.home'})
646: }
647: return 'ok';
648: }
649:
650: # ----------------------------------------------------- Devalidate Spreadsheets
651:
652: sub devalidate {
653: my $symb=shift;
654: my $cid=$ENV{'request.course.id'};
655: if ($cid) {
656: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
657: my $status=
658: &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
659: $ENV{'course.'.$cid.'.num'}.
660: ':nohist_calculatedsheets:'.
661: &escape($key.'studentcalc:'),
662: $ENV{'course.'.$cid.'.home'})
663: .' '.
664: &reply('del:'.$ENV{'user.domain'}.':'.
665: $ENV{'user.name'}.
666: ':nohist_calculatedsheets_'.$cid.':'.
667: &escape($key.'assesscalc:'.$symb),
668: $ENV{'user.home'});
669: unless ($status eq 'ok ok') {
670: &logthis('Could not devalidate spreadsheet '.
671: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
672: $symb.': '.$status);
673: }
674: }
675: }
676:
677: # ----------------------------------------------------------------------- Store
678:
679: sub store {
680: my %storehash=@_;
681: my $symb;
682: unless ($symb=&symbread()) { return ''; }
683:
684: &devalidate($symb);
685:
686: $symb=escape($symb);
687: my $namespace;
688: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
689: my $namevalue='';
690: map {
691: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
692: } keys %storehash;
693: $namevalue=~s/\&$//;
694: return reply(
695: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
696: "$ENV{'user.home'}");
697: }
698:
699: # -------------------------------------------------------------- Critical Store
700:
701: sub cstore {
702: my %storehash=@_;
703: my $symb;
704: unless ($symb=&symbread()) { return ''; }
705:
706: &devalidate($symb);
707:
708: $symb=escape($symb);
709: my $namespace;
710: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
711: my $namevalue='';
712: map {
713: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
714: } keys %storehash;
715: $namevalue=~s/\&$//;
716: return critical(
717: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
718: "$ENV{'user.home'}");
719: }
720:
721: # --------------------------------------------------------------------- Restore
722:
723: sub restore {
724: my $symb;
725: unless ($symb=escape(&symbread())) { return ''; }
726: my $namespace;
727: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
728: my $answer=reply(
729: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
730: "$ENV{'user.home'}");
731: my %returnhash=();
732: map {
733: my ($name,$value)=split(/\=/,$_);
734: $returnhash{&unescape($name)}=&unescape($value);
735: } split(/\&/,$answer);
736: my $version;
737: for ($version=1;$version<=$returnhash{'version'};$version++) {
738: map {
739: $returnhash{$_}=$returnhash{$version.':'.$_};
740: } split(/\:/,$returnhash{$version.':keys'});
741: }
742: return %returnhash;
743: }
744:
745: # ---------------------------------------------------------- Course Description
746:
747: sub coursedescription {
748: my $courseid=shift;
749: $courseid=~s/^\///;
750: $courseid=~s/\_/\//g;
751: my ($cdomain,$cnum)=split(/\//,$courseid);
752: my $chome=homeserver($cnum,$cdomain);
753: if ($chome ne 'no_host') {
754: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
755: if ($rep ne 'con_lost') {
756: my $normalid=$cdomain.'_'.$cnum;
757: my %envhash=();
758: my %returnhash=('home' => $chome,
759: 'domain' => $cdomain,
760: 'num' => $cnum);
761: map {
762: my ($name,$value)=split(/\=/,$_);
763: $name=&unescape($name);
764: $value=&unescape($value);
765: $returnhash{$name}=$value;
766: $envhash{'course.'.$normalid.'.'.$name}=$value;
767: } split(/\&/,$rep);
768: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
769: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
770: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
771: $envhash{'course.'.$normalid.'.last_cache'}=time;
772: $envhash{'course.'.$normalid.'.home'}=$chome;
773: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
774: $envhash{'course.'.$normalid.'.num'}=$cnum;
775: &appenv(%envhash);
776: return %returnhash;
777: }
778: }
779: return ();
780: }
781:
782: # -------------------------------------------------------- Get user privileges
783:
784: sub rolesinit {
785: my ($domain,$username,$authhost)=@_;
786: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
787: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
788: my %allroles=();
789: my %thesepriv=();
790: my $now=time;
791: my $userroles="user.login.time=$now\n";
792: my $thesestr;
793:
794: if ($rolesdump ne '') {
795: map {
796: if ($_!~/^rolesdef\&/) {
797: my ($area,$role)=split(/=/,$_);
798: $area=~s/\_\w\w$//;
799: my ($trole,$tend,$tstart)=split(/_/,$role);
800: $userroles.='user.role.'.$trole.'.'.$area.'='.
801: $tstart.'.'.$tend."\n";
802: if ($tend!=0) {
803: if ($tend<$now) {
804: $trole='';
805: }
806: }
807: if ($tstart!=0) {
808: if ($tstart>$now) {
809: $trole='';
810: }
811: }
812: if (($area ne '') && ($trole ne '')) {
813: my $spec=$trole.'.'.$area;
814: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
815: if ($trole =~ /^cr\//) {
816: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
817: my $homsvr=homeserver($rauthor,$rdomain);
818: if ($hostname{$homsvr} ne '') {
819: my $roledef=
820: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
821: $homsvr);
822: if (($roledef ne 'con_lost') && ($roledef ne '')) {
823: my ($syspriv,$dompriv,$coursepriv)=
824: split(/\_/,unescape($roledef));
825: $allroles{'cm./'}.=':'.$syspriv;
826: $allroles{$spec.'./'}.=':'.$syspriv;
827: if ($tdomain ne '') {
828: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
829: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
830: if ($trest ne '') {
831: $allroles{'cm.'.$area}.=':'.$coursepriv;
832: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
833: }
834: }
835: }
836: }
837: } else {
838: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
839: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
840: if ($tdomain ne '') {
841: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
842: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
843: if ($trest ne '') {
844: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
845: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
846: }
847: }
848: }
849: }
850: }
851: } split(/&/,$rolesdump);
852: map {
853: %thesepriv=();
854: map {
855: if ($_ ne '') {
856: my ($privilege,$restrictions)=split(/&/,$_);
857: if ($restrictions eq '') {
858: $thesepriv{$privilege}='F';
859: } else {
860: if ($thesepriv{$privilege} ne 'F') {
861: $thesepriv{$privilege}.=$restrictions;
862: }
863: }
864: }
865: } split(/:/,$allroles{$_});
866: $thesestr='';
867: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
868: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
869: } keys %allroles;
870: }
871: return $userroles;
872: }
873:
874: # --------------------------------------------------------------- get interface
875:
876: sub get {
877: my ($namespace,@storearr)=@_;
878: my $items='';
879: map {
880: $items.=escape($_).'&';
881: } @storearr;
882: $items=~s/\&$//;
883: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
884: $ENV{'user.home'});
885: my @pairs=split(/\&/,$rep);
886: my %returnhash=();
887: my $i=0;
888: map {
889: $returnhash{$_}=unescape($pairs[$i]);
890: $i++;
891: } @storearr;
892: return %returnhash;
893: }
894:
895: # --------------------------------------------------------------- del interface
896:
897: sub del {
898: my ($namespace,@storearr)=@_;
899: my $items='';
900: map {
901: $items.=escape($_).'&';
902: } @storearr;
903: $items=~s/\&$//;
904: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
905: $ENV{'user.home'});
906: }
907:
908: # -------------------------------------------------------------- dump interface
909:
910: sub dump {
911: my $namespace=shift;
912: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
913: $ENV{'user.home'});
914: my @pairs=split(/\&/,$rep);
915: my %returnhash=();
916: map {
917: my ($key,$value)=split(/=/,$_);
918: $returnhash{unescape($key)}=unescape($value);
919: } @pairs;
920: return %returnhash;
921: }
922:
923: # --------------------------------------------------------------- put interface
924:
925: sub put {
926: my ($namespace,%storehash)=@_;
927: my $items='';
928: map {
929: $items.=escape($_).'='.escape($storehash{$_}).'&';
930: } keys %storehash;
931: $items=~s/\&$//;
932: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
933: $ENV{'user.home'});
934: }
935:
936: # ------------------------------------------------------ critical put interface
937:
938: sub cput {
939: my ($namespace,%storehash)=@_;
940: my $items='';
941: map {
942: $items.=escape($_).'='.escape($storehash{$_}).'&';
943: } keys %storehash;
944: $items=~s/\&$//;
945: return critical
946: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
947: $ENV{'user.home'});
948: }
949:
950: # -------------------------------------------------------------- eget interface
951:
952: sub eget {
953: my ($namespace,@storearr)=@_;
954: my $items='';
955: map {
956: $items.=escape($_).'&';
957: } @storearr;
958: $items=~s/\&$//;
959: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
960: $ENV{'user.home'});
961: my @pairs=split(/\&/,$rep);
962: my %returnhash=();
963: my $i=0;
964: map {
965: $returnhash{$_}=unescape($pairs[$i]);
966: $i++;
967: } @storearr;
968: return %returnhash;
969: }
970:
971: # ------------------------------------------------- Check for a user privilege
972:
973: sub allowed {
974: my ($priv,$uri)=@_;
975: $uri=&declutter($uri);
976:
977: # Free bre access to adm and meta resources
978:
979: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
980: return 'F';
981: }
982:
983: my $thisallowed='';
984: my $statecond=0;
985: my $courseprivid='';
986:
987: # Course
988:
989: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
990: $thisallowed.=$1;
991: }
992:
993: # Domain
994:
995: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
996: =~/$priv\&([^\:]*)/) {
997: $thisallowed.=$1;
998: }
999:
1000: # Course: uri itself is a course
1001: my $courseuri=$uri;
1002: $courseuri=~s/\_(\d)/\/$1/;
1003: $courseuri=~s/^([^\/])/\/$1/;
1004:
1005: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1006: =~/$priv\&([^\:]*)/) {
1007: $thisallowed.=$1;
1008: }
1009:
1010: # Full access at system, domain or course-wide level? Exit.
1011:
1012: if ($thisallowed=~/F/) {
1013: return 'F';
1014: }
1015:
1016: # If this is generating or modifying users, exit with special codes
1017:
1018: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1019: return $thisallowed;
1020: }
1021: #
1022: # Gathered so far: system, domain and course wide privileges
1023: #
1024: # Course: See if uri or referer is an individual resource that is part of
1025: # the course
1026:
1027: if ($ENV{'request.course.id'}) {
1028: $courseprivid=$ENV{'request.course.id'};
1029: if ($ENV{'request.course.sec'}) {
1030: $courseprivid.='/'.$ENV{'request.course.sec'};
1031: }
1032: $courseprivid=~s/\_/\//;
1033: my $checkreferer=1;
1034: my @uriparts=split(/\//,$uri);
1035: my $filename=$uriparts[$#uriparts];
1036: my $pathname=$uri;
1037: $pathname=~s/\/$filename$//;
1038: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1039: /\&$filename\:([\d\|]+)\&/) {
1040: $statecond=$1;
1041: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1042: =~/$priv\&([^\:]*)/) {
1043: $thisallowed.=$1;
1044: $checkreferer=0;
1045: }
1046: }
1047:
1048: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1049: my $refuri=$ENV{'HTTP_REFERER'};
1050: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1051: $refuri=&declutter($refuri);
1052: my @uriparts=split(/\//,$refuri);
1053: my $filename=$uriparts[$#uriparts];
1054: my $pathname=$refuri;
1055: $pathname=~s/\/$filename$//;
1056: my @filenameparts=split(/\./,$uri);
1057: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1058: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1059: /\&$filename\:([\d\|]+)\&/) {
1060: my $refstatecond=$1;
1061: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1062: =~/$priv\&([^\:]*)/) {
1063: $thisallowed.=$1;
1064: $uri=$refuri;
1065: $statecond=$refstatecond;
1066: }
1067: }
1068: }
1069: }
1070: }
1071:
1072: #
1073: # Gathered now: all privileges that could apply, and condition number
1074: #
1075: #
1076: # Full or no access?
1077: #
1078:
1079: if ($thisallowed=~/F/) {
1080: return 'F';
1081: }
1082:
1083: unless ($thisallowed) {
1084: return '';
1085: }
1086:
1087: # Restrictions exist, deal with them
1088: #
1089: # C:according to course preferences
1090: # R:according to resource settings
1091: # L:unless locked
1092: # X:according to user session state
1093: #
1094:
1095: # Possibly locked functionality, check all courses
1096: # Locks might take effect only after 10 minutes cache expiration for other
1097: # courses, and 2 minutes for current course
1098:
1099: my $envkey;
1100: if ($thisallowed=~/L/) {
1101: foreach $envkey (keys %ENV) {
1102: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1103: my $courseid=$2;
1104: my $roleid=$1.'.'.$2;
1105: $courseid=~s/^\///;
1106: my $expiretime=600;
1107: if ($ENV{'request.role'} eq $roleid) {
1108: $expiretime=120;
1109: }
1110: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1111: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1112: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1113: &coursedescription($courseid);
1114: }
1115: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1116: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1117: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1118: &log($ENV{'user.domain'},$ENV{'user.name'},
1119: $ENV{'user.host'},
1120: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1121: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1122: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1123: return '';
1124: }
1125: }
1126: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1127: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1128: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1129: &log($ENV{'user.domain'},$ENV{'user.name'},
1130: $ENV{'user.host'},
1131: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1132: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1133: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1134: return '';
1135: }
1136: }
1137: }
1138: }
1139: }
1140:
1141: #
1142: # Rest of the restrictions depend on selected course
1143: #
1144:
1145: unless ($ENV{'request.course.id'}) {
1146: return '1';
1147: }
1148:
1149: #
1150: # Now user is definitely in a course
1151: #
1152:
1153:
1154: # Course preferences
1155:
1156: if ($thisallowed=~/C/) {
1157: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1158: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1159: =~/\,$rolecode\,/) {
1160: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1161: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1162: $ENV{'request.course.id'});
1163: return '';
1164: }
1165: }
1166:
1167: # Resource preferences
1168:
1169: if ($thisallowed=~/R/) {
1170: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1171: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1172: if (-e $filename) {
1173: my @content;
1174: {
1175: my $fh=Apache::File->new($filename);
1176: @content=<$fh>;
1177: }
1178: if (join('',@content)=~
1179: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1180: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1181: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1182: return '';
1183:
1184: }
1185: }
1186: }
1187:
1188: # Restricted by state?
1189:
1190: if ($thisallowed=~/X/) {
1191: if (&condval($statecond)) {
1192: return '2';
1193: } else {
1194: return '';
1195: }
1196: }
1197:
1198: return 'F';
1199: }
1200:
1201: # ----------------------------------------------------------------- Define Role
1202:
1203: sub definerole {
1204: if (allowed('mcr','/')) {
1205: my ($rolename,$sysrole,$domrole,$courole)=@_;
1206: map {
1207: my ($crole,$cqual)=split(/\&/,$_);
1208: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1209: if ($pr{'cr:s'}=~/$crole\&/) {
1210: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1211: return "refused:s:$crole&$cqual";
1212: }
1213: }
1214: } split('/',$sysrole);
1215: map {
1216: my ($crole,$cqual)=split(/\&/,$_);
1217: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1218: if ($pr{'cr:d'}=~/$crole\&/) {
1219: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1220: return "refused:d:$crole&$cqual";
1221: }
1222: }
1223: } split('/',$domrole);
1224: map {
1225: my ($crole,$cqual)=split(/\&/,$_);
1226: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1227: if ($pr{'cr:c'}=~/$crole\&/) {
1228: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1229: return "refused:c:$crole&$cqual";
1230: }
1231: }
1232: } split('/',$courole);
1233: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1234: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1235: "rolesdef_$rolename=".
1236: escape($sysrole.'_'.$domrole.'_'.$courole);
1237: return reply($command,$ENV{'user.home'});
1238: } else {
1239: return 'refused';
1240: }
1241: }
1242:
1243: # ---------------- Make a metadata query against the network of library servers
1244:
1245: sub metadata_query {
1246: my ($query,$custom,$customshow)=@_;
1247: # need to put in a library server loop here and return a hash
1248: # for my $server (keys %libserv) {
1249: my %rhash;
1250: for my $server ('msul3') {
1251: unless ($custom or $customshow) {
1252: my $reply=&reply("querysend:".&escape($query),$server);
1253: $rhash{$server}=$reply;
1254: return $reply;
1255: }
1256: else {
1257: my $reply=&reply("querysend:".&escape($query).':'.
1258: &escape($custom).':'.&escape($customshow),
1259: $server);
1260: $rhash{$server}=$reply;
1261: return $reply;
1262: }
1263: }
1264: return \%rhash;
1265: }
1266:
1267: # ------------------------------------------------------------------ Plain Text
1268:
1269: sub plaintext {
1270: my $short=shift;
1271: return $prp{$short};
1272: }
1273:
1274: # ------------------------------------------------------------------ Plain Text
1275:
1276: sub fileembstyle {
1277: my $ending=shift;
1278: return $fe{$ending};
1279: }
1280:
1281: # ------------------------------------------------------------ Description Text
1282:
1283: sub filedescription {
1284: my $ending=shift;
1285: return $fd{$ending};
1286: }
1287:
1288: # ----------------------------------------------------------------- Assign Role
1289:
1290: sub assignrole {
1291: my ($udom,$uname,$url,$role,$end,$start)=@_;
1292: my $mrole;
1293: if ($role =~ /^cr\//) {
1294: unless (&allowed('ccr',$url)) {
1295: &logthis('Refused custom assignrole: '.
1296: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1297: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1298: return 'refused';
1299: }
1300: $mrole='cr';
1301: } else {
1302: my $cwosec=$url;
1303: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1304: unless (&allowed('c'.$role,$cwosec)) {
1305: &logthis('Refused assignrole: '.
1306: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1307: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1308: return 'refused';
1309: }
1310: $mrole=$role;
1311: }
1312: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1313: "$udom:$uname:$url".'_'."$mrole=$role";
1314: if ($end) { $command.='_'.$end; }
1315: if ($start) {
1316: if ($end) {
1317: $command.='_'.$start;
1318: } else {
1319: $command.='_0_'.$start;
1320: }
1321: }
1322: return &reply($command,&homeserver($uname,$udom));
1323: }
1324:
1325: # --------------------------------------------------------------- Modify a user
1326:
1327:
1328: sub modifyuser {
1329: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1330: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1331: $umode.', '.$first.', '.$middle.', '.
1332: $last.', '.$gene.' by '.
1333: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1334: my $uhome=&homeserver($uname,$udom);
1335: # ----------------------------------------------------------------- Create User
1336: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1337: my $unhome='';
1338: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1339: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1340: } else {
1341: my $tryserver;
1342: my $loadm=10000000;
1343: foreach $tryserver (keys %libserv) {
1344: if ($hostdom{$tryserver} eq $udom) {
1345: my $answer=reply('load',$tryserver);
1346: if (($answer=~/\d+/) && ($answer<$loadm)) {
1347: $loadm=$answer;
1348: $unhome=$tryserver;
1349: }
1350: }
1351: }
1352: }
1353: if (($unhome eq '') || ($unhome eq 'no_host')) {
1354: return 'error: find home';
1355: }
1356: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1357: &escape($upass),$unhome);
1358: unless ($reply eq 'ok') {
1359: return 'error: '.$reply;
1360: }
1361: $uhome=&homeserver($uname,$udom);
1362: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1363: return 'error: verify home';
1364: }
1365: }
1366: # ---------------------------------------------------------------------- Add ID
1367: if ($uid) {
1368: $uid=~tr/A-Z/a-z/;
1369: my %uidhash=&idrget($udom,$uname);
1370: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1371: unless ($uid eq $uidhash{$uname}) {
1372: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1373: }
1374: } else {
1375: &idput($udom,($uname => $uid));
1376: }
1377: }
1378: # -------------------------------------------------------------- Add names, etc
1379: my $names=&reply('get:'.$udom.':'.$uname.
1380: ':environment:firstname&middlename&lastname&generation',
1381: $uhome);
1382: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1383: if ($first) { $efirst = &escape($first); }
1384: if ($middle) { $emiddle = &escape($middle); }
1385: if ($last) { $elast = &escape($last); }
1386: if ($gene) { $egene = &escape($gene); }
1387: my $reply=&reply('put:'.$udom.':'.$uname.
1388: ':environment:firstname='.$efirst.
1389: '&middlename='.$emiddle.
1390: '&lastname='.$elast.
1391: '&generation='.$egene,$uhome);
1392: if ($reply ne 'ok') {
1393: return 'error: '.$reply;
1394: }
1395: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1396: $umode.', '.$first.', '.$middle.', '.
1397: $last.', '.$gene.' by '.
1398: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1399: return 'ok';
1400: }
1401:
1402: # -------------------------------------------------------------- Modify student
1403:
1404: sub modifystudent {
1405: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1406: $end,$start)=@_;
1407: my $cid='';
1408: unless ($cid=$ENV{'request.course.id'}) {
1409: return 'not_in_class';
1410: }
1411: # --------------------------------------------------------------- Make the user
1412: my $reply=&modifyuser
1413: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1414: unless ($reply eq 'ok') { return $reply; }
1415: my $uhome=&homeserver($uname,$udom);
1416: if (($uhome eq '') || ($uhome eq 'no_host')) {
1417: return 'error: no such user';
1418: }
1419: # -------------------------------------------------- Add student to course list
1420: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1421: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1422: &escape($uname.':'.$udom).'='.
1423: &escape($end.':'.$start),
1424: $ENV{'course.'.$cid.'.home'});
1425: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1426: return 'error: '.$reply;
1427: }
1428: # ---------------------------------------------------- Add student role to user
1429: my $uurl='/'.$cid;
1430: $uurl=~s/\_/\//g;
1431: if ($usec) {
1432: $uurl.='/'.$usec;
1433: }
1434: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1435: }
1436:
1437: # ------------------------------------------------- Write to course preferences
1438:
1439: sub writecoursepref {
1440: my ($courseid,%prefs)=@_;
1441: $courseid=~s/^\///;
1442: $courseid=~s/\_/\//g;
1443: my ($cdomain,$cnum)=split(/\//,$courseid);
1444: my $chome=homeserver($cnum,$cdomain);
1445: if (($chome eq '') || ($chome eq 'no_host')) {
1446: return 'error: no such course';
1447: }
1448: my $cstring='';
1449: map {
1450: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1451: } keys %prefs;
1452: $cstring=~s/\&$//;
1453: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1454: }
1455:
1456: # ---------------------------------------------------------- Make/modify course
1457:
1458: sub createcourse {
1459: my ($udom,$description,$url)=@_;
1460: $url=&declutter($url);
1461: my $cid='';
1462: unless (&allowed('ccc',$ENV{'user.domain'})) {
1463: return 'refused';
1464: }
1465: unless ($udom eq $ENV{'user.domain'}) {
1466: return 'refused';
1467: }
1468: # ------------------------------------------------------------------- Create ID
1469: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1470: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1471: # ----------------------------------------------- Make sure that does not exist
1472: my $uhome=&homeserver($uname,$udom);
1473: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1474: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1475: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1476: $uhome=&homeserver($uname,$udom);
1477: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1478: return 'error: unable to generate unique course-ID';
1479: }
1480: }
1481: # ------------------------------------------------------------- Make the course
1482: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1483: $ENV{'user.home'});
1484: unless ($reply eq 'ok') { return 'error: '.$reply; }
1485: my $uhome=&homeserver($uname,$udom);
1486: if (($uhome eq '') || ($uhome eq 'no_host')) {
1487: return 'error: no such course';
1488: }
1489: &writecoursepref($udom.'_'.$uname,
1490: ('description' => $description,
1491: 'url' => $url));
1492: return '/'.$udom.'/'.$uname;
1493: }
1494:
1495: # ---------------------------------------------------------- Assign Custom Role
1496:
1497: sub assigncustomrole {
1498: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1499: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1500: $end,$start);
1501: }
1502:
1503: # ----------------------------------------------------------------- Revoke Role
1504:
1505: sub revokerole {
1506: my ($udom,$uname,$url,$role)=@_;
1507: my $now=time;
1508: return &assignrole($udom,$uname,$url,$role,$now);
1509: }
1510:
1511: # ---------------------------------------------------------- Revoke Custom Role
1512:
1513: sub revokecustomrole {
1514: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1515: my $now=time;
1516: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1517: }
1518:
1519: # ------------------------------------------------------------ Directory lister
1520:
1521: sub dirlist {
1522: my $uri=shift;
1523: $uri=~s/^\///;
1524: $uri=~s/\/$//;
1525: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1526: if ($udom) {
1527: if ($uname) {
1528: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1529: homeserver($uname,$udom));
1530: return split(/:/,$listing);
1531: } else {
1532: my $tryserver;
1533: my %allusers=();
1534: foreach $tryserver (keys %libserv) {
1535: if ($hostdom{$tryserver} eq $udom) {
1536: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1537: $tryserver);
1538: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1539: && ($listing ne 'con_lost')) {
1540: map {
1541: my ($entry,@stat)=split(/&/,$_);
1542: $allusers{$entry}=1;
1543: } split(/:/,$listing);
1544: }
1545: }
1546: }
1547: my $alluserstr='';
1548: map {
1549: $alluserstr.=$_.'&user:';
1550: } sort keys %allusers;
1551: $alluserstr=~s/:$//;
1552: return split(/:/,$alluserstr);
1553: }
1554: } else {
1555: my $tryserver;
1556: my %alldom=();
1557: foreach $tryserver (keys %libserv) {
1558: $alldom{$hostdom{$tryserver}}=1;
1559: }
1560: my $alldomstr='';
1561: map {
1562: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1563: } sort keys %alldom;
1564: $alldomstr=~s/:$//;
1565: return split(/:/,$alldomstr);
1566: }
1567: }
1568:
1569: # -------------------------------------------------------- Value of a Condition
1570:
1571: sub directcondval {
1572: my $number=shift;
1573: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1574: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1575: } else {
1576: return 2;
1577: }
1578: }
1579:
1580: sub condval {
1581: my $condidx=shift;
1582: my $result=0;
1583: my $allpathcond='';
1584: map {
1585: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1586: $allpathcond.=
1587: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1588: }
1589: } split(/\|/,$condidx);
1590: $allpathcond=~s/\|$//;
1591: if ($ENV{'request.course.id'}) {
1592: if ($allpathcond) {
1593: my $operand='|';
1594: my @stack;
1595: map {
1596: if ($_ eq '(') {
1597: push @stack,($operand,$result)
1598: } elsif ($_ eq ')') {
1599: my $before=pop @stack;
1600: if (pop @stack eq '&') {
1601: $result=$result>$before?$before:$result;
1602: } else {
1603: $result=$result>$before?$result:$before;
1604: }
1605: } elsif (($_ eq '&') || ($_ eq '|')) {
1606: $operand=$_;
1607: } else {
1608: my $new=directcondval($_);
1609: if ($operand eq '&') {
1610: $result=$result>$new?$new:$result;
1611: } else {
1612: $result=$result>$new?$result:$new;
1613: }
1614: }
1615: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1616: }
1617: }
1618: return $result;
1619: }
1620:
1621: # --------------------------------------------------------- Value of a Variable
1622:
1623: sub EXT {
1624: my $varname=shift;
1625: unless ($varname) { return ''; }
1626: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1627: my $rest;
1628: if ($therest[0]) {
1629: $rest=join('.',@therest);
1630: } else {
1631: $rest='';
1632: }
1633: my $qualifierrest=$qualifier;
1634: if ($rest) { $qualifierrest.='.'.$rest; }
1635: my $spacequalifierrest=$space;
1636: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1637: if ($realm eq 'user') {
1638: # --------------------------------------------------------------- user.resource
1639: if ($space eq 'resource') {
1640: my %restored=&restore;
1641: return $restored{$qualifierrest};
1642: # ----------------------------------------------------------------- user.access
1643: } elsif ($space eq 'access') {
1644: return &allowed($qualifier,$rest);
1645: # ------------------------------------------ user.preferences, user.environment
1646: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1647: return $ENV{join('.',('environment',$qualifierrest))};
1648: # ----------------------------------------------------------------- user.course
1649: } elsif ($space eq 'course') {
1650: return $ENV{join('.',('request.course',$qualifier))};
1651: # ------------------------------------------------------------------- user.role
1652: } elsif ($space eq 'role') {
1653: my ($role,$where)=split(/\./,$ENV{'request.role'});
1654: if ($qualifier eq 'value') {
1655: return $role;
1656: } elsif ($qualifier eq 'extent') {
1657: return $where;
1658: }
1659: # ----------------------------------------------------------------- user.domain
1660: } elsif ($space eq 'domain') {
1661: return $ENV{'user.domain'};
1662: # ------------------------------------------------------------------- user.name
1663: } elsif ($space eq 'name') {
1664: return $ENV{'user.name'};
1665: # ---------------------------------------------------- Any other user namespace
1666: } else {
1667: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1668: my %reply=&get($space,$item);
1669: return $reply{$item};
1670: }
1671: } elsif ($realm eq 'request') {
1672: # ------------------------------------------------------------- request.browser
1673: if ($space eq 'browser') {
1674: return $ENV{'browser.'.$qualifier};
1675: # ------------------------------------------------------------ request.filename
1676: } else {
1677: return $ENV{'request.'.$spacequalifierrest};
1678: }
1679: } elsif ($realm eq 'course') {
1680: # ---------------------------------------------------------- course.description
1681: my $section='';
1682: if ($ENV{'request.course.sec'}) {
1683: $section='_'.$ENV{'request.course.sec'};
1684: }
1685: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1686: $spacequalifierrest};
1687: } elsif ($realm eq 'resource') {
1688: if ($ENV{'request.course.id'}) {
1689: # ----------------------------------------------------- Cascading lookup scheme
1690: my $symbp=&symbread();
1691: my $mapp=(split(/\_\_\_/,$symbp))[0];
1692:
1693: my $symbparm=$symbp.'.'.$spacequalifierrest;
1694: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1695:
1696: my $seclevel=
1697: $ENV{'request.course.id'}.'.['.
1698: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1699: my $seclevelr=
1700: $ENV{'request.course.id'}.'.['.
1701: $ENV{'request.course.sec'}.'].'.$symbparm;
1702: my $seclevelm=
1703: $ENV{'request.course.id'}.'.['.
1704: $ENV{'request.course.sec'}.'].'.$mapparm;
1705:
1706: my $courselevel=
1707: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1708: my $courselevelr=
1709: $ENV{'request.course.id'}.'.'.$symbparm;
1710: my $courselevelm=
1711: $ENV{'request.course.id'}.'.'.$mapparm;
1712:
1713: # ----------------------------------------------------------- first, check user
1714: my %resourcedata=get('resourcedata',
1715: ($courselevelr,$courselevelm,$courselevel));
1716: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1717: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1718:
1719: if ($resourcedata{$courselevelr}) {
1720: return $resourcedata{$courselevelr}; }
1721: if ($resourcedata{$courselevelm}) {
1722: return $resourcedata{$courselevelm}; }
1723: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1724:
1725: } else {
1726: if ($resourcedata{$courselevelr}!~/No such file/) {
1727: &logthis("<font color=blue>WARNING:".
1728: " Trying to get resource data for ".$ENV{'user.name'}." at "
1729: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1730: "</font>");
1731: }
1732: }
1733:
1734: # -------------------------------------------------------- second, check course
1735:
1736: my $reply=&reply('get:'.
1737: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1738: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1739: ':resourcedata:'.
1740: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1741: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1742: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1743: if ($reply!~/^error\:/) {
1744: map {
1745: if ($_) { return &unescape($_); }
1746: } split(/\&/,$reply);
1747: }
1748: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1749: &logthis("<font color=blue>WARNING:".
1750: " Getting ".$reply." asking for ".$varname." for ".
1751: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1752: ' at '.
1753: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1754: ' from '.
1755: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1756: "</font>");
1757: }
1758: # ------------------------------------------------------ third, check map parms
1759: my %parmhash=();
1760: my $thisparm='';
1761: if (tie(%parmhash,'GDBM_File',
1762: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1763: $thisparm=$parmhash{$symbparm};
1764: untie(%parmhash);
1765: }
1766: if ($thisparm) { return $thisparm; }
1767: }
1768:
1769: # --------------------------------------------- last, look in resource metadata
1770:
1771: $spacequalifierrest=~s/\./\_/;
1772: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1773: if ($metadata) { return $metadata; }
1774: $metadata=&metadata($ENV{'request.filename'},
1775: 'parameter_'.$spacequalifierrest);
1776: if ($metadata) { return $metadata; }
1777:
1778: # ---------------------------------------------------- Any other user namespace
1779: } elsif ($realm eq 'environment') {
1780: # ----------------------------------------------------------------- environment
1781: return $ENV{$spacequalifierrest};
1782: } elsif ($realm eq 'system') {
1783: # ----------------------------------------------------------------- system.time
1784: if ($space eq 'time') {
1785: return time;
1786: }
1787: }
1788: return '';
1789: }
1790:
1791: # ---------------------------------------------------------------- Get metadata
1792:
1793: sub metadata {
1794: my ($uri,$what)=@_;
1795:
1796: $uri=&declutter($uri);
1797: my $filename=$uri;
1798: $uri=~s/\.meta$//;
1799: unless ($metacache{$uri.':keys'}) {
1800: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1801: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1802: my $parser=HTML::TokeParser->new(\$metastring);
1803: my $token;
1804: while ($token=$parser->get_token) {
1805: if ($token->[0] eq 'S') {
1806: my $entry=$token->[1];
1807: my $unikey=$entry;
1808: if (defined($token->[2]->{'part'})) {
1809: $unikey.='_'.$token->[2]->{'part'};
1810: }
1811: if (defined($token->[2]->{'name'})) {
1812: $unikey.='_'.$token->[2]->{'name'};
1813: }
1814: if ($metacache{$uri.':keys'}) {
1815: $metacache{$uri.':keys'}.=','.$unikey;
1816: } else {
1817: $metacache{$uri.':keys'}=$unikey;
1818: }
1819: map {
1820: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1821: } @{$token->[3]};
1822: unless (
1823: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1824: ) { $metacache{$uri.':'.$unikey}=
1825: $metacache{$uri.':'.$unikey.'.default'};
1826: }
1827: }
1828: }
1829: }
1830: return $metacache{$uri.':'.$what};
1831: }
1832:
1833: # ------------------------------------------------- Update symbolic store links
1834:
1835: sub symblist {
1836: my ($mapname,%newhash)=@_;
1837: $mapname=declutter($mapname);
1838: my %hash;
1839: if (($ENV{'request.course.fn'}) && (%newhash)) {
1840: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1841: &GDBM_WRCREAT,0640)) {
1842: map {
1843: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1844: } keys %newhash;
1845: if (untie(%hash)) {
1846: return 'ok';
1847: }
1848: }
1849: }
1850: return 'error';
1851: }
1852:
1853: # ------------------------------------------------------ Return symb list entry
1854:
1855: sub symbread {
1856: my $thisfn=shift;
1857: unless ($thisfn) {
1858: $thisfn=$ENV{'request.filename'};
1859: }
1860: $thisfn=declutter($thisfn);
1861: my %hash;
1862: my %bighash;
1863: my $syval='';
1864: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1865: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1866: &GDBM_READER,0640)) {
1867: $syval=$hash{$thisfn};
1868: untie(%hash);
1869: }
1870: # ---------------------------------------------------------- There was an entry
1871: if ($syval) {
1872: unless ($syval=~/\_\d+$/) {
1873: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1874: &appenv('request.ambiguous' => $thisfn);
1875: return '';
1876: }
1877: $syval.=$1;
1878: }
1879: } else {
1880: # ------------------------------------------------------- Was not in symb table
1881: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1882: &GDBM_READER,0640)) {
1883: # ---------------------------------------------- Get ID(s) for current resource
1884: my $ids=$bighash{'ids_/res/'.$thisfn};
1885: unless ($ids) {
1886: $ids=$bighash{'ids_/'.$thisfn};
1887: }
1888: if ($ids) {
1889: # ------------------------------------------------------------------- Has ID(s)
1890: my @possibilities=split(/\,/,$ids);
1891: if ($#possibilities==0) {
1892: # ----------------------------------------------- There is only one possibility
1893: my ($mapid,$resid)=split(/\./,$ids);
1894: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1895: } else {
1896: # ------------------------------------------ There is more than one possibility
1897: my $realpossible=0;
1898: map {
1899: my $file=$bighash{'src_'.$_};
1900: if (&allowed('bre',$file)) {
1901: my ($mapid,$resid)=split(/\./,$_);
1902: if ($bighash{'map_type_'.$mapid} ne 'page') {
1903: $realpossible++;
1904: $syval=declutter($bighash{'map_id_'.$mapid}).
1905: '___'.$resid;
1906: }
1907: }
1908: } @possibilities;
1909: if ($realpossible!=1) { $syval=''; }
1910: }
1911: }
1912: untie(%bighash)
1913: }
1914: }
1915: if ($syval) {
1916: return $syval.'___'.$thisfn;
1917: }
1918: }
1919: &appenv('request.ambiguous' => $thisfn);
1920: return '';
1921: }
1922:
1923: # ---------------------------------------------------------- Return random seed
1924:
1925: sub numval {
1926: my $txt=shift;
1927: $txt=~tr/A-J/0-9/;
1928: $txt=~tr/a-j/0-9/;
1929: $txt=~tr/K-T/0-9/;
1930: $txt=~tr/k-t/0-9/;
1931: $txt=~tr/U-Z/0-5/;
1932: $txt=~tr/u-z/0-5/;
1933: $txt=~s/\D//g;
1934: return int($txt);
1935: }
1936:
1937: sub rndseed {
1938: my $symb;
1939: unless ($symb=&symbread()) { return time; }
1940: {
1941: use integer;
1942: my $symbchck=unpack("%32C*",$symb) << 27;
1943: my $symbseed=numval($symb) << 22;
1944: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1945: my $nameseed=numval($ENV{'user.name'}) << 12;
1946: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1947: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1948: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1949: #uncommenting these lines can break things!
1950: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1951: #&Apache::lonxml::debug("rndseed :$num:$symb");
1952: return $num;
1953: }
1954: }
1955:
1956: sub ireceipt {
1957: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1958: my $cuname=unpack("%32C*",$funame);
1959: my $cudom=unpack("%32C*",$fudom);
1960: my $cucourseid=unpack("%32C*",$fucourseid);
1961: my $cusymb=unpack("%32C*",$fusymb);
1962: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1963: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1964: ($cunique%$cuname+
1965: $cunique%$cudom+
1966: $cusymb%$cuname+
1967: $cusymb%$cudom+
1968: $cucourseid%$cuname+
1969: $cucourseid%$cudom);
1970: }
1971:
1972: sub receipt {
1973: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1974: $ENV{'request.course.id'},&symbread());
1975: }
1976:
1977: # ------------------------------------------------------------ Serves up a file
1978: # returns either the contents of the file or a -1
1979: sub getfile {
1980: my $file=shift;
1981: &repcopy($file);
1982: if (! -e $file ) { return -1; };
1983: my $fh=Apache::File->new($file);
1984: my $a='';
1985: while (<$fh>) { $a .=$_; }
1986: return $a
1987: }
1988:
1989: sub filelocation {
1990: my ($dir,$file) = @_;
1991: my $location;
1992: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1993: if ($file=~m:^/~:) { # is a contruction space reference
1994: $location = $file;
1995: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1996: } else {
1997: $file=~s/^$perlvar{'lonDocRoot'}//;
1998: $file=~s:^/*res::;
1999: if ( !( $file =~ m:^/:) ) {
2000: $location = $dir. '/'.$file;
2001: } else {
2002: $location = '/home/httpd/html/res'.$file;
2003: }
2004: }
2005: $location=~s://+:/:g; # remove duplicate /
2006: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2007: return $location;
2008: }
2009:
2010: sub hreflocation {
2011: my ($dir,$file)=@_;
2012: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2013: my $finalpath=filelocation($dir,$file);
2014: $finalpath=~s/^\/home\/httpd\/html//;
2015: return $finalpath;
2016: } else {
2017: return $file;
2018: }
2019: }
2020:
2021: # ------------------------------------------------------------- Declutters URLs
2022:
2023: sub declutter {
2024: my $thisfn=shift;
2025: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2026: $thisfn=~s/^\///;
2027: $thisfn=~s/^res\///;
2028: return $thisfn;
2029: }
2030:
2031: # -------------------------------------------------------- Escape Special Chars
2032:
2033: sub escape {
2034: my $str=shift;
2035: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2036: return $str;
2037: }
2038:
2039: # ----------------------------------------------------- Un-Escape Special Chars
2040:
2041: sub unescape {
2042: my $str=shift;
2043: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2044: return $str;
2045: }
2046:
2047: # ================================================================ Main Program
2048:
2049: sub BEGIN {
2050: if ($readit ne 'done') {
2051: # ------------------------------------------------------------ Read access.conf
2052: {
2053: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2054:
2055: while (my $configline=<$config>) {
2056: if ($configline =~ /PerlSetVar/) {
2057: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2058: chomp($varvalue);
2059: $perlvar{$varname}=$varvalue;
2060: }
2061: }
2062: }
2063:
2064: # ------------------------------------------------------------- Read hosts file
2065: {
2066: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2067:
2068: while (my $configline=<$config>) {
2069: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2070: $hostname{$id}=$name;
2071: $hostdom{$id}=$domain;
2072: if ($role eq 'library') { $libserv{$id}=$name; }
2073: }
2074: }
2075:
2076: # ------------------------------------------------------ Read spare server file
2077: {
2078: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2079:
2080: while (my $configline=<$config>) {
2081: chomp($configline);
2082: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2083: $spareid{$configline}=1;
2084: }
2085: }
2086: }
2087: # ------------------------------------------------------------ Read permissions
2088: {
2089: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2090:
2091: while (my $configline=<$config>) {
2092: chomp($configline);
2093: my ($role,$perm)=split(/ /,$configline);
2094: if ($perm ne '') { $pr{$role}=$perm; }
2095: }
2096: }
2097:
2098: # -------------------------------------------- Read plain texts for permissions
2099: {
2100: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2101:
2102: while (my $configline=<$config>) {
2103: chomp($configline);
2104: my ($short,$plain)=split(/:/,$configline);
2105: if ($plain ne '') { $prp{$short}=$plain; }
2106: }
2107: }
2108:
2109: # ------------------------------------------------------------- Read file types
2110: {
2111: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2112:
2113: while (my $configline=<$config>) {
2114: chomp($configline);
2115: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2116: if ($descr[0] ne '') {
2117: $fe{$ending}=$emb;
2118: $fd{$ending}=join(' ',@descr);
2119: }
2120: }
2121: }
2122:
2123: %metacache=();
2124:
2125: $readit='done';
2126: &logthis('<font color=yellow>INFO: Read configuration</font>');
2127: }
2128: }
2129: 1;
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