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