Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.103
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
4: # Functions for use by content handlers:
5: #
6: # plaintext(short) : plain text explanation of short term
1.25 www 7: # fileembstyle(ext) : embed style in page for file extension
8: # filedescription(ext) : descriptor text for file extension
1.29 www 9: # allowed(short,url) : returns codes for allowed actions
10: # F: full access
11: # U,I,K: authentication modes (cxx only)
12: # '': forbidden
13: # 1: user needs to choose course
14: # 2: browse allowed
1.21 www 15: # definerole(rolename,sys,dom,cou) : define a custom role rolename
1.103 ! harris41 16: # set privileges in format of lonTabs/roles.tab for
1.21 www 17: # system, domain and course level,
18: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
19: # level given by url. Optional start and end dates
20: # (leave empty string or zero for "no date")
21: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
22: # custom role to a user for the level given by url.
23: # Specify name and domain of role author, and role name
24: # revokerole (udom,uname,url,role) : Revoke a role for url
25: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
1.24 www 26: # appenv(hash) : adds hash to session environment
1.56 www 27: # delenv(varname) : deletes all environment entries starting with varname
1.12 www 28: # store(hash) : stores hash permanently for this url
1.47 www 29: # cstore(hash) : critical store
1.12 www 30: # restore : returns hash for this url
31: # eget(namesp,array) : returns hash with keys from array filled in from namesp
32: # get(namesp,array) : returns hash with keys from array filled in from namesp
1.38 www 33: # del(namesp,array) : deletes keys out of array from namesp
1.12 www 34: # put(namesp,hash) : stores hash in namesp
1.47 www 35: # cput(namesp,hash) : critical put
1.15 www 36: # dump(namesp) : dumps the complete namespace into a hash
1.23 www 37: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
38: # hash
1.34 www 39: # coursedescription(id) : returns and caches course description for id
1.17 www 40: # repcopy(filename) : replicate file
41: # dirlist(url) : gets a directory listing
1.40 www 42: # directcondval(index) : reading condition value of single condition from
43: # state string
1.28 www 44: # condval(index) : value of condition index based on state
1.58 www 45: # EXT(name) : value of a variable
1.31 www 46: # symblist(map,hash) : Updates symbolic storage links
1.44 www 47: # symbread([filename]) : returns the data handle (filename optional)
1.76 www 48: # rndseed() : returns a random seed
49: # receipt() : returns a receipt to be given out to users
1.36 albertel 50: # getfile(filename) : returns the contents of filename, or a -1 if it can't
51: # be found, replicates and subscribes to the file
52: # filelocation(dir,file) : returns a farily clean absolute reference to file
53: # from the directory dir
1.46 www 54: # hreflocation(dir,file) : same as filelocation, but for hrefs
1.47 www 55: # log(domain,user,home,msg) : write to permanent log for user
1.70 www 56: # usection(domain,user,courseid) : output of section name/number or '' for
57: # "not in course" and '-1' for "no section"
58: # userenvironment(domain,user,what) : puts out any environment parameter
59: # for a user
60: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
61: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
62: # an array of IDs
63: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
64: # an array of names
1.73 www 65: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
66: # returns a comma separated list of keys
1.12 www 67: #
1.1 albertel 68: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
1.5 www 69: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
1.8 www 70: # 11/8,11/16,11/18,11/22,11/23,12/22,
1.12 www 71: # 01/06,01/13,02/24,02/28,02/29,
72: # 03/01,03/02,03/06,03/07,03/13,
1.15 www 73: # 04/05,05/29,05/31,06/01,
74: # 06/05,06/26 Gerd Kortemeyer
75: # 06/26 Ben Tyszka
1.22 www 76: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
1.23 www 77: # 08/14 Ben Tyszka
1.36 albertel 78: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
1.35 www 79: # 10/04 Gerd Kortemeyer
1.36 albertel 80: # 10/04 Guy Albertelli
1.54 www 81: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
1.71 www 82: # 10/30,10/31,
1.75 www 83: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
1.83 www 84: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
1.87 www 85: # 05/01/01 Guy Albertelli
1.89 www 86: # 05/01,06/01,09/01 Gerd Kortemeyer
1.92 www 87: # 09/01 Guy Albertelli
1.102 www 88: # 09/01,10/01,11/01 Gerd Kortemeyer
1.103 ! harris41 89: # 02/27/01 Scott Harrison
1.1 albertel 90:
91: package Apache::lonnet;
92:
93: use strict;
94: use Apache::File;
1.8 www 95: use LWP::UserAgent();
1.15 www 96: use HTTP::Headers;
1.11 www 97: use vars
1.77 www 98: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
1.1 albertel 99: use IO::Socket;
1.31 www 100: use GDBM_File;
1.8 www 101: use Apache::Constants qw(:common :http);
1.71 www 102: use HTML::TokeParser;
1.88 www 103: use Fcntl qw(:flock);
1.1 albertel 104:
105: # --------------------------------------------------------------------- Logging
106:
107: sub logthis {
108: my $message=shift;
109: my $execdir=$perlvar{'lonDaemons'};
110: my $now=time;
111: my $local=localtime($now);
112: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
113: print $fh "$local ($$): $message\n";
114: return 1;
115: }
116:
117: sub logperm {
118: my $message=shift;
119: my $execdir=$perlvar{'lonDaemons'};
120: my $now=time;
121: my $local=localtime($now);
122: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
123: print $fh "$now:$message:$local\n";
124: return 1;
125: }
126:
127: # -------------------------------------------------- Non-critical communication
128: sub subreply {
129: my ($cmd,$server)=@_;
130: my $peerfile="$perlvar{'lonSockDir'}/$server";
131: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
132: Type => SOCK_STREAM,
133: Timeout => 10)
134: or return "con_lost";
135: print $client "$cmd\n";
136: my $answer=<$client>;
1.9 www 137: if (!$answer) { $answer="con_lost"; }
1.1 albertel 138: chomp($answer);
139: return $answer;
140: }
141:
142: sub reply {
143: my ($cmd,$server)=@_;
144: my $answer=subreply($cmd,$server);
145: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
1.65 www 146: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
1.12 www 147: &logthis("<font color=blue>WARNING:".
148: " $cmd to $server returned $answer</font>");
149: }
1.1 albertel 150: return $answer;
151: }
152:
153: # ----------------------------------------------------------- Send USR1 to lonc
154:
155: sub reconlonc {
156: my $peerfile=shift;
157: &logthis("Trying to reconnect for $peerfile");
158: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
159: if (my $fh=Apache::File->new("$loncfile")) {
160: my $loncpid=<$fh>;
161: chomp($loncpid);
162: if (kill 0 => $loncpid) {
163: &logthis("lonc at pid $loncpid responding, sending USR1");
164: kill USR1 => $loncpid;
165: sleep 1;
166: if (-e "$peerfile") { return; }
167: &logthis("$peerfile still not there, give it another try");
168: sleep 5;
169: if (-e "$peerfile") { return; }
1.12 www 170: &logthis(
171: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 172: } else {
1.12 www 173: &logthis(
174: "<font color=blue>WARNING:".
175: " lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 176: }
177: } else {
1.12 www 178: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
1.1 albertel 179: }
180: }
181:
182: # ------------------------------------------------------ Critical communication
1.12 www 183:
1.1 albertel 184: sub critical {
185: my ($cmd,$server)=@_;
1.89 www 186: unless ($hostname{$server}) {
187: &logthis("<font color=blue>WARNING:".
188: " Critical message to unknown server ($server)</font>");
189: return 'no_such_host';
190: }
1.1 albertel 191: my $answer=reply($cmd,$server);
192: if ($answer eq 'con_lost') {
193: my $pingreply=reply('ping',$server);
194: &reconlonc("$perlvar{'lonSockDir'}/$server");
195: my $pongreply=reply('pong',$server);
196: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
197: $answer=reply($cmd,$server);
198: if ($answer eq 'con_lost') {
199: my $now=time;
200: my $middlename=$cmd;
1.5 www 201: $middlename=substr($middlename,0,16);
1.1 albertel 202: $middlename=~s/\W//g;
203: my $dfilename=
204: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
205: {
206: my $dfh;
207: if ($dfh=Apache::File->new(">$dfilename")) {
1.7 www 208: print $dfh "$cmd\n";
1.1 albertel 209: }
210: }
211: sleep 2;
212: my $wcmd='';
213: {
214: my $dfh;
215: if ($dfh=Apache::File->new("$dfilename")) {
216: $wcmd=<$dfh>;
217: }
218: }
219: chomp($wcmd);
1.7 www 220: if ($wcmd eq $cmd) {
1.12 www 221: &logthis("<font color=blue>WARNING: ".
222: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 223: &logperm("D:$server:$cmd");
224: return 'con_delayed';
225: } else {
1.12 www 226: &logthis("<font color=red>CRITICAL:"
227: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 228: &logperm("F:$server:$cmd");
229: return 'con_failed';
230: }
231: }
232: }
233: return $answer;
234: }
235:
1.5 www 236: # ---------------------------------------------------------- Append Environment
237:
238: sub appenv {
1.6 www 239: my %newenv=@_;
1.35 www 240: map {
241: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
242: &logthis("<font color=blue>WARNING: ".
243: "Attempt to modify environment ".$_." to ".$newenv{$_});
244: delete($newenv{$_});
245: } else {
246: $ENV{$_}=$newenv{$_};
247: }
248: } keys %newenv;
1.95 www 249:
250: my $lockfh;
251: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 252: return 'error: '.$!;
1.95 www 253: }
254: unless (flock($lockfh,LOCK_EX)) {
255: &logthis("<font color=blue>WARNING: ".
256: 'Could not obtain exclusive lock in appenv: '.$!);
257: $lockfh->close();
258: return 'error: '.$!;
259: }
260:
1.6 www 261: my @oldenv;
262: {
263: my $fh;
264: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 265: return 'error: '.$!;
1.6 www 266: }
267: @oldenv=<$fh>;
1.89 www 268: $fh->close();
1.6 www 269: }
270: for (my $i=0; $i<=$#oldenv; $i++) {
271: chomp($oldenv[$i]);
1.9 www 272: if ($oldenv[$i] ne '') {
273: my ($name,$value)=split(/=/,$oldenv[$i]);
1.24 www 274: unless (defined($newenv{$name})) {
275: $newenv{$name}=$value;
276: }
1.9 www 277: }
1.6 www 278: }
279: {
280: my $fh;
281: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
282: return 'error';
283: }
284: my $newname;
1.93 www 285: foreach $newname (keys %newenv) {
1.6 www 286: print $fh "$newname=$newenv{$newname}\n";
287: }
1.86 albertel 288: $fh->close();
1.56 www 289: }
1.95 www 290:
291: $lockfh->close();
1.56 www 292: return 'ok';
293: }
294: # ----------------------------------------------------- Delete from Environment
295:
296: sub delenv {
297: my $delthis=shift;
298: my %newenv=();
299: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
300: &logthis("<font color=blue>WARNING: ".
301: "Attempt to delete from environment ".$delthis);
302: return 'error';
303: }
304: my @oldenv;
305: {
306: my $fh;
307: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
308: return 'error';
309: }
1.89 www 310: unless (flock($fh,LOCK_SH)) {
311: &logthis("<font color=blue>WARNING: ".
312: 'Could not obtain shared lock in delenv: '.$!);
313: $fh->close();
314: return 'error: '.$!;
315: }
1.56 www 316: @oldenv=<$fh>;
1.89 www 317: $fh->close();
1.56 www 318: }
319: {
320: my $fh;
321: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
322: return 'error';
323: }
1.89 www 324: unless (flock($fh,LOCK_EX)) {
325: &logthis("<font color=blue>WARNING: ".
326: 'Could not obtain exclusive lock in delenv: '.$!);
327: $fh->close();
328: return 'error: '.$!;
329: }
1.56 www 330: map {
331: unless ($_=~/^$delthis/) { print $fh $_; }
332: } @oldenv;
1.87 www 333: $fh->close();
1.5 www 334: }
335: return 'ok';
336: }
1.1 albertel 337:
338: # ------------------------------ Find server with least workload from spare.tab
1.11 www 339:
1.1 albertel 340: sub spareserver {
341: my $tryserver;
342: my $spareserver='';
343: my $lowestserver=100;
344: foreach $tryserver (keys %spareid) {
345: my $answer=reply('load',$tryserver);
346: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
347: $spareserver="http://$hostname{$tryserver}";
348: $lowestserver=$answer;
349: }
350: }
351: return $spareserver;
352: }
353:
354: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 355:
1.1 albertel 356: sub authenticate {
357: my ($uname,$upass,$udom)=@_;
1.12 www 358: $upass=escape($upass);
1.1 albertel 359: if (($perlvar{'lonRole'} eq 'library') &&
360: ($udom eq $perlvar{'lonDefDomain'})) {
1.3 www 361: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
1.2 www 362: if ($answer =~ /authorized/) {
1.9 www 363: if ($answer eq 'authorized') {
364: &logthis("User $uname at $udom authorized by local server");
365: return $perlvar{'lonHostID'};
366: }
367: if ($answer eq 'non_authorized') {
368: &logthis("User $uname at $udom rejected by local server");
369: return 'no_host';
370: }
1.2 www 371: }
1.1 albertel 372: }
373:
374: my $tryserver;
375: foreach $tryserver (keys %libserv) {
376: if ($hostdom{$tryserver} eq $udom) {
1.10 www 377: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
1.1 albertel 378: if ($answer =~ /authorized/) {
1.9 www 379: if ($answer eq 'authorized') {
380: &logthis("User $uname at $udom authorized by $tryserver");
381: return $tryserver;
382: }
383: if ($answer eq 'non_authorized') {
384: &logthis("User $uname at $udom rejected by $tryserver");
385: return 'no_host';
386: }
1.1 albertel 387: }
388: }
1.9 www 389: }
390: &logthis("User $uname at $udom could not be authenticated");
1.1 albertel 391: return 'no_host';
392: }
393:
394: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 395:
1.1 albertel 396: sub homeserver {
397: my ($uname,$udom)=@_;
398:
399: my $index="$uname:$udom";
400: if ($homecache{$index}) { return "$homecache{$index}"; }
401:
402: my $tryserver;
403: foreach $tryserver (keys %libserv) {
404: if ($hostdom{$tryserver} eq $udom) {
405: my $answer=reply("home:$udom:$uname",$tryserver);
406: if ($answer eq 'found') {
407: $homecache{$index}=$tryserver;
408: return $tryserver;
409: }
410: }
411: }
412: return 'no_host';
1.70 www 413: }
414:
415: # ------------------------------------- Find the usernames behind a list of IDs
416:
417: sub idget {
418: my ($udom,@ids)=@_;
419: my %returnhash=();
420:
421: my $tryserver;
422: foreach $tryserver (keys %libserv) {
423: if ($hostdom{$tryserver} eq $udom) {
424: my $idlist=join('&',@ids);
425: $idlist=~tr/A-Z/a-z/;
426: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
427: my @answer=();
1.76 www 428: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 429: @answer=split(/\&/,$reply);
430: } ;
431: my $i;
432: for ($i=0;$i<=$#ids;$i++) {
433: if ($answer[$i]) {
434: $returnhash{$ids[$i]}=$answer[$i];
435: }
436: }
437: }
438: }
439: return %returnhash;
440: }
441:
442: # ------------------------------------- Find the IDs behind a list of usernames
443:
444: sub idrget {
445: my ($udom,@unames)=@_;
446: my %returnhash=();
447: map {
448: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
449: } @unames;
450: return %returnhash;
451: }
452:
453: # ------------------------------- Store away a list of names and associated IDs
454:
455: sub idput {
456: my ($udom,%ids)=@_;
457: my %servers=();
458: map {
459: my $uhom=&homeserver($_,$udom);
460: if ($uhom ne 'no_host') {
461: my $id=&escape($ids{$_});
462: $id=~tr/A-Z/a-z/;
463: my $unam=&escape($_);
464: if ($servers{$uhom}) {
465: $servers{$uhom}.='&'.$id.'='.$unam;
466: } else {
467: $servers{$uhom}=$id.'='.$unam;
468: }
469: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
470: }
471: } keys %ids;
472: map {
473: &critical('idput:'.$udom.':'.$servers{$_},$_);
474: } keys %servers;
475: }
476:
477: # ------------------------------------- Find the section of student in a course
478:
479: sub usection {
480: my ($udom,$unam,$courseid)=@_;
481: $courseid=~s/\_/\//g;
482: $courseid=~s/^(\w)/\/$1/;
483: map {
484: my ($key,$value)=split(/\=/,$_);
485: $key=&unescape($key);
486: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
487: my $section=$1;
488: if ($key eq $courseid.'_st') { $section=''; }
489: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
490: my $now=time;
491: my $notactive=0;
492: if ($start) {
493: if ($now<$start) { $notactive=1; }
494: }
495: if ($end) {
496: if ($now>$end) { $notactive=1; }
497: }
498: unless ($notactive) { return $section; }
499: }
500: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
501: &homeserver($unam,$udom)));
502: return '-1';
503: }
504:
505: # ------------------------------------- Read an entry from a user's environment
506:
507: sub userenvironment {
508: my ($udom,$unam,@what)=@_;
509: my %returnhash=();
510: my @answer=split(/\&/,
511: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
512: &homeserver($unam,$udom)));
513: my $i;
514: for ($i=0;$i<=$#what;$i++) {
515: $returnhash{$what[$i]}=&unescape($answer[$i]);
516: }
517: return %returnhash;
1.1 albertel 518: }
519:
520: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 521:
1.1 albertel 522: sub subscribe {
523: my $fname=shift;
524: my $author=$fname;
525: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
526: my ($udom,$uname)=split(/\//,$author);
527: my $home=homeserver($uname,$udom);
528: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
529: return 'not_found';
530: }
531: my $answer=reply("sub:$fname",$home);
1.64 www 532: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
533: $answer.=' by '.$home;
534: }
1.1 albertel 535: return $answer;
536: }
537:
1.8 www 538: # -------------------------------------------------------------- Replicate file
539:
540: sub repcopy {
541: my $filename=shift;
1.23 www 542: $filename=~s/\/+/\//g;
1.8 www 543: my $transname="$filename.in.transfer";
1.17 www 544: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 545: my $remoteurl=subscribe($filename);
1.64 www 546: if ($remoteurl =~ /^con_lost by/) {
547: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 548: return HTTP_SERVICE_UNAVAILABLE;
549: } elsif ($remoteurl eq 'not_found') {
550: &logthis("Subscribe returned not_found: $filename");
551: return HTTP_NOT_FOUND;
1.64 www 552: } elsif ($remoteurl =~ /^rejected by/) {
553: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 554: return FORBIDDEN;
1.20 www 555: } elsif ($remoteurl eq 'directory') {
556: return OK;
1.8 www 557: } else {
558: my @parts=split(/\//,$filename);
559: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
560: if ($path ne "$perlvar{'lonDocRoot'}/res") {
561: &logthis("Malconfiguration for replication: $filename");
562: return HTTP_BAD_REQUEST;
563: }
564: my $count;
565: for ($count=5;$count<$#parts;$count++) {
566: $path.="/$parts[$count]";
567: if ((-e $path)!=1) {
568: mkdir($path,0777);
569: }
570: }
571: my $ua=new LWP::UserAgent;
572: my $request=new HTTP::Request('GET',"$remoteurl");
573: my $response=$ua->request($request,$transname);
574: if ($response->is_error()) {
575: unlink($transname);
576: my $message=$response->status_line;
1.12 www 577: &logthis("<font color=blue>WARNING:"
578: ." LWP get: $message: $filename</font>");
1.8 www 579: return HTTP_SERVICE_UNAVAILABLE;
580: } else {
1.16 www 581: if ($remoteurl!~/\.meta$/) {
582: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
583: my $mresponse=$ua->request($mrequest,$filename.'.meta');
584: if ($mresponse->is_error()) {
585: unlink($filename.'.meta');
586: &logthis(
587: "<font color=yellow>INFO: No metadata: $filename</font>");
588: }
589: }
1.8 www 590: rename($transname,$filename);
591: return OK;
592: }
593: }
594: }
595:
1.15 www 596: # --------------------------------------------------------- Server Side Include
597:
598: sub ssi {
599:
1.23 www 600: my ($fn,%form)=@_;
1.15 www 601:
602: my $ua=new LWP::UserAgent;
1.23 www 603:
604: my $request;
605:
606: if (%form) {
607: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
608: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
609: } else {
610: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
611: }
612:
1.15 www 613: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
614: my $response=$ua->request($request);
615:
616: return $response->content;
617: }
618:
1.14 www 619: # ------------------------------------------------------------------------- Log
620:
621: sub log {
622: my ($dom,$nam,$hom,$what)=@_;
1.47 www 623: return critical("log:$dom:$nam:$what",$hom);
1.14 www 624: }
625:
1.9 www 626: # ----------------------------------------------------------------------- Store
627:
628: sub store {
1.31 www 629: my %storehash=@_;
630: my $symb;
1.44 www 631: unless ($symb=escape(&symbread())) { return ''; }
1.31 www 632: my $namespace;
1.33 www 633: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
1.12 www 634: my $namevalue='';
635: map {
636: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
637: } keys %storehash;
638: $namevalue=~s/\&$//;
1.31 www 639: return reply(
640: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
1.12 www 641: "$ENV{'user.home'}");
1.9 www 642: }
643:
1.47 www 644: # -------------------------------------------------------------- Critical Store
645:
646: sub cstore {
647: my %storehash=@_;
648: my $symb;
649: unless ($symb=escape(&symbread())) { return ''; }
650: my $namespace;
651: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
652: my $namevalue='';
653: map {
654: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
655: } keys %storehash;
656: $namevalue=~s/\&$//;
657: return critical(
658: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
659: "$ENV{'user.home'}");
660: }
661:
1.9 www 662: # --------------------------------------------------------------------- Restore
663:
664: sub restore {
1.31 www 665: my $symb;
1.44 www 666: unless ($symb=escape(&symbread())) { return ''; }
1.31 www 667: my $namespace;
1.33 www 668: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
1.31 www 669: my $answer=reply(
670: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
671: "$ENV{'user.home'}");
1.12 www 672: my %returnhash=();
673: map {
674: my ($name,$value)=split(/\=/,$_);
675: $returnhash{&unescape($name)}=&unescape($value);
676: } split(/\&/,$answer);
1.75 www 677: my $version;
678: for ($version=1;$version<=$returnhash{'version'};$version++) {
679: map {
680: $returnhash{$_}=$returnhash{$version.':'.$_};
681: } split(/\:/,$returnhash{$version.':keys'});
682: }
1.13 www 683: return %returnhash;
1.34 www 684: }
685:
686: # ---------------------------------------------------------- Course Description
687:
688: sub coursedescription {
689: my $courseid=shift;
690: $courseid=~s/^\///;
1.49 www 691: $courseid=~s/\_/\//g;
1.34 www 692: my ($cdomain,$cnum)=split(/\//,$courseid);
693: my $chome=homeserver($cnum,$cdomain);
694: if ($chome ne 'no_host') {
695: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
696: if ($rep ne 'con_lost') {
1.96 www 697: my $normalid=$cdomain.'_'.$cnum;
1.53 www 698: my %envhash=();
1.34 www 699: my %returnhash=('home' => $chome,
700: 'domain' => $cdomain,
701: 'num' => $cnum);
702: map {
703: my ($name,$value)=split(/\=/,$_);
704: $name=&unescape($name);
705: $value=&unescape($value);
706: $returnhash{$name}=$value;
1.53 www 707: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.34 www 708: } split(/\&/,$rep);
709: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
710: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 711: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.54 www 712: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.60 www 713: $envhash{'course.'.$normalid.'.home'}=$chome;
714: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
715: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.53 www 716: &appenv(%envhash);
1.34 www 717: return %returnhash;
718: }
719: }
720: return ();
1.9 www 721: }
1.1 albertel 722:
1.103 ! harris41 723: # -------------------------------------------------------- Get user privileges
1.11 www 724:
725: sub rolesinit {
726: my ($domain,$username,$authhost)=@_;
727: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 728: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 729: my %allroles=();
730: my %thesepriv=();
731: my $now=time;
1.21 www 732: my $userroles="user.login.time=$now\n";
1.11 www 733: my $thesestr;
734:
735: if ($rolesdump ne '') {
736: map {
1.21 www 737: if ($_!~/^rolesdef\&/) {
1.11 www 738: my ($area,$role)=split(/=/,$_);
1.21 www 739: $area=~s/\_\w\w$//;
1.11 www 740: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 741: $userroles.='user.role.'.$trole.'.'.$area.'='.
742: $tstart.'.'.$tend."\n";
1.11 www 743: if ($tend!=0) {
744: if ($tend<$now) {
745: $trole='';
746: }
747: }
748: if ($tstart!=0) {
749: if ($tstart>$now) {
750: $trole='';
751: }
752: }
753: if (($area ne '') && ($trole ne '')) {
1.50 www 754: my $spec=$trole.'.'.$area;
1.12 www 755: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
756: if ($trole =~ /^cr\//) {
757: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
758: my $homsvr=homeserver($rauthor,$rdomain);
759: if ($hostname{$homsvr} ne '') {
760: my $roledef=
1.21 www 761: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1.12 www 762: $homsvr);
763: if (($roledef ne 'con_lost') && ($roledef ne '')) {
764: my ($syspriv,$dompriv,$coursepriv)=
1.21 www 765: split(/\_/,unescape($roledef));
1.50 www 766: $allroles{'cm./'}.=':'.$syspriv;
767: $allroles{$spec.'./'}.=':'.$syspriv;
1.12 www 768: if ($tdomain ne '') {
1.50 www 769: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
770: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1.12 www 771: if ($trest ne '') {
1.50 www 772: $allroles{'cm.'.$area}.=':'.$coursepriv;
773: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1.12 www 774: }
775: }
776: }
1.11 www 777: }
1.12 www 778: } else {
1.50 www 779: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
780: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1.12 www 781: if ($tdomain ne '') {
1.50 www 782: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
783: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1.12 www 784: if ($trest ne '') {
1.50 www 785: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
786: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1.12 www 787: }
788: }
1.11 www 789: }
1.12 www 790: }
791: }
1.11 www 792: } split(/&/,$rolesdump);
793: map {
794: %thesepriv=();
795: map {
796: if ($_ ne '') {
1.103 ! harris41 797: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 798: if ($restrictions eq '') {
1.103 ! harris41 799: $thesepriv{$privilege}='F';
1.11 www 800: } else {
1.103 ! harris41 801: if ($thesepriv{$privilege} ne 'F') {
! 802: $thesepriv{$privilege}.=$restrictions;
1.11 www 803: }
804: }
805: }
806: } split(/:/,$allroles{$_});
807: $thesestr='';
808: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
809: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
810: } keys %allroles;
811: }
812: return $userroles;
813: }
814:
1.12 www 815: # --------------------------------------------------------------- get interface
816:
817: sub get {
818: my ($namespace,@storearr)=@_;
819: my $items='';
820: map {
821: $items.=escape($_).'&';
822: } @storearr;
823: $items=~s/\&$//;
824: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
825: $ENV{'user.home'});
1.15 www 826: my @pairs=split(/\&/,$rep);
827: my %returnhash=();
1.42 www 828: my $i=0;
1.15 www 829: map {
1.42 www 830: $returnhash{$_}=unescape($pairs[$i]);
831: $i++;
832: } @storearr;
1.15 www 833: return %returnhash;
1.27 www 834: }
835:
836: # --------------------------------------------------------------- del interface
837:
838: sub del {
839: my ($namespace,@storearr)=@_;
840: my $items='';
841: map {
842: $items.=escape($_).'&';
843: } @storearr;
844: $items=~s/\&$//;
845: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
846: $ENV{'user.home'});
1.15 www 847: }
848:
849: # -------------------------------------------------------------- dump interface
850:
851: sub dump {
852: my $namespace=shift;
853: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
854: $ENV{'user.home'});
1.12 www 855: my @pairs=split(/\&/,$rep);
856: my %returnhash=();
857: map {
858: my ($key,$value)=split(/=/,$_);
1.29 www 859: $returnhash{unescape($key)}=unescape($value);
1.12 www 860: } @pairs;
861: return %returnhash;
862: }
863:
864: # --------------------------------------------------------------- put interface
865:
866: sub put {
867: my ($namespace,%storehash)=@_;
868: my $items='';
869: map {
870: $items.=escape($_).'='.escape($storehash{$_}).'&';
871: } keys %storehash;
872: $items=~s/\&$//;
873: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
1.47 www 874: $ENV{'user.home'});
875: }
876:
877: # ------------------------------------------------------ critical put interface
878:
879: sub cput {
880: my ($namespace,%storehash)=@_;
881: my $items='';
882: map {
883: $items.=escape($_).'='.escape($storehash{$_}).'&';
884: } keys %storehash;
885: $items=~s/\&$//;
886: return critical
887: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
1.12 www 888: $ENV{'user.home'});
889: }
890:
891: # -------------------------------------------------------------- eget interface
892:
893: sub eget {
894: my ($namespace,@storearr)=@_;
895: my $items='';
896: map {
897: $items.=escape($_).'&';
898: } @storearr;
899: $items=~s/\&$//;
900: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
901: $ENV{'user.home'});
902: my @pairs=split(/\&/,$rep);
903: my %returnhash=();
1.42 www 904: my $i=0;
1.12 www 905: map {
1.42 www 906: $returnhash{$_}=unescape($pairs[$i]);
907: $i++;
908: } @storearr;
1.12 www 909: return %returnhash;
910: }
911:
1.103 ! harris41 912: # ------------------------------------------------- Check for a user privilege
1.12 www 913:
914: sub allowed {
915: my ($priv,$uri)=@_;
1.52 www 916: $uri=&declutter($uri);
1.29 www 917:
1.54 www 918: # Free bre access to adm and meta resources
1.29 www 919:
1.54 www 920: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 921: return 'F';
922: }
1.29 www 923:
1.52 www 924: my $thisallowed='';
925: my $statecond=0;
926: my $courseprivid='';
927:
928: # Course
929:
930: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
931: $thisallowed.=$1;
932: }
1.29 www 933:
1.52 www 934: # Domain
935:
936: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
937: =~/$priv\&([^\:]*)/) {
1.12 www 938: $thisallowed.=$1;
939: }
1.52 www 940:
941: # Course: uri itself is a course
1.66 www 942: my $courseuri=$uri;
943: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 944: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 945:
1.83 www 946: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.52 www 947: =~/$priv\&([^\:]*)/) {
1.12 www 948: $thisallowed.=$1;
949: }
1.29 www 950:
1.52 www 951: # Full access at system, domain or course-wide level? Exit.
1.29 www 952:
953: if ($thisallowed=~/F/) {
954: return 'F';
955: }
956:
1.52 www 957: # If this is generating or modifying users, exit with special codes
1.29 www 958:
1.52 www 959: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
960: return $thisallowed;
961: }
962: #
1.103 ! harris41 963: # Gathered so far: system, domain and course wide privileges
1.52 www 964: #
965: # Course: See if uri or referer is an individual resource that is part of
966: # the course
967:
968: if ($ENV{'request.course.id'}) {
969: $courseprivid=$ENV{'request.course.id'};
970: if ($ENV{'request.course.sec'}) {
971: $courseprivid.='/'.$ENV{'request.course.sec'};
972: }
973: $courseprivid=~s/\_/\//;
974: my $checkreferer=1;
975: my @uriparts=split(/\//,$uri);
976: my $filename=$uriparts[$#uriparts];
977: my $pathname=$uri;
978: $pathname=~s/\/$filename$//;
979: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.54 www 980: /\&$filename\:([\d\|]+)\&/) {
1.52 www 981: $statecond=$1;
982: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
983: =~/$priv\&([^\:]*)/) {
984: $thisallowed.=$1;
985: $checkreferer=0;
986: }
1.29 www 987: }
1.83 www 988:
1.52 www 989: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1.55 www 990: my $refuri=$ENV{'HTTP_REFERER'};
991: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
992: $refuri=&declutter($refuri);
1.53 www 993: my @uriparts=split(/\//,$refuri);
1.52 www 994: my $filename=$uriparts[$#uriparts];
1.53 www 995: my $pathname=$refuri;
1.52 www 996: $pathname=~s/\/$filename$//;
1.55 www 997: my @filenameparts=split(/\./,$uri);
1.53 www 998: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
999: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.54 www 1000: /\&$filename\:([\d\|]+)\&/) {
1.53 www 1001: my $refstatecond=$1;
1.52 www 1002: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1003: =~/$priv\&([^\:]*)/) {
1004: $thisallowed.=$1;
1.53 www 1005: $uri=$refuri;
1006: $statecond=$refstatecond;
1.52 www 1007: }
1.53 www 1008: }
1.52 www 1009: }
1.29 www 1010: }
1.52 www 1011: }
1.29 www 1012:
1.52 www 1013: #
1.103 ! harris41 1014: # Gathered now: all privileges that could apply, and condition number
1.52 www 1015: #
1016: #
1017: # Full or no access?
1018: #
1.29 www 1019:
1.52 www 1020: if ($thisallowed=~/F/) {
1021: return 'F';
1022: }
1.29 www 1023:
1.52 www 1024: unless ($thisallowed) {
1025: return '';
1026: }
1.29 www 1027:
1.52 www 1028: # Restrictions exist, deal with them
1029: #
1030: # C:according to course preferences
1031: # R:according to resource settings
1032: # L:unless locked
1033: # X:according to user session state
1034: #
1035:
1036: # Possibly locked functionality, check all courses
1.54 www 1037: # Locks might take effect only after 10 minutes cache expiration for other
1038: # courses, and 2 minutes for current course
1.52 www 1039:
1040: my $envkey;
1041: if ($thisallowed=~/L/) {
1042: foreach $envkey (keys %ENV) {
1.54 www 1043: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1044: my $courseid=$2;
1045: my $roleid=$1.'.'.$2;
1.92 www 1046: $courseid=~s/^\///;
1.54 www 1047: my $expiretime=600;
1048: if ($ENV{'request.role'} eq $roleid) {
1049: $expiretime=120;
1050: }
1051: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1052: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1053: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1054: &coursedescription($courseid);
1055: }
1056: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1057: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1058: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 1059: &log($ENV{'user.domain'},$ENV{'user.name'},
1060: $ENV{'user.host'},
1061: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 1062: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 1063: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 1064: return '';
1065: }
1066: }
1.54 www 1067: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1068: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1069: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 1070: &log($ENV{'user.domain'},$ENV{'user.name'},
1071: $ENV{'user.host'},
1072: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 1073: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 1074: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 1075: return '';
1076: }
1077: }
1078: }
1.29 www 1079: }
1.52 www 1080: }
1081:
1082: #
1083: # Rest of the restrictions depend on selected course
1084: #
1085:
1086: unless ($ENV{'request.course.id'}) {
1087: return '1';
1088: }
1.29 www 1089:
1.52 www 1090: #
1091: # Now user is definitely in a course
1092: #
1.53 www 1093:
1094:
1095: # Course preferences
1096:
1097: if ($thisallowed=~/C/) {
1.54 www 1098: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1099: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1100: =~/\,$rolecode\,/) {
1.57 www 1101: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1102: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.54 www 1103: $ENV{'request.course.id'});
1104: return '';
1105: }
1.53 www 1106: }
1107:
1108: # Resource preferences
1109:
1110: if ($thisallowed=~/R/) {
1.54 www 1111: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1112: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1113: if (-e $filename) {
1114: my @content;
1115: {
1116: my $fh=Apache::File->new($filename);
1117: @content=<$fh>;
1118: }
1119: if (join('',@content)=~
1120: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1.57 www 1121: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1122: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.54 www 1123: return '';
1124:
1125: }
1126: }
1.53 www 1127: }
1.30 www 1128:
1.52 www 1129: # Restricted by state?
1.30 www 1130:
1.52 www 1131: if ($thisallowed=~/X/) {
1132: if (&condval($statecond)) {
1133: return '2';
1134: } else {
1135: return '';
1136: }
1137: }
1.30 www 1138:
1.52 www 1139: return 'F';
1.12 www 1140: }
1141:
1142: # ----------------------------------------------------------------- Define Role
1143:
1144: sub definerole {
1145: if (allowed('mcr','/')) {
1146: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.21 www 1147: map {
1148: my ($crole,$cqual)=split(/\&/,$_);
1149: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1150: if ($pr{'cr:s'}=~/$crole\&/) {
1151: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1152: return "refused:s:$crole&$cqual";
1153: }
1154: }
1155: } split('/',$sysrole);
1156: map {
1157: my ($crole,$cqual)=split(/\&/,$_);
1158: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1159: if ($pr{'cr:d'}=~/$crole\&/) {
1160: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1161: return "refused:d:$crole&$cqual";
1162: }
1163: }
1164: } split('/',$domrole);
1165: map {
1166: my ($crole,$cqual)=split(/\&/,$_);
1167: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1168: if ($pr{'cr:c'}=~/$crole\&/) {
1169: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1170: return "refused:c:$crole&$cqual";
1171: }
1172: }
1173: } split('/',$courole);
1.12 www 1174: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1175: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 1176: "rolesdef_$rolename=".
1177: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 1178: return reply($command,$ENV{'user.home'});
1179: } else {
1180: return 'refused';
1181: }
1182: }
1183:
1184: # ------------------------------------------------------------------ Plain Text
1185:
1186: sub plaintext {
1.22 www 1187: my $short=shift;
1188: return $prp{$short};
1.12 www 1189: }
1190:
1.25 www 1191: # ------------------------------------------------------------------ Plain Text
1192:
1193: sub fileembstyle {
1194: my $ending=shift;
1195: return $fe{$ending};
1196: }
1197:
1198: # ------------------------------------------------------------ Description Text
1199:
1.74 www 1200: sub filedescription {
1.25 www 1201: my $ending=shift;
1202: return $fd{$ending};
1203: }
1204:
1.12 www 1205: # ----------------------------------------------------------------- Assign Role
1206:
1207: sub assignrole {
1.21 www 1208: my ($udom,$uname,$url,$role,$end,$start)=@_;
1209: my $mrole;
1210: if ($role =~ /^cr\//) {
1.81 www 1211: unless (&allowed('ccr',$url)) { return 'refused'; }
1.21 www 1212: $mrole='cr';
1213: } else {
1.82 www 1214: my $cwosec=$url;
1.83 www 1215: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.82 www 1216: unless (&allowed('c'.$role,$cwosec)) { return 'refused'; }
1.21 www 1217: $mrole=$role;
1218: }
1219: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1220: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 1221: if ($end) { $command.='_'.$end; }
1.21 www 1222: if ($start) {
1223: if ($end) {
1.81 www 1224: $command.='_'.$start;
1.21 www 1225: } else {
1.81 www 1226: $command.='_0_'.$start;
1.21 www 1227: }
1228: }
1229: return &reply($command,&homeserver($uname,$udom));
1.80 www 1230: }
1231:
1.81 www 1232: # --------------------------------------------------------------- Modify a user
1.80 www 1233:
1234:
1.81 www 1235: sub modifyuser {
1.80 www 1236: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1.81 www 1237: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 1238: $umode.', '.$first.', '.$middle.', '.
1239: $last.', '.$gene.' by '.
1240: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1241: my $uhome=&homeserver($uname,$udom);
1242: # ----------------------------------------------------------------- Create User
1.81 www 1243: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1.80 www 1244: my $unhome='';
1245: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1246: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1247: } else {
1248: my $tryserver;
1.81 www 1249: my $loadm=10000000;
1.80 www 1250: foreach $tryserver (keys %libserv) {
1251: if ($hostdom{$tryserver} eq $udom) {
1252: my $answer=reply('load',$tryserver);
1253: if (($answer=~/\d+/) && ($answer<$loadm)) {
1254: $loadm=$answer;
1255: $unhome=$tryserver;
1256: }
1257: }
1258: }
1259: }
1260: if (($unhome eq '') || ($unhome eq 'no_host')) {
1261: return 'error: find home';
1262: }
1263: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1264: &escape($upass),$unhome);
1265: unless ($reply eq 'ok') {
1266: return 'error: '.$reply;
1267: }
1268: $uhome=&homeserver($uname,$udom);
1269: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1270: return 'error: verify home';
1271: }
1272: }
1273: # ---------------------------------------------------------------------- Add ID
1274: if ($uid) {
1275: $uid=~tr/A-Z/a-z/;
1276: my %uidhash=&idrget($udom,$uname);
1277: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1278: unless ($uid eq $uidhash{$uname}) {
1279: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1280: }
1281: } else {
1282: &idput($udom,($uname => $uid));
1283: }
1284: }
1285: # -------------------------------------------------------------- Add names, etc
1286: my $names=&reply('get:'.$udom.':'.$uname.
1287: ':environment:firstname&middlename&lastname&generation',
1288: $uhome);
1289: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1.81 www 1290: if ($first) { $efirst = &escape($first); }
1291: if ($middle) { $emiddle = &escape($middle); }
1292: if ($last) { $elast = &escape($last); }
1293: if ($gene) { $egene = &escape($gene); }
1.80 www 1294: my $reply=&reply('put:'.$udom.':'.$uname.
1295: ':environment:firstname='.$efirst.
1296: '&middlename='.$emiddle.
1297: '&lastname='.$elast.
1298: '&generation='.$egene,$uhome);
1299: if ($reply ne 'ok') {
1300: return 'error: '.$reply;
1301: }
1.81 www 1302: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 1303: $umode.', '.$first.', '.$middle.', '.
1304: $last.', '.$gene.' by '.
1305: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1306: return 'ok';
1307: }
1308:
1.81 www 1309: # -------------------------------------------------------------- Modify student
1.80 www 1310:
1.81 www 1311: sub modifystudent {
1312: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1313: $end,$start)=@_;
1314: my $cid='';
1315: unless ($cid=$ENV{'request.course.id'}) {
1.80 www 1316: return 'not_in_class';
1317: }
1318: # --------------------------------------------------------------- Make the user
1.81 www 1319: my $reply=&modifyuser
1.80 www 1320: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1321: unless ($reply eq 'ok') { return $reply; }
1.81 www 1322: my $uhome=&homeserver($uname,$udom);
1323: if (($uhome eq '') || ($uhome eq 'no_host')) {
1324: return 'error: no such user';
1325: }
1.80 www 1326: # -------------------------------------------------- Add student to course list
1.81 www 1327: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1328: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1329: &escape($uname.':'.$udom).'='.
1330: &escape($end.':'.$start),
1331: $ENV{'course.'.$cid.'.home'});
1332: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1333: return 'error: '.$reply;
1334: }
1.80 www 1335: # ---------------------------------------------------- Add student role to user
1.83 www 1336: my $uurl='/'.$cid;
1.81 www 1337: $uurl=~s/\_/\//g;
1338: if ($usec) {
1339: $uurl.='/'.$usec;
1340: }
1341: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 1342: }
1343:
1.84 www 1344: # ------------------------------------------------- Write to course preferences
1345:
1346: sub writecoursepref {
1347: my ($courseid,%prefs)=@_;
1348: $courseid=~s/^\///;
1349: $courseid=~s/\_/\//g;
1350: my ($cdomain,$cnum)=split(/\//,$courseid);
1351: my $chome=homeserver($cnum,$cdomain);
1352: if (($chome eq '') || ($chome eq 'no_host')) {
1353: return 'error: no such course';
1354: }
1355: my $cstring='';
1356: map {
1357: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1358: } keys %prefs;
1359: $cstring=~s/\&$//;
1360: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1361: }
1362:
1363: # ---------------------------------------------------------- Make/modify course
1364:
1365: sub createcourse {
1366: my ($udom,$description,$url)=@_;
1367: $url=&declutter($url);
1368: my $cid='';
1369: unless (&allowed('ccc',$ENV{'user.domain'})) {
1370: return 'refused';
1371: }
1372: unless ($udom eq $ENV{'user.domain'}) {
1373: return 'refused';
1374: }
1375: # ------------------------------------------------------------------- Create ID
1376: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1377: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1378: # ----------------------------------------------- Make sure that does not exist
1379: my $uhome=&homeserver($uname,$udom);
1380: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1381: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1382: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1383: $uhome=&homeserver($uname,$udom);
1384: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1385: return 'error: unable to generate unique course-ID';
1386: }
1387: }
1388: # ------------------------------------------------------------- Make the course
1389: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1390: $ENV{'user.home'});
1391: unless ($reply eq 'ok') { return 'error: '.$reply; }
1392: my $uhome=&homeserver($uname,$udom);
1393: if (($uhome eq '') || ($uhome eq 'no_host')) {
1394: return 'error: no such course';
1395: }
1396: &writecoursepref($udom.'_'.$uname,
1397: ('description' => $description,
1398: 'url' => $url));
1399: return '/'.$udom.'/'.$uname;
1400: }
1401:
1.21 www 1402: # ---------------------------------------------------------- Assign Custom Role
1403:
1404: sub assigncustomrole {
1405: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1406: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1407: $end,$start);
1408: }
1409:
1410: # ----------------------------------------------------------------- Revoke Role
1411:
1412: sub revokerole {
1413: my ($udom,$uname,$url,$role)=@_;
1414: my $now=time;
1415: return &assignrole($udom,$uname,$url,$role,$now);
1416: }
1417:
1418: # ---------------------------------------------------------- Revoke Custom Role
1419:
1420: sub revokecustomrole {
1421: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1422: my $now=time;
1423: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1.17 www 1424: }
1425:
1426: # ------------------------------------------------------------ Directory lister
1427:
1428: sub dirlist {
1429: my $uri=shift;
1.18 www 1430: $uri=~s/^\///;
1431: $uri=~s/\/$//;
1.19 www 1432: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1433: if ($udom) {
1434: if ($uname) {
1435: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1436: homeserver($uname,$udom));
1437: return split(/:/,$listing);
1438: } else {
1439: my $tryserver;
1440: my %allusers=();
1441: foreach $tryserver (keys %libserv) {
1442: if ($hostdom{$tryserver} eq $udom) {
1443: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1444: $tryserver);
1445: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1446: && ($listing ne 'con_lost')) {
1447: map {
1448: my ($entry,@stat)=split(/&/,$_);
1449: $allusers{$entry}=1;
1450: } split(/:/,$listing);
1451: }
1452: }
1453: }
1454: my $alluserstr='';
1455: map {
1456: $alluserstr.=$_.'&user:';
1457: } sort keys %allusers;
1458: $alluserstr=~s/:$//;
1459: return split(/:/,$alluserstr);
1460: }
1461: } else {
1462: my $tryserver;
1463: my %alldom=();
1464: foreach $tryserver (keys %libserv) {
1465: $alldom{$hostdom{$tryserver}}=1;
1466: }
1467: my $alldomstr='';
1468: map {
1469: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1470: } sort keys %alldom;
1471: $alldomstr=~s/:$//;
1472: return split(/:/,$alldomstr);
1473: }
1.26 www 1474: }
1475:
1476: # -------------------------------------------------------- Value of a Condition
1477:
1.40 www 1478: sub directcondval {
1479: my $number=shift;
1480: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1481: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1482: } else {
1483: return 2;
1484: }
1485: }
1486:
1.26 www 1487: sub condval {
1488: my $condidx=shift;
1489: my $result=0;
1.54 www 1490: my $allpathcond='';
1491: map {
1492: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1493: $allpathcond.=
1494: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1495: }
1496: } split(/\|/,$condidx);
1497: $allpathcond=~s/\|$//;
1.33 www 1498: if ($ENV{'request.course.id'}) {
1.54 www 1499: if ($allpathcond) {
1.26 www 1500: my $operand='|';
1501: my @stack;
1502: map {
1503: if ($_ eq '(') {
1504: push @stack,($operand,$result)
1505: } elsif ($_ eq ')') {
1506: my $before=pop @stack;
1507: if (pop @stack eq '&') {
1508: $result=$result>$before?$before:$result;
1509: } else {
1510: $result=$result>$before?$result:$before;
1511: }
1512: } elsif (($_ eq '&') || ($_ eq '|')) {
1513: $operand=$_;
1514: } else {
1.40 www 1515: my $new=directcondval($_);
1.26 www 1516: if ($operand eq '&') {
1517: $result=$result>$new?$new:$result;
1518: } else {
1519: $result=$result>$new?$result:$new;
1520: }
1521: }
1.54 www 1522: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1.26 www 1523: }
1524: }
1525: return $result;
1.28 www 1526: }
1527:
1528: # --------------------------------------------------------- Value of a Variable
1529:
1.58 www 1530: sub EXT {
1.102 www 1531: my $varname=shift;
1.68 www 1532: unless ($varname) { return ''; }
1.48 www 1533: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1534: my $rest;
1535: if ($therest[0]) {
1536: $rest=join('.',@therest);
1537: } else {
1538: $rest='';
1539: }
1.57 www 1540: my $qualifierrest=$qualifier;
1541: if ($rest) { $qualifierrest.='.'.$rest; }
1542: my $spacequalifierrest=$space;
1543: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 1544: if ($realm eq 'user') {
1.48 www 1545: # --------------------------------------------------------------- user.resource
1546: if ($space eq 'resource') {
1.57 www 1547: my %restored=&restore;
1548: return $restored{$qualifierrest};
1.48 www 1549: # ----------------------------------------------------------------- user.access
1550: } elsif ($space eq 'access') {
1551: return &allowed($qualifier,$rest);
1552: # ------------------------------------------ user.preferences, user.environment
1553: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.57 www 1554: return $ENV{join('.',('environment',$qualifierrest))};
1.48 www 1555: # ----------------------------------------------------------------- user.course
1556: } elsif ($space eq 'course') {
1557: return $ENV{join('.',('request.course',$qualifier))};
1558: # ------------------------------------------------------------------- user.role
1559: } elsif ($space eq 'role') {
1560: my ($role,$where)=split(/\./,$ENV{'request.role'});
1561: if ($qualifier eq 'value') {
1562: return $role;
1563: } elsif ($qualifier eq 'extent') {
1564: return $where;
1565: }
1566: # ----------------------------------------------------------------- user.domain
1567: } elsif ($space eq 'domain') {
1568: return $ENV{'user.domain'};
1569: # ------------------------------------------------------------------- user.name
1570: } elsif ($space eq 'name') {
1571: return $ENV{'user.name'};
1572: # ---------------------------------------------------- Any other user namespace
1.29 www 1573: } else {
1.48 www 1574: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1575: my %reply=&get($space,$item);
1576: return $reply{$item};
1577: }
1578: } elsif ($realm eq 'request') {
1579: # ------------------------------------------------------------- request.browser
1580: if ($space eq 'browser') {
1581: return $ENV{'browser.'.$qualifier};
1.57 www 1582: # ------------------------------------------------------------ request.filename
1583: } else {
1584: return $ENV{'request.'.$spacequalifierrest};
1.29 www 1585: }
1.28 www 1586: } elsif ($realm eq 'course') {
1.48 www 1587: # ---------------------------------------------------------- course.description
1.57 www 1588: my $section='';
1589: if ($ENV{'request.course.sec'}) {
1590: $section='_'.$ENV{'request.course.sec'};
1.48 www 1591: }
1.57 www 1592: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1593: $spacequalifierrest};
1594: } elsif ($realm eq 'resource') {
1.60 www 1595: if ($ENV{'request.course.id'}) {
1596: # ----------------------------------------------------- Cascading lookup scheme
1.102 www 1597: my $symbp=&symbread();
1.69 www 1598: my $mapp=(split(/\_\_\_/,$symbp))[0];
1599:
1600: my $symbparm=$symbp.'.'.$spacequalifierrest;
1601: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1602:
1.60 www 1603: my $seclevel=
1.69 www 1604: $ENV{'request.course.id'}.'.['.
1605: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1606: my $seclevelr=
1607: $ENV{'request.course.id'}.'.['.
1608: $ENV{'request.course.sec'}.'].'.$symbparm;
1609: my $seclevelm=
1610: $ENV{'request.course.id'}.'.['.
1611: $ENV{'request.course.sec'}.'].'.$mapparm;
1612:
1.60 www 1613: my $courselevel=
1614: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1.69 www 1615: my $courselevelr=
1616: $ENV{'request.course.id'}.'.'.$symbparm;
1617: my $courselevelm=
1618: $ENV{'request.course.id'}.'.'.$mapparm;
1619:
1.60 www 1620: # ----------------------------------------------------------- first, check user
1.69 www 1621: my %resourcedata=get('resourcedata',
1622: ($courselevelr,$courselevelm,$courselevel));
1.94 www 1623: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1624: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1.69 www 1625:
1626: if ($resourcedata{$courselevelr}) {
1627: return $resourcedata{$courselevelr}; }
1628: if ($resourcedata{$courselevelm}) {
1629: return $resourcedata{$courselevelm}; }
1.60 www 1630: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1.69 www 1631:
1.94 www 1632: } else {
1633: if ($resourcedata{$courselevelr}!~/No such file/) {
1634: &logthis("<font color=blue>WARNING:".
1635: " Trying to get resource data for ".$ENV{'user.name'}." at "
1636: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1637: "</font>");
1638: }
1.63 www 1639: }
1.95 www 1640:
1.60 www 1641: # -------------------------------------------------------- second, check course
1.96 www 1642:
1.60 www 1643: my $reply=&reply('get:'.
1.96 www 1644: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1645: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1.79 www 1646: ':resourcedata:'.
1647: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1648: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1.96 www 1649: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1.63 www 1650: if ($reply!~/^error\:/) {
1.79 www 1651: map {
1652: if ($_) { return &unescape($_); }
1653: } split(/\&/,$reply);
1.63 www 1654: }
1.94 www 1655: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1656: &logthis("<font color=blue>WARNING:".
1.95 www 1657: " Getting ".$reply." asking for ".$varname." for ".
1.96 www 1658: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1.95 www 1659: ' at '.
1.96 www 1660: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1.95 www 1661: ' from '.
1.96 www 1662: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1.94 www 1663: "</font>");
1664: }
1.60 www 1665: # ------------------------------------------------------ third, check map parms
1.65 www 1666: my %parmhash=();
1667: my $thisparm='';
1668: if (tie(%parmhash,'GDBM_File',
1669: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1670: $thisparm=$parmhash{$symbparm};
1671: untie(%parmhash);
1.60 www 1672: }
1.65 www 1673: if ($thisparm) { return $thisparm; }
1.60 www 1674: }
1675:
1676: # --------------------------------------------- last, look in resource metadata
1.71 www 1677:
1.78 www 1678: $spacequalifierrest=~s/\./\_/;
1.71 www 1679: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1680: if ($metadata) { return $metadata; }
1.78 www 1681: $metadata=&metadata($ENV{'request.filename'},
1682: 'parameter_'.$spacequalifierrest);
1683: if ($metadata) { return $metadata; }
1.71 www 1684:
1.48 www 1685: # ---------------------------------------------------- Any other user namespace
1686: } elsif ($realm eq 'environment') {
1687: # ----------------------------------------------------------------- environment
1.57 www 1688: return $ENV{$spacequalifierrest};
1.28 www 1689: } elsif ($realm eq 'system') {
1.48 www 1690: # ----------------------------------------------------------------- system.time
1691: if ($space eq 'time') {
1692: return time;
1693: }
1.28 www 1694: }
1.48 www 1695: return '';
1.61 www 1696: }
1697:
1.71 www 1698: # ---------------------------------------------------------------- Get metadata
1699:
1700: sub metadata {
1701: my ($uri,$what)=@_;
1.78 www 1702:
1.71 www 1703: $uri=&declutter($uri);
1.73 www 1704: my $filename=$uri;
1705: $uri=~s/\.meta$//;
1.71 www 1706: unless ($metacache{$uri.':keys'}) {
1.73 www 1707: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1708: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1.71 www 1709: my $parser=HTML::TokeParser->new(\$metastring);
1710: my $token;
1711: while ($token=$parser->get_token) {
1712: if ($token->[0] eq 'S') {
1713: my $entry=$token->[1];
1714: my $unikey=$entry;
1.72 www 1715: if (defined($token->[2]->{'part'})) {
1.71 www 1716: $unikey.='_'.$token->[2]->{'part'};
1717: }
1.72 www 1718: if (defined($token->[2]->{'name'})) {
1.71 www 1719: $unikey.='_'.$token->[2]->{'name'};
1720: }
1721: if ($metacache{$uri.':keys'}) {
1722: $metacache{$uri.':keys'}.=','.$unikey;
1723: } else {
1724: $metacache{$uri.':keys'}=$unikey;
1725: }
1726: map {
1727: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1.72 www 1728: } @{$token->[3]};
1.78 www 1729: unless (
1730: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1731: ) { $metacache{$uri.':'.$unikey}=
1732: $metacache{$uri.':'.$unikey.'.default'};
1733: }
1.71 www 1734: }
1735: }
1736: }
1737: return $metacache{$uri.':'.$what};
1738: }
1739:
1.31 www 1740: # ------------------------------------------------- Update symbolic store links
1741:
1742: sub symblist {
1743: my ($mapname,%newhash)=@_;
1744: $mapname=declutter($mapname);
1745: my %hash;
1746: if (($ENV{'request.course.fn'}) && (%newhash)) {
1747: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1748: &GDBM_WRCREAT,0640)) {
1749: map {
1750: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1751: } keys %newhash;
1752: if (untie(%hash)) {
1753: return 'ok';
1754: }
1755: }
1756: }
1757: return 'error';
1758: }
1759:
1760: # ------------------------------------------------------ Return symb list entry
1761:
1762: sub symbread {
1.44 www 1763: my $thisfn=shift;
1764: unless ($thisfn) {
1765: $thisfn=$ENV{'request.filename'};
1766: }
1767: $thisfn=declutter($thisfn);
1.31 www 1768: my %hash;
1.37 www 1769: my %bighash;
1770: my $syval='';
1.45 www 1771: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.31 www 1772: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1773: &GDBM_READER,0640)) {
1774: $syval=$hash{$thisfn};
1.37 www 1775: untie(%hash);
1776: }
1777: # ---------------------------------------------------------- There was an entry
1778: if ($syval) {
1779: unless ($syval=~/\_\d+$/) {
1780: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 1781: &appenv('request.ambiguous' => $thisfn);
1.37 www 1782: return '';
1783: }
1784: $syval.=$1;
1785: }
1786: } else {
1787: # ------------------------------------------------------- Was not in symb table
1788: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1789: &GDBM_READER,0640)) {
1790: # ---------------------------------------------- Get ID(s) for current resource
1791: my $ids=$bighash{'ids_/res/'.$thisfn};
1.65 www 1792: unless ($ids) {
1793: $ids=$bighash{'ids_/'.$thisfn};
1794: }
1.37 www 1795: if ($ids) {
1796: # ------------------------------------------------------------------- Has ID(s)
1797: my @possibilities=split(/\,/,$ids);
1.39 www 1798: if ($#possibilities==0) {
1799: # ----------------------------------------------- There is only one possibility
1.37 www 1800: my ($mapid,$resid)=split(/\./,$ids);
1801: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1802: } else {
1.39 www 1803: # ------------------------------------------ There is more than one possibility
1804: my $realpossible=0;
1805: map {
1806: my $file=$bighash{'src_'.$_};
1807: if (&allowed('bre',$file)) {
1808: my ($mapid,$resid)=split(/\./,$_);
1809: if ($bighash{'map_type_'.$mapid} ne 'page') {
1810: $realpossible++;
1811: $syval=declutter($bighash{'map_id_'.$mapid}).
1812: '___'.$resid;
1813: }
1814: }
1815: } @possibilities;
1816: if ($realpossible!=1) { $syval=''; }
1.37 www 1817: }
1818: }
1819: untie(%bighash)
1820: }
1.31 www 1821: }
1.62 www 1822: if ($syval) {
1823: return $syval.'___'.$thisfn;
1824: }
1.31 www 1825: }
1.44 www 1826: &appenv('request.ambiguous' => $thisfn);
1.31 www 1827: return '';
1828: }
1829:
1830: # ---------------------------------------------------------- Return random seed
1831:
1.32 www 1832: sub numval {
1833: my $txt=shift;
1834: $txt=~tr/A-J/0-9/;
1835: $txt=~tr/a-j/0-9/;
1836: $txt=~tr/K-T/0-9/;
1837: $txt=~tr/k-t/0-9/;
1838: $txt=~tr/U-Z/0-5/;
1839: $txt=~tr/u-z/0-5/;
1840: $txt=~s/\D//g;
1841: return int($txt);
1842: }
1843:
1.31 www 1844: sub rndseed {
1845: my $symb;
1.44 www 1846: unless ($symb=&symbread()) { return time; }
1.98 albertel 1847: {
1848: use integer;
1849: my $symbchck=unpack("%32C*",$symb) << 27;
1.100 albertel 1850: my $symbseed=numval($symb) << 22;
1.98 albertel 1851: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1.100 albertel 1852: my $nameseed=numval($ENV{'user.name'}) << 12;
1.98 albertel 1853: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1854: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1855: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1.99 albertel 1856: #uncommenting these lines can break things!
1857: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1858: #&Apache::lonxml::debug("rndseed :$num:$symb");
1.98 albertel 1859: return $num;
1860: }
1.36 albertel 1861: }
1862:
1.76 www 1863: sub ireceipt {
1864: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1865: my $cuname=unpack("%32C*",$funame);
1866: my $cudom=unpack("%32C*",$fudom);
1867: my $cucourseid=unpack("%32C*",$fucourseid);
1868: my $cusymb=unpack("%32C*",$fusymb);
1.77 www 1869: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1.76 www 1870: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1871: ($cunique%$cuname+
1872: $cunique%$cudom+
1873: $cusymb%$cuname+
1874: $cusymb%$cudom+
1875: $cucourseid%$cuname+
1876: $cucourseid%$cudom);
1877: }
1878:
1879: sub receipt {
1880: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1881: $ENV{'request.course.id'},&symbread());
1882: }
1883:
1.36 albertel 1884: # ------------------------------------------------------------ Serves up a file
1885: # returns either the contents of the file or a -1
1886: sub getfile {
1887: my $file=shift;
1.37 www 1888: &repcopy($file);
1.36 albertel 1889: if (! -e $file ) { return -1; };
1890: my $fh=Apache::File->new($file);
1891: my $a='';
1892: while (<$fh>) { $a .=$_; }
1893: return $a
1894: }
1895:
1896: sub filelocation {
1897: my ($dir,$file) = @_;
1898: my $location;
1899: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 1900: if ($file=~m:^/~:) { # is a contruction space reference
1901: $location = $file;
1902: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.36 albertel 1903: } else {
1.59 albertel 1904: $file=~s/^$perlvar{'lonDocRoot'}//;
1905: $file=~s:^/*res::;
1906: if ( !( $file =~ m:^/:) ) {
1907: $location = $dir. '/'.$file;
1908: } else {
1909: $location = '/home/httpd/html/res'.$file;
1910: }
1.36 albertel 1911: }
1912: $location=~s://+:/:g; # remove duplicate /
1.46 www 1913: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1914: return $location;
1915: }
1.36 albertel 1916:
1.46 www 1917: sub hreflocation {
1918: my ($dir,$file)=@_;
1919: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1920: my $finalpath=filelocation($dir,$file);
1921: $finalpath=~s/^\/home\/httpd\/html//;
1922: return $finalpath;
1923: } else {
1924: return $file;
1925: }
1.31 www 1926: }
1927:
1928: # ------------------------------------------------------------- Declutters URLs
1929:
1930: sub declutter {
1931: my $thisfn=shift;
1932: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1933: $thisfn=~s/^\///;
1934: $thisfn=~s/^res\///;
1935: return $thisfn;
1.12 www 1936: }
1937:
1938: # -------------------------------------------------------- Escape Special Chars
1939:
1940: sub escape {
1941: my $str=shift;
1942: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1943: return $str;
1944: }
1945:
1946: # ----------------------------------------------------- Un-Escape Special Chars
1947:
1948: sub unescape {
1949: my $str=shift;
1950: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1951: return $str;
1952: }
1.11 www 1953:
1.1 albertel 1954: # ================================================================ Main Program
1955:
1956: sub BEGIN {
1957: if ($readit ne 'done') {
1958: # ------------------------------------------------------------ Read access.conf
1959: {
1960: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
1961:
1962: while (my $configline=<$config>) {
1963: if ($configline =~ /PerlSetVar/) {
1964: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 1965: chomp($varvalue);
1.1 albertel 1966: $perlvar{$varname}=$varvalue;
1967: }
1968: }
1969: }
1970:
1971: # ------------------------------------------------------------- Read hosts file
1972: {
1973: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
1974:
1975: while (my $configline=<$config>) {
1976: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1977: $hostname{$id}=$name;
1978: $hostdom{$id}=$domain;
1979: if ($role eq 'library') { $libserv{$id}=$name; }
1980: }
1981: }
1982:
1983: # ------------------------------------------------------ Read spare server file
1984: {
1985: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
1986:
1987: while (my $configline=<$config>) {
1988: chomp($configline);
1989: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
1990: $spareid{$configline}=1;
1991: }
1992: }
1993: }
1.11 www 1994: # ------------------------------------------------------------ Read permissions
1995: {
1996: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
1997:
1998: while (my $configline=<$config>) {
1999: chomp($configline);
2000: my ($role,$perm)=split(/ /,$configline);
2001: if ($perm ne '') { $pr{$role}=$perm; }
2002: }
2003: }
2004:
2005: # -------------------------------------------- Read plain texts for permissions
2006: {
2007: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2008:
2009: while (my $configline=<$config>) {
2010: chomp($configline);
2011: my ($short,$plain)=split(/:/,$configline);
2012: if ($plain ne '') { $prp{$short}=$plain; }
1.25 www 2013: }
2014: }
2015:
2016: # ------------------------------------------------------------- Read file types
2017: {
2018: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2019:
2020: while (my $configline=<$config>) {
2021: chomp($configline);
2022: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2023: if ($descr[0] ne '') {
2024: $fe{$ending}=$emb;
2025: $fd{$ending}=join(' ',@descr);
2026: }
1.11 www 2027: }
2028: }
2029:
1.71 www 2030: %metacache=();
1.22 www 2031:
1.1 albertel 2032: $readit='done';
1.12 www 2033: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.1 albertel 2034: }
2035: }
2036: 1;
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