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