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