--- loncom/lonnet/perl/lonnet.pm	2010/12/24 21:59:08	1.1056.4.15
+++ loncom/lonnet/perl/lonnet.pm	2011/05/14 17:16:49	1.1056.4.25
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1056.4.15 2010/12/24 21:59:08 raeburn Exp $
+# $Id: lonnet.pm,v 1.1056.4.25 2011/05/14 17:16:49 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -196,6 +196,29 @@ sub get_server_timezone {
     }
 }
 
+sub get_server_distarch {
+    my ($lonhost,$ignore_cache) = @_;
+    if (defined($lonhost)) {
+        if (!defined(&hostname($lonhost))) {
+            return;
+        }
+        my $cachetime = 12*3600;
+        if (!$ignore_cache) {
+            my ($distarch,$cached)=&is_cached_new('serverdistarch',$lonhost);
+            if (defined($cached)) {
+                return $distarch;
+            }
+        }
+        my $rep = &reply('serverdistarch',$lonhost);
+        unless ($rep eq 'unknown_command' || $rep eq 'no_such_host' ||
+                $rep eq 'con_lost' || $rep eq 'rejected' || $rep eq 'refused' ||
+                $rep eq '') {
+            return &do_cache_new('serverdistarch',$lonhost,$rep,$cachetime);
+        }
+    }
+    return;
+}
+
 sub get_server_loncaparev {
     my ($dom,$lonhost,$ignore_cache,$caller) = @_;
     if (defined($lonhost)) {
@@ -752,22 +775,22 @@ sub overloaderror {
 # ------------------------------ Find server with least workload from spare.tab
 
 sub spareserver {
-    my ($loadpercent,$userloadpercent,$want_server_name) = @_;
+    my ($loadpercent,$userloadpercent,$want_server_name,$udom) = @_;
     my $spare_server;
     if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
     my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent 
                                                      :  $userloadpercent;
     my ($uint_dom,$remotesessions);
-    if ($env{'user.domain'}) {
-        my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
+    if (($udom ne '') && (&domain($udom) ne '')) {
+        my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
         $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
-        my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
+        my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
         $remotesessions = $udomdefaults{'remotesessions'};
     }
     foreach my $try_server (@{ $spareid{'primary'} }) {
         if ($uint_dom) {
-            next unless (&spare_can_host($env{'user.domain'},$uint_dom,
-                                         $remotesessions,$try_server));
+            next unless (&spare_can_host($udom,$uint_dom,$remotesessions,
+                                         $try_server));
         }
 	($spare_server, $lowest_load) =
 	    &compare_server_load($try_server, $spare_server, $lowest_load);
@@ -778,8 +801,8 @@ sub spareserver {
     if (!$found_server) {
 	foreach my $try_server (@{ $spareid{'default'} }) {
             if ($uint_dom) {
-                next unless (&spare_can_host($env{'user.domain'},$uint_dom,
-                                             $remotesessions,$try_server));
+                next unless (&spare_can_host($udom,$uint_dom,$remotesessions,
+                                             $try_server));
             }
 	    ($spare_server, $lowest_load) =
 		&compare_server_load($try_server, $spare_server, $lowest_load);
@@ -2200,6 +2223,8 @@ sub allowuploaded {
 #        path to file, source of file, instruction to parse file for objects,
 #        ref to hash for embedded objects,
 #        ref to hash for codebase of java objects.
+#        reference to scalar to accommodate mime type determined
+#          from File::MMagic if $parser = parse.
 #
 # output: url to file (if action was uploaddoc), 
 #         ok if successful, or diagnostic message otherwise (if action was propagate or copy)
@@ -2226,7 +2251,8 @@ sub allowuploaded {
 #
 
 sub process_coursefile {
-    my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
+    my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase,
+        $mimetype)=@_;
     my $fetchresult;
     my $home=&homeserver($docuname,$docudom);
     if ($action eq 'propagate') {
@@ -2254,13 +2280,16 @@ sub process_coursefile {
             close($fh);
             if ($parser eq 'parse') {
                 my $mm = new File::MMagic;
-                my $mime_type = $mm->checktype_filename($filepath.'/'.$fname);
-                if ($mime_type eq 'text/html') {
+                my $type = $mm->checktype_filename($filepath.'/'.$fname);
+                if ($type eq 'text/html') {
                     my $parse_result = &extract_embedded_items($filepath.'/'.$fname,$allfiles,$codebase);
                     unless ($parse_result eq 'ok') {
                         &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
                     }
                 }
+                if (ref($mimetype)) {
+                    $$mimetype = $type;
+                }
             }
             $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
                                  $home);
@@ -2393,13 +2422,15 @@ sub resizeImage {
 #        $thumbheight - height (pixels) of thumbnail to make for uploaded image
 #        $resizewidth - width (pixels) to which to resize uploaded image
 #        $resizeheight - height (pixels) to which to resize uploaded image
+#        $mimetype - reference to scalar to accommodate mime type determined
+#                    from File::MMagic if $parser = parse.
 # 
 # output: url of file in userspace, or error: <message> 
 #             or /adm/notfound.html if failure to upload occurse
 
 sub userfileupload {
     my ($formname,$context,$subdir,$parser,$allfiles,$codebase,$destuname,
-        $destudom,$thumbwidth,$thumbheight,$resizewidth,$resizeheight)=@_;
+        $destudom,$thumbwidth,$thumbheight,$resizewidth,$resizeheight,$mimetype)=@_;
     if (!defined($subdir)) { $subdir='unknown'; }
     my $fname=$env{'form.'.$formname.'.filename'};
     $fname=&clean_filename($fname);
@@ -2475,12 +2506,12 @@ sub userfileupload {
             return &finishuserfileupload($docuname,$docudom,
 					 $formname,$fname,$parser,$allfiles,
 					 $codebase,$thumbwidth,$thumbheight,
-                                         $resizewidth,$resizeheight,$context);
+                                         $resizewidth,$resizeheight,$context,$mimetype);
         } else {
             $fname=$env{'form.folder'}.'/'.$fname;
             return &process_coursefile('uploaddoc',$docuname,$docudom,
 				       $fname,$formname,$parser,
-				       $allfiles,$codebase);
+				       $allfiles,$codebase,$mimetype);
         }
     } elsif (defined($destuname)) {
         my $docuname=$destuname;
@@ -2488,7 +2519,7 @@ sub userfileupload {
 	return &finishuserfileupload($docuname,$docudom,$formname,$fname,
 				     $parser,$allfiles,$codebase,
                                      $thumbwidth,$thumbheight,
-                                     $resizewidth,$resizeheight,$context);
+                                     $resizewidth,$resizeheight,$context,$mimetype);
     } else {
         my $docuname=$env{'user.name'};
         my $docudom=$env{'user.domain'};
@@ -2499,13 +2530,13 @@ sub userfileupload {
 	return &finishuserfileupload($docuname,$docudom,$formname,$fname,
 				     $parser,$allfiles,$codebase,
                                      $thumbwidth,$thumbheight,
-                                     $resizewidth,$resizeheight,$context);
+                                     $resizewidth,$resizeheight,$context,$mimetype);
     }
 }
 
 sub finishuserfileupload {
     my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase,
-        $thumbwidth,$thumbheight,$resizewidth,$resizeheight,$context) = @_;
+        $thumbwidth,$thumbheight,$resizewidth,$resizeheight,$context,$mimetype) = @_;
     my $path=$docudom.'/'.$docuname.'/';
     my $filepath=$perlvar{'lonDocRoot'};
   
@@ -2563,8 +2594,8 @@ sub finishuserfileupload {
     }
     if ($parser eq 'parse') {
         my $mm = new File::MMagic;
-        my $mime_type = $mm->checktype_filename($filepath.'/'.$file);
-        if ($mime_type eq 'text/html') {
+        my $type = $mm->checktype_filename($filepath.'/'.$file);
+        if ($type eq 'text/html') {
             my $parse_result = &extract_embedded_items($filepath.'/'.$file,
                                                        $allfiles,$codebase);
             unless ($parse_result eq 'ok') {
@@ -2572,6 +2603,9 @@ sub finishuserfileupload {
 	   	         ' for embedded media: '.$parse_result); 
             }
         }
+        if (ref($mimetype)) {
+            $$mimetype = $type;
+        }
     }
     if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
         my $input = $filepath.'/'.$file;
@@ -5743,7 +5777,7 @@ sub allowed {
        my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
        if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
 	   =~/\Q$rolecode\E/) {
-	   if ($priv ne 'pch') { 
+           if (($priv ne 'pch') && ($priv ne 'plc')) {
 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
 			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
 			$env{'request.course.id'});
@@ -5753,7 +5787,7 @@ sub allowed {
 
        if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
 	   =~/\Q$unamedom\E/) {
-	   if ($priv ne 'pch') { 
+           if (($priv ne 'pch') && ($priv ne 'plc')) {
 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
 			'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
 			$env{'request.course.id'});
@@ -5767,7 +5801,7 @@ sub allowed {
    if ($thisallowed=~/R/) {
        my $rolecode=(split(/\./,$env{'request.role'}))[0];
        if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
-	   if ($priv ne 'pch') { 
+           if (($priv ne 'pch') && ($priv ne 'plc')) {
 	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
 			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
 	   }
@@ -6120,9 +6154,9 @@ sub auto_get_sections {
 }
 
 sub auto_new_course {
-    my ($cnum,$cdom,$inst_course_id,$owner) = @_;
+    my ($cnum,$cdom,$inst_course_id,$owner,$coowners) = @_;
     my $homeserver = &homeserver($cnum,$cdom);
-    my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
+    my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.&escape($owner).':'.$cdom.':'.&escape($coowners),$homeserver));
     return $response;
 }
 
@@ -7339,8 +7373,8 @@ sub store_userdata {
                     $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
                 }
                 $namevalue=~s/\&$//;
-                $result =  &reply("store:$env{'user.domain'}:$env{'user.name'}:".
-                                  "$namespace:$datakey:$namevalue",$uhome);
+                $result =  &reply("store:$udom:$uname:$namespace:$datakey:".
+                                  $namevalue,$uhome);
             }
         } else {
             $result = 'error: data to store was not a hash reference'; 
@@ -7393,7 +7427,7 @@ sub diskusage {
 }
 
 sub is_locked {
-    my ($file_name, $domain, $user) = @_;
+    my ($file_name, $domain, $user, $which) = @_;
     my @check;
     my $is_locked;
     push(@check,$file_name);
@@ -7405,9 +7439,13 @@ sub is_locked {
     if (ref($locked{$file_name}) eq 'ARRAY') {
         $is_locked = 'false';
         foreach my $entry (@{$locked{$file_name}}) {
-           if (ref($entry) eq 'ARRAY') { 
+           if (ref($entry) eq 'ARRAY') {
                $is_locked = 'true';
-               last;
+               if (ref($which) eq 'ARRAY') {
+                   push(@{$which},$entry);
+               } else {
+                   last;
+               }
            }
        }
     } else {
@@ -8563,7 +8601,7 @@ sub metadata {
     if (($uri eq '') || 
 	(($uri =~ m|^/*adm/|) && 
 	     ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
-        ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^\*uploaded\/.+\.sequence$/) ) {
+        ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ m{^/*uploaded/.+\.sequence$}) || ($uri =~ m{^/*uploaded/$match_domain/$match_courseid/docs/})) {
 	return undef;
     }
     if (($uri =~ /^~/ || $uri =~ m{home/$match_username/public_html/}) 
@@ -8953,7 +8991,8 @@ sub symbverify {
         }
         my $ids=$bighash{'ids_'.&clutter($thisurl)};
         unless ($ids) { 
-           $ids=$bighash{'ids_/'.$thisurl};
+           my $idkey = 'ids_'.($thisurl =~ m{^/}? '' : '/').$thisurl;
+           $ids=$bighash{$idkey};
         }
         if ($ids) {
 # ------------------------------------------------------------------- Has ID(s)
@@ -8966,7 +9005,8 @@ sub symbverify {
   &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
    eq $symb) { 
 		   if (($env{'request.role.adv'}) ||
-		       $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
+		       ($bighash{'encrypted_'.$id} eq $env{'request.enc'}) ||
+		       ($thisurl eq '/adm/navmaps')) {
 		       $okay=1; 
 		   }
 	       }
@@ -10045,13 +10085,19 @@ sub get_dns {
     my $loaded;
     my %name_to_host;
     my %internetdom;
+    my %LC_dns_serv;
 
     sub parse_hosts_tab {
 	my ($file) = @_;
 	foreach my $configline (@$file) {
 	    next if ($configline =~ /^(\#|\s*$ )/x);
-	    next if ($configline =~ /^\^/);
-	    chomp($configline);
+            chomp($configline);
+            if ($configline =~ /^\^/) {
+                if ($configline =~ /^\^([\w.\-]+)/) {
+                    $LC_dns_serv{$1} = 1;
+                }
+                next;
+            }
 	    my ($id,$domain,$role,$name,$protocol,$intdom)=split(/:/,$configline);
 	    $name=~s/\s//g;
 	    if ($id && $domain && $role && $name) {
@@ -11489,6 +11535,8 @@ userspace, probably shouldn't be called
   resizeheight: height to be used to resize image using resizeImage from ImageMagick
   context: if 'overwrite', will move the uploaded file from its temporary location to
             userfiles to facilitate overwriting a previously uploaded file with same name.
+  mimetype: reference to scalar to accommodate mime type determined
+            from File::MMagic if $parser = parse.
 
  returns either the url of the uploaded file (/uploaded/....) if successful
  and /adm/notfound.html if unsuccessful (or an error message if context