--- loncom/xml/londefdef.pm	2013/09/22 15:35:45	1.446
+++ loncom/xml/londefdef.pm	2014/08/24 23:38:30	1.453
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.446 2013/09/22 15:35:45 raeburn Exp $
+# $Id: londefdef.pm,v 1.453 2014/08/24 23:38:30 raeburn Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -585,14 +585,18 @@ sub start_body {
         # FIXME Where are we?
     }
 
+        my $args = {'add_entries'    => $token->[2],
+                    'force_register' => 1,};
+        if ($target eq 'web') {
+            $args->{'print_suppress'} = 1;
+            if ($env{'request.use_absolute'}) {
+                $args->{'use_absolute'} = $env{'request.use_absolute'};
+            }
+        }
 	$currentstring = 
 	    &Apache::loncommon::start_page($Apache::londefdef::title,
 					   $Apache::londefdef::head
-					      .$extra_head,
-					   {'add_entries'    => $token->[2],
-#					    'no_title'       => 1,
-					    'force_register' => 1});
-
+					      .$extra_head,$args);
         my $header = '';
         if ($env{'request.state'} ne 'published' &&
             $env{'request.state'} ne 'construct') {
@@ -1728,6 +1732,15 @@ sub start_a {
                     if (!&Apache::lonnet::allowed('bre',$linkurl)) {
                         if (&Apache::lonnet::is_on_map($url)) {
                             &Apache::lonxml::extlink($linkurl);
+                        } elsif ($env{'request.course.id'}) {
+                            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                            if ($linkurl =~ m{^([^/]|/uploaded/$cdom/$cnum/docs/)}) {
+                                my $cleanhref = &clean_docs_httpref($linkurl,$url,$cdom,$cnum);
+                                if ($cleanhref) {
+                                    &Apache::lonxml::extlink($cleanhref);
+                                }
+                            }
                         }
                     }
                 }
@@ -2740,7 +2753,9 @@ sub start_img {
 	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
 	return '';
     }
-    &Apache::lonxml::extlink($src);
+    unless ($src =~ m{^data\:image/gif;base64,}) {
+        &Apache::lonxml::extlink($src);
+    }
     my $currentstring = '';
     my $scaling = .3;
 
@@ -2750,8 +2765,10 @@ sub start_img {
         my $enc = ('yes' eq 
                    lc(&Apache::lonxml::get_param('encrypturl',$parstack,
                       $safeeval)));
-        $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
-                         $enc);
+        unless ($src =~ m{^data\:image/gif;base64,}) {
+            $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
+                            $enc);
+        }
 
     # and render unto TeX that which is LaTeX
     } elsif ($target eq 'tex') {
@@ -3606,11 +3623,32 @@ sub start_iframe {
                         }
                     }
                     $currentstring =~ s/\s+$//;
-                    $currentstring .= '>';
+                    if ($token->[4] =~ m{/>$}) {
+                        $currentstring .= ' />';
+                    } else {
+                        $currentstring .= '>';
+                    }
                 } else {
                     $currentstring = $token->[4];
                 }
             }
+            if (($url !~ m{^https?://}) && ($env{'request.course.id'})) {
+                my $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                if ($url =~ m{^([^/]|/uploaded/)}) {
+                    my $cleanhref = &clean_docs_httpref($url,$docuri,$cdom,$cnum);
+                    if ($cleanhref) {
+                        &Apache::lonxml::extlink($cleanhref);
+                    }
+                } elsif (($url =~ m{/res/$LONCAPA::domain_re/}) && ($docuri =~ m{^\Q/uploaded/$cdom/$cnum/docs/\E})) {
+                    if (!&Apache::lonnet::allowed('bre',$url)) {
+                        if (&Apache::lonnet::is_on_map($url)) {
+                            &Apache::lonxml::extlink($url);
+                        }
+                    }
+                }
+            }
         } else {
             $currentstring = $token->[4];
         }
@@ -4562,6 +4600,62 @@ sub latex_header {
 
 }
 
+sub clean_docs_httpref {
+    my ($href,$docuri,$cdom,$cnum) = @_;
+    if ($docuri eq '') {
+        $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+    }
+    if ($cdom eq '') {
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    }
+    if ($cnum eq '') {
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    }
+    my $cleanhref;
+    if ($docuri =~ m{^(\Q/uploaded/$cdom/$cnum/docs/\E)(.+/)[^/]+$}) {
+        my $prefix = $1;
+        my $relpath = $2;
+        my ($hrefpath,$fname);
+        if ($href =~ m{^/}) {
+            if ($href =~ m{^\Q$prefix\E(.+/)([^/]+)$}) {
+                $hrefpath = $1;
+                $fname = $2;
+            } else {
+                return $cleanhref;
+            }
+        } else {
+            if ($href =~ m{/}) {  
+                (my $path,$fname) = ($href =~ m{^(.*)/([^/]*)$});
+                $hrefpath = $relpath.$path;
+                if ($path eq '') {
+                    $hrefpath =~ s{/$}{};
+                }
+            } else {
+                $fname = $href;
+                $hrefpath = $relpath;
+                $hrefpath =~ s{/$}{};
+            }
+        }
+        if ($fname ne '') {
+            my $cleanrelpath;
+            foreach my $dir (split(/\//,$hrefpath)) {
+                next if ($dir eq '.');
+                if ($dir eq '..') {
+                    $cleanrelpath =~ s{([^/]+/)$}{};
+                } else {
+                    $cleanrelpath .= $dir.'/';
+                }
+            }
+            if ($cleanrelpath ne '') {
+                $cleanhref = $prefix.$cleanrelpath.$fname;
+            } else {
+                $cleanhref = $prefix.$fname;
+            }
+        }
+    }
+    return $cleanhref;
+}
+
 =pod
 
 =head1 NAME
@@ -4656,7 +4750,22 @@ described at http://www.lon-capa.org.
      	   I'm in a table....
      	}
 
-
+=item clean_docs_httpref($href,$docuri,$cdom,$cnum)
+        HTML pages uploaded to a course which contain dependencies either from iframes,
+        javascript files or objects (FlashPlayerSwf, MediaSrc, XMPSrc, ConfigurationSrc,
+        and PosterImageSrc) for which dependency is another file uploaded to the same
+        course.
+
+        Required input: 
+        href - dependency (either a relative URL, or an absolute URL)
+        Optional inputs:
+        docuri - URL of HTML page containing the dependency
+        cdom - Course domain
+        cnum - CourseID
+
+        Output:
+        returns an absolute URL constructed from the href provided, and the calling context.
+        (this will be null, if the URL does not begin: /uploaded/$cdom/$cnum/docs/).
 
 =back