diff --git a/FHEM/02_HTTPSRV.pm b/FHEM/02_HTTPSRV.pm
index d76a4dcf2..2946e6a12 100644
--- a/FHEM/02_HTTPSRV.pm
+++ b/FHEM/02_HTTPSRV.pm
@@ -15,23 +15,37 @@ use HttpUtils;
 
 #########################
 sub
-HTTPSRV_addExtension($$$) {
-    my ($func,$link,$friendlyname)= @_;
+HTTPSRV_addExtension($$$$) {
+    my ($name,$func,$link,$friendlyname)= @_;
   
-    my $url = "/" . $link;
+    my $url = "/$link";
+    Log 3, "Registering HTTPSRV $name for URL $url...";
+    $data{FWEXT}{$url}{deviceName}= $name;
     $data{FWEXT}{$url}{FUNC} = $func;
     $data{FWEXT}{$url}{LINK} = $link;
     $data{FWEXT}{$url}{NAME} = $friendlyname;
 }
 
+sub 
+HTTPSRV_removeExtension($) {
+    my ($link)= @_;
+
+    my $url = "/$link";
+    my $name= $data{FWEXT}{$url}{deviceName};
+    Log 3, "Unregistering HTTPSRV $name for URL $url...";
+    delete $data{FWEXT}{$url};
+}
+
 ##################
 sub
 HTTPSRV_Initialize($) {
     my ($hash) = @_;
-    $hash->{DefFn}   = "HTTPSRV_Define";
-    #$hash->{AttrFn}  = "HTTPSRV_Attr";
-    $hash->{AttrList}= "loglevel:0,1,2,3,4,5";
-    #$hash->{SetFn}   = "HTTPSRV_Set";
+    $hash->{DefFn}     = "HTTPSRV_Define";
+    $hash->{DefFn}     = "HTTPSRV_Define";
+    $hash->{UndefFn}   = "HTTPSRV_Undef";
+    #$hash->{AttrFn}    = "HTTPSRV_Attr";
+    $hash->{AttrList}  = "loglevel:0,1,2,3,4,5 directoryindex";
+    #$hash->{SetFn}     = "HTTPSRV_Set";
 
     return undef;
  }
@@ -54,47 +68,71 @@ HTTPSRV_Define($$) {
   $hash->{fhem}{directory}= $directory;
   $hash->{fhem}{friendlyname}= $friendlyname;
 
-  HTTPSRV_addExtension("HTTPSRV_CGI", $infix, $friendlyname);
+  HTTPSRV_addExtension($name, "HTTPSRV_CGI", $infix, $friendlyname);
   
   $hash->{STATE} = $name;
   return undef;
 }
 
+##################
+sub
+HTTPSRV_Undef($$) {
+
+  my ($hash, $name) = @_;
+
+  HTTPSRV_removeExtension($hash->{fhem}{infix});
+
+  return undef;
+}
+
 ##################
 #
 # here we answer any request to http://host:port/fhem/$infix and below
-sub
-HTTPSRV_CGI(){
+
+sub HTTPSRV_CGI() {
 
   my ($request) = @_;   # /$infix/filename
 
-  if($request !~ m,^/.+/.*,) {
-    $request= "$request/index.html";
-  }
-  if($request =~ m,^/([^/]+)/(.*)$,) {
-    my $name= $1;
-    my $filename= $2;
+  if($request =~ m,^(/[^/]+)(/(.*)?)?$,) {
+    my $link= $1;
+    my $filename= $3;
+    my $name;
+
+    # get device name
+    $name= $data{FWEXT}{$link}{deviceName} if($data{FWEXT}{$link});
+
+    Debug "link= $link";
+    Debug "filename= $filename";
+    Debug "name= $name";
+
+    # return error if no such device
+    return("text/plain; charset=utf-8", "No HTTPSRV device for $link") unless($name);
+
+    # set directory index
+    $filename= AttrVal($name,"directoryindex","index.html") unless($filename);
     my $MIMEtype= filename2MIMEType($filename);
-    #return("text/plain; charset=utf-8", "HTTPSRV device: $name, filename: $filename, MIME type: $MIMEtype");
-    if(!defined($defs{$name})) {
-      return("text/plain; charset=utf-8", "Unknown HTTPSRV device: $name");
-    }
-      my $directory= $defs{$name}{fhem}{directory};
-      $filename= "$directory/$filename";
-      my @contents;
-      if(open(INPUTFILE, $filename)) {
-        binmode(INPUTFILE);
-        @contents= <INPUTFILE>;
-        close(INPUTFILE);
-        return("$MIMEtype; charset=utf-8", join("", @contents));
-      } else {
-        return("text/plain; charset=utf-8", "File not found: $filename");
+
+    my $directory= $defs{$name}{fhem}{directory};
+    $filename= "$directory/$filename";
+    my @contents;
+    if(open(INPUTFILE, $filename)) {
+      binmode(INPUTFILE);
+      @contents= <INPUTFILE>;
+      close(INPUTFILE);
+      return("$MIMEtype; charset=utf-8", join("", @contents));
+    } else {
+      return("text/plain; charset=utf-8", "File not found: $filename");
     }
+
   } else {
     return("text/plain; charset=utf-8", "Illegal request: $request");
   }
 
-}
+    
+}   
+    
+   
+
 
 ####
 
diff --git a/docs/commandref.html b/docs/commandref.html
index f0d46b058..808a77029 100644
--- a/docs/commandref.html
+++ b/docs/commandref.html
@@ -5371,7 +5371,7 @@ To send the data, both send or write could be used.<br>
   <b>Attributes</b>
   <br><br>
   <ul>
-    n/a
+    <li>directoryindex: if the request is sent with no filename, i.e. the infix (with or without trailing slash) only, the file given in this attribute is loaded. Defaults to <code>index.html</code>.</li>
   </ul>
   <br><br>
 
@@ -5381,7 +5381,7 @@ To send the data, both send or write could be used.<br>
 
   The above example on <code>http://hostname:8083/fhem</code> will return the file
   <code>/usr/share/jsfrontend/foo.html</code> for <code>http://hostname:8083/fhem/jsf/foo.html</code>.
-  If no filename is given, <code>index.html</code> is returned.<p>
+  If no filename is given, the filename prescribed by the <code>directoryindex</code> attribute is returned.<p>
 
   Notice: All links are relative to <code>http://hostname:8083/fhem</code>.
   </ul>