[BUG #7525] Overwrite path with default path if no listener is regist…

…ered

framework/source/class/qx/application/Routing.js

@@ -124,13 +124,27 @@ qx.Bootstrap.define("qx.application.Routing", {
       }
 
       var path = this.getState();
-      if (path == "" || path == null){
-        path = defaultRoute || qx.application.Routing.DEFAULT_PATH;
-      }
+      path = this._getPathOrFallback(path, defaultRoute);
       this._executeGet(path, null, true);
     },
 
 
+    /**
+     * Checks if path is valid and registered in channel "get" and then just returns it.
+     * If the path is not valid either the <code>defaultPath</code> (if given) or the
+     * {@link #DEFAULT_PATH} will be returned.
+     *
+     * @param path {String} Path which gets checked.
+     * @param defaultPath {String?} Optional default path.
+     */
+    _getPathOrFallback : function(path, defaultPath) {
+      if (path == "" || path == null || !this.__messaging.isListenerRegisteredFor("get", path)) {
+        path = defaultPath || qx.application.Routing.DEFAULT_PATH;
+      }
+      return path;
+    },
+
+
     /**
      * Adds a route handler for the "get" operation. The route gets called
      * when the {@link #executeGet} method found a match.
@@ -232,9 +246,7 @@ qx.Bootstrap.define("qx.application.Routing", {
     __onChangeHash : function(evt)
     {
       var path = evt.getData();
-      if (path == "" || path == null){
-        path = qx.application.Routing.DEFAULT_PATH;
-      }
+      path = this._getPathOrFallback(path);
 
       if (path != this.__currentGetPath) {
         this._executeGet(path, null, true);

framework/source/class/qx/event/Messaging.js

@@ -132,6 +132,31 @@ qx.Bootstrap.define("qx.event.Messaging",
     },
 
 
+    /**
+     * Checks if a listener is registered for the given path in the given channel.
+     *
+     * @param channel {String} The channel of the message.
+     * @param path {String} The path to check.
+     */
+    isListenerRegisteredFor : function(channel, path) {
+      var listeners = this._listener[channel];
+      if (!listeners || qx.lang.Object.isEmpty(listeners)) {
+        qx.Bootstrap.info("No listener found for channel: " + channel);
+        return false;
+      }
+
+      for (var id in listeners)
+      {
+        var listener = listeners[id];
+        if (listener.regExp.test(path)) {
+          return true;
+        }
+      }
+
+      qx.Bootstrap.info("No listener found for path: " + path);
+      return false;
+    },
+
     /**
      * Sends a message on the given channel and informs all matching route handlers.
      *
@@ -234,4 +259,4 @@ qx.Bootstrap.define("qx.event.Messaging",
       return match != undefined;
     }
   }
-});
+});