Support for --version on the command line.

gns3server/modules/iou/__init__.py

@@ -263,6 +263,30 @@ class IOU(IModule):
 
         log.debug("received request {}".format(request))
 
+    def test_result(self, message, result="error"):
+        """
+        """
+
+        return {"result": result, "message": message}
+
+    @IModule.route("iou.test_settings")
+    def test_settings(self, request):
+        """
+        """
+
+        response = []
+
+        # test iourc
+        if self._iourc == "":
+            response.append(self.test_result("No iourc file has been added"))
+        elif not os.path.isfile(self._iourc):
+            response.append(self.test_result("iourc file {} is not accessible".format(self._iourc)))
+        else:
+            #TODO: check hostname + license inside the file
+            pass
+
+        self.send_response(response)
+
     @IModule.route("iou.create")
     def iou_create(self, request):
         """