Support for --version on the command line.

gns3server/main.py

@@ -33,6 +33,7 @@ from tornado.options import define
 define("host", default="0.0.0.0", help="run on the given host/IP address", type=str)
 define("port", default=8000, help="run on the given port", type=int)
 define("ipc", default=False, help="use IPC for module communication", type=bool)
+define("version", default=False, help="show the version", type=bool)
 
 
 def locale_check():
@@ -78,6 +79,17 @@ def main():
     Entry point for GNS3 server
     """
 
+    try:
+        tornado.options.parse_command_line()
+    except (tornado.options.Error, ValueError):
+        tornado.options.print_help()
+        raise SystemExit
+
+    from tornado.options import options
+    if options.version:
+        print(__version__)
+        raise SystemExit
+
     if sys.platform.startswith("win"):
         # necessary on Windows to freeze the application
         multiprocessing.freeze_support()
@@ -95,17 +107,10 @@ def main():
                                                                                  micro=sys.version_info[2],
                                                                                  pid=os.getpid()))
 
-    try:
-        tornado.options.parse_command_line()
-    except (tornado.options.Error, ValueError):
-        tornado.options.print_help()
-        raise SystemExit
-
     # check for the correct locale
     # (UNIX/Linux only)
     locale_check()
 
-    from tornado.options import options
     server = Server(options.host,
                     options.port,
                     ipc=options.ipc)

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):
         """