Catch websocket exception and relative fix urls (#10)

* Catch exception

* Catch server disconnect and log token

* Log websocket messages

* Switch to relative urls

* Remove debugging lines

opsdroid_homeassistant/connector/__init__.py

@@ -43,13 +43,13 @@ def __init__(self, config, opsdroid=None):
         self.listening = None
         self.discovery_info = None
         self.token = self.config.get("token")
-        self.api_url = urllib.parse.urljoin(self.config.get("url"), "/api/")
+        self.api_url = urllib.parse.urljoin(self.config.get("url"), "api/")
 
         # The websocket URL can differ depending on how Home Assistant was installed.
         # So we will iterate over the various urls when attempting to connect.
         self.websocket_urls = [
             urllib.parse.urljoin(self.api_url, "websocket"),  # Plain Home Assistant
-            urllib.parse.urljoin(self.config.get("url"), "/websocket"),  # Hassio proxy
+            urllib.parse.urljoin(self.config.get("url"), "websocket"),  # Hassio proxy
         ]
         self.id = 1
 
@@ -74,7 +74,11 @@ async def listen(self):
                                 elif msg.type == aiohttp.WSMsgType.ERROR:
                                     break
                         _LOGGER.info("Home Assistant closed the websocket, retrying...")
-                    except aiohttp.client_exceptions.ClientConnectorError:
+                    except (
+                        aiohttp.client_exceptions.ClientConnectorError,
+                        aiohttp.client_exceptions.WSServerHandshakeError,
+                        aiohttp.client_exceptions.ServerDisconnectedError,
+                    ):
                         _LOGGER.info("Unable to connect to Home Assistant, retrying...")
                     await asyncio.sleep(1)