Using Cowboy2 WebSocket handlers and Phoenix Channels on the same application

Phoenix Forum Questions / Help
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1

Does anyone know if it is possible to use Phoenix Channels and Cowboy WebSockets on the same application?
It looks like that adding http: [dispatch: [...] to my config/config.exs breaks phoenix channels.

After that change now I always get (Phoenix.Router.NoRouteError) no route found for GET /socket/websocket.
My dispatch code is the following:

  http: [dispatch: [
    {:_, [
      {"/mysock", MyWebsocketApp.SocketHandler, []},
      {:_, Plug.Cowboy.Handler, {Astarte.DeviceForwarderWeb.Endpoint, []}}
    ]}
  ]]

lib/astarte_device_forwarder_web/endpoint.ex:

socket "/socket", Astarte.DeviceForwarderWeb.UserSocket,
  websocket: [connect_info: [:peer_data, :x_headers]],
  longpoll: false
2 Likes
2

I have this working

    dispatch: [
      {:_,
       [
         {"/ws", MyAppWeb.Websocket, []},
         {:_, Phoenix.Endpoint.Cowboy2Handler, {MyAppWeb.Endpoint, []}}
       ]}
    ]

I guess the difference is Plug.Cowboy.Handler vs Phoenix.Endpoint.Cowboy2Handler.

Hopefully this works for you.

2 Likes
3

Thanks, it works :slight_smile: