Socket won't connect to Endpoint

问题

var socket = new Socket("localhost:4000")
socket.connect()

Returns WebSocket connection to 'ws://localhost:4000/ws' failed: Error during WebSocket handshake: Unexpected response code: 404

But I do have the socket on the /ws endpoint, right?

defmodule Sapphire.Endpoint do
  use Phoenix.Endpoint, otp_app: :sapphire

  socket "/ws", Sapphire.MomentSocket

  plug Plug.Static,
    at: "/", from: :sapphire, gzip: false,
    only: ~w(css fonts images js favicon.ico robots.txt)

  if code_reloading? do
    socket "/phoenix/live_reload/socket", Phoenix.LiveReloader.Socket
    plug Phoenix.LiveReloader
    plug Phoenix.CodeReloader
  end

  plug Plug.RequestId
  plug Plug.Logger

  plug Plug.Parsers,
    parsers: [:urlencoded, :multipart, :json],
    pass: ["*/*"],
    json_decoder: Poison

  plug Plug.MethodOverride
  plug Plug.Head

  plug Plug.Session,
    store: :cookie,
    key: "_sapphire_key",
    signing_salt: "hW1bFEcR"

  plug Sapphire.Router

end

It should be able to connect to that endpoint, but for some reason it can't reach it at all.

[info] Running Sapphire.Endpoint with Cowboy on http://localhost:4000

回答1:

@JoséValim found the solution.

I was porting the phoenix.js library to coffeescript and missed the fact that the suffix of the path should be whatever the transport layer is. In this case, it needed /websocket at the end in the implementation. :)

回答2:

Full disclosure -- I'm a noob, and I'm probably screwing something up, but this is how I got back on track.

rm -rf deps/phoenix

This will clear out your present version of phoenix (which includes phoenix.js)

mix do deps.get

This pulls down phoenix again.

Hopefully this is enough to get you going again at this point -- but if you screwed up a migration like me, and you're on mac/linux, do a:

find . -name phoenix.js

Voila, there is the phoenix.js fixed by Jose. I was lazy and just copied over that phoenix.js to get things going for the time being.

来源：https://stackoverflow.com/questions/32665406/socket-wont-connect-to-endpoint

标签

elixir

phoenix-framework