Hi!
I have a Phoenix server (named Backend).
I created a channel called ShoppingListChannel with:
mix phx.gen.channel ShoppingListChannel
As instructed I added the channel to lib/backend_web/channels/user_socket.ex:
defmodule BackendWeb.UserSocket do
use Phoenix.Socket
## Channels
# channel "room:*", BackendWeb.RoomChannel
channel "shopping_list_channel:lobby", BackendWeb.ShoppingListChannelChannel
# Socket params are passed from the client and can
# be used to verify and authenticate a user. After
# verification, you can put default assigns into
# the socket that will be set for all channels, ie
#
# {:ok, assign(socket, :user_id, verified_user_id)}
#
# To deny connection, return `:error`.
#
# See `Phoenix.Token` documentation for examples in
# performing token verification on connect.
def connect(_params, socket, _connect_info) do
{:ok, socket}
end
# Socket id's are topics that allow you to identify all sockets for a given user:
#
# def id(socket), do: "user_socket:#{socket.assigns.user_id}"
#
# Would allow you to broadcast a "disconnect" event and terminate
# all active sockets and channels for a given user:
#
# BackendWeb.Endpoint.broadcast("user_socket:#{user.id}", "disconnect", %{})
#
# Returning `nil` makes this socket anonymous.
def id(_socket), do: nil
end
I changed the join function because at this point I do not care about the payload:
defmodule BackendWeb.ShoppingListChannelChannel do
use BackendWeb, :channel
def join("shopping_list_channel:lobby", _payload, socket) do
{:ok, socket}
#if authorized?(payload) do
# {:ok, socket}
#else
# {:error, %{reason: "unauthorized"}}
#end
end
# Channels can be used in a request/response fashion
# by sending replies to requests from the client
def handle_in("ping", payload, socket) do
{:reply, {:ok, payload}, socket}
end
# It is also common to receive messages from the client and
# broadcast to everyone in the current topic (shopping_list_channel:lobby).
def handle_in("shout", payload, socket) do
broadcast socket, "shout", payload
{:noreply, socket}
end
# Add authorization logic here as required.
defp authorized?(_payload) do
true
end
end
My problem is I tried to connect to the socket and then a channel with JS from a separate front-end, but it does not work:
var ws = new WebSocket("ws://localhost:4000/socket")
Any advices?
Cheers