Hey folks, I am a newer of elixir, but I recently got a urgent demand。It
need forward the websocket request from the cowboy sever (http://127.0.0.1/api) to another server (http://127.0.0.1:8080/abc). In short， how to implement reverse proxy websockets using Cowboy.
The following is the framework I used:
cowboy: 2.9.0
plug_cowboy: 2.6.0
plug: 1.14.0
The following is my simple code:
# application.ex
defmodule Example.Application do
use Application
require Logger
def start(_type, _args) do
children = [
{Plug.Cowboy, scheme: :http, plug: Example.Router, options: [port: 4000]}
]
opts = [strategy: :one_for_one, name: Example.Supervisor]
Logger.info("Starting application...")
Supervisor.start_link(children, opts)
end
end
# router.ex
defmodule Example.Router do
use Plug.Router
plug :match
plug :dispatch
get "/" do
send_resp(conn, 200, "Welcome")
end
get "/start" do
send_resp(conn, 200, "here is start page!")
end
get "/hello" do
send_resp(conn, 200, "hello world!")
end
get "/api" do
send_resp(conn, 200, "need to upforward websocket request to http://127.0.0.1:8080")
end
match _ do
send_resp(conn, 404, "Oops!")
end
end
The resposity of the project is GitHub - hrzyang/elixir_plug_cowboy_example: study elixir web framework plug_cowboy
hope you can help me, thanks very much !
