elixir socket

Elixir 插座做得不错

该库包装了gen_tcp 、 gen_udp和gen_sctp 、 ssl并实现了 websockets 和ocks。

安装

在您的mix.exs文件中

 defp deps do
  [
    # ...
    {:socket, "~> 0.3"},
    # ...
  ]
end

然后运行mix deps.get进行安装

示例

 defmodule HTTP do
  def get ( uri ) when is_binary ( uri ) or is_list ( uri ) do
    get ( URI . parse ( uri ) )
  end

  def get ( % URI { host: host , port: port , path: path } ) do
    sock = Socket.TCP . connect! host , port , packet: :line
    sock |> Socket.Stream . send! "GET #{ path || "/" } HTTP/1.1 r n Host: #{ host } r n r n "

    [ _ , code , text ] = Regex . run ~r " HTTP/1.1 (.*?) (.*?) s *$ " , sock |> Socket.Stream . recv!

    headers = headers ( [ ] , sock ) |> Enum . into ( % { } )

    sock |> Socket . packet! :raw
    body = sock |> Socket.Stream . recv! ( String . to_integer ( headers [ "Content-Length" ] ) )

    { { String . to_integer ( code ) , text } , headers , body }
  end

  defp headers ( acc , sock ) do
    case sock |> Socket.Stream . recv! do
      " r n " ->
        acc

      line ->
        [ _ , name , value ] = Regex . run ~r / ^(.*?): s *(.*?) s *$ / , line

        headers ( [ { name , value } | acc ] , sock )
    end
  end
end 

网络套接字

客户

 socket = Socket.Web . connect! "echo.websocket.org"
socket |> Socket.Web . send! { :text , "test" }
socket |> Socket.Web . recv! # => {:text, "test"}

为了连接到 TLS websocket，请使用secure: true选项：

 socket = Socket.Web . connect! "echo.websocket.org" , secure: true

connect!函数还接受其他参数，最值得注意的是path参数，当 websocket 服务器端点存在于域下方的路径上时使用该参数。 “example.com/websocket”：

 socket = Socket.Web . connect! "example.com" , path: "/websocket"

请注意，websocket 服务器发送 ping 消息。来自客户端的 pong 回复告诉服务器保持连接打开并发送更多数据。如果您的客户端没有发送 pong 回复，那么服务器将关闭连接。以下是如何获取所需数据并回复服务器 ping 的示例：

 socket = Socket.Web . connect! "echo.websocket.org"
case socket |> Socket.Web . recv! do
  { :text , data } ->
    # process data
  { :ping , _ } - >
    socket |> Socket.Web . send! ( { :pong , "" } )
end

服务器

 server = Socket.Web . listen! 80
client = server |> Socket.Web . accept!

# here you can verify if you want to accept the request or not, call
# `Socket.Web.close!` if you don't want to accept it, or else call
# `Socket.Web.accept!`
client |> Socket.Web . accept!

# echo the first message
client |> Socket.Web . send! ( client |> Socket.Web . recv! )