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  1. JavaScript_Notes JavaScript_Notes Public

    learn and work by JS

  2. Work-Notes Work-Notes Public

    记录工作中遇到的问题和总结,便于之后归纳

    1

  3. chenqiaodonghu chenqiaodonghu Public

    【陈桥东湖】网站建立日志

    JavaScript

  4. webSocket,HTTP, AJAX轮询,long poll webSocket,HTTP, AJAX轮询,long poll
    1
    WebSocket是H5所出的一个协议(H5是一系列新的API,或者说是新技术,新规范),基于HTTP,但同HTTP协议基本没什么关系。
    2
    它同HTTP都是浏览器的握手协议组成部分,但是WebSocket是持久化的,HTTP是非持久的,无状态协议。
    3
    实时信息传递的几个方式:
    4
    1.Ajax轮询。 不间断地向服务器发送请求,询问服务器是否有新信息。缺点是,需要服务器有足够的处理速度和资源。(速度)
    5
    2.long poll。 浏览器向服务器发送请求后,服务器如果没有消息不会立马返回response,而是等到有消息后再返回给浏览器。
  5. blog blog Public

    blog

    HTML

  6. FE FE Public