WebSocket 是什么原理？为什么可以实现持久连接？ - Ovear 的回答 - 知乎



WebSocket 是什么原理？为什么可以实现持久连接？ - Ovear 的回答 - 知乎

或者说WebSocket干脆就不是基于HTTP来执行的。但是。。。说不通啊。。。 额。。最高票答案没答到点子上，最后怎么跑到Nodejs上去了。。Websocket只是协议而已。。 首先HTTP有1.1和1.0之说，也就是所谓的keep-alive，把多个HTTP请求合并为一个，但是Websocket其实是一个新协议，跟HTTP协议基本没有关系，只是为了兼容现有浏览器的握手规范而已，也就是说它是HTTP协议上的一种补充可以通过这样一张图理解 通俗来说，你可以用HTTP协议传输非Html数据，就是这样=。= 教练，你BB了这么多，跟Websocket有什么关系呢？ _(:з」∠)_好吧，我正准备说Websocket呢。。 熟悉HTTP的童鞋可能发现了，这段类似HTTP协议的握手请求中，多了几个东西。 Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw== Sec-WebSocket-Protocol: chat, superchat Sec-WebSocket-Version:

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