html5 websocket

@H_419_6@

GET / HTTP/1.1

Host: localhost:9999

User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3

Accept-Encoding: gzip,deflate

Sec-WebSocket-Version: 13

Origin: http://localhost:8080

Sec-WebSocket-Extensions: permessage-deflate

Sec-WebSocket-Key: WHlRkDLmeVYa/jsJANTh/A==

Connection: keep-alive,Upgrade

Pragma: no-cache

Cache-Control: no-cache

Upgrade: websocket

@H_419_6@

@H_419_6@客户端一次普通的http请求升级为websocket

@H_419_6@

@H_419_6@

HTTP/1.1 101 Switching Protocols

Upgrade: websocket

Connection: Upgrade

Sec-WebSocket-Accept: GJSIakbbUVO8nNDclPy821pHJY4=

@H_419_6@

@H_419_6@

@H_419_6@服务端响应， 然后可以互相传数据了

@H_419_6@Sec-WebSocket-Key 解析出来，然后按照把“Sec-WebSocket-Ke”加上一个魔幻字符串“258EAFA5-E914-47DA-95CA-C5AB0DC85B11”。使用SHA-1加密，之后进行BASE-64

@H_419_6@编码，将结果做为“Sec-WebSocket-Accept”头的值，返回给客户端。