我确实在libevent中实现了一个websocket服务器,虽然我在Chrome或Firefox上没有任何问题,但在IE10上我甚至无法建立连接。
这里的握手:
IE10 Request:
GET /echo HTTP/1.1
Origin: 95.115.195.4
Sec-WebSocket-Key: rgPWUlUtk+h3CPWqk99OtA==
Connection: Upgrade
Upgrade: Websocket
Sec-WebSocket-Version: 8
User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)
Host: 95.115.195.4:5555
Cache-Control: no-cache
Server Response:
HTTP/1.1 101 Switching Protocols
Upgrade: Websocket
Connection: Upgrade
Sec-WebSocket-Accept: jGmgQ/jOvew8MU9o3bbqPG9PHlY=
Sec-WebSocket-Protocol: chat
IE10调试器说:SCRIPT12152:WebSocket错误:HTTP响应不正确。状态代码101
有人知道我做错了什么吗?
感谢
客户端没有发送子协议列表,但您的服务器已发送回"聊天;作为子协议值。根据IETF 6455 WebSocket规范第19页(第4.1节客户端要求结束):
6. If the response includes a |Sec-WebSocket-Protocol| header field
and this header field indicates the use of a subprotocol that was
not present in the client's handshake (the server has indicated a
subprotocol not requested by the client), the client MUST _Fail
the WebSocket Connection_.
服务器应该只发送";Sec-WebSocket协议:SUBPROTOCOL";如果客户端发送一个";Sec WebSocket协议:SUBPROTOCOL"标头到服务器。请注意,客户端可以发送子协议列表,如果发送了,服务器必须从列表中选择一个子协议进行响应。
Firefox和Chrome可能过于宽容,没有遵守当前版本的规范。