Node.js如何响应升级请求？ [英] Node.js how to respond to an upgrade request?

问题描述

我正在从Node.js http服务器处理websocket'upgrade'事件 - 升级处理程序在表单函数（req，socket，head）中 - 如何在此处发送响应此升级请求没有res对象？有没有办法使用套接字对象？如何发回标题？

I'm handling a websocket 'upgrade' event from a Node.js http server - The upgrade handler is in the form function(req, socket, head) - How can I send a response to this upgrade request given that there is no res object? Is there a way to do it using the socket object? How to send back headers?

推荐答案

你只需要调用 socket.write 使用适当的HTTP语法作为这些行的纯文本（来自维基百科）：

You just need to call socket.write with the appropriate HTTP syntax as plain text along these lines (from wikipedia):

HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk=
Sec-WebSocket-Protocol: chat

使用 \ r \ n 行分隔符。在那之后，HTTP结束了，现在你只是使用裸TCP套接字。

Use \r\n line separators. After that point, HTTP is over and now you are just using the bare TCP socket.

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