事件：'connection'

¥Event: 'connection'

• socket <stream.Duplex>

此事件在建立新的 TCP 流时触发，在 TLS 握手开始之前。socket 通常是 net.Socket 类型的对象。通常用户不会想访问这个事件。

¥This event is emitted when a new TCP stream is established, before the TLS handshake begins. socket is typically an object of type net.Socket. Usually users will not want to access this event.

此事件也可以由用户显式触发，以将连接注入 HTTP 服务器。在这种情况下，任何 Duplex 流都可以通过。

¥This event can also be explicitly emitted by users to inject connections into the HTTP server. In that case, any Duplex stream can be passed.