事件：'finish'

【Event: 'finish'】

当响应已发送时触发。更具体地说，当响应头和主体的最后一部分已交给 HTTP/2 多路复用以在网络上发送时，将触发此事件。这并不意味着客户端已经接收到任何内容。

【Emitted when the response has been sent. More specifically, this event is emitted when the last segment of the response headers and body have been handed off to the HTTP/2 multiplexing for transmission over the network. It does not imply that the client has received anything yet.】

在此事件之后，响应对象上将不再触发更多事件。

【After this event, no more events will be emitted on the response object.】