'finish' 与 'end' 事件

'finish' 事件在调用 stream.end() 并且所有块都已被 stream._transform() 处理后触发。 'end' 事件在所有数据输出后触发，该事件发生在调用 transform._flush() 中的回调之后。

The 'finish' and 'end' events are from the stream.Writable and stream.Readable classes, respectively. The 'finish' event is emitted after stream.end() is called and all chunks have been processed by stream._transform(). The 'end' event is emitted after all data has been output, which occurs after the callback in transform._flush() has been called.