Node流中的结束事件和结束事件有什么区别 [英] What's the difference between end and finish events in Node streams

问题描述

Node.js流同时触发end和finish事件.两者有什么区别?

Node.js streams triggers both end and finish events. What's the difference between both?

推荐答案

end和finish是在不同类型的流上的相同事件，但

end and finish are the same event BUT on different types of Streams.

• stream.Readable仅触发end，从不触发finish
• stream.Writable仅触发finish，永不触发end

• stream.Readable fires ONLY end and NEVER finish
• stream.Writable fires ONLY finish and NEVER end

来源: https://nodejs.org/dist/latest-v5.x /docs/api/stream.html

为什么同一事件的命名不同?

我能想到的唯一原因是因为双工流(stream.Duplex)同时实现了stream.Readable和stream.Writable接口(

The only reason I could think of is because of duplex streams (stream.Duplex), which implement both stream.Readable and stream.Writable interfaces (https://nodejs.org/dist/latest-v5.x/docs/api/stream.html#stream_class_stream_duplex) are readable and writable stream at the same time. To differentiate between end of reading and end of writing on the stream you must have a different event fired. SO, for Duplex streams end is end of reading and finish is end of writing.

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