事件:'pipe'

\Event: 'pipe'

• src <stream.Readable> 通过管道传输到此可写的源流

  \src <stream.Readable> source stream that is piping to this writable

当在可读流上调用 stream.pipe() 方法将此可写流添加到其目标集时,则触发 'pipe' 事件。

\The 'pipe' event is emitted when the stream.pipe() method is called on a readable stream, adding this writable to its set of destinations.

const writer = getWritableStreamSomehow();
const reader = getReadableStreamSomehow();
writer.on('pipe', (src) => {
 console.log('Something is piping into the writer.');
 assert.equal(src, reader);
});
reader.pipe(writer); 拷贝