CODEWITHSUNDEEP
javascriptnode.jsstream
Andrew
Andrew

Reputation: 2114

How to write to a stream after piping?

In NodeJS I have this using ExpressJS (where res is a writable stream)

const readableStream = someAsyncTask();
readableStream.pipe(res);
readableStrean.on('end', () => {
    res.write('a bit more');
    res.end();
});

This is resulting in:

uncaught exception Error: write after end

So I assume the pipe is causing the writable stream to close. How can I pipe the readable stream to the output, and then when that stream ends, stream additional data to the output?

Upvotes: 1

Views: 678

Answers (1)

adeneo
adeneo

Reputation: 318312

From the documentation

readable.pipe(destination[, options])

  • destination <stream.Writable> The destination for writing data
  • options <Object> Pipe options
    end <Boolean> End the writer when the reader ends. Defaults to true.
    ...

If you don't want it to end when piping, pass {end : false} as options

readableStream.pipe(res, { end: false });

Upvotes: 0

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