Is sending a stream to a variable the best option, or could there be another solution

Question

Is sending a stream to a variable the best option, or could there be another solution

Is there a way to pipe stream data to a variable? The writable stream examples mentioned in this documentation include:

HTTP requests on the client side
HTTP responses on the server side
Zlib streams
Crypto streams
TCP sockets
Child process stdin
Process stdout and stderr

Does this mean it's not possible to pipe stream data to a variable for processing? I don't want to store the stream data on my disk, so what is the most efficient way to combine all the streams and work with the data?

Thank you! Please feel free to ask if you need more details!

javascript node.js express stream

Answer 1

Answer №1

It is possible to pipe a stream to a variable, however, the pipe function is typically used to direct the stream to another method that can effectively handle it. The pipe function extracts all the data from a readable stream and transfers it to the specified destination in a controlled manner to prevent overwhelming the destination with a fast stream.

For example, you can pipe a stream to a file like this:

someReadableStream.pipe(fs.createWriteStream("result.json"));

If your goal is simply to store the data in a variable, there are more convenient event options available for achieving this, such as using on('data'):

var readable = getReadableStreamSomehow(),
    result   = '';

readable.on('data', function(chunk) {
      result += chunk;
});

readable.on('end', function () {
    // perform actions with "result"
});

Answer 2

It is possible to pipe a stream to a variable, however, the pipe function is typically used to direct the stream to another method that can effectively handle it. The pipe function extracts all the data from a readable stream and transfers it to the specified destination in a controlled manner to prevent overwhelming the destination with a fast stream.

For example, you can pipe a stream to a file like this:

someReadableStream.pipe(fs.createWriteStream("result.json"));

If your goal is simply to store the data in a variable, there are more convenient event options available for achieving this, such as using on('data'):

var readable = getReadableStreamSomehow(),
    result   = '';

readable.on('data', function(chunk) {
      result += chunk;
});

readable.on('end', function () {
    // perform actions with "result"
});

Is sending a stream to a variable the best option, or could there be another solution

Answer №1

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