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Understanding stream backpressure

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0

I'm trying to understand stream backpressure in Nodejs. I get the basics after reading https://nodejs.org/en/docs/guides/backpressuring-in-streams/. But I'm confused over what I should do in scenarios where pipe cannot be directly used.

e.g. If I stream download a file to a zip.

var fs = require('fs');
const request = require('request');
const archiver = require('archiver');


var output = fs.createWriteStream('stream_to_zip.zip');
var archive = archiver('zip', 
 zlib: level: 9 
);
// pipe archive data to the file
archive.pipe(output);

const stream = request('https://i.imgur.com/FI0XpDV.jpg');
archive.append(stream, name: 'pictures/dog.jpg' );

const stream2 = request('https://i.imgur.com/iqz0XlX.jpg');
archive.append(stream2, name: 'pictures/holiday.jpg' );

archive.finalize();

Basically I'd like to know if

archive.append(stream, name: 'pictures/dog.jpg' );

is protected from backpressure? It stands out to me as I can't simply call

archive.pipe(stream)

as I need to specify the file's name.

javascript stream pipe backpressure node-archiver

share|improve this question

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

add a comment | 

0

I'm trying to understand stream backpressure in Nodejs. I get the basics after reading https://nodejs.org/en/docs/guides/backpressuring-in-streams/. But I'm confused over what I should do in scenarios where pipe cannot be directly used.

e.g. If I stream download a file to a zip.

var fs = require('fs');
const request = require('request');
const archiver = require('archiver');


var output = fs.createWriteStream('stream_to_zip.zip');
var archive = archiver('zip', 
 zlib: level: 9 
);
// pipe archive data to the file
archive.pipe(output);

const stream = request('https://i.imgur.com/FI0XpDV.jpg');
archive.append(stream, name: 'pictures/dog.jpg' );

const stream2 = request('https://i.imgur.com/iqz0XlX.jpg');
archive.append(stream2, name: 'pictures/holiday.jpg' );

archive.finalize();

Basically I'd like to know if

archive.append(stream, name: 'pictures/dog.jpg' );

is protected from backpressure? It stands out to me as I can't simply call

archive.pipe(stream)

as I need to specify the file's name.

javascript stream pipe backpressure node-archiver

share|improve this question

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

add a comment | 

I'm trying to understand stream backpressure in Nodejs. I get the basics after reading https://nodejs.org/en/docs/guides/backpressuring-in-streams/. But I'm confused over what I should do in scenarios where pipe cannot be directly used.

e.g. If I stream download a file to a zip.

var fs = require('fs');
const request = require('request');
const archiver = require('archiver');


var output = fs.createWriteStream('stream_to_zip.zip');
var archive = archiver('zip', 
 zlib: level: 9 
);
// pipe archive data to the file
archive.pipe(output);

const stream = request('https://i.imgur.com/FI0XpDV.jpg');
archive.append(stream, name: 'pictures/dog.jpg' );

const stream2 = request('https://i.imgur.com/iqz0XlX.jpg');
archive.append(stream2, name: 'pictures/holiday.jpg' );

archive.finalize();

Basically I'd like to know if

archive.append(stream, name: 'pictures/dog.jpg' );

is protected from backpressure? It stands out to me as I can't simply call

archive.pipe(stream)

as I need to specify the file's name.

javascript stream pipe backpressure node-archiver

share|improve this question

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

var fs = require('fs');
const request = require('request');
const archiver = require('archiver');


var output = fs.createWriteStream('stream_to_zip.zip');
var archive = archiver('zip', 
 zlib: level: 9 
);
// pipe archive data to the file
archive.pipe(output);

const stream = request('https://i.imgur.com/FI0XpDV.jpg');
archive.append(stream, name: 'pictures/dog.jpg' );

const stream2 = request('https://i.imgur.com/iqz0XlX.jpg');
archive.append(stream2, name: 'pictures/holiday.jpg' );

archive.finalize();

archive.append(stream, name: 'pictures/dog.jpg' );

archive.pipe(stream)

share|improve this question

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

share|improve this question

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges

asked Mar 27 at 18:23

Shane GannonShane Gannon

1,60211 gold badge2121 silver badges3636 bronze badges