stream-promise

[][npm-url]

stream-promise

Convert any Stream instance to thenable

So it can be consumed both as a promise and as a stream

Installation

npm install stream-promise

Usage

Stream must be either readable or writable.

In case of readable stream promise resolves with concatenated output, in case of writable streams resolves simply with null.

To achieve expected result stream should to be converted immediately after initialization.

const streamPromise = require("stream-promise");

streamPromise(someReadableStream);

someReadableStream.then(result => {
	console.log("Concatenated stream output", result);
});

streamPromise(someWritabletream);

someReadableStream.then(result => {
	console.log("Cumulated stream output", result);
});

Non-destructive way

Sepearate promise (without touching stream object) can be created with to-promise util:

const streamToPromise = require("stream-promise/to-promise");

const someReadableStreamPromise = streamPromiseTo(someReadableStream);

someReadableStreamPromise.then(result => {
	console.log("Concatenated stream output", result);
});

Tests

npm test

Changelog

3.0.0 (2019-01-17)

Chores

• publish as steam-promise (feff7a5)

Features

• stream to promise approach (8669fab)

BREAKING CHANGES

• Remove non that useful StreamPromise construtor with utility that converts initialized stream to promise
• We're skipping v1 to avoid semver confusion with previously published version by other author

<a name="1.0.0"></a>