promisify-stream-chunks

promisify-stream-chunks

All chunks in an object stream are sent to a callback which returns a promise. The next chunk will not be processed before the previous chunk's promise is resolved.

• Works on object streams only.

How?

const promisifyStreamChunks = require('promisify-stream-chunks');

const rs = new Readable({ objectMode: true });
rs.push({ test: 'first' });
rs.push({ test: 'second' });
rs.push({ test: 'third' });
rs.push(null);

rs.pipe(promisifyStreamChunks(chunk => {

	return new Promise((resolve, reject) => {
		doAsyncThings(chunk, () => {
			resolve();

			// If you want to transform the values in the stream, do:
			// resolve({ example: 'my data' });
		});

	});

});

Roadmap

• We should have a way of handling rejects/errors. Right now, they are only outputed to stderr.