forked from arne/asdf-games
52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
'use strict';
|
|
const bufferStream = require('./buffer-stream');
|
|
|
|
function getStream(inputStream, opts) {
|
|
if (!inputStream) {
|
|
return Promise.reject(new Error('Expected a stream'));
|
|
}
|
|
|
|
opts = Object.assign({maxBuffer: Infinity}, opts);
|
|
|
|
const maxBuffer = opts.maxBuffer;
|
|
let stream;
|
|
let clean;
|
|
|
|
const p = new Promise((resolve, reject) => {
|
|
const error = err => {
|
|
if (err) { // null check
|
|
err.bufferedData = stream.getBufferedValue();
|
|
}
|
|
|
|
reject(err);
|
|
};
|
|
|
|
stream = bufferStream(opts);
|
|
inputStream.once('error', error);
|
|
inputStream.pipe(stream);
|
|
|
|
stream.on('data', () => {
|
|
if (stream.getBufferedLength() > maxBuffer) {
|
|
reject(new Error('maxBuffer exceeded'));
|
|
}
|
|
});
|
|
stream.once('error', error);
|
|
stream.on('end', resolve);
|
|
|
|
clean = () => {
|
|
// some streams doesn't implement the `stream.Readable` interface correctly
|
|
if (inputStream.unpipe) {
|
|
inputStream.unpipe(stream);
|
|
}
|
|
};
|
|
});
|
|
|
|
p.then(clean, clean);
|
|
|
|
return p.then(() => stream.getBufferedValue());
|
|
}
|
|
|
|
module.exports = getStream;
|
|
module.exports.buffer = (stream, opts) => getStream(stream, Object.assign({}, opts, {encoding: 'buffer'}));
|
|
module.exports.array = (stream, opts) => getStream(stream, Object.assign({}, opts, {array: true}));
|