You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.4 KiB
61 lines
1.4 KiB
'use strict';
|
|
const {constants: BufferConstants} = require('buffer');
|
|
const pump = require('pump');
|
|
const bufferStream = require('./buffer-stream');
|
|
|
|
class MaxBufferError extends Error {
|
|
constructor() {
|
|
super('maxBuffer exceeded');
|
|
this.name = 'MaxBufferError';
|
|
}
|
|
}
|
|
|
|
async function getStream(inputStream, options) {
|
|
if (!inputStream) {
|
|
return Promise.reject(new Error('Expected a stream'));
|
|
}
|
|
|
|
options = {
|
|
maxBuffer: Infinity,
|
|
...options
|
|
};
|
|
|
|
const {maxBuffer} = options;
|
|
|
|
let stream;
|
|
await new Promise((resolve, reject) => {
|
|
const rejectPromise = error => {
|
|
// Don't retrieve an oversized buffer.
|
|
if (error && stream.getBufferedLength() <= BufferConstants.MAX_LENGTH) {
|
|
error.bufferedData = stream.getBufferedValue();
|
|
}
|
|
|
|
reject(error);
|
|
};
|
|
|
|
stream = pump(inputStream, bufferStream(options), error => {
|
|
if (error) {
|
|
rejectPromise(error);
|
|
return;
|
|
}
|
|
|
|
resolve();
|
|
});
|
|
|
|
stream.on('data', () => {
|
|
if (stream.getBufferedLength() > maxBuffer) {
|
|
rejectPromise(new MaxBufferError());
|
|
}
|
|
});
|
|
});
|
|
|
|
return stream.getBufferedValue();
|
|
}
|
|
|
|
module.exports = getStream;
|
|
// TODO: Remove this for the next major release
|
|
module.exports.default = getStream;
|
|
module.exports.buffer = (stream, options) => getStream(stream, {...options, encoding: 'buffer'});
|
|
module.exports.array = (stream, options) => getStream(stream, {...options, array: true});
|
|
module.exports.MaxBufferError = MaxBufferError;
|