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'use strict'; const {constants: BufferConstants} = require('buffer'); const stream = require('stream'); const {promisify} = require('util'); const bufferStream = require('./buffer-stream'); const streamPipelinePromisified = promisify(stream.pipeline); class MaxBufferError extends Error { constructor() { super('maxBuffer exceeded'); this.name = 'MaxBufferError'; } } async function getStream(inputStream, options) { if (!inputStream) { throw new Error('Expected a stream'); } options = { maxBuffer: Infinity, ...options }; const {maxBuffer} = options; const stream = bufferStream(options); 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); }; (async () => { try { await streamPipelinePromisified(inputStream, stream); resolve(); } catch (error) { rejectPromise(error); } })(); stream.on('data', () => { if (stream.getBufferedLength() > maxBuffer) { rejectPromise(new MaxBufferError()); } }); }); return stream.getBufferedValue(); } module.exports = 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;