50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
'use strict';
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const pump = require('pump');
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const bufferStream = require('./buffer-stream');
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class MaxBufferError extends Error {
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constructor() {
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super('maxBuffer exceeded');
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this.name = 'MaxBufferError';
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}
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}
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function getStream(inputStream, options) {
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if (!inputStream) {
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return Promise.reject(new Error('Expected a stream'));
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}
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options = Object.assign({maxBuffer: Infinity}, options);
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const {maxBuffer} = options;
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let stream;
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return new Promise((resolve, reject) => {
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const rejectPromise = error => {
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if (error) { // A null check
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error.bufferedData = stream.getBufferedValue();
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}
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reject(error);
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};
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stream = pump(inputStream, bufferStream(options), error => {
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if (error) {
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rejectPromise(error);
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return;
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}
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resolve();
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});
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stream.on('data', () => {
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if (stream.getBufferedLength() > maxBuffer) {
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rejectPromise(new MaxBufferError());
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}
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});
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}).then(() => stream.getBufferedValue());
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}
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module.exports = getStream;
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module.exports.buffer = (stream, options) => getStream(stream, Object.assign({}, options, {encoding: 'buffer'}));
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module.exports.array = (stream, options) => getStream(stream, Object.assign({}, options, {array: true}));
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module.exports.MaxBufferError = MaxBufferError;
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