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express-server/node_modules/get-stream/index.js

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+'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}));