Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/get-stream/index.js

@@ -0,0 +1,60 @@
+'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;