@serverless-stack/nextjs-lambda/dist/default-handler/standard/index-891c56ba.js

Provides handlers that can be used in CloudFront Lambda@Edge to deploy next.js applications to the edge

'use strict';

var buffer$1 = require('buffer');
var Stream = require('stream');
var util = require('util');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var buffer__default = /*#__PURE__*/_interopDefaultLegacy(buffer$1);
var Stream__default = /*#__PURE__*/_interopDefaultLegacy(Stream);
var util__default = /*#__PURE__*/_interopDefaultLegacy(util);

const {PassThrough: PassThroughStream} = Stream__default['default'];

var bufferStream = options => {
	options = {...options};

	const {array} = options;
	let {encoding} = options;
	const isBuffer = encoding === 'buffer';
	let objectMode = false;

	if (array) {
		objectMode = !(encoding || isBuffer);
	} else {
		encoding = encoding || 'utf8';
	}

	if (isBuffer) {
		encoding = null;
	}

	const stream = new PassThroughStream({objectMode});

	if (encoding) {
		stream.setEncoding(encoding);
	}

	let length = 0;
	const chunks = [];

	stream.on('data', chunk => {
		chunks.push(chunk);

		if (objectMode) {
			length = chunks.length;
		} else {
			length += chunk.length;
		}
	});

	stream.getBufferedValue = () => {
		if (array) {
			return chunks;
		}

		return isBuffer ? Buffer.concat(chunks, length) : chunks.join('');
	};

	stream.getBufferedLength = () => length;

	return stream;
};

const {constants: BufferConstants} = buffer__default['default'];

const {promisify} = util__default['default'];


const streamPipelinePromisified = promisify(Stream__default['default'].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();
}

var getStream_1 = getStream;
var buffer = (stream, options) => getStream(stream, {...options, encoding: 'buffer'});
var array = (stream, options) => getStream(stream, {...options, array: true});
var MaxBufferError_1 = MaxBufferError;
getStream_1.buffer = buffer;
getStream_1.array = array;
getStream_1.MaxBufferError = MaxBufferError_1;

var index = /*#__PURE__*/Object.freeze(/*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(null), getStream_1, {
	'default': getStream_1,
	buffer: buffer,
	array: array,
	MaxBufferError: MaxBufferError_1
}));

exports.index = index;