Office Whisperer

/** * node-compress-commons * * Copyright (c) 2014 Chris Talkington, contributors. * Licensed under the MIT license. * https://github.com/archiverjs/node-compress-commons/blob/master/LICENSE-MIT */ var Stream = require('stream').Stream; var PassThrough = require('readable-stream').PassThrough; var util = module.exports = {}; util.isStream = function(source) { return source instanceof Stream; }; util.normalizeInputSource = function(source) { if (source === null) { return Buffer.alloc(0); } else if (typeof source === 'string') { return Buffer.from(source); } else if (util.isStream(source) && !source._readableState) { var normalized = new PassThrough(); source.pipe(normalized); return normalized; } return source; };