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