'use strict';
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var parse = require('url-parse');
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/**
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* Transform an URL to a valid origin value.
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*
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* @param {String|Object} url URL to transform to it's origin.
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* @returns {String} The origin.
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* @api public
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*/
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function origin(url) {
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if ('string' === typeof url) url = parse(url);
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//
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// 6.2. ASCII Serialization of an Origin
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// http://tools.ietf.org/html/rfc6454#section-6.2
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//
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if (!url.protocol || !url.hostname) return 'null';
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//
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// 4. Origin of a URI
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// http://tools.ietf.org/html/rfc6454#section-4
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//
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// States that url.scheme, host should be converted to lower case. This also
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// makes it easier to match origins as everything is just lower case.
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//
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return (url.protocol +'//'+ url.host).toLowerCase();
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}
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/**
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* Check if the origins are the same.
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*
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* @param {String} a URL or origin of a.
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* @param {String} b URL or origin of b.
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* @returns {Boolean}
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* @api public
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*/
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origin.same = function same(a, b) {
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return origin(a) === origin(b);
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};
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//
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// Expose the origin
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//
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module.exports = origin;
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