aaac7fed
 liuqimichale
add
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'use strict';
var parse = require('url-parse');
/**
* Transform an URL to a valid origin value.
*
* @param {String|Object} url URL to transform to it's origin.
* @returns {String} The origin.
* @api public
*/
function origin(url) {
if ('string' === typeof url) url = parse(url);
//
// 6.2. ASCII Serialization of an Origin
// http://tools.ietf.org/html/rfc6454#section-6.2
//
if (!url.protocol || !url.hostname) return 'null';
//
// 4. Origin of a URI
// http://tools.ietf.org/html/rfc6454#section-4
//
// States that url.scheme, host should be converted to lower case. This also
// makes it easier to match origins as everything is just lower case.
//
return (url.protocol +'//'+ url.host).toLowerCase();
}
/**
* Check if the origins are the same.
*
* @param {String} a URL or origin of a.
* @param {String} b URL or origin of b.
* @returns {Boolean}
* @api public
*/
origin.same = function same(a, b) {
return origin(a) === origin(b);
};
//
// Expose the origin
//
module.exports = origin;
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