1 | ;
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2 |
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3 | var parse = require('url-parse');
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4 |
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5 | /**
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6 | * Transform an URL to a valid origin value.
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7 | *
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8 | * @param {String|Object} url URL to transform to it's origin.
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9 | * @returns {String} The origin.
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10 | * @api public
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11 | */
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12 | function origin(url) {
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13 | if ('string' === typeof url) url = parse(url);
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14 |
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15 | //
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16 | // 6.2. ASCII Serialization of an Origin
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17 | // http://tools.ietf.org/html/rfc6454#section-6.2
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18 | //
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19 | if (!url.protocol || !url.hostname) return 'null';
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20 |
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21 | //
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22 | // 4. Origin of a URI
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23 | // http://tools.ietf.org/html/rfc6454#section-4
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24 | //
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25 | // States that url.scheme, host should be converted to lower case. This also
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26 | // makes it easier to match origins as everything is just lower case.
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27 | //
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28 | return (url.protocol +'//'+ url.host).toLowerCase();
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29 | }
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30 |
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31 | /**
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32 | * Check if the origins are the same.
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33 | *
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34 | * @param {String} a URL or origin of a.
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35 | * @param {String} b URL or origin of b.
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36 | * @returns {Boolean}
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37 | * @api public
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38 | */
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39 | origin.same = function same(a, b) {
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40 | return origin(a) === origin(b);
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41 | };
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42 |
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43 | //
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44 | // Expose the origin
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45 | //
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46 | module.exports = origin;
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