uri.vanilla.js

/**
 * @module uri
 * @description A set of helpers to work with URI
 */

modules.define('uri',  function(provide) {

// Equivalency table for cp1251 and utf8.
var map = { '%D0' : '%D0%A0', '%C0' : '%D0%90', '%C1' : '%D0%91', '%C2' : '%D0%92', '%C3' : '%D0%93', '%C4' : '%D0%94', '%C5' : '%D0%95', '%A8' : '%D0%81', '%C6' : '%D0%96', '%C7' : '%D0%97', '%C8' : '%D0%98', '%C9' : '%D0%99', '%CA' : '%D0%9A', '%CB' : '%D0%9B', '%CC' : '%D0%9C', '%CD' : '%D0%9D', '%CE' : '%D0%9E', '%CF' : '%D0%9F', '%D1' : '%D0%A1', '%D2' : '%D0%A2', '%D3' : '%D0%A3', '%D4' : '%D0%A4', '%D5' : '%D0%A5', '%D6' : '%D0%A6', '%D7' : '%D0%A7', '%D8' : '%D0%A8', '%D9' : '%D0%A9', '%DA' : '%D0%AA', '%DB' : '%D0%AB', '%DC' : '%D0%AC', '%DD' : '%D0%AD', '%DE' : '%D0%AE', '%DF' : '%D0%AF', '%E0' : '%D0%B0', '%E1' : '%D0%B1', '%E2' : '%D0%B2', '%E3' : '%D0%B3', '%E4' : '%D0%B4', '%E5' : '%D0%B5', '%B8' : '%D1%91', '%E6' : '%D0%B6', '%E7' : '%D0%B7', '%E8' : '%D0%B8', '%E9' : '%D0%B9', '%EA' : '%D0%BA', '%EB' : '%D0%BB', '%EC' : '%D0%BC', '%ED' : '%D0%BD', '%EE' : '%D0%BE', '%EF' : '%D0%BF', '%F0' : '%D1%80', '%F1' : '%D1%81', '%F2' : '%D1%82', '%F3' : '%D1%83', '%F4' : '%D1%84', '%F5' : '%D1%85', '%F6' : '%D1%86', '%F7' : '%D1%87', '%F8' : '%D1%88', '%F9' : '%D1%89', '%FA' : '%D1%8A', '%FB' : '%D1%8B', '%FC' : '%D1%8C', '%FD' : '%D1%8D', '%FE' : '%D1%8E', '%FF' : '%D1%8F' };

function convert(str) {
    // Symbol code in cp1251 (hex) : symbol code in utf8)
    return str.replace(
        /%.{2}/g,
        function($0) {
            return map[$0] || $0;
        });
}

function decode(fn,  str) {
    var decoded = '';

    // Try/catch block for getting the encoding of the source string.
    // Error is thrown if a non-UTF8 string is input.
    // If the string was not decoded, it is returned without changes.
    try {
        decoded = fn(str);
    } catch (e1) {
        try {
            decoded = fn(convert(str));
        } catch (e2) {
            decoded = str;
        }
    }

    return decoded;
}

provide(/** @exports */{
    /**
     * Decodes URI string
     * @param {String} str
     * @returns {String}
     */
    decodeURI : function(str) {
        return decode(decodeURI,  str);
    },

    /**
     * Decodes URI component string
     * @param {String} str
     * @returns {String}
     */
    decodeURIComponent : function(str) {
        return decode(decodeURIComponent,  str);
    }
});

});