Code-Bin #659 - JavaScript Encode and Decode URL

JavaScript Encode and Decode URL
Posted by: Eddie | June 1, 2010 @ 3:08am

Javascript Code

// public method for url decoding
        decode: function(string) {
            return this._utf8_decode(unescape(string));
        },

// private method for UTF-8 encoding
        _utf8_encode: function(string) {
            string = string.replace(/\r\n/g, "\n");
            var utftext = "";

for (var n = 0; n < string.length; n++) {

var c = string.charCodeAt(n);

if (c < 128) {
                    utftext += String.fromCharCode(c);
                }
                else if ((c > 127) && (c < 2048)) {
                    utftext += String.fromCharCode((c >> 6) | 192);
                    utftext += String.fromCharCode((c & 63) | 128);
                }
                else {
                    utftext += String.fromCharCode((c >> 12) | 224);
                    utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                    utftext += String.fromCharCode((c & 63) | 128);
                }

}

return utftext;
        },

// private method for UTF-8 decoding
        _utf8_decode: function(utftext) {
            var string = "";
            var i = 0;
            var c = c1 = c2 = 0;

while (i < utftext.length) {

c = utftext.charCodeAt(i);

if (c < 128) {
                    string += String.fromCharCode(c);
                    i++;
                }
                else if ((c > 191) && (c < 224)) {
                    c2 = utftext.charCodeAt(i + 1);
                    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                    i += 2;
                }
                else {
                    c2 = utftext.charCodeAt(i + 1);
                    c3 = utftext.charCodeAt(i + 2);
                    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 ^ 63));
                    i += 3;
                }
            }
            return string;
        }
    }
 
</script>

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