/** * 注册命名空间：baidu.endecode */ baidu.namespace.register("baidu.endecode"); /** * 本库提供几个常用方法： * 1、baidu.endecode.uniEncode(text); 将中文进行Unicode编码并输出 * 2、baidu.endecode.base64Encode(text); 将文字进行base64编码并输出 * 3、baidu.endecode.base64Decode(text); 将经过base64编码的文字进行base64解码并输出 * 4、baidu.endecode.utf8Encode(text); 将文字进行utf-8编码并输出 * 5、baidu.endecode.utf8Decode(text); 将经过utf-8编码的文字进行utf-8解码并输出 */ baidu.endecode = (function(){ //base64编码字符集 var _base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; //base64解码字符集 var _base64DecodeChars = new Array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1); /** * 此方法实现中文向Unicode的转码，与Jre中的"native2ascii"命令一样 * @param {String} text 需要进行转码的字符串 * @return {String} Unicode码 */ var _uniEncode = function(text){ text = escape(text.toString()).replace(/\+/g, "%2B"); var matches = text.match(/(%([0-9A-F]{2}))/gi); if (matches) { for (var matchid = 0; matchid < matches.length; matchid++) { var code = matches[matchid].substring(1, 3); if (parseInt(code, 16) >= 128) { text = text.replace(matches[matchid], '%u00' + code); } } } text = text.replace('%25', '%u0025').replace(/%/g, "\\"); return text; }; /** * 此方法用于将Unicode码解码为正常字符串 * @param {Object} text */ var _uniDecode = function(text){ text = text.replace(/\\/g, "%").replace('%u0025', '%25'); text = unescape(text.toString().replace(/%2B/g, "+")); var matches = text.match(/(%u00([0-9A-F]{2}))/gi); if (matches) { for (var matchid = 0; matchid < matches.length; matchid++) { var code = matches[matchid].substring(1, 3); var x = Number("0x" + code); if (x >= 128) { text = text.replace(matches[matchid], code); } } } text = unescape(text.toString().replace(/%2B/g, "+")); return text; }; /** * 此方法用于将文字进行UTF-8编码 * @param {Object} str 源码 * @return {String} UTF-8码 */ var _utf8Encode = function(str) { var out, i, len, c; out = ""; len = str.length; for(i = 0; i < len; i++) { c = str.charCodeAt(i); if ((c >= 0x0001) && (c <= 0x007F)) { out += str.charAt(i); } else if (c > 0x07FF) { out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F)); out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } else { out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F)); out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F)); } } return out; }; /** * 此方法用于将文字进行UTF-8解码 * @param {Object} str * @return {String} 原文字 */ var _utf8Decode = function(str){ var out, i, len, c; var char2, char3; out = ""; len = str.length; i = 0; while (i < len) { c = str.charCodeAt(i++); switch (c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: // 0xxxxxxx out += str.charAt(i - 1); break; case 12: case 13: // 110x xxxx　 10xx xxxx char2 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); break; case 14: // 1110 xxxx　10xx xxxx　10xx xxxx char2 = str.charCodeAt(i++); char3 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); break; } } return out; }; /** * 此方法用于将文字进行base64编码 * @param {Object} str 源码 * @return {String} base64码 */ var _base64Encode = function(str){ var out, i, len; var c1, c2, c3; len = str.length; i = 0; out = ""; while (i < len) { c1 = str.charCodeAt(i++) & 0xff; if (i == len) { out += _base64EncodeChars.charAt(c1 >> 2); out += _base64EncodeChars.charAt((c1 & 0x3) << 4); out += "=="; break; } c2 = str.charCodeAt(i++); if (i == len) { out += _base64EncodeChars.charAt(c1 >> 2); out += _base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)); out += _base64EncodeChars.charAt((c2 & 0xF) << 2); out += "="; break; } c3 = str.charCodeAt(i++); out += _base64EncodeChars.charAt(c1 >> 2); out += _base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)); out += _base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6)); out += _base64EncodeChars.charAt(c3 & 0x3F); } return out; }; /** * 此方法用于将文字进行base64解码 * @param {Object} str 源码 * @return {String} 源码 */ var _base64Decode = function(str){ var c1, c2, c3, c4; var i, len, out; len = str.length; i = 0; out = ""; while (i < len) { /* c1 */ do { c1 = _base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while (i < len && c1 == -1); if (c1 == -1) break; /* c2 */ do { c2 = _base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while (i < len && c2 == -1); if (c2 == -1) break; out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4)); /* c3 */ do { c3 = str.charCodeAt(i++) & 0xff; if (c3 == 61) return out; c3 = _base64DecodeChars[c3]; } while (i < len && c3 == -1); if (c3 == -1) break; out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2)); /* c4 */ do { c4 = str.charCodeAt(i++) & 0xff; if (c4 == 61) return out; c4 = _base64DecodeChars[c4]; } while (i < len && c4 == -1); if (c4 == -1) break; out += String.fromCharCode(((c3 & 0x03) << 6) | c4); } return out; }; return { uniEncode : _uniEncode, uniDecode : _uniDecode, base64Encode : _base64Encode, base64Decode : _base64Decode, utf8Encode : _utf8Encode, utf8Decode : _utf8Decode }; })();