为何小程序流程裂变_JS完成的base64加密解密操作示例

JS实现的base64加密解密操作示例       这篇文章主要介绍了JS实现的base64加密解密操作,结合实例形式分析了基于javascript的base64加密与解密函数定义与使用相关操作技巧,需要的朋友可以参考下
var Base64 = { _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/=", encode: function(e) { var t = ""; var n, r, i, s, o, u, a; var f = 0; e = Base64._utf8_encode(e); while (f e.length) { n = e.charCodeAt(f++); r = e.charCodeAt(f++); i = e.charCodeAt(f++); s = n 2; o = (n 3) 4 | r 4; u = (r 15) 2 | i 6; a = i 63; if (isNaN(r)) { u = a = 64 } else if (isNaN(i)) { a = 64 t = t + this._keyStr.charAt(s) + this._keyStr.charAt(o) + this._keyStr.charAt(u) + this._keyStr.charAt(a) return t decode: function(e) { var t = ""; var n, r, i; var s, o, u, a; var f = 0; e=e.replace(/[^A-Za-z0-9+/=]/g,""); while (f e.length) { s = this._keyStr.indexOf(e.charAt(f++)); o = this._keyStr.indexOf(e.charAt(f++)); u = this._keyStr.indexOf(e.charAt(f++)); a = this._keyStr.indexOf(e.charAt(f++)); n = s 2 | o 4; r = (o 15) 4 | u 2; i = (u 3) 6 | a; t = t + String.fromCharCode(n); if (u != 64) { t = t + String.fromCharCode(r) if (a != 64) { t = t + String.fromCharCode(i) t = Base64._utf8_decode(t); return t _utf8_encode: function(e) { e = e.replace(/rn/g, "n"); var t = ""; for (var n = 0; n e.length; n++) { var r = e.charCodeAt(n); if (r 128) { t += String.fromCharCode(r) } else if (r 127 r 2048) { t += String.fromCharCode(r 6 | 192); t += String.fromCharCode(r 63 | 128) } else { t += String.fromCharCode(r 12 | 224); t += String.fromCharCode(r 6 63 | 128); t += String.fromCharCode(r 63 | 128) return t _utf8_decode: function(e) { var t = ""; var n = 0; var r = c1 = c2 = 0; while (n e.length) { r = e.charCodeAt(n); if (r 128) { t += String.fromCharCode(r); } else if (r 191 r 224) { c2 = e.charCodeAt(n + 1); t += String.fromCharCode((r 31) 6 | c2 63); n += 2 } else { c2 = e.charCodeAt(n + 1); c3 = e.charCodeAt(n + 2); t += String.fromCharCode((r 15) 12 | (c2 63) 6 | c3 63); n += 3 return t // 定义字符串 var string = 'Hello World!'; // 加密 var encodedString = Base64.encode(string); console.log(encodedString); // 输出: "SGVsbG8gV29ybGQh" // 解密 var decodedString = Base64.decode(encodedString); console.log(decodedString); // 输出: "Hello World!" /script /body /html

运行结果:

凡科抠图:这里再推荐几款加密解密相关在线工具供大家参考使用:

在线编码转换工具(utf-8/utf-32/Punycode/Base64):

BASE64编码解码工具:

图片转换为Base64编码在线工具:

更多关于JavaScript相关内容可查看本站专题:《》、《》、《》、《》、《》及《》

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