escape 和 unescape

原理：对除ASCII字母、数字、标点符号 @ * _ + - . / 以外的其他字符进行编码

escape(string)
escape() 函数可对字符串进行编码，这样就可以在所有的计算机上读取该字符串。

  1. escape("Kyle Thanas!测试")
  2. "Kyle%20Thanas%21%u6D4B%u8BD5"

unescape(string)
unescape() 函数可对通过 escape() 编码的字符串进行解码。

  1. unescape("Kyle%20Thanas%21%u6D4B%u8BD5")
  2. "Kyle Thanas!测试"

encodeURI 和 decodeURI

原理：返回编码为有效的统一资源标识符 (URI) 的字符串，不会被编码的字符：! @ # $ & * ( ) = : / ; ? + ‘

encodeURI(URIstring)
encodeURI() 函数可把字符串作为 URI 进行编码。

  1. encodeURI("https://www.baidu.com/s?wd=编码")
  2. "https://www.baidu.com/s?wd=%E7%BC%96%E7%A0%81"

decodeURI(URIstring)
decodeURI() 函数可对 encodeURI() 函数编码过的 URI 进行解码。

  1. decodeURI("https://www.baidu.com/s?wd=%E7%BC%96%E7%A0%81")
  2. "https://www.baidu.com/s?wd=编码"

encodeURIComponent 和 decodeURIComponent

原理：对URL的组成部分进行个别编码，而不用于对整个URL进行编码

encodeURIComponent(URIstring)
encodeURIComponent() 函数可把字符串作为 URI 组件进行编码。

  1. encodeURIComponent("https://coding.net/u/KyleThanas")
  2. "https%3A%2F%2Fcoding.net%2Fu%2FKyleThanas"

decodeURIComponent(URIstring)
decodeURIComponent() 函数可对 encodeURIComponent() 函数编码的 URI 进行解码。

  1. decodeURIComponent("https%3A%2F%2Fcoding.net%2Fu%2FKyleThanas")
  2. "https://coding.net/u/KyleThanas"

js中的BASE64算法

  1. var Base64 = {
  2.         table: [
  3.             'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
  4.             'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
  5.             'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
  6.             'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
  7.             'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
  8.             'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
  9.             'w', 'x', 'y', 'z', '0', '1', '2', '3',
  10.             '4', '5', '6', '7', '8', '9', '+', '/'
  11.         ],
  12.         UTF16ToUTF8: function (str) {
  13.             var res = [],
  14.                 len = str.length;
  15.             for (var i = 0; i < len; i++) {
  16.                 var code = str.charCodeAt(i);
  17.                 if (code > 0x0000 && code <= 0x007F) {
  18.                     res.push(str.charAt(i));
  19.                 } else if (code >= 0x0080 && code <= 0x07FF) {
  20.                     var byte1 = 0xC0 | ((code >> 6) & 0x1F);
  21.                     var byte2 = 0x80 | (code & 0x3F);
  22.                     res.push(
  23.                         String.fromCharCode(byte1),
  24.                         String.fromCharCode(byte2)
  25.                     );
  26.                 } else if (code >= 0x0800 && code <= 0xFFFF) {
  27.                     var byte1 = 0xE0 | ((code >> 12) & 0x0F);
  28.                     var byte2 = 0x80 | ((code >> 6) & 0x3F);
  29.                     var byte3 = 0x80 | (code & 0x3F);
  30.                     res.push(
  31.                         String.fromCharCode(byte1),
  32.                         String.fromCharCode(byte2),
  33.                         String.fromCharCode(byte3)
  34.                     );
  35.                 } else {}
  36.             }
  37.             return res.join('');
  38.         },
  39.         UTF8ToUTF16: function (str) {
  40.             var res = [],
  41.                 len = str.length;
  42.             var i = 0;
  43.             for (var i = 0; i < len; i++) {
  44.                 var code = str.charCodeAt(i);
  45.                 if (((code >> 7) & 0xFF) == 0x0) {
  46.                     res.push(str.charAt(i));
  47.                 } else if (((code >> 5) & 0xFF) == 0x6) {
  48.                     var code2 = str.charCodeAt(++i);
  49.                     var byte1 = (code & 0x1F) << 6;
  50.                     var byte2 = code2 & 0x3F;
  51.                     var utf16 = byte1 | byte2;
  52.                     res.push(Sting.fromCharCode(utf16));
  53.                 } else if (((code >> 4) & 0xFF) == 0xE) {
  54.                     var code2 = str.charCodeAt(++i);
  55.                     var code3 = str.charCodeAt(++i);
  56.                     var byte1 = (code << 4) | ((code2 >> 2) & 0x0F);
  57.                     var byte2 = ((code2 & 0x03) << 6) | (code3 & 0x3F);
  58.                     utf16 = ((byte1 & 0x00FF) << 8) | byte2
  59.                     res.push(String.fromCharCode(utf16));
  60.                 } else {}
  61.             }
  62.             return res.join('');
  63.         },
  64.         encode: function (str) {
  65.             !str ? '' : 1;
  66.             var utf8 = this.UTF16ToUTF8(str),
  67.                 i = 0,
  68.                 res = [];
  69.             var len = utf8.length;
  70.             while (i < len) {
  71.                 var c1 = utf8.charCodeAt(i++) & 0xFF;
  72.                 res.push(this.table[c1 >> 2]);
  73.                 if (i == len) {
  74.                     res.push(this.table[(c1 & 0x3) << 4]);
  75.                     res.push('==');
  76.                     break;
  77.                 }
  78.                 var c2 = utf8.charCodeAt(i++);
  79.                 if (i == len) {
  80.                     res.push(this.table[((c1 & 0x3) << 4) | ((c2 >> 4) & 0x0F)]);
  81.                     res.push(this.table[(c2 & 0x0F) << 2]);
  82.                     res.push('=');
  83.                     break;
  84.                 }
  85.                 var c3 = utf8.charCodeAt(i++);
  86.                 res.push(this.table[((c1 & 0x3) << 4) | ((c2 >> 4) & 0x0F)]);
  87.                 res.push(this.table[((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6)]);
  88.                 res.push(this.table[c3 & 0x3F]);
  89.             }
  90.             return res.join('');
  91.         },
  92.         decode: function (str) {
  93.             !str ? '' : 1;
  94.             var len = str.length,
  95.                 i = 0,
  96.                 res = [];
  97.             while (i < len) {
  98.                 code1 = this.table.indexOf(str.charAt(i++));
  99.                 code2 = this.table.indexOf(str.charAt(i++));
  100.                 code3 = this.table.indexOf(str.charAt(i++));
  101.                 code4 = this.table.indexOf(str.charAt(i++));
  102.                 c1 = (code1 << 2) | (code2 >> 4);
  103.                 c2 = ((code2 & 0xF) << 4) | (code3 >> 2);
  104.                 c3 = ((code3 & 0x3) << 6) | code4;
  105.                 res.push(String.fromCharCode(c1));
  106.                 code3 != 64 ? res.push(String.fromCharCode(c2)) : 1;
  107.                 code4 != 64 ? res.push(String.fromCharCode(c3)) : 1;
  108.             }
  109.             return this.UTF8ToUTF16(res.join(''));
  110.         }
  111.     };
  112.     var b64 = Base64.encode('KyleThanas,Base64,简书');
  113.     console.log(b64);
  114.     console.log(Base64.decode(b64));

其他的转换

JSON.parse(escape2Html(data));

  1. function escape2Html(str) {
  2.     var arrEntities = {
  3.       'lt': '<',
  4.       'gt': '>',
  5.       'nbsp': ' ',
  6.       'amp': '&',
  7.       'quot': '"'
  8.     };
  9.     return str.replace(/&(lt|gt|nbsp|amp|quot);/ig, function(all, t) {
  10.       return arrEntities[t];
  11.     });
  12.  }

更多编码、算法

sha1
https://kylethanas.coding.me/demo/js/sha1.js
var sha = hex_sha1(navigator.userAgent)
md5
http://kylethanas.coding.me/demo/js/md5.js
var hash = hex_md5(navigator.userAgent);

我是Kylethanas🐏