base64加密

- 日理万妓 2022-12-20 01:56 154阅读 0赞

// base64.js
    var Base64 = {
      _keyStr: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
      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)
            n++
          } 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
      }
    }
    export default Base64
    // base64.js

// 页面使用
    import base64 from './base64.js'
    
    id = base64.encode(String(id))