base64位字符串加密解密

 

var keyStr = "ABCDEFGHIJKLMNOP" +
  "QRSTUVWXYZabcdef" +
  "ghijklmnopqrstuv" +
  "wxyz0123456789+/" +
  "=";
function encode64(input) {//编码
  input = escape(input);
  var output = "";
  var chr1, chr2, chr3 = "";
  var enc1, enc2, enc3, enc4 = "";
  var i = 0;
  do {
    chr1 = input.charCodeAt(i++);
    chr2 = input.charCodeAt(i++);
    chr3 = input.charCodeAt(i++);
    enc1 = chr1 >> 2;
    enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
    enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
    enc4 = chr3 & 63;
    if (isNaN(chr2)) {
      enc3 = enc4 = 64;
    }
    else if (isNaN(chr3)) {
      enc4 = 64;
    }
    output = output +
      keyStr.charAt(enc1) +
      keyStr.charAt(enc2) +
      keyStr.charAt(enc3) +
      keyStr.charAt(enc4);
    chr1 = chr2 = chr3 = "";
    enc1 = enc2 = enc3 = enc4 = "";
  } while (i < input.length);
  return output;
}

function decode64(input) {//解码
  var output = "";
  var chr1, chr2, chr3 = "";
  var enc1, enc2, enc3, enc4 = "";
  var i = 0;
  // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
  var base64test = /[^A-Za-z0-9\+\/\=]/g;
  if (base64test.exec(input)) {
    alert("There were invalid base64 characters in the input text.\n" +
      "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" +
      "Expect errors in decoding.");
  }
  input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
  do {
    enc1 = keyStr.indexOf(input.charAt(i++));
    enc2 = keyStr.indexOf(input.charAt(i++));
    enc3 = keyStr.indexOf(input.charAt(i++));
    enc4 = keyStr.indexOf(input.charAt(i++));
    chr1 = (enc1 << 2) | (enc2 >> 4);
    chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
    chr3 = ((enc3 & 3) << 6) | enc4;
    output = output + String.fromCharCode(chr1);
    if (enc3 != 64) {
      output = output + String.fromCharCode(chr2);
    }
    if (enc4 != 64) {
      output = output + String.fromCharCode(chr3);
    }
    chr1 = chr2 = chr3 = "";
    enc1 = enc2 = enc3 = enc4 = "";
  } while (i < input.length);
  return unescape(output);
}

　　

let str = [{ "orderType": "instance-buy", "regionId": "cn-beijing", "commodity": { "zoneId": "cn-beijing-a", "instanceType": "ecs.n4.xlarge", "ioOptimized": true, "networkType": "vpc", "internetChargeType": "PayByTraffic", "internetMaxBandwidthOut": 100, "systemDisk": { "category": "cloud_efficiency", "size": 120 }, "dataDisks": [], "priceUnit": "Year", "period": 1, "amount": 3 } }, { "orderType": "traffic-bandwidth", "regionId": "cn-beijing" }];

对象在使用前要先转成字符串

str = JSON.stringify(str)

console.log(encode64(str)
)