有人知道一段很好的JavaScript代码片段可以将HEX编码的字符串转换为base64编码的字符串吗?

===============>>#1 票数:57

如果您在Node中工作或使用Browserify,则可以使用

var base64String = Buffer.from(hexString, 'hex').toString('base64')

要么

var hexString = Buffer.from(base64String, 'base64').toString('hex')

===============>>#2 票数:23

@dandavis的优秀评论由StackOverflow修改,并且有一些奇怪的隐藏字符。

这是一个班轮:

btoa("a6b580481008e60df9350de170b7e728".match(/\w{2}/g).map(function(a){return String.fromCharCode(parseInt(a, 16));} ).join(""))

要么 :

function hexToBase64(hexstring) {
    return btoa(hexstring.match(/\w{2}/g).map(function(a) {
        return String.fromCharCode(parseInt(a, 16));
    }).join(""));
}

hexToBase64("a6b580481008e60df9350de170b7e728");

两者都回归:

"prWASBAI5g35NQ3hcLfnKA=="

===============>>#3 票数:18 已采纳

if (!window.atob) {
  var tableStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var table = tableStr.split("");

  window.atob = function (base64) {
    if (/(=[^=]+|={3,})$/.test(base64)) throw new Error("String contains an invalid character");
    base64 = base64.replace(/=/g, "");
    var n = base64.length & 3;
    if (n === 1) throw new Error("String contains an invalid character");
    for (var i = 0, j = 0, len = base64.length / 4, bin = []; i < len; ++i) {
      var a = tableStr.indexOf(base64[j++] || "A"), b = tableStr.indexOf(base64[j++] || "A");
      var c = tableStr.indexOf(base64[j++] || "A"), d = tableStr.indexOf(base64[j++] || "A");
      if ((a | b | c | d) < 0) throw new Error("String contains an invalid character");
      bin[bin.length] = ((a << 2) | (b >> 4)) & 255;
      bin[bin.length] = ((b << 4) | (c >> 2)) & 255;
      bin[bin.length] = ((c << 6) | d) & 255;
    };
    return String.fromCharCode.apply(null, bin).substr(0, bin.length + n - 4);
  };

  window.btoa = function (bin) {
    for (var i = 0, j = 0, len = bin.length / 3, base64 = []; i < len; ++i) {
      var a = bin.charCodeAt(j++), b = bin.charCodeAt(j++), c = bin.charCodeAt(j++);
      if ((a | b | c) > 255) throw new Error("String contains an invalid character");
      base64[base64.length] = table[a >> 2] + table[((a << 4) & 63) | (b >> 4)] +
                              (isNaN(b) ? "=" : table[((b << 2) & 63) | (c >> 6)]) +
                              (isNaN(b + c) ? "=" : table[c & 63]);
    }
    return base64.join("");
  };

}

function hexToBase64(str) {
  return btoa(String.fromCharCode.apply(null,
    str.replace(/\r|\n/g, "").replace(/([\da-fA-F]{2}) ?/g, "0x$1 ").replace(/ +$/, "").split(" "))
  );
}

function base64ToHex(str) {
  for (var i = 0, bin = atob(str.replace(/[ \r\n]+$/, "")), hex = []; i < bin.length; ++i) {
    var tmp = bin.charCodeAt(i).toString(16);
    if (tmp.length === 1) tmp = "0" + tmp;
    hex[hex.length] = tmp;
  }
  return hex.join(" ");
}

  ask by Chris Dutrow translate from so

未解决问题?本站智能推荐: