HEX为Base64转换为JavaScript [英] HEX to Base64 converter for JavaScript

问题描述

任何人都知道的JavaScript code的一个好片断的转换 HEX EN codeD字符串为的base64 EN codeD字符串？

解决方案

 如果（！window.atob）{
  VAR tableStr =ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 + /;
  变种表= tableStr.split（）;  window.atob =功能的（Base64）{
    如果（/(=[^=]+|={3,})$/.test(base64））抛出新的错误（字符串包含无效字符）;
    的base64 = base64.replace（/ = /克，）;
    变种N = base64.length＆安培; 3;
    如果（N === 1）抛出新的错误（字符串包含无效字符）;
    对于（VAR I = 0，J = 0，len个= base64.length / 4，仓位= []; I＆LT; LEN ++我）{
      VAR一个= tableStr.indexOf（的base64 [J ++] ||A），B = tableStr.indexOf（的base64 [J ++] ||A）;
      变种C = tableStr.indexOf（的base64 [J ++] ||A），D = tableStr.indexOf（的base64 [J ++] ||A）;
      如果（（A | B | C | D）℃下）抛出新的错误（字符串包含无效字符）;
      仓[bin.length] =（（A＆下; 2）|（B个→4））及255;
      仓[bin.length] =（（b将; 4;）|（c取代;＆→2））及255;
      仓[bin.length] =（（℃下6;）| D）及255;
    };
    返回String.fromChar code.apply（NULL，宾）.substr（0，bin.length + N  -  4）;
  };  window.btoa =功能（斌）{
    对于（VAR I = 0，J = 0，LEN = bin.length / 3，基数64 = []; I＆LT; LEN ++我）{
      VAR一个= bin.char $ C $猫（J ++），B = bin.char $ C $猫（J ++），C = bin.char $ C $猫（J ++）;
      如果（（A | B | C）＆GT; 255）抛出新的错误（字符串包含无效字符）;
      的base64 [base64.length] =表[A＆GT;＆GT; 2] +表[（（一个或下; 4;）及63）| （B个→4）] +
                              （isNaN（二）=：表[（（b将; 2）及63）|（c取代;→6）]）+
                              （？isNaN（B + C）=：表[C和63]）;
    }
    返回base64.join（）;
  };}功能hexToBase64（STR）{
  返回BTOA（String.fromChar code.apply（NULL，
    str.replace（/ \\ r | \\ N /克，）.replace（？/（[\\ DA-FA-F] {2}）/克，0X $ 1）.replace（/ + $ /， ）。分裂（ ））
  ）;
}功能base64ToHex（STR）{
  对于（VAR I = 0，仓位= ATOB（str.replace（/ [\\ r \\ n] + $ /，）），十六进制= []; I＆LT; bin.length ++我）{
    VAR TMP = bin.char $ C $猫（I）的ToString（16）;
    如果（tmp.length === 1）TMP =0+ TMP;
    十六进制[hex.length] = tmp目录;
  }
  返回hex.join（）;
}
 

Anyone know of a good snippet of JavaScript code to convert HEX encoded strings to base64 encoded strings?

解决方案

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(" ");
}

这篇关于HEX为Base64转换为JavaScript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！