在javascript中将十六进制字符串转换为base64

问题描述：

现在我有一个文件的MD5十六进制摘要字符串，我想将其转换为base64，以便在上传时使用Content-MD5 HTTP标头。

Now I have a string of a MD5 hex digest for a file, and I want to convert it to base64 in order to use the Content-MD5 HTTP header when uploading it.

任何帮助都将不胜感激

答

var hexArray = myHexString
    .replace(/\r|\n/g, "")
    .replace(/([\da-fA-F]{2}) ?/g, "0x$1 ")
    .replace(/ +$/, "")
    .split(" ");
var byteString = String.fromCharCode.apply(null, hexArray);
var base64string = window.btoa(byteString);

请参阅此处了解btoa文档： https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/btoa

See here for btoa docs: https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/btoa

也适用于polyfill： https://stackoverflow.com/a/23190164/275501

Also for polyfill: https://stackoverflow.com/a/23190164/275501

在javascript中将十六进制字符串转换为base64

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