node.js 将 Binary.toString('encode64') 转换回 Binary
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Convert Binary.toString('encode64') back to Binary
提问by ariefbayu
I've seen severaltutorialexplaining how to convert binary image into encode64 representations:
我看过几个教程，解释了如何将二进制图像转换为 encode64 表示：
var image = new Buffer(bl.toString(), 'binary').toString('base64');
My question is, how to return this string representation, back to it's buffer's binary data.
我的问题是，如何返回这个字符串表示，回到它的缓冲区的二进制数据。
回答by tillberg
This question has some helpful info: How to do Base64 encoding in node.js?
这个问题有一些有用的信息：How to do Base64 encoding in node.js?
The Buffer class itself does the conversion:
Buffer 类本身进行转换：
var base64data = Buffer.from('some binary data', 'binary').toString('base64');
console.log(base64data);
// -> 'c29tZSBiaW5hcnkgZGF0YQ=='
var originaldata = Buffer.from(base64data, 'base64');
console.log(originaldata);
// -> <Buffer 73 6f 6d 65 20 62 69 6e 61 72 79 20 64 61 74 61>
console.log(originaldata.toString());
// -> some binary data
回答by Tony Mack
new Bufferis deprecated
new Buffer已弃用
From Binary to base64:
从二进制到 base64：
const base64data = Buffer.from('some binary data', 'binary').toString('base64');
console.log(base64data);
// -> 'c29tZSBiaW5hcnkgZGF0YQ=='
From base64 to binary:
从 base64 到二进制：
const origionalData = Buffer.from('some base64 data', 'base64')
console.log(origionalData)
// -> 'c29tZSBiaW5hcnkgZGF0YQ=='
