Javascript ArrayBuffer到Hex [英] Javascript ArrayBuffer to Hex

问题描述

我有一个Javascript ArrayBuffer，我希望将其转换为十六进制字符串。

I've got a Javascript ArrayBuffer that I would like to be converted into a hex string.

任何人都知道我可以调用的函数或预先编写的函数函数已经存在吗？

Anyone knows of a function that I can call or a pre written function already out there?

我只能找到arraybuffer到字符串函数，但我想要数组缓冲区的hexdump。

I have only been able to find arraybuffer to string functions, but I want the hexdump of the array buffer instead.

推荐答案

function buf2hex(buffer) { // buffer is an ArrayBuffer
  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
}

// EXAMPLE:
const buffer = new Uint8Array([ 4, 8, 12, 16 ]).buffer;
console.log(buf2hex(buffer)); // = 04080c10

此功能分为四个步骤：

1. 将缓冲区转换为数组。


2. 对于每个 x 数组，它将该元素转换为十六进制字符串（例如， 12 变为 c ）。 / li>
   
3. 然后它需要那个十六进制字符串并用零填充它（例如， c 变为 0c ）。


4. 最后，它获取所有十六进制值并将它们连接成一个字符串。

1. Converts the buffer into an array.
2. For each x the array, it converts that element to a hex string (e.g., 12 becomes c).
3. Then it takes that hex string and left pads it with zeros (e.g., c becomes 0c).
4. Finally, it takes all of the hex values and joins them into a single string.

下面是另一个更容易理解的更长的实现，但基本上做同样的事情：

Below is another longer implementation that is a little easier to understand, but essentially does the same thing:

function buf2hex(buffer) { // buffer is an ArrayBuffer
  // create a byte array (Uint8Array) that we can use to read the array buffer
  const byteArray = new Uint8Array(buffer);
  
  // for each element, we want to get its two-digit hexadecimal representation
  const hexParts = [];
  for(let i = 0; i < byteArray.length; i++) {
    // convert value to hexadecimal
    const hex = byteArray[i].toString(16);
    
    // pad with zeros to length 2
    const paddedHex = ('00' + hex).slice(-2);
    
    // push to array
    hexParts.push(paddedHex);
  }
  
  // join all the hex values of the elements into a single string
  return hexParts.join('');
}

// EXAMPLE:
const buffer = new Uint8Array([ 4, 8, 12, 16 ]).buffer;
console.log(buf2hex(buffer)); // = 04080c10

这篇关于Javascript ArrayBuffer到Hex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！