Base85 也称为 Ascii85，用五个可打印 ASCII 字符表示四个字节。此工具遵循 Adobe 风格的 Ascii85 行为。
Base85 比 Base64 更紧凑，在需要将二进制数据嵌入为可打印文本时很有用。
Hello -> 87cURDZ
<~87cURDZ~> -> Hello// npm install ascii85
const ascii85 = require('ascii85');
const encoded = ascii85.encode(Buffer.from('Hello')).toString();
console.log(encoded);
// Output: 87cURDZ
const decoded = ascii85.decode('87cURDZ').toString();
console.log(decoded);
// Output: Hello
package main
import (
"encoding/ascii85"
"fmt"
)
func main() {
dst := make([]byte, ascii85.MaxEncodedLen(len("Hello")))
n := ascii85.Encode(dst, []byte("Hello"))
encoded := string(dst[:n])
fmt.Println(encoded)
// Output: 87cURDZ
decoded := make([]byte, len("87cURDZ"))
n, _, _ = ascii85.Decode(decoded, []byte("87cURDZ"), true)
fmt.Println(string(decoded[:n]))
// Output: Hello
}
<?php
// composer require tuupola/base85
require 'vendor/autoload.php';
$base85 = new Tuupola\Base85;
$encoded = $base85->encode("Hello");
echo $encoded . "\n";
// Output: 87cURDZ
$decoded = $base85->decode("87cURDZ");
echo $decoded . "\n";
// Output: Hello