短链工具（本地）

复制import hashlib
import base64

# 生成短链：对原始URL取MD5前6位作为短码
original_url = "https://example.com/long/path?q=1"
# 取MD5摘要的前6个字节，编码为base64短字符串
short_code = base64.urlsafe_b64encode(
    hashlib.md5(original_url.encode()).digest()[:6]
).decode().rstrip("=")
short_url = f"https://short.url/{short_code}"
print(short_url)  # 例: https://short.url/AbCdEf

# 解析短链：根据短码查映射表（此处模拟本地字典）
mapping = {short_code: original_url}
resolved = mapping.get(short_code)
print(resolved)  # https://example.com/long/path?q=1

复制package main

import (
	"crypto/md5"
	"encoding/base64"
	"fmt"
)

func main() {
	original := "https://example.com/long/path?q=1"
	// 取MD5前6字节，Base64编码为短码
	hash := md5.Sum([]byte(original))
	code := base64.RawURLEncoding.EncodeToString(hash[:6])
	shortURL := fmt.Sprintf("https://short.url/%s", code)
	fmt.Println(shortURL) // 例: https://short.url/AbCdEf

	// 解析：本地map模拟存储
	store := map[string]string{code: original}
	if resolved, ok := store[code]; ok {
		fmt.Println(resolved) // https://example.com/long/path?q=1
	}
}

复制const crypto = require('crypto');

// 生成短链：MD5前6字节 → base64url
const original = 'https://example.com/long/path?q=1';
const hash = crypto.createHash('md5').update(original).digest();
const code = hash.slice(0, 6).toString('base64url');
const shortURL = `https://short.url/${code}`;
console.log(shortURL); // 例: https://short.url/AbCdEf

// 解析：本地对象模拟存储
const store = { [code]: original };
const resolved = store[code];
console.log(resolved); // https://example.com/long/path?q=1