80 lines
2.8 KiB
Java
80 lines
2.8 KiB
Java
package com.heyu.api.alibaba;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.UUID;
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public class AliyunCDNAuthA {
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/**
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* 生成阿里云CDN鉴权方式A的加密URL
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*
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* @param filePath 文件路径，以/开头，如 "/video/test.mp4"
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* @param expiresInSeconds 过期时间（从当前算起的秒数）
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* @return 完整的加密URL
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*/
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public static String generateAuthUrl(String privateKey,String domainName,String filePath, long expiresInSeconds) {
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try {
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// 1. 生成时间戳（当前时间 + 过期时间）
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long timestamp = (System.currentTimeMillis() / 1000) + expiresInSeconds;
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// 2. 生成随机数（去掉UUID中的短横线）
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String rand = UUID.randomUUID().toString().replace("-", "");
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// 3. 设置uid为0
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String uid = "0";
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// 4. 计算md5hash
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String md5hash = calculateMd5Hash(privateKey,filePath, timestamp, rand, uid);
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// 5. 构建鉴权URL
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return "http://" + domainName + filePath +
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"?auth_key=" + timestamp + "-" + rand + "-" + uid + "-" + md5hash;
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} catch (Exception e) {
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throw new RuntimeException("生成鉴权URL失败", e);
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}
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}
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/**
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* 计算MD5哈希值
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*/
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private static String calculateMd5Hash(String privateKey,String filePath, long timestamp, String rand, String uid)
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throws NoSuchAlgorithmException {
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// 构造签名字符串
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String signString = filePath + "-" + timestamp + "-" + rand + "-" + uid + "-" + privateKey;
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// 计算MD5
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MessageDigest md = MessageDigest.getInstance("MD5");
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byte[] digest = md.digest(signString.getBytes());
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// 转换为十六进制字符串
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StringBuilder hexString = new StringBuilder();
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for (byte b : digest) {
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String hex = Integer.toHexString(0xff & b);
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if (hex.length() == 1) {
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hexString.append('0');
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}
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hexString.append(hex);
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}
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return hexString.toString();
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}
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/**
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* 使用示例
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*/
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public static void main(String[] args) {
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// 初始化鉴权对象
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String privateKey = "heyuquyixiao123456"; // 替换为你的密钥
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String domainName = "heyuimage.ihzhy.com"; // 替换为你的CDN域名
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// 生成鉴权URL，有效时间30分钟（1800秒）
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String filePath = "/ccc.jpeg";
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String authUrl = AliyunCDNAuthA.generateAuthUrl(privateKey,domainName,filePath, 1800);
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System.out.println("生成的鉴权URL: " + authUrl);
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}
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} |