问云点播-拉取事件通知|确认时间通知,身份认证失败，用户身份验证失败？

public String eventParam(String action) {
        // 拼装参数
        TreeMap<String, Object> params = new TreeMap<>();
        params.put("Action", action);
        params.put("Region", "bj");
        params.put("Timestamp", System.currentTimeMillis() / 1000);
        params.put("Nonce", new Random().nextInt(java.lang.Integer.MAX_VALUE));
        params.put("SecretId", secretId);
        // 整理参数
        String signature = getSignature(params);

        String pullGet = SignatureUtil.getStringToSign("GET", "vod.api.qcloud.com/v2/index.php", params);

        String substring = pullGet.substring(pullGet.indexOf("?"));
        substring += "&Signature=" + signature;
        return substring;
    }

      
public static String sign(String s, String key, String method) throws Exception {
    Mac mac = Mac.getInstance(method);
    SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), mac.getAlgorithm());
    mac.init(secretKeySpec);
    byte[] hash = mac.doFinal(s.getBytes());
    return Base64.encodeBase64String(hash);
}

public static String getStringToSign(String method, String endpoint, TreeMap<String, Object> params) {
    StringBuilder s2s = new StringBuilder();
    s2s.append(method).append(endpoint).append("?");
    // 签名时要求对参数进行字典排序，此处用TreeMap保证顺序
    for (String k : params.keySet()) {
        s2s.append(k).append("=").append(params.get(k).toString()).append("&");
    }
    return s2s.toString().substring(0, s2s.length() - 1);
}