自己写的百度云推送小功能，按照api上一步一步写的，但是就是不对，有没有了解百度推送的大神帮我看一下啊

[lulupiaoxu]

以前百度推送2.0版本的时候我写了一个是可以用的，现在它更新成3.0了，我在以前的基础上改了下，但是就是不对了，折腾2天了，就这么几段代码，查看了无数遍了，实在是没辙了，求大神帮我看一下啊
http://push.baidu.com/doc/restapi/sdk_developer这是百度的文档
现在就是报错
{"request_id":1107529284,"error_code":30603,"error_msg":"Authentication Failed"}
说是什么权限验证失败。。。。

 
class Program
    {
        static void Main(string[] args)
        {
            string token = "836349605809985011";
            BaiduPush.Send(token, "test", "1");
        }
    }

 public class BaiduPush
    {
        private const string url = "http://api.tuisong.baidu.com/rest/3.0/push/single_device";
        private const string apikey = "FebUmftyzqxOgoR4aoOoBdBk";
        private const string secret_key = "TZwIgfXZQ8hF81f1UinCTq7GG5hIW6p6";
         
        public static void Send(string token, string msg, string type)
        {
            WebClient webClient = new WebClient();
            webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
            webClient.Headers.Add("User-Agent", "BCCS_SDK/3.0 (Darwin; Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64; x86_64) PHP/5.6.3 (Baidu Push Server SDK V3.0.0 and so on..) cli/Unknown ZEND/2.6.0");
            try
            {
                byte[] response = webClient.UploadData(url, "POST", StructData(token, msg, type));
            }
            catch (WebException ex)
            {
                Stream stream = ex.Response.GetResponseStream();
                byte[] bs = new byte[1024];
                int index = 0;
                int b;
                while ((b = stream.ReadByte()) > 0)
                {
                    bs[index++] = (byte)b;
                }
                stream.Close();
                var ss = Encoding.UTF8.GetString(bs, 0, index);
            }
        }
        /// <summary>
        /// 参数
        /// </summary>
        /// <param name="token"></param>
        /// <param name="msg"></param>
        /// <param name="type"></param>
        /// <returns></returns>
        private static byte[] StructData(string token, string msg, string type)
        {
            DateTime utcNow = DateTime.UtcNow;
            DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0);
            uint timestamp = (uint)(utcNow - epoch).TotalSeconds;
            uint expires = (uint)(utcNow.AddDays(1) - epoch).TotalSeconds; //一天后过期

            Dictionary<string, string> dic = new Dictionary<string, string>();
            dic.Add("apikey", apikey);
            dic.Add("timestamp", timestamp.ToString());
            dic.Add("expires", expires.ToString());
            dic.Add("device_type", "3");  //3：android 4：iOS

            dic.Add("channel_id", token);
            dic.Add("msg_type", "1");  //取值如下：0：消息；1：通知。默认为0
            dic.Add("msg", "{\"title\":\"hello\",\"description\":\"" + msg + "\",\"custom_content\":{\"ClassName\":\"igs.android.healthsleep.MainActivity\",\"PushMessageType\":" + type + "}}");

            dic.Add("sign", StructSign("POST", url, dic, secret_key));

            StringBuilder sb = new StringBuilder();
            foreach (var d in dic)
            {
                sb.Append(d.Key + "=" + d.Value + "&");
            }
            sb.Remove(sb.Length - 1, 1);
            return Encoding.UTF8.GetBytes(sb.ToString());
        } 
        /// <summary>
        /// 构建Sign
        /// </summary>
        /// <param name="httpMethod"></param>
        /// <param name="url"></param>
        /// <param name="dic"></param>
        /// <param name="secret_key"></param>
        /// <returns></returns>
        private static string StructSign(string httpMethod, string url, Dictionary<string, string> dic, string secret_key)
        {
            //按key正序
            dic = dic.OrderBy(p => p.Key).ToDictionary(p => p.Key, p => p.Value);
            StringBuilder sb = new StringBuilder();
            //构建键值对
            foreach (var d in dic)
            {
                sb.Append(d.Key + "=" + d.Value);
            }
            string sign = httpMethod + url + sb + secret_key;
            //url编码
            sign = sign.UrlEncode();
            //将编码后替换的字符大写，这地方是个坑。。。
            char[] cs = new char[sign.Length];
            for (int i = 0; i < sign.Length; i++)
            {
                cs[i] = sign[i];
                if (sign[i] == '%')
                {
                    cs[++i] = Convert.ToChar(sign[i].ToString().ToUpper());
                    cs[++i] = Convert.ToChar(sign[i].ToString().ToUpper());
                }
            }
            //MD5加密
            return new string(cs).MD5();
        }
    }

/// <summary>
    /// 扩展方法
    /// </summary>
    public static class ExtendMethod
    {
        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string MD5(this string str)
        {
            byte[] bs = new MD5CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(str));
            return BitConverter.ToString(bs).Replace("-", "");
        }
        /// <summary>
        /// url编码
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string UrlEncode(this string str)
        {
            str = System.Web.HttpUtility.UrlEncode(str, Encoding.UTF8);
            /*
             * 不知道为什么微软要把空格编码为+，浏览器不认识啊
             * 只能在这里手动替换下了
             * */
            return str.Replace("+", "%20");
        }
    }

[lulupiaoxu]

引用 1 楼 xdashewan 的回复:

可能是用户认证错误，你的token是否不正确或者过期都有可能导致

晕，找见原因了，原来是sign签名字符串MD5值要小写。。。。百度的文档里根本提都没提，一个大公司的api竟然这么马虎。。真心是无语了

[xdashewan]

可能是用户认证错误，你的token是否不正确或者过期都有可能导致

[u012903992]

你好 同样碰见这样的问题 究竟是要大写还是小写呢