统一身份认证服务 源码（客户端）

        /// <summary>
        /// 参考说明：http请求统一身份认证服务
        /// </summary>
        /// <param name="address">服务地址，服务地址参考统一身份认证服务API页面</param>
        /// <param name="method">HTTP 请求方法</param>
        /// <param name="paramObj">HTTP POST 请求时，传入对象参数</param>
        /// <returns>远程统一认证服务响应消息</returns>
        private string HttpRequest(string address, EnumHttpMethod method, string paramObj)
        {
            using (WebClient httpClient = new WebClient())
            {
                //步骤1：设置统一身份认证服务的服务地址
                httpClient.BaseAddress = IOVAuthrizeBaseUri;
                //步骤2：HTTP 请求的标头中需要添加“Authorization”，参考如下：
                httpClient.Headers.Add("Content-Type", "application/json");
                httpClient.Headers.Add("Authorization", GetAuthorization(AppID, AppSecret));
                try
                {
                    //步骤3：请求远程资源
                    string response = string.Empty;
                    if (method == EnumHttpMethod.POST)
                    {
                        //序列化对象参数
                        var jsonObj = JsonConvert.SerializeObject(paramObj);
                        //编码
                        byte[] postData = Encoding.UTF8.GetBytes(jsonObj);
                        //POST请求
                        byte[] responseData = httpClient.UploadData(address, "POST", postData); // 得到返回字符流
                        response = Encoding.UTF8.GetString(responseData);// 解码 
                    }
                    else
                    {
                        //特别说明：address 在GET请求形势下，如果有参数address示例：api/Token/Refresh?accessToken={accessToken}
                        byte[] responseData = httpClient.DownloadData(address); // 得到返回字符流
                        response = Encoding.UTF8.GetString(responseData);// 解码 
                    }
                    return response;
                }
                catch (WebException ex)
                {
                    //获取统一认证服务返回的信息
                    var res = (HttpWebResponse)ex.Response;
                    //HTTP状态401：身份认证不通过
                    if (res.StatusCode == HttpStatusCode.Unauthorized)
                    {
                        //未授权，尝试检查步骤2。错误原因(1)：未添加“Authorization”；错误原因(2)：应用ID或应用秘钥不正确。
                        return string.Empty;
                    }
                    else
                    {
                        //获取详细的错误信息，这时可能统一身份认证服务出现内部异常或者客户端出现内部异常，可使用
                        //下面代码抛出异常明细
                        StreamReader sr = new StreamReader(res.GetResponseStream());
                        var strHtml = sr.ReadToEnd();
                        throw new Exception(strHtml);
                    }
                }
            }
        }
        /// <summary>
        /// 获取Authorization标头值
        /// </summary>
        /// <param name="appID">统一认证服务颁发的应用ID</param>
        /// <param name="appSecret">统一认证服务颁发的应用秘钥</param>
        /// <returns>标头值</returns>
        private string GetAuthorization(string appID, string appSecret)
        {
            var authorization = string.Format("{0}:{1}", appID, appSecret);
            return "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(authorization));
        }
        /// <summary>
        /// HTTP 请求方法
        /// </summary>
        public enum EnumHttpMethod
        {
            POST,
            GET
        }