Question

我正在尝试从我的C＃代码中的外部应用程序调用api。（.Net核心2.2）我为此使用HttpClient。当我尝试将Expires添加到标头时，它在被调用时已从请求中删除（我通过Fiddler进行了检查）。我以类似的方式添加了身份验证令牌，并且该令牌已正确添加到标头中。

我从api中收到401错误。

以下是我的代码：

      HttpClient client = new HttpClient();
            var req = new HttpRequestMessage(HttpMethod.Get, requestUri.Uri);
            var xml = new MediaTypeWithQualityHeaderValue("application/xml");
            var json = new MediaTypeWithQualityHeaderValue("application/json", 0.8);

            req.Headers.Accept.Clear();           
            req.Headers.Accept.Add(json);



            // First try
            //req.Headers.TryAddWithoutValidation("Authorization", "H** ********:MApmTuFFV5nZJOg+i5gRBPkM**0=");
            //req.Headers.TryAddWithoutValidation("Expires", "10/02/19 10:36:33 AM UTC");

            // Second try
            //client.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "H** ********:MApmTuFFV5nZJ**+i5gRBPkM**0=");
            //client.DefaultRequestHeaders.TryAddWithoutValidation("Expires", "10/02/19 10:36:33 AM UTC");

            // Third try
            //req.Headers.Authorization = new AuthenticationHeaderValue("Authorization", "H** ********:MApmTuFFV5nZJOg+i5gRBPkM**0=");
            // req.Headers.Add("Expires", "10/02/19 10:36:33 AM UTC");

             try
             {
                using (HttpResponseMessage res = await client.SendAsync(req))
                 {
                    response.ResponseStatusCode = res.StatusCode;
                    response.ResponseStatusDescription = string.Format("HttpStatusCode: {0} \n StatusDescription: {1}", res.StatusCode.ToString(), res.StatusCode);

                        using (var reader = new StreamReader(await res.Content.ReadAsStreamAsync()))
                        {
                            response.ResponseContent = reader.ReadToEnd();
                        }

                }
            }
            catch (Exception ex)
            {
            }

使用HttpWebRequest完成了api调用，并且效果很好，当我将其更改为HttpClient时，得到了401 UnAuthorized作为api的响应：较早的代码是：


string uri = "http://someservice.com"
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);

            req.Method = "Get";
            req.Accept = "application/json";
            req.KeepAlive = true;

                req.Headers[HttpRequestHeader.Expires] = "10/02/19 10:36:33 AM UTC";
                req.Headers[HttpRequestHeader.Authorization] = "H** ********:MApmTuFFV5nZJ**+i5gRBPkM**0=";


            try
            {
                using (HttpWebResponse res = (HttpWebResponse)req.GetResponse())
                {
                    response.ResponseStatusCode = res.StatusCode;
                    response.ResponseStatusDescription = string.Format("HttpStatusCode: {0} \n StatusDescription: {1}", res.StatusCode.ToString(), res.StatusDescription);

                        using (var reader = new StreamReader(res.GetResponseStream()))
                        {
                            response.ResponseContent = reader.ReadToEnd();
                        }                    
                }
            }

有人可以指出我的方法中的问题吗？

如何在C＃中将Expires添加到HttpClient的HttpHeader中？

0 个答案: