由於WebRequestHandler部署到Azure後，Web應用程序崩潰

Question

我有一個從其他服務獲取數據的API。下面的代碼工作在本地IIS很大：

if (model.Phone[0] != '+') 
     { 
      model.Phone = "+" + model.Phone; 
     } 

     string data = Newtonsoft.Json.JsonConvert.SerializeObject(new { ID = Guid.NewGuid(), Phone = model.Phone}); 

     if (!string.IsNullOrEmpty(model.Email)) 
     { 
      data = Newtonsoft.Json.JsonConvert.SerializeObject(new { ID = Guid.NewGuid(), Phone = model.Phone, Email = model.Email }); 
     } 

     logger.Debug("GetDataFromSupplier before try"); 

     try 
     { 
      WebRequestHandler handler = new WebRequestHandler(); 
      X509Certificate2 certificate = GetMyX509Certificate(); 
      ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true; 
      handler.ClientCertificates.Add(certificate); 
      HttpClient client = new HttpClient(handler); 
      var content = new StringContent(data, Encoding.UTF8, "application/json"); 
      var request = client.PostAsync(API_URL, content); 
      var result = request.Result; 
      return result; 
     } catch (Exception ex) 
     { 
      logger.Debug($"GetDataFromSupplier in catch: {ex.Message}"); 
      var message = new HttpResponseMessage(HttpStatusCode.BadRequest); 
      message.Content = new StringContent(ex.Message); 
      return message; 
     } 

但我已經部署了此代碼後到Azure上這行代碼的會議遊：

WebRequestHandler handler = new WebRequestHandler(); 

客戶端應用程序獲取502 HTTP錯誤。我試圖增加網絡服務器的RAM。 catch塊甚至沒有運行。什麼會導致這個問題？

Answer 1

查看WebRequestHandler https://msdn.microsoft.com/en-us/library/system.net.http.webrequesthandler(v=vs.110).aspx的文檔，它可能不是此處使用的最佳組件。

也許，試試用HttpClient。 https://msdn.microsoft.com/en-us/library/system.net.http.httpclient(v=vs.110).aspx因爲WebRequestHandler更適用於桌面應用程序。

既然你提到IIS，我猜你沒有建立一個桌面應用程序。