底層連接已關閉 - API端點調用失敗

我試圖確定爲什麼在使用HTTPS而不是來自Windows Server 2012 R2的HTTP時，對Restful API端點的調用失敗。當我在我的筆記本電腦上本地運行應用程序時（Windows 7），同樣的HTTPS調用起作用。底層連接已關閉 - API端點調用失敗

不幸的是，我不能讓提琴手顯示從Web服務器上的應用程序到API的調用。 試圖枚舉AppContainers列表的AppContainer Loopback Exemption Utility錯誤。服務器也被組策略鎖定，所以我無法關閉防火牆來嘗試解決提琴手問題。

到API的調用是：收到

public Task<HttpResponseMessage> SendAsync(HttpRequestMessage request) 
{ 
    client = new HttpClient(); 

    // removed code for setting ignoreCertErrors and environmentName 

    if (ignoreCertErrors && environmentName.ToUpper() != "PROD") 
      { 
       ServicePointManager.ServerCertificateValidationCallback = delegate { return true; }; 
      } 

    return client.SendAsync(request); 
}

錯誤：

================================================================= Message: The underlying connection was closed: An unexpected error occurred on a send. Stack Trace:
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResultar)

================================================================= Message: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. Stack Trace:
at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)

================================================================= Message: An existing connection was forcibly closed by the remote host Stack Trace:
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)

=================================================================

如何獲得更多的細節？我試圖避免像Wireshark這樣的低級工具，我希望有選項跟蹤/日誌/捕獲有關API失敗的應用程序調用的更多細節。

更新 - 這裏是追蹤信息時失敗：

System.Net Information: 0 : [2292] SecureChannel#49584532::.ctor(hostname=XX.XX.com, clientCertificates=0, encryptionPolicy=RequireEncryption)

System.Net Information: 0 : [2292] SecureChannel#49584532 - Left with 0 client certificates to choose from.

System.Net Information: 0 : [2292] Using the cached credential handle. System.Net Information: 0 : [2292] InitializeSecurityContext(credential = System.Net.SafeFreeCredential_SECURITY, context = (null), targetName = XX.XX.com, inFlags = ReplayDetect, SequenceDetect, Confidentiality, AllocateMemory, InitManualCredValidation) System.Net Information: 0 : [2292] InitializeSecurityContext(In-Buffer length=0, Out-Buffer length=178, returned code=ContinueNeeded).

System.Net.Sockets Verbose: 0 : [2292] Socket#14347911::BeginSend()

System.Net.Sockets Verbose: 0 : [2292] Exiting Socket#14347911::BeginSend() -> OverlappedAsyncResult#19699911 System.Net.Sockets Verbose: 0 : [2292] Data from Socket#14347911::PostCompletion

[ Removed ]

System.Net.Sockets Verbose: 0 : [2292] Socket#14347911::EndSend(OverlappedAsyncResult#19699911)

System.Net.Sockets Verbose: 0 : [2292] Exiting Socket#14347911::EndSend() -> Int32#178

System.Net.Sockets Verbose: 0 : [2292] Socket#14347911::BeginReceive()

System.Net.Sockets Verbose: 0 : [2292] Exiting Socket#14347911::BeginReceive() -> OverlappedAsyncResult#2389992

System.Net.Sockets Verbose: 0 : [2292] Socket#14347911::EndReceive(OverlappedAsyncResult#2389992)

System.Net.Sockets Error: 0 : [2292] Socket#14347911::UpdateStatusAfterSocketError() - ConnectionReset

System.Net.Sockets Error: 0 : [2292] Exception in Socket#14347911::EndReceive - An existing connection was forcibly closed by the remote host. System.Net.Sockets Verbose: 0 : [2292] Exiting Socket#14347911::EndReceive() -> Int32#0

System.Net.Sockets Verbose: 0 : [2292] Socket#14

來源

2016-07-26 Josh

對api的調用可能失敗。當您連接到服務器時，您使用的訪客權限通常不具有在服務器上運行api的憑據。必須將api安裝在服務器上才能以管理員權限運行。爲了驗證我是正確的，我將檢查服務器上的事件查看器以獲取有關該錯誤的更多詳細信息。 – jdweng

對使用HTTP的API的調用起作用，但是當我切換API URI時使用HTTPS會引發上述錯誤。 – Josh

你測試空響應嗎？不確定的根本原因，但我懷疑你可能會得到空包。 – jdweng

的日誌條目：

System.Net.Sockets Error: 0 : [2292] Socket#14347911::UpdateStatusAfterSocketError() - ConnectionReset

被認爲是阻塞端口防火牆引起的。一旦添加新的防火牆規則，問題就解決了。

來源

2016-08-13 19:45:43 Josh

底層連接已關閉 - API端點調用失敗

回答

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