Podio

Question

从今天开始，我们在向 Podio 发出 API 请求时收到以下错误：

An existing connection was forcibly closed by the remote host Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

堆栈跟踪：

Exception Details: System.Net.Sockets.SocketException: An existing connection 
was forcibly closed by the remote host

[SocketException (0x2746): An existing connection was forcibly closed by the remote host]
   System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult) +82
   System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult) +57

[IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.]
   System.Net.TlsStream.EndWrite(IAsyncResult asyncResult) +232
   System.Net.PooledStream.EndWrite(IAsyncResult asyncResult) +13
   System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar) +119

[WebException: The underlying connection was closed: An unexpected error occurred on a send.]
   System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) +623
   System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) +64

[HttpRequestException: An error occurred while sending the request.]
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +99
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Net.Http.<FinishSendAsync>d__58.MoveNext() +948
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +99
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   PodioAPI.<Request>d__36`1.MoveNext() +626
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +99
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   PodioAPI.<Get>d__31`1.MoveNext() +307
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +99
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   PodioAPI.Services.<GetItem>d__6.MoveNext() +277
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +99
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58

拜托，有人可以阐明这个问题吗？我们没有更改代码中的任何内容。这基本上才刚刚开始发生。在多个设备和位置进行了尝试，因此认为 Podio 端一定发生了一些变化。我们正在使用这里的库 - http://podio.github.io/podio-dotnet/

Answer 1

跑道已禁用 TLS 1.0 - 最后一点已于昨天完成。 TLS 1.0 不久前已被弃用，它的生命周期定于 2018 年 6 月。

详情在这里：https://help.podio.com/hc/en-us/community/posts/360003048772-API-Security-Update

跑道有一天也会禁用 TLS 1.1，所以如果你要升级 - 移动到最新的 TLS 1.2。

此外，现在发布了新版本的 nuget 包：

Answer 2

如果您的应用程序以 4.0 < 4.6 之间的 Dotnet Framework 为目标，那么您需要将默认的 SecurityProtocol 至少设置为传输层安全性 (TLS) 1.1，即

SecurityProtocolType.Tls11

参考：

Podio - 现有连接被远程主机强行关闭

Podio - An existing connection was forcibly closed by the remote host

c#