.net core在centOS Linux環境下使用HttpClient請求https失敗的解決方法

The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing.

dotnet core在Linux(如：centOS)環境下使用HttpClient請求https可能會報異常：

One or more errors occurred. (The SSL connection could not be established, see inner exception.) 

設置如下環境變量暫時解決：

export DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0

 

 

 

如果服務器在國外，C#代碼訪問國內的網站，還有可能是被牆。