【原创】HttpClient访问“不可靠”Https时错误处理

使用HttpClient访问http站点，正常。
使用HttpClient访问带有合法证书的https站点，正常。
但，使用HttpClient访问“不合法证书”的https站点，如直接使用IP地址访问，则出现异常。

代码如下

var aa = new HttpClient();
var a1 = aa.GetAsync("http://x.x.x.x/health");
var a2 = a1.Result;

异常内容：

System.AggregateException:“One or more errors occurred. (The SSL connection could not be established, see inner exception.)”

AuthenticationException: The remote certificate is invalid according to the validation procedure: RemoteCertificateNameMismatch, RemoteCertificateChainErrors

处理办法：

 HttpClientHandler clientHandler = new HttpClientHandler();
 clientHandler.ServerCertificateCustomValidationCallback += (sender, cert, chain, sslPolicyErrors) => {
    
     return true; };
 clientHandler.SslProtocols = SslProtocols.None;

 var aa = new HttpClient(clientHandler);
 var a1 = aa.GetAsync("https://x.x.x.x/health");
 var a2 = a1.Result;

这样，就不再报异常了。