Styjun

I have been doing some test migrating .NET Framework 4.6.2 apps to .NET Core 2. I noticed that this particular app, a monitoring http is not working fine with Net Core 2. Can you please help me to verify what is happening?

static void Main(string[] args)
 
 try
 
 HttpWebRequest myhttpWebReqest = (HttpWebRequest)WebRequest.Create("https://www.google.com.mx/");
 System.Diagnostics.Stopwatch timer = new System.Diagnostics.Stopwatch();
 timer.Start();
 HttpWebResponse myHttpWebResponse = (HttpWebResponse)myhttpWebReqest.GetResponse();
 timer.Stop();
 TimeSpan timeSpan = timer.Elapsed;
 Console.WriteLine(timeSpan.ToString());
 Console.WriteLine();
 Console.WriteLine(myHttpWebResponse.StatusCode);
 Console.WriteLine((int)myHttpWebResponse.StatusCode);
 Console.WriteLine();
 Console.WriteLine(myhttpWebReqest.ServicePoint.Certificate.GetEffectiveDateString());
 Console.WriteLine();
 Console.WriteLine(myhttpWebReqest.ServicePoint.Certificate.GetExpirationDateString());
 Console.WriteLine();
 Console.WriteLine(myhttpWebReqest.ServicePoint.Certificate.Issuer);
 Console.WriteLine();
 Console.WriteLine(myhttpWebReqest.ServicePoint.Certificate.Subject); 
 
 catch (Exception ex)
 
 Console.WriteLine(ex.Message);
 if(ex.InnerException !=null)
 
 Console.WriteLine(ex.InnerException);
 
 
 Console.ReadLine();
 
}

in the .NET Framework 4.6.2 i see the certificate data, in the .NET Core 2 i see myhttpWebReqest.ServicePoint.Certificate null ... do you know why?

See discussion of this here: https://github.com/dotnet/corefx/issues/36979

ServicePointManager and ServicePoint classes are no-op on .NET Core. But you can do a similar thing with HttpClient. HttpClient is the more modern and preferred HTTP API in .NET Framework and .NET Core.

using System;
using System.Net.Http;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;

namespace NetCoreConsoleApp1

 class Program
 
 static void Main(string[] args)
 
 var handler = new HttpClientHandler();
 handler.ServerCertificateCustomValidationCallback = CustomCallback;
 var client = new HttpClient(handler);

 HttpResponseMessage response = client.GetAsync("https://www.google.com.mx/").GetAwaiter().GetResult();
 Console.WriteLine(response.StatusCode);
 Console.WriteLine((int)response.StatusCode);
 

 private static bool CustomCallback(HttpRequestMessage arg1, X509Certificate2 arg2, X509Chain arg3, SslPolicyErrors arg4)
 
 Console.WriteLine(arg2.GetEffectiveDateString());
 Console.WriteLine(arg2.GetExpirationDateString());
 Console.WriteLine(arg2.Issuer);
 Console.WriteLine(arg2.Subject);

 return arg4 == SslPolicyErrors.None;