HttpClient Request get 401 "No Client Cert"

Question

Xamarin Forms making a HttpClient Post from the simulator with a .p12 certificate attached. It keeps returning 401 "No Client Cert" from the REST Service. I created a separate console C# application with the same code and it works fine, I get a 200 response from the server plus content which is expected.

The only difference I note is that the C# console application is using .NET Core 3.1 and the Xamarin Forms app is using .NET Standard 2.1

Answer 1

Hello,​

Did you add accessToken in request header?

If not, please use AuthenticationHeaderValue to add accessToken in request header.

   HttpClient client = new HttpClient();  
   client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", ACCESS_TOKEN);  

If you add it, this issue still exists. Please share minimize code.

Best Regards,

Leon Lu

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