Grpc.Core.RpcException: 'Status(StatusCode=Unavailable, Detail="Connect Failed")'

[HamedMtpr]

Hi,
I get this example, and run both client and server my local machine when the client run this line:
using (var call = client.GetAll(new Messages.GetAllRequest()))
{
var responseStream = call.ResponseStream;
while (await responseStream.MoveNext())
{
Console.WriteLine(responseStream.Current.Location);
}
}
i get the following exception:
Grpc.Core.RpcException: 'Status(StatusCode=Unavailable, Detail="Connect Failed")'

how i can solve this?

[ionlam]

1. I have installed Win64 OpenSSL v1.1.1d EXE | MSI (experimental)
   https://slproweb.com/download/Win64OpenSSL-1_1_1d.msi

2. I have created a new file called gencert_call.bat besides gencert.bat
   with the following content

set COMPUTERNAME=localhost
set CLIENT-COMPUTERNAME=localhost
set PATH=%path%;C:\Program Files\OpenSSL-Win64\bin
call gencert.bat
pause

3. generated ca, client and server .crt .csr .key files by executing gencert_call.bat and use these to overwrite existing files in Server and Client projects

4. I have made replacements in both Server and Client C# code
   replaced
   127.0.0.1 with localhost
   and
   Environment.MachineName with localhost

5. Run the Server and then run the Client and it works

[ionlam]

Or one can ignore certificates validations
i.e.
in Server code:

      public static IHostBuilder CreateHostBuilder(string[] args) => Host
         .CreateDefaultBuilder(args)
         .UseWindowsService()
         .ConfigureWebHostDefaults(webBuilder =>
         {
            webBuilder.UseUrls(ServerUrl);
            webBuilder.UseStartup<Startup>();
            webBuilder.ConfigureKestrel(o => o.ConfigureHttpsDefaults(o => o.ClientCertificateMode = ClientCertificateMode.AllowCertificate));
         });

in Client code:

         while (true)
         {
            Console.Write("Name: ");
            var name = Console.ReadLine();
            if (string.IsNullOrWhiteSpace(name)) break;
            using (var httpClientHandler = new HttpClientHandler { ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator })
            using (var httpClient = new HttpClient(httpClientHandler))
            using (var channel = GrpcChannel.ForAddress(ServerUrl, new GrpcChannelOptions { HttpClient = httpClient }))
            {
               var client = new Greeter.GreeterClient(channel);
               var reply = await client.SayHelloAsync(new HelloRequest { Name = name });
               Console.WriteLine("Greeting: " + reply.Message);
            }
         }