Question: Could not load type 'ServiceModel.Grpc.Client.Internal.IClientBuilder. Exception happens when I upgrade 1.8.2 to 1.21

[yaugkeer]

I'm not sure if the version upgrade arose the problem, so I want someone to help me.
perhaps, I should upgrade my codes according to the newest version. Who can show me some newer code to replace it? Thanks

Could not load type 'ServiceModel.Grpc.Client.Internal.IClientBuilder`1' from assembly 'ServiceModel.Grpc, Version=1.21.0.0, Culture=neutral, PublicKeyToken=ba2245ad9cab75c7'.

at ServiceModel.Grpc.Client.DependencyInjection.Internal.ClientFactoryBuilder.AddClientCore[TContract](ClientResolver1 client, IClientBuilder1 builder, Action2 configure, IChannelProvider channel) at ServiceModel.Grpc.Client.DependencyInjection.Internal.ClientFactoryBuilder.AddClient[TContract](Action2 configure, IChannelProvider channel)
at EXOM.AppClient.BuildWithGrpcNetChannel()

my BuildWithGrpcNetChannel code:
private static ServiceProvider BuildWithGrpcNetChannel()
{
var services = new ServiceCollection();
_ = services.AddUserProvider();

var httpsHandler = new SocketsHttpHandler
{
SslOptions = new SslClientAuthenticationOptions
{
RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true
}
};

// Grpc.Net.Client.GrpcChannel
_ = services.AddSingleton(_ =>
GrpcChannel.ForAddress(_serverAddress, new GrpcChannelOptions()
{
HttpHandler = httpsHandler,
MaxSendMessageSize = (4 * 1024 * 1024) * 100,
MaxReceiveMessageSize = (4 * 1024 * 1024) * 100,
})
.Intercept(new ClientLoggerInterceptor(Logger, new UserInfoProvider())));

_ = services
.AddTokenProvider()
.AddServiceModelGrpcClientFactory()
.AddClient()
.AddClient()
.AddClient();//throw exception in this line

return services.BuildServiceProvider();
}

[max-ieremenko]

upgrade 1.8.2 to 1.21
Could not load type 'ServiceModel.Grpc.Client.Internal.IClientBuilder`1' from assembly 'ServiceModel.Grpc, Version=1.21.0.0, Culture=neutral, PublicKeyToken=ba2245ad9cab75c7'.

It looks like your projects still reference version 1.8.2. Please double-check.
Delete all obj and bin folders and rebuild the solution.

[yaugkeer]

You are right. I used old ServiceModel.Grpc.Client.DependencyInjection 1.8.2.
After I upgraded it to 1.21, it works.
Another question:
How can I use https?
I changed my code to:
var channel = GrpcChannel.ForAddress($"https://101.xx.81.8x:8091");
then throw a exception like this.
I'm sure my server works, it writes to console:
info: Microsoft.Hosting.Lifetime[14]
Now listening on: https://[::]:8091
info: Microsoft.Hosting.Lifetime[0]
Application started. Press Ctrl+C to shut down.

starting gRPC call. HttpRequestException: The SSL connection could not be established, see inner exception. IOException: Received an unexpected EOF or 0 bytes from the transport stream.", DebugException="System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.")”

[max-ieremenko]

IOException: Received an unexpected EOF or 0 bytes from the transport stream

sounds like the SSL certificate is not configured correctly on the server.
Check this link kestrel configure https or any other related docs. See also grpc-dotnet examples, they are configured to use dev SSL certificate.

[yaugkeer]

I run your example Certifier, but client console writes:
Setting up HttpClient. Client has certificate: False
Sending gRPC call...
gRPC error from calling service: Bad gRPC response. HTTP status code: 403

Setting up HttpClient. Client has certificate: True
Sending gRPC call...
gRPC error from calling service: Error starting gRPC call. HttpRequestException: An HTTP/2 connection could not be established because the server did not complete the HTTP/2 handshake. (InvalidResponse) HttpIOException: An HTTP/2 connection could not be established because the server did not complete the HTTP/2 handshake. (InvalidResponse) IOException: The decryption operation failed, see inner exception. Win32Exception: The certificate chain is issued by an untrusted authority.

And I need production evvironment configuration for https certificates. Since I had a server public IP's cert.pfx from CertumSSL, but I don't know how to use it. If the client involves a client.pfx or not, I see a a client.pfx in your client but server has none.

[max-ieremenko]

The Certifier example is not mine :)
Please address your question to the grpc-dotnet repository.