Grpc.Net.ClientFactory .NETStandard2.0 compatibility

[Dimigergo]

Is your feature request related to a problem? Please describe.

I hava an UWP project which uses Grpc.Net.Client.Web 2.36.0. I see, that this version supports .NETStandard2.0, but the
Grpc.Net.ClientFactory only supports .NETStandard2.1 and net5.0.
The UWP doesn't support 2.1 or .net5 yet.

My problem is I would like to use interceptors for the client side, according to this code:

services
    .AddGrpcClient<Greeter.GreeterClient>(o =>
    {
        o.Address = new Uri("https://localhost:5001");
    })
    .AddInterceptor(() => new SomeInterceptor())   

Describe the solution you'd like

Grpc.Net.ClientFactory .NETStandard2.0 compatibility

Describe alternatives you've considered

Closely enough to me that add multiple interceptor with somewhere on these lines:

CallCredentials callCredentials = CallCredentials.FromInterceptor(CHttpClientService.AsyncAuthInterceptor);
    return GrpcChannel.ForAddress(Settings.CSettings.ServerAddress, new GrpcChannelOptions
    {
        HttpHandler = new GrpcWebHandler(new CHttpClientService().PrepareHttpMessageHandler()),
        Credentials = ChannelCredentials.Create(new SslCredentials(), callCredentials),
    });

AsyncAuthInterceptor is not good for me, because it is called only before the function call.

[HppZ]

need .NETStandard2.0 support toooo

[JamesNK]

netstandard2.0 client factory will be in the next release.

You can add interceptors like this to a channel without client factory:

var channel = GrpcChannel.ForAddress("https://blah");
var invoker = channel.Intercept(new SomeInterceptor());

var client = Greeter.GreeterClient(invoker);

The extension method is in Grpc.Core.Interceptors.ChannelExtensions.

[Dimigergo]

Thank you for your help!
Waiting for the release.

[HppZ]

gRPC requires extra configuration on .NET implementations that don't support gRPC over HTTP/2. An HTTP provider must be specified using GrpcChannelOptions.HttpHandler.The configured HTTP provider must either support HTTP/2 or be configured to use gRPC-Web. See https://aka.ms/pzkMXDs for details.

so grpc.net.client does not support UWP?

[Dimigergo]

Grpc.Net.Client 2.36.0 is compatible with .netstandard2.0 so you can use it in UWP project. I only use grpc-web, because we have this project in Uno Platform, and compile it to webassembly, where we can't use grpc, only grpc-web.

[HppZ]

I have to set GrpcWebHandler as grpc httphandler in UWP app. here

[Dimigergo]

Ohh, I see! Microsoft will plan to support .netstandard2.1 and .net 5 for UWP, but don't know when. 21H1 os 21H2. We also wait for it.

[HppZ]

hope it won't be long. so sad.