Make PropertyNameCaseInsensitive available for JSON->gRPC transcoding

[JasonSmithStoneX]

Is there an existing issue for this?

• I have searched the existing issues

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

I am trying to make a drop-in replacement microservice that supports both REST and gRPC for an existing microservice that is REST-only, but my issue is that the current microservice is case insensitive, but grpc/json transcoding cannot be made to be.

Describe the solution you'd like

Add PropertyNameCaseInsensitive to GrpcJsonSettings
Initialize JsonSerializerOptions with this flag in JsonConverterHelper.CreateSerializerOptions()

Additional context

No response

[tony1223]

I got the same issue and here's a temporary workaround:

        grpcServerBuilder.AddJsonTranscoding((o) =>
        {
            var prop = o.GetType().GetProperty("UnarySerializerOptions", System.Reflection.BindingFlags.NonPublic
                                                                         | System.Reflection.BindingFlags.Instance);
            JsonSerializerOptions option= (JsonSerializerOptions) prop.GetValue(o);
            option!.PropertyNameCaseInsensitive = true;
                      
            prop = o.GetType().GetProperty("ServerStreamingSerializerOptions", System.Reflection.BindingFlags.NonPublic
                                                                         | System.Reflection.BindingFlags.Instance);
            option= (JsonSerializerOptions) prop.GetValue(o);
            option!.PropertyNameCaseInsensitive = true;
            
        });

I hope it could be one of the option for GrpcJsonTranscodingOptions.

[chaoyebugao]

I got the same issue and here's a temporary workaround:

        grpcServerBuilder.AddJsonTranscoding((o) =>
        {
            var prop = o.GetType().GetProperty("UnarySerializerOptions", System.Reflection.BindingFlags.NonPublic
                                                                         | System.Reflection.BindingFlags.Instance);
            JsonSerializerOptions option= (JsonSerializerOptions) prop.GetValue(o);
            option!.PropertyNameCaseInsensitive = true;
                      
            prop = o.GetType().GetProperty("ServerStreamingSerializerOptions", System.Reflection.BindingFlags.NonPublic
                                                                         | System.Reflection.BindingFlags.Instance);
            option= (JsonSerializerOptions) prop.GetValue(o);
            option!.PropertyNameCaseInsensitive = true;
            
        });

I hope it could be one of the option for GrpcJsonTranscodingOptions.

It seems not working in .NET 8. I want to use lowerCamelCase style input/output but no way to do it.

[akunzai]

Here is another workaround for .NET 8

builder.Services.AddGrpc().AddJsonTranscoding();
builder.Services.PostConfigure<GrpcJsonTranscodingOptions>(options =>
{
    foreach (var name in new[] { "UnarySerializerOptions", "ServerStreamingSerializerOptions" })
    {
        var prop = options.GetType().GetProperty(name,
            System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
        var serializerOptions = prop!.GetValue(options) as JsonSerializerOptions;
        serializerOptions!.PropertyNameCaseInsensitive = true;
    }
});

[aspmaker]

When i try to use AddJsonTranscoding(), i get this error message:

Exception was thrown by handler. InvalidCastException: Unable to cast object of type 'Google.Protobuf.WellKnownTypes.StringValue' to type 'System.String'.

How can i can solve this issue? Thank you.