我可以将 gRPC 和 webapi 应用程序组合到 C# 中的 .NET Core 3.0 中吗？

Question

I am using dot.net core 3.0.

I have gRPC app. I am able to communicate to it through gRPC protocol.

I thought my next step would be add some restful API support. I modified my startup class to add controllers, routing etc..... When I try navigating to the API using a browser, I get an error "ERR_INVALID_HTTP_RESPONSE" no matter which protocol (http/https) and port I use. gRPC should be using 5001 and webapi using 8001.

heres my startup class:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddGrpc();
        services.AddControllers();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
            app.UseDeveloperExceptionPage();

        app.UseRouting();
        app.UseHttpsRedirection();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGrpcService<BootNodeService>();
            endpoints.MapControllers();

        });
    }
}

And my controller:

[ApiController]
[Route("[controller]")] 
public class AdminController : ControllerBase 
{ 
    [HttpGet] public string Get() 
    { return "hello"; } 
}

Any thoughts?

Thnx

EDIT : the entire project can be found at this repo .

EDIT : view of screen

Answer 1

I found the solution. I didn't mention I was running on MacOS and using Kestrel (and it appears the combination of MacOS AND Kestrel is the problem). I apologize for that missing information.

The solution is similar to what is here . I had to add a call to options.ListenLocalhost for the webapi port.

here's the code:

public class Program
{
    public static void Main(string[] args)
    {
       IHostBuilder hostBuilder = CreateHostBuilder(args);
       IHost host = hostBuilder.Build();
       host.Run();
    }

    // Additional configuration is required to successfully run gRPC on macOS.
    // For instructions on how to configure Kestrel and gRPC clients on macOS, visit https://go.microsoft.com/fwlink/?linkid=2099682
    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.ConfigureKestrel(options =>
                {
                    options.ListenLocalhost(5001, o => o.Protocols =
                        HttpProtocols.Http2);

                    // ADDED THIS LINE to fix the problem
                    options.ListenLocalhost(11837, o => o.Protocols =
                        HttpProtocols.Http1);
                });
                webBuilder.UseStartup<Startup>();
            });
    }
}

Thnx

Answer 2

Another solution is configure Kestrel parameter on appsettings.json . It work with .Net Core 3.1 too.

Edit appsettings.json and set Endpoints with WebApi and gRPC with your custom name. You don't need change the Program.cs .

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "Kestrel": {
    "Endpoints": {
      "WebApi": {
        "Url": "http://localhost:5001",
        "Protocols": "Http1"
      },
      "gRPC": {
        "Url": "http://localhost:11837",
        "Protocols": "Http2"
      }
    }
  }
}