无法托管或连接到服务

Question

我正在使用 Protobuf-net 创建一个简单的示例供我使用，但我无法让它工作。

我从客户端收到以下错误：

状态（StatusCode="不可用....

我已经从protobuf-net.Grpc下载了示例项目Client_CS、Server_CS和Shared_CS，当运行那.

启动服务器时弹出的网页，使用的是urllocalhost:44312

但是 launchSettings 说：

"iisExpress": {
      "applicationUrl": "http://localhost:9385",
      "sslPort": 44312
    }

还有

"applicationUrl": "https://localhost:5001;http://localhost:5000",

但是启动设置为侦听端口 10042，客户端正在同一端口上寻找服务。很混乱？

合同：

[ProtoContract]
public class TestRequest
{
        
}

[ProtoContract]
public class TestResponse
{
    [ProtoMember(1)]
    public string Text { get; set; }
}

服务：

public class TestService : ITestService
{
    public ValueTask<TestResponse> TestAsync(TestRequest request, CallContext context = default)
    {
        TestResponse resp = new TestResponse();
        resp.Text = "weee";

        return new ValueTask<TestResponse>(resp);
    }
}

Program.cs:

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    public static IWebHostBuilder CreateHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .ConfigureKestrel(options =>
            {
                options.ListenLocalhost(10042, listenOptions =>
                {
                    listenOptions.Protocols = HttpProtocols.Http2;
                });
            })
            .UseStartup<Startup>();
}

Startup.cs:

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddCodeFirstGrpc(config =>
        {
            config.ResponseCompressionLevel = System.IO.Compression.CompressionLevel.Optimal;
        });

        services.AddSingleton<ITestService, TestService>();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

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

            endpoints.MapGet("/", async context =>
            {
                await context.Response.WriteAsync("Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");
            });
        });
    }
}

lanuchSettings.json:

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:9385",
      "sslPort": 44312
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "Protobuf_net.API": {
      "commandName": "Project",
      "dotnetRunMessages": "true",
      "launchBrowser": false,
      "applicationUrl": "https://localhost:5001;http://localhost:5000",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}

客户：

GrpcClientFactory.AllowUnencryptedHttp2 = true;
using var http = GrpcChannel.ForAddress("http://localhost:10042");

var testService = http.CreateGrpcService<ITestService>();
var result = await testService.TestAsync(new TestRequest());
Console.WriteLine($"Result: {result.Text}");

Console.WriteLine("Press [Enter] to exit");
Console.ReadLine();

Answer 1

我认为这只是一件IDE事情；默认情况下，IDE 想要使用 IIS，坦率地说：它把一切搞得一团糟。首先，将服务器项目设置为单启动项目（右击项目，“设置为启动项目”）：

现在，在 IDE 的顶部，您会可能看到它正在尝试使用 IIS：

这是错误的配置；将其更改为服务器项目本身 :

现在当您运行服务器时，它应该加载到正确的端口。

无法托管或连接到服务

Unable to host or connect to service

protobuf-net