grpc 服务器显示“未实现的服务错误”

Question

我在这条指令之后创建了一个 grpc 服务器和客户端：https ://docs.microsoft.com/en-us/aspnet/core/tutorials/grpc/grpc-start?view=aspnetcore-3.0&tabs=visual-studio 。

当我尝试从客户端调用服务时，客户端显示此错误消息：“发生了一个或多个错误。(Status(StatusCode=Unknown, Detail="No status received"))”

而服务器这个：

info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/2 POST http://STEINI-PC/LocationService/GetLocations application/grpc
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'gRPC - gRPC - Unimplemented service'
info: Grpc.AspNetCore.Server.Internal.ServerCallHandlerFactory[1]
      Service 'LocationService' is unimplemented.
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'gRPC - gRPC - Unimplemented service'
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 51.812000000000005ms 200 application/grpc

原型文件：

info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/2 POST http://STEINI-PC/LocationService/GetLocations application/grpc
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'gRPC - gRPC - Unimplemented service'
info: Grpc.AspNetCore.Server.Internal.ServerCallHandlerFactory[1]
      Service 'LocationService' is unimplemented.
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'gRPC - gRPC - Unimplemented service'
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 51.812000000000005ms 200 application/grpc

服务器启动：

syntax = "proto3";

service EventService {
    rpc GetEvents (Empty) returns (Events) {}
    rpc GetEvent (Id) returns (Event) {}
    rpc GetEventsByLocation (Id) returns (Events) {}
    rpc AddEvent (Event) returns (Empty) {}
    rpc UpdateEvent (Event) returns (Empty) {}
    rpc DeleteEvent (Id) returns (Event) {}
}

service LocationService {
    rpc GetLocations (Empty) returns (Locations) {}
    rpc GetLocation (Id) returns (Location) {}
    rpc AddLocation (Location) returns (Empty) {}
    rpc UpdateLocation (Location) returns (Empty) {}
    rpc DeleteLocation (Id) returns (Location) {}
}

service ParticipantService {
    rpc GetParticipants (Empty) returns (Participants) {}
    rpc GetParticipant (Id) returns (Participant) {}
    rpc GetParticipantsFromEvent (Id) returns (Participants) {}
    rpc AddParticipant (Participant) returns (Empty) {}
    rpc UpdateParticipant (Participant) returns (Empty) {}
    rpc DeleteParticipant (Id) returns (Participant) {}
}

message Empty {

}

message Id {
    string id = 1;
}

message Events{
    repeated Event events = 1;
}

message Locations{
    repeated Location locations = 1;
}

message Participants{
    repeated Participant participants = 1;
}

message Event {
    Id eventid = 1;
    string name = 2;
    string description = 3;
    Id locationID = 4;
    string date = 5;
}

message Location {
    Id locationID = 1;
    string name = 2;
    string adress = 3;
}

message Participant {
    Id participantId = 1;
    string name = 2;
    Id eventId = 3;
}

定位服务：

public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            var connectionString = @"Data Source=STEINI-PC;Initial Catalog=thesisSteinmetz;Persist Security Info=True;User ID=SA;Password=SA123";

            services.AddGrpc(options =>
            {
                options.EnableDetailedErrors = true;
            });
            services.AddDbContext<DataContext>(options => options.UseSqlServer(connectionString));
        }

        // 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 =>
            {
                // 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
                endpoints.MapGrpcService<EventService>();
                endpoints.MapGrpcService<LocationService>();
                endpoints.MapGrpcService<ParticipantService>();
            });
        }
    }

Answer 1

我已经找到问题了。

我的问题是生成的文件的不同命名空间，我手动编辑了这些文件。

Answer 2

进入programs.cs并添加您的服务。

// Configure the HTTP request pipeline.
app.MapGrpcService<GreeterService>(); // here's a service
app.MapGrpcService<UserAuthService>(); // another service i created
app.MapGrpcService<BusinessService>(); // also another service created

app.MapGet("/", () => "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");

app.Run();