如何更改 ASP.NET Core 6 中的 Grpc 端口？答案

【问题标题】：How to change Grpc Port in ASP.NET Core 6?如何更改 ASP.NET Core 6 中的 Grpc 端口？
【发布时间】：2022-08-11 17:36:56
【问题描述】：

我正在尝试更改 ASP.NET Core 6 Grpc 应用程序中的 HTTPS 端口，但只要未设置特定端口（在我的情况下为 7113），应用程序总是显示错误。我计划将应用程序 dockerize 并且需要动态设置 IP。这是我的 Program.cs 文件，

global using dtms_service_master.Models.Context;
using dtms_service_master.Controllers;
using dtms_service_master.Models;
using dtms_service_master.Repositories;
using dtms_service_master.Services;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.EntityFrameworkCore;
using Microsoft.OpenApi.Models;

var builder = WebApplication.CreateBuilder(args);

builder.WebHost.ConfigureKestrel(serverOptions =>
{
    serverOptions.ListenAnyIP(80, listenOptions =>
    {
        listenOptions.Protocols = HttpProtocols.Http1;
    });
    serverOptions.ListenAnyIP(7113, listenOptions => // in my case this needs always to be 7113 :(
    {
        listenOptions.Protocols = HttpProtocols.Http2;
        listenOptions.UseHttps();
    });
});

var Configuration = builder.Configuration;

// 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

// Add services to the container.
builder.Services.AddGrpc();
builder.Services.AddGrpcHttpApi();
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc(\"v1\", new OpenApiInfo { Title = \"My API\", Version = \"v1\" });
});
builder.Services.AddGrpcSwagger();

builder.Services.AddGrpcReflection();

builder.Services.AddCors(o =>
    o.AddDefaultPolicy(builder =>
    {
        builder.WithOrigins(\"*\")
               .AllowAnyMethod()
               .AllowAnyHeader()
               .WithExposedHeaders(
                    \"Grpc-Status\",
                    \"Grpc-Message\",
                    \"Grpc-Encoding\",
                    \"Grpc-Accept-Encoding\");
    }));

builder.Services.AddDbContextFactory<ServiceMasterContext>(
    options => options.UseNpgsql(Configuration.GetConnectionString(\"DefaultConnection\")));
builder.Services.AddRepository();
builder.Services.AddServices();
builder.Services.AddAutoMapper(typeof(Mapper));
builder.Services.Configure<KestrelServerOptions>(options => options.AllowSynchronousIO = true);

var app = builder.Build();

app.UseSwagger();
app.UseSwaggerUI(c =>
{
    c.SwaggerEndpoint(\"/swagger/v1/swagger.json\", \"gRPC HTTP API Example V1\");
});

app.UseRouting();
app.UseGrpcWeb(new GrpcWebOptions { DefaultEnabled = true });
app.UseCors();

if (app.Environment.IsDevelopment())
    app.MapGrpcReflectionService();

app.UseEndpoints(endpoints =>
{
    endpoints.MapGrpcService<GreeterService>();
    endpoints.MapGrpcService<DummyController>();
    endpoints.MapGrpcService<VendorController>();
});

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();

这是我之前提到的错误，

Grpc.Core.RpcException: Status(StatusCode=\"Unavailable\", Detail=\"Error starting gRPC call. HttpRequestException: No connection could be made because the target machine actively refused it. (localhost:7113) SocketException: No connection could be made because the target machine actively refused it.\", DebugException=\"System.Net.Http.HttpRequestException: No connection could be made because the target machine actively refused it. (localhost:7113)
 ---> System.Net.Sockets.SocketException (10061): No connection could be made because the target machine actively refused it.
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
   at System.Net.Sockets.Socket.<ConnectAsync>g__WaitForConnectWithCancellation|283_0(AwaitableSocketAsyncEventArgs saea, ValueTask connectTask, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.DefaultConnectAsync(SocketsHttpConnectionContext context, CancellationToken cancellationToken)
   at System.Net.Http.ConnectHelper.ConnectAsync(Func`3 callback, DnsEndPoint endPoint, HttpRequestMessage requestMessage, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.ConnectAsync(Func`3 callback, DnsEndPoint endPoint, HttpRequestMessage requestMessage, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.GetHttp2ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at Grpc.Net.Client.Internal.GrpcCall`2.RunCall(HttpRequestMessage request, Nullable`1 timeout)\")
   at Grpc.Net.Client.Internal.HttpContentClientStreamWriter`2.WriteAsyncCore[TState](Func`5 writeFunc, TState state)
   at Kreya.Grpc.Core.Importer.ServerReflection.GrpcServerReflectionImporter.ReadAllServices(AsyncDuplexStreamingCall`2 call)
   at Kreya.Grpc.Core.Importer.ServerReflection.GrpcServerReflectionImporter.ImportViaServerReflection(GrpcServerReflectionImporterOptions options)

知道如何正确更改 HTTPS 端口吗？

您需要使用服务器正在使用的相同端口号。如果您使用错误的端口号，服务器将不会响应。端口号可以是用户输入，但服务器必须监听用户输入的端口号。
你什么时候在启动或调用任何 API 时出错？检查这个。 stackoverflow.com/a/70817994/9247039
该端口也可以被防火墙阻止。
您更改了服务器上的端口，但您是否在客户端上设置了相同的端口？

标签： c# asp.net-core grpc

【解决方案1】：

由于您使用的是 Docker，因此您需要使用 docker run -p 命令公开端口。检查它的链接here。

此外，如何在 asp.net 核心应用程序中执行此操作，see this。

【讨论】：