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Не могу понять этого ни за что на свете. У меня есть простой шаблон .NET 5.0 React SPA (я ничего не изменил), и он отлично работает, когда я настраиваю его для локального запуска в режиме отладки. Но если я переключу его в режим выпуска, я получу сообщение об ошибке 500, в котором говорится, что страница в настоящее время не может обработать этот запрос.

Вот файл Program.cs.

 using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

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

        public static IHostBuilder CreateHostBuilder( string[] args ) =>
            Host.CreateDefaultBuilder( args )
                .ConfigureWebHostDefaults( webBuilder => {
                    webBuilder.UseStartup<Startup>();
                } );
    }
}

 

и файл Startup.cs

 using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI;
using Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using SpaTest.Data;
using SpaTest.Models;

namespace SpaTest {
    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.AddDbContext<ApplicationDbContext>( options =>
                 options.UseSqlServer(
                     Configuration.GetConnectionString( "DefaultConnection" ) ) );

            services.AddDatabaseDeveloperPageExceptionFilter();

            services.AddDefaultIdentity<ApplicationUser>( options => options.SignIn.RequireConfirmedAccount = true )
                .AddEntityFrameworkStores<ApplicationDbContext>();

            services.AddIdentityServer()
                .AddApiAuthorization<ApplicationUser, ApplicationDbContext>();

            services.AddAuthentication()
                .AddIdentityServerJwt();

            services.AddControllersWithViews();
            services.AddRazorPages();

            // In production, the React files will be served from this directory
            services.AddSpaStaticFiles( configuration => {
                configuration.RootPath = "ClientApp/build";
            } );
        }

        // 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.UseMigrationsEndPoint();
            } else {
                app.UseExceptionHandler( "/Error" );
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseSpaStaticFiles();

            app.UseRouting();

            app.UseAuthentication();
            app.UseIdentityServer();
            app.UseAuthorization();
            app.UseEndpoints( endpoints => {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller}/{action=Index}/{id?}" );
                endpoints.MapRazorPages();
            } );

            app.UseSpa( spa => {
                spa.Options.SourcePath = "ClientApp";

                if ( env.IsDevelopment() ) {
                    spa.UseReactDevelopmentServer( npmScript: "start" );
                }
            } );
        }
    }
}

 

appsettings.json

 {
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\mssqllocaldb;Database=aspnet-SpaTest-53bc9b9d-9d6a-45d4-8429-2a2761773502;Trusted_Connection=True;MultipleActiveResultSets=true"
  },
  "Logging": {
      "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
      }
    },
  "IdentityServer": {
    "Clients": {
      "SpaTest": {
        "Profile": "IdentityServerSPA"
      }
    }
  },
"AllowedHosts": "*"
}

 

Мысли?