Asp.net core 5.0 - signalr 和 cloudfare 问题导致 524 状态代码

Question

我有一个问题，我使用 nginx 是我的 Web 应用程序的 Web 服务器，

我使用 signalR 从 Web 应用程序到我的服务器有 1 个连接，但连接通常会丢失连接，并且 cloudfare 返回 524 错误状态代码

任何人都可以解决此问题

更新：我已经修复了这个问题，我将 proxy_pass 从 localhost 配置为 127.0.0.1，这解决了我的问题

但是我还有另一个问题，当我查看来自我的网站的请求时，

这是我的代码

public void ConfigureServices(IServiceCollection services){

            //adding swagger
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "WebApp1", Version = "v1" });
            });

            // Adding Authentication  
            services.AddAuthentication(options =>
            {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
            })


            // Adding Jwt Bearer  
            .AddJwtBearer(options =>
            {
                options.SaveToken = true;
                options.RequireHttpsMetadata = false;
                options.TokenValidationParameters = new TokenValidationParameters()
                {
                    ValidateIssuer = false,
                    ValidateAudience = false,
                    ValidateLifetime = true,
                    //ValidAudience = Configuration["JWT:ValidAudience"],
                    //ValidIssuer = Configuration["JWT:ValidIssuer"],
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT:Secret"])),
                    RequireExpirationTime = true,
                };
            });
            //Add mysql connection
            services.AddScoped<MySqlConnection>((provider) =>
            {
                var connection = Configuration.GetConnectionString("MySql");
                return new MySqlConnection(connection);
            });

            services.AddCors(o => o.AddPolicy("CorsPolicy", builder =>
            {
                builder.WithOrigins("http://localhost:4200", "http://localhost:3000")
                          .AllowAnyHeader()
                          .AllowAnyMethod()
                          .SetIsOriginAllowed((x) => true)
                          .AllowCredentials();

            }));

            //add signalR
            services.AddSignalR(option =>
            {
                
            })
                 .AddJsonProtocol(options =>
                 {
                     options.PayloadSerializerOptions.Converters
                        .Add(new JsonStringEnumConverter());
                     options.PayloadSerializerOptions.IgnoreNullValues = true;
                 }); ;
            // In production, the React files will be served from this directory
            services.AddSpaStaticFiles(configuration =>
            {
                configuration.RootPath = "ClientApp";
            });

            services.AddControllers()
                        .AddJsonOptions(opts =>
                        {
                            var enumConverter = new JsonStringEnumConverter();
                            opts.JsonSerializerOptions.Converters.Add(enumConverter);
                            opts.JsonSerializerOptions.IgnoreNullValues = true;
                        });
        }

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseStaticFiles();
            app.UseSpaStaticFiles();


            // Make sure the CORS middleware is ahead of SignalR.
            app.UseRouting();

            app.UseAuthentication();
            app
             .UseCors("MyPolicy");


            app.UseSwagger();
            app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json",
                            "WebApp1 v1"));
            app.UseAuthorization();
            app.UseSpa(spa =>
            {
                spa.Options.SourcePath = "ClientApp";

            });
            app.UseEndpoints(endpoints =>
            {
                
                endpoints.MapHub<NotificationHub>("notify");
                endpoints.MapHub<MsgHub>("msg");
                endpoints.MapControllers();
            });
        }

我看到了 signalR 客户端的 2 个请求

https://****/notify?id=eTHEGY6Ae9_I2gSthLUcSQ (POST) 状态代码 200

https://****/notify?id=eTHEGY6Ae9_I2gSthLUcSQ&_=1648545303996 (GET) 状态代码 404

如何修复最后一个请求，不知道为什么服务器返回404