WebSocket with asp.net boilerplate framework

Question

I'm trying to use a native WebSocket with asp.net boilerplate (.NET Core 5) but the problem is the WebSocket always returns 0 status for the WebSocket client, and on PostMan the status keeps CONNECTING

I don't have any errors and I added the configuration properly as below:

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
        {

            app.UseWebSockets();
            app.Use(async (context, next) => {
                if (context.WebSockets.IsWebSocketRequest)
                {
                    WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();

                }
                else
                {
                    await next();
                }
            });

            app.UseAbp(options => { options.UseAbpRequestLocalization = false; }); // Initializes ABP framework.

            app.UseCors(_defaultCorsPolicyName); // Enable CORS!

            app.UseStaticFiles();

            app.UseRouting();

            app.UseAuthentication();

            app.UseAbpRequestLocalization();


            app.UseEndpoints(endpoints =>
            {
                endpoints.MapHub<AbpCommonHub>("/signalr");
                endpoints.MapControllerRoute("default", "{controller=Home}/{action=Index}/{id?}");
                endpoints.MapControllerRoute("defaultWithArea", "{area}/{controller=Home}/{action=Index}/{id?}");
            });

            // Enable middleware to serve generated Swagger as a JSON endpoint
            app.UseSwagger(c => { c.RouteTemplate = "swagger/{documentName}/swagger.json"; });

            // Enable middleware to serve swagger-ui assets (HTML, JS, CSS etc.)
            app.UseSwaggerUI(options =>
            {
                // specifying the Swagger JSON endpoint.
                options.SwaggerEndpoint($"/swagger/{_apiVersion}/swagger.json", $"LocateCRM API {_apiVersion}");
                options.IndexStream = () => Assembly.GetExecutingAssembly()
                    .GetManifestResourceStream("LocateCRM.Web.Host.wwwroot.swagger.ui.index.html");
                options.DisplayRequestDuration(); // Controls the display of the request duration (in milliseconds) for "Try it out" requests.  
            }); // URL: /swagger


           
        }

Is there any issue with my configuration:

 app.UseWebSockets();
            app.Use(async (context, next) => {
                if (context.WebSockets.IsWebSocketRequest)
                {
                    WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();

                }
                else
                {
                    await next();
                }
            });

Answer 1

The issue was in the path that I'm using in the client side:

it was

ws://localhost:4200

and it has to be

ws://localhost:4200/ws