Question

我有一个Web API应用程序，在2.1中可以正常工作。我正在使用同一应用程序在Windows上的IIS中托管，而在Linux上没有IIS。现在，我正在尝试升级该应用程序。

我已经成功升级了nuget软件包和项目版本。现在尝试调试应用程序时，我的配置启动类出现了一些问题，如下所示

public static void Main(string[] args)
{

            StartupShutdownHandler.BuildWebHost(args).Build().Run();
}


namespace MyApp
{
    public class StartupShutdownHandler
    {

        public static IWebHostBuilder BuildWebHost(string[] args) => WebHost.CreateDefaultBuilder(args)
               .UseStartup<StartupShutdownHandler>();

        private static readonly ILog Logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        private const string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";

        public StartupShutdownHandler(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.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            //services.AddMvc(options => { options.RespectBrowserAcceptHeader = true; }).AddXmlSerializerFormatters().AddXmlDataContractSerializerFormatters(); //this is changed in 3.0
            services.AddMvc(options => { options.RespectBrowserAcceptHeader = true; }).AddXmlSerializerFormatters().AddXmlDataContractSerializerFormatters().SetCompatibilityVersion(Microsoft.AspNetCore.Mvc.CompatibilityVersion.Version_3_0);

            CorsRelatedPolicyAddition(services);
        }

        private void CorsRelatedPolicyAddition(IServiceCollection services)
        {
            var lstofCors = ConfigurationHandler.GetSection<List<string>>(StringConstants.AppSettingsKeys.CorsWhitelistedUrl);
            if (lstofCors != null && lstofCors.Count > 0 && lstofCors.Any(h => !string.IsNullOrWhiteSpace(h)))
            {                
                services.AddCors(options =>
                {
                    options.AddPolicy(MyAllowSpecificOrigins, builder => { builder.WithOrigins(lstofCors.ToArray()).AllowAnyMethod().AllowAnyHeader(); });
                });

            }
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IHostApplicationLifetime applicationLifetime)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseCors(MyAllowSpecificOrigins);
            //app.UseMvc(); //this is changed in 3.0
            applicationLifetime.ApplicationStarted.Register(StartedApplication);
            applicationLifetime.ApplicationStopping.Register(OnShutdown);
        }


        private void OnShutdown()
        {
             Logger.Debug("Application Shutdown");
        }

        private void StartedApplication()
        {
            Logger.Debug("Application Started");
        }
    }
}

我尝试将一些行注释掉，因为它在// 3.0中已更改，但是它不起作用。请找出问题所在

Answer 1

以下更改最终适用于2.1到3.0的路径。我正在做的一项手动更改是在不中断的所有地方将newtonsoft更新为新的内置json类型（例如，在一种情况下，我必须在序列化请求的Formcollection和QueryCollection时仍使用newtonsoft）

namespace MyApp.Interfaces
{
    public class StartupShutdownHandler
    {

        public static IWebHostBuilder BuildWebHost(string[] args) => WebHost.CreateDefaultBuilder(args).
            ConfigureKestrel(serverOptions =>{}).UseIISIntegration()
            .UseStartup<StartupShutdownHandler>();

        private static readonly ILog Logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        private const string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";


        public StartupShutdownHandler(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.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddControllers(options => options.RespectBrowserAcceptHeader = true).AddXmlSerializerFormatters().AddXmlDataContractSerializerFormatters(); //updated            
            CorsRelatedPolicyAddition(services);
        }

        private void CorsRelatedPolicyAddition(IServiceCollection services)
        {
            var lstofCors = ConfigurationHandler.GetSection<List<string>>(StringConstants.AppSettingsKeys.CorsWhitelistedUrl);
            if (lstofCors != null && lstofCors.Count > 0 && lstofCors.Any(h => !string.IsNullOrWhiteSpace(h)))
            {
                services.AddCors(options =>
                {
                    options.AddPolicy(MyAllowSpecificOrigins, builder => { builder.WithOrigins(lstofCors.ToArray()).AllowAnyMethod().AllowAnyHeader(); });
                });

            }
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IHostApplicationLifetime applicationLifetime)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseRouting();
            app.UseCors(MyAllowSpecificOrigins);
            app.UseEndpoints(endpoints =>
            {                
                endpoints.MapControllerRoute("default", "{controller=Home}/{action=Index}/{id?}");
            });            
            applicationLifetime.ApplicationStarted.Register(StartedApplication);
            applicationLifetime.ApplicationStopping.Register(OnShutdown);
        }


        private void OnShutdown()
        {
             Logger.Debug("Application Ended");
        }

        private void StartedApplication()
        {
            Logger.Debug("Application Started");
        }
    }
}

从Asp.net Core 2.1升级到Asp.net 3.0

1 个答案: