ASP .NET Core启动流程

builder.Build()

configure(builder)

Build

IServiceCollection hostingServices=BuildCommonService();

IWebHostBuilder

startupFailters.Reverse()

WebHostBuilder

Run（）

WebHost

EnsureStartup()

Initialize()

_hostedServiceExecutor = _applicationServices.GetRequiredService();

UseDefaultServiceProvider()

WebHost.CreateDefaultBuild()

_startup.ConfigureServices()

Actionconfigure=_startup.Configure;

EnsureApplicationServices()

EnsureServer()

WebHost StartAsync()

UserIISIntegration()

BuildApplication()

CreateDefaultBuilder

var host=new WebHost();

Run()

IWebHost

IFeatureCollection ServerFeatures { get; } IServiceProvider Services { get; } void Start(); Task StartAsync(CancellationToken cancellationToken = default(CancellationToken));Task StopAsync(CancellationToken cancellationToken = default(CancellationToken));

ConfigureAppConfiguration()

UseKestrel()

UserContentRoot()

host.Initiallize();

IServer Server=_application.GetRequiredService(Iserver);

Main()

_hostedServiceExecutor.StartAsync(cancellationToken).ConfigureAwait(false)

BuildWebHost(args)

Build()

UserStartUp()

_application==null?

IApplicationBuilder builder=builderFactory.CreateVuilder(Server.Features):