コード例 #1
0
ファイル: WebHost.cs プロジェクト: lzhang871228/aspnetcore
        public virtual async Task StartAsync(CancellationToken cancellationToken = default)
        {
            Debug.Assert(_applicationServices != null, "Initialize must be called first.");

            HostingEventSource.Log.HostStart();
            _logger = _applicationServices.GetRequiredService <ILoggerFactory>().CreateLogger("Microsoft.AspNetCore.Hosting.Diagnostics");
            _logger.Starting();

            var application = BuildApplication();

            _applicationLifetime   = _applicationServices.GetRequiredService <ApplicationLifetime>();
            _hostedServiceExecutor = _applicationServices.GetRequiredService <HostedServiceExecutor>();

            // Fire IHostedService.Start
            await _hostedServiceExecutor.StartAsync(cancellationToken).ConfigureAwait(false);

            var diagnosticSource   = _applicationServices.GetRequiredService <DiagnosticListener>();
            var activitySource     = _applicationServices.GetRequiredService <ActivitySource>();
            var httpContextFactory = _applicationServices.GetRequiredService <IHttpContextFactory>();
            var hostingApp         = new HostingApplication(application, _logger, diagnosticSource, activitySource, httpContextFactory);
            await Server.StartAsync(hostingApp, cancellationToken).ConfigureAwait(false);

            _startedServer = true;

            // Fire IApplicationLifetime.Started
            _applicationLifetime?.NotifyStarted();


            _logger.Started();

            // Log the fact that we did load hosting startup assemblies.
            if (_logger.IsEnabled(LogLevel.Debug))
            {
                foreach (var assembly in _options.GetFinalHostingStartupAssemblies())
                {
                    _logger.StartupAssemblyLoaded(assembly);
                }
            }

            if (_hostingStartupErrors != null)
            {
                foreach (var exception in _hostingStartupErrors.InnerExceptions)
                {
                    _logger.HostingStartupAssemblyError(exception);
                }
            }
        }
コード例 #2
0
        public async Task StartAsync(CancellationToken cancellationToken)
        {
            HostingEventSource.Log.HostStart();

            var serverAddressesFeature = Server.Features?.Get <IServerAddressesFeature>();
            var addresses = serverAddressesFeature?.Addresses;

            if (addresses != null && !addresses.IsReadOnly && addresses.Count == 0)
            {
                var urls = Configuration[WebHostDefaults.ServerUrlsKey];
                if (!string.IsNullOrEmpty(urls))
                {
                    serverAddressesFeature.PreferHostingUrls = WebHostUtilities.ParseBool(Configuration, WebHostDefaults.PreferHostingUrlsKey);

                    foreach (var value in urls.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries))
                    {
                        addresses.Add(value);
                    }
                }
            }

            RequestDelegate application = null;

            try
            {
                Action <IApplicationBuilder> configure = Options.ConfigureApplication;

                if (configure == null)
                {
                    throw new InvalidOperationException($"No application configured. Please specify an application via IWebHostBuilder.UseStartup, IWebHostBuilder.Configure, or specifying the startup assembly via {nameof(WebHostDefaults.StartupAssemblyKey)} in the web host configuration.");
                }

                var builder = ApplicationBuilderFactory.CreateBuilder(Server.Features);

                foreach (var filter in StartupFilters.Reverse())
                {
                    configure = filter.Configure(configure);
                }

                configure(builder);

                // Build the request pipeline
                application = builder.Build();
            }
            catch (Exception ex)
            {
                Logger.ApplicationError(ex);

                if (!Options.WebHostOptions.CaptureStartupErrors)
                {
                    throw;
                }

                application = BuildErrorPageApplication(ex);
            }

            var httpApplication = new HostingApplication(application, Logger, DiagnosticListener, HttpContextFactory);

            await Server.StartAsync(httpApplication, cancellationToken);

            if (addresses != null)
            {
                foreach (var address in addresses)
                {
                    LifetimeLogger.LogInformation("Now listening on: {address}", address);
                }
            }

            if (Logger.IsEnabled(LogLevel.Debug))
            {
                foreach (var assembly in Options.WebHostOptions.GetFinalHostingStartupAssemblies())
                {
                    Logger.LogDebug("Loaded hosting startup assembly {assemblyName}", assembly);
                }
            }

            if (Options.HostingStartupExceptions != null)
            {
                foreach (var exception in Options.HostingStartupExceptions.InnerExceptions)
                {
                    Logger.HostingStartupAssemblyError(exception);
                }
            }
        }