Förstå ASP.NET Core begäran och svar pipeline - Del 6: Avancerad Pipeline krokar och omfattande (Svenska (Swedish))

Förstå ASP.NET Core begäran och svar pipeline - Del 6: Avancerad Pipeline krokar och omfattande

Sunday, 09 November 2025

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13 minute read

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AI-Article ASP.NET ASP.NET Lifecycle

Inledning

Genom hela denna serie har vi utforskat ASP.NET Core pipeline från dess grunder till tillämpningsmodeller.

Nu vågar vi oss in i avancerat territorium: förlängningspunkter och krokar som låter dig anpassa rörledningen på en djup nivå.

  • Dessa avancerade tekniker gör att du kan:
  • Ändra pipeline innan ansökan startar
  • Lägg till bakgrundstjänster som körs vid sidan av din applikation
  • Skapa egna datakällor för endpointName
  • Koppla in programlivslängdshändelser

Bygg återanvändbara komponenter som integreras sömlöst med ASP.NET Core

Förstå dessa förlängningspunkter förvandlar dig från en konsument av ramverket till någon som kan utöka det för att uppfylla unika krav.

OBS: Detta är en del av mina experiment med AI / ett sätt att spendera $ 1000 Calude Code Web krediter.

graph TB
    subgraph "Application Startup"
        A1[IStartupFilter]
        A2[Configure Services]
        A3[Configure Pipeline]
    end

    subgraph "Background Processing"
        B1[IHostedService]
        B2[BackgroundService]
        B3[IHostApplicationLifetime]
    end

    subgraph "Endpoint Discovery"
        C1[EndpointDataSource]
        C2[IEndpointConventionBuilder]
        C3[IEndpointRouteBuilder]
    end

    subgraph "Request Processing"
        D1[IMiddleware]
        D2[IApplicationModelProvider]
        D3[IActionDescriptorProvider]
    end

    Start[Application Start] --> A1
    A1 --> A2
    A2 --> A3
    A3 --> B1
    B1 --> C1
    C1 --> D1

Jag har matat detta en BUNCH av papper, min förståelse, frågor jag var tvungen att generera denna artikel.

IStartupFilterDet är kul och fyller en lucka jag inte har sett fyllas någon annanstans.

Översikt över utvidgningspunkter

public class RequestTimingStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return app =>
        {
            // This middleware runs BEFORE your normal pipeline configuration
            app.Use(async (context, next) =>
            {
                var sw = Stopwatch.StartNew();
                context.Items["RequestStartTime"] = DateTime.UtcNow;

                await next(context);

                sw.Stop();
                context.Response.Headers["X-Response-Time-Ms"] = sw.ElapsedMilliseconds.ToString();
            });

            // Call the next startup filter
            next(app);

            // This middleware runs AFTER your normal pipeline configuration
            app.Use(async (context, next) =>
            {
                context.Response.Headers["X-Pipeline-End"] = "true";
                await next(context);
            });
        };
    }
}

// Register the startup filter
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSingleton<IStartupFilter, RequestTimingStartupFilter>();

var app = builder.Build();

app.MapGet("/", () => "Hello World!");

app.Run();

IStartupFilter: Ändra pipeline vid start

sequenceDiagram
    participant Request
    participant SF1 as Startup Filter 1 (Before)
    participant App as Application Middleware
    participant SF1A as Startup Filter 1 (After)
    participant Endpoint

    Request->>SF1: Enter
    Note over SF1: Added before app.Build()
    SF1->>App: Enter
    Note over App: Your middleware (app.Use...)
    App->>Endpoint: Execute endpoint
    Endpoint-->>App: Return
    App-->>SF1A: Return
    Note over SF1A: Added after next(app)
    SF1A-->>Request: Response

låter dig konfigurera middleware före eller efter programmets normala konfiguration.

public class HttpsEnforcementStartupFilter : IStartupFilter
{
    private readonly IWebHostEnvironment _env;

    public HttpsEnforcementStartupFilter(IWebHostEnvironment env)
    {
        _env = env;
    }

    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return app =>
        {
            // Only enforce HTTPS in production
            if (_env.IsProduction())
            {
                app.Use(async (context, next) =>
                {
                    if (!context.Request.IsHttps)
                    {
                        var httpsUrl = $"https://{context.Request.Host}{context.Request.Path}{context.Request.QueryString}";
                        context.Response.Redirect(httpsUrl, permanent: true);
                        return;
                    }

                    await next(context);
                });

                // Add HSTS header
                app.UseHsts();
            }

            next(app);
        };
    }
}

Grundläggande användning

// Filter 1: Logging
public class LoggingStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return app =>
        {
            app.Use(async (context, next) =>
            {
                Console.WriteLine($"[LoggingFilter] Before: {context.Request.Path}");
                await next(context);
                Console.WriteLine($"[LoggingFilter] After: {context.Response.StatusCode}");
            });

            next(app);
        };
    }
}

// Filter 2: Security headers
public class SecurityHeadersStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return app =>
        {
            app.Use(async (context, next) =>
            {
                context.Response.Headers["X-Content-Type-Options"] = "nosniff";
                context.Response.Headers["X-Frame-Options"] = "DENY";
                context.Response.Headers["X-XSS-Protection"] = "1; mode=block";

                await next(context);
            });

            next(app);
        };
    }
}

// Register both filters
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSingleton<IStartupFilter, LoggingStartupFilter>();
builder.Services.AddSingleton<IStartupFilter, SecurityHeadersStartupFilter>();

var app = builder.Build();

// Filters execute in registration order

Avrättningsorder:

IHostedServicePraktiskt exempel: Auto-HTTPS Verkställighet

Skapa flera startfilter

public class TimedHostedService : IHostedService, IDisposable
{
    private readonly ILogger<TimedHostedService> _logger;
    private Timer? _timer;
    private int _executionCount = 0;

    public TimedHostedService(ILogger<TimedHostedService> logger)
    {
        _logger = logger;
    }

    public Task StartAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Timed Hosted Service is starting");

        _timer = new Timer(DoWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(5));

        return Task.CompletedTask;
    }

    private void DoWork(object? state)
    {
        var count = Interlocked.Increment(ref _executionCount);

        _logger.LogInformation(
            "Timed Hosted Service is working. Count: {Count}",
            count);
    }

    public Task StopAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Timed Hosted Service is stopping");

        _timer?.Change(Timeout.Infinite, 0);

        return Task.CompletedTask;
    }

    public void Dispose()
    {
        _timer?.Dispose();
    }
}

// Register
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddHostedService<TimedHostedService>();
var app = builder.Build();

IHostedService: Bakgrundsuppgifter

public class QueueProcessorService : BackgroundService
{
    private readonly ILogger<QueueProcessorService> _logger;
    private readonly IServiceProvider _serviceProvider;

    public QueueProcessorService(
        ILogger<QueueProcessorService> logger,
        IServiceProvider serviceProvider)
    {
        _logger = logger;
        _serviceProvider = serviceProvider;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _logger.LogInformation("Queue Processor Service is starting");

        // Run until cancellation is requested
        while (!stoppingToken.IsCancellationRequested)
        {
            try
            {
                await ProcessQueueAsync(stoppingToken);

                // Wait before next iteration
                await Task.Delay(TimeSpan.FromSeconds(1), stoppingToken);
            }
            catch (OperationCanceledException)
            {
                // Expected when stopping
                break;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error processing queue");

                // Wait before retrying
                await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
            }
        }

        _logger.LogInformation("Queue Processor Service is stopping");
    }

    private async Task ProcessQueueAsync(CancellationToken cancellationToken)
    {
        // Create a scope for scoped services
        using var scope = _serviceProvider.CreateScope();
        var queueService = scope.ServiceProvider.GetRequiredService<IQueueService>();

        var item = await queueService.DequeueAsync(cancellationToken);

        if (item != null)
        {
            _logger.LogInformation("Processing item: {Item}", item);
            await queueService.ProcessAsync(item, cancellationToken);
        }
    }
}

möjliggör bakgrundsuppgifter som körs under programmets livstid.

public class StartupTasksService : BackgroundService
{
    private readonly ILogger<StartupTasksService> _logger;
    private readonly IHostApplicationLifetime _lifetime;
    private readonly IServiceProvider _serviceProvider;

    public StartupTasksService(
        ILogger<StartupTasksService> logger,
        IHostApplicationLifetime lifetime,
        IServiceProvider serviceProvider)
    {
        _logger = logger;
        _lifetime = lifetime;
        _serviceProvider = serviceProvider;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        // Wait for application to fully start
        await Task.Delay(100, stoppingToken);

        try
        {
            using var scope = _serviceProvider.CreateScope();

            // Run startup tasks
            await WarmUpCacheAsync(scope, stoppingToken);
            await ValidateDatabaseAsync(scope, stoppingToken);
            await LoadConfigurationAsync(scope, stoppingToken);

            _logger.LogInformation("All startup tasks completed successfully");
        }
        catch (Exception ex)
        {
            _logger.LogCritical(ex, "Startup tasks failed");

            // Stop the application if startup tasks fail
            _lifetime.StopApplication();
            return;
        }

        // Continue running for the lifetime of the application
        await Task.Delay(Timeout.Infinite, stoppingToken);
    }

    private async Task WarmUpCacheAsync(IServiceScopeScope, CancellationToken cancellationToken)
    {
        _logger.LogInformation("Warming up cache...");
        await Task.Delay(500, cancellationToken);
        _logger.LogInformation("Cache warmed up");
    }

    private async Task ValidateDatabaseAsync(IServiceScope scope, CancellationToken cancellationToken)
    {
        _logger.LogInformation("Validating database...");
        await Task.Delay(300, cancellationToken);
        _logger.LogInformation("Database validated");
    }

    private async Task LoadConfigurationAsync(IServiceScope scope, CancellationToken cancellationToken)
    {
        _logger.LogInformation("Loading configuration...");
        await Task.Delay(200, cancellationToken);
        _logger.LogInformation("Configuration loaded");
    }
}

Grundläggande värdtjänst

sequenceDiagram
    participant App as Application
    participant Lifetime as IHostApplicationLifetime
    participant Service as BackgroundService

    App->>Lifetime: Application starting
    Lifetime->>Service: StartAsync()
    Service->>Service: ExecuteAsync() begins

    Note over App,Service: Application running

    Lifetime->>Lifetime: ApplicationStarted event

    Note over Service: Background work continues

    App->>Lifetime: Shutdown requested
    Lifetime->>Lifetime: ApplicationStopping event
    Lifetime->>Service: StopAsync()
    Service->>Service: Cancel ExecuteAsync()
    Service-->>Lifetime: Stopped

    Lifetime->>Lifetime: ApplicationStopped event
    App->>App: Exit

Bakgrundstjänst: Förenklade bakgrundsuppgifter

Samordning med applikationen Livstid

public class PluginEndpointDataSource : EndpointDataSource
{
    private readonly List<Endpoint> _endpoints = new();
    private readonly IChangeToken _changeToken = NullChangeToken.Singleton;

    public PluginEndpointDataSource()
    {
        // Discover plugins and create endpoints
        DiscoverPlugins();
    }

    public override IReadOnlyList<Endpoint> Endpoints => _endpoints;

    public override IChangeToken GetChangeToken() => _changeToken;

    private void DiscoverPlugins()
    {
        // Example: Create endpoints for each discovered plugin
        var plugins = new[]
        {
            new { Name = "Plugin1", Path = "/plugins/plugin1" },
            new { Name = "Plugin2", Path = "/plugins/plugin2" }
        };

        foreach (var plugin in plugins)
        {
            var requestDelegate = CreatePluginDelegate(plugin.Name);

            var routeEndpoint = new RouteEndpoint(
                requestDelegate,
                RoutePatternFactory.Parse(plugin.Path),
                order: 0,
                new EndpointMetadataCollection(
                    new DisplayNameMetadata(plugin.Name)),
                displayName: plugin.Name);

            _endpoints.Add(routeEndpoint);
        }
    }

    private RequestDelegate CreatePluginDelegate(string pluginName)
    {
        return async context =>
        {
            await context.Response.WriteAsJsonAsync(new
            {
                plugin = pluginName,
                message = $"Response from {pluginName}",
                timestamp = DateTime.UtcNow
            });
        };
    }
}

// Register the endpoint data source
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSingleton<EndpointDataSource, PluginEndpointDataSource>();

var app = builder.Build();

// Endpoints from PluginEndpointDataSource are automatically available

app.Run();

Livscykelvisualisering:

public class DatabaseEndpointDataSource : EndpointDataSource
{
    private readonly List<Endpoint> _endpoints = new();
    private CancellationTokenSource _cts = new();
    private IChangeToken _changeToken;

    public DatabaseEndpointDataSource(IServiceProvider serviceProvider)
    {
        _changeToken = new CancellationChangeToken(_cts.Token);

        // Load endpoints from database
        LoadEndpointsFromDatabase(serviceProvider);

        // Set up periodic refresh
        Task.Run(async () =>
        {
            while (true)
            {
                await Task.Delay(TimeSpan.FromMinutes(5));
                ReloadEndpoints(serviceProvider);
            }
        });
    }

    public override IReadOnlyList<Endpoint> Endpoints => _endpoints;

    public override IChangeToken GetChangeToken() => _changeToken;

    private void LoadEndpointsFromDatabase(IServiceProvider serviceProvider)
    {
        using var scope = serviceProvider.CreateScope();

        // Simulate loading from database
        var routes = new[]
        {
            new { Path = "/dynamic/users", Handler = "GetUsers" },
            new { Path = "/dynamic/products", Handler = "GetProducts" }
        };

        _endpoints.Clear();

        foreach (var route in routes)
        {
            var requestDelegate = CreateDynamicDelegate(route.Handler);

            var endpoint = new RouteEndpoint(
                requestDelegate,
                RoutePatternFactory.Parse(route.Path),
                order: 0,
                new EndpointMetadataCollection(),
                displayName: route.Handler);

            _endpoints.Add(endpoint);
        }
    }

    private void ReloadEndpoints(IServiceProvider serviceProvider)
    {
        LoadEndpointsFromDatabase(serviceProvider);

        // Notify of changes
        var oldCts = _cts;
        _cts = new CancellationTokenSource();
        _changeToken = new CancellationChangeToken(_cts.Token);
        oldCts.Cancel();
    }

    private RequestDelegate CreateDynamicDelegate(string handler)
    {
        return async context =>
        {
            await context.Response.WriteAsJsonAsync(new
            {
                handler,
                message = $"Dynamic endpoint: {handler}",
                path = context.Request.Path.Value
            });
        };
    }
}

Anpassade datakällor för endpointName

Skapa dynamiska endpoints som upptäcks vid körning:IMiddlewareDynamisk slutpunktsgenerering

public class DatabaseHealthCheckMiddleware : IMiddleware
{
    private readonly ILogger<DatabaseHealthCheckMiddleware> _logger;

    // Can inject scoped services
    public DatabaseHealthCheckMiddleware(ILogger<DatabaseHealthCheckMiddleware> logger)
    {
        _logger = logger;
    }

    public async Task InvokeAsync(HttpContext context, RequestDelegate next)
    {
        if (context.Request.Path == "/health/db")
        {
            // Can resolve scoped services from context
            var dbContext = context.RequestServices.GetRequiredService<MyDbContext>();

            try
            {
                await dbContext.Database.CanConnectAsync();

                context.Response.StatusCode = 200;
                await context.Response.WriteAsJsonAsync(new
                {
                    status = "healthy",
                    database = "connected",
                    timestamp = DateTime.UtcNow
                });
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Database health check failed");

                context.Response.StatusCode = 503;
                await context.Response.WriteAsJsonAsync(new
                {
                    status = "unhealthy",
                    database = "disconnected",
                    error = ex.Message
                });
            }

            return;
        }

        await next(context);
    }
}

// Register
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddScoped<DatabaseHealthCheckMiddleware>();

var app = builder.Build();

app.UseMiddleware<DatabaseHealthCheckMiddleware>();

app.Run();

Imiddleware: Klassbaserad Middleware med DI

Till skillnad från konventionsbaserade middleware,

public class CustomApplicationModelProvider : IApplicationModelProvider
{
    public int Order => -1000 + 10; // Run after default provider

    public void OnProvidersExecuting(ApplicationModelProviderContext context)
    {
        // Runs before the default provider
        foreach (var controller in context.Result.Controllers)
        {
            // Add custom route prefix to all controllers
            controller.Selectors.Add(new SelectorModel
            {
                AttributeRouteModel = new AttributeRouteModel
                {
                    Template = "api/v2/[controller]"
                }
            });
        }
    }

    public void OnProvidersExecuted(ApplicationModelProviderContext context)
    {
        // Runs after the default provider
        foreach (var controller in context.Result.Controllers)
        {
            // Add custom metadata to all actions
            foreach (var action in controller.Actions)
            {
                action.Properties["CustomProperty"] = "CustomValue";
            }
        }
    }
}

// Register
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllersWithViews(options =>
{
    options.ModelMetadataDetailsProviders.Add(
        new CustomApplicationModelProvider());
});

stöder helt beroendeinjektion:

Tillämpningsmodellleverantörer

public class DynamicActionDescriptorProvider : IActionDescriptorProvider
{
    public int Order => -1000; // Run early

    public void OnProvidersExecuting(ActionDescriptorProviderContext context)
    {
        // Add dynamic actions
        context.Results.Add(new ActionDescriptor
        {
            RouteValues = new Dictionary<string, string>
            {
                ["controller"] = "Dynamic",
                ["action"] = "Generated"
            },
            DisplayName = "Dynamic Generated Action",
            AttributeRouteInfo = new AttributeRouteInfo
            {
                Template = "dynamic/generated"
            }
        });
    }

    public void OnProvidersExecuted(ActionDescriptorProviderContext context)
    {
        // Modify existing actions
        foreach (var action in context.Results)
        {
            // Add custom metadata
            action.Properties["Timestamp"] = DateTime.UtcNow;
        }
    }
}

Anpassa hur MVC upptäcker och konfigurerar styrenheter och åtgärder:

Leverantörer av åtgärdsdeskriptorer

public class PluginFeatureProvider : IApplicationFeatureProvider<ControllerFeature>
{
    public void PopulateFeature(IEnumerable<ApplicationPart> parts, ControllerFeature feature)
    {
        // Load plugin assemblies
        var pluginPath = Path.Combine(AppContext.BaseDirectory, "Plugins");

        if (!Directory.Exists(pluginPath))
            return;

        var pluginAssemblies = Directory.GetFiles(pluginPath, "*.dll")
            .Select(Assembly.LoadFrom);

        foreach (var assembly in pluginAssemblies)
        {
            var controllers = assembly.GetTypes()
                .Where(t => typeof(Controller).IsAssignableFrom(t) && !t.IsAbstract);

            foreach (var controller in controllers)
            {
                feature.Controllers.Add(controller.GetTypeInfo());
            }
        }
    }
}

// Register
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllersWithViews()
    .ConfigureApplicationPartManager(manager =>
    {
        manager.FeatureProviders.Add(new PluginFeatureProvider());
    });

Dynamiskt lägga till eller ändra åtgärdsdeskriptorer:

Leverantörer av funktioner

public class RequireApiKeyConvention : IEndpointConventionBuilder
{
    private readonly List<Action<EndpointBuilder>> _conventions = new();

    public void Add(Action<EndpointBuilder> convention)
    {
        _conventions.Add(convention);
    }

    public void ApplyConventions(EndpointBuilder builder)
    {
        foreach (var convention in _conventions)
        {
            convention(builder);
        }
    }
}

// Usage
var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

var apiGroup = app.MapGroup("/api")
    .WithMetadata(new RequiresApiKeyMetadata())
    .AddEndpointFilter(async (context, next) =>
    {
        var apiKey = context.HttpContext.Request.Headers["X-API-Key"].FirstOrDefault();

        if (string.IsNullOrEmpty(apiKey))
        {
            return Results.Unauthorized();
        }

        return await next(context);
    });

apiGroup.MapGet("/data", () => new { data = "Protected data" });

app.Run();

class RequiresApiKeyMetadata { }

Kontroll av vilka enheter och typer som skannas för styrenheter:

Slutpunktskonventioner

// Plugin interface
public interface IPlugin
{
    string Name { get; }
    string Version { get; }
    void ConfigureServices(IServiceCollection services);
    void ConfigureRoutes(IEndpointRouteBuilder endpoints);
}

// Plugin discovery service
public class PluginLoader : BackgroundService
{
    private readonly ILogger<PluginLoader> _logger;
    private readonly IServiceProvider _serviceProvider;
    private readonly List<IPlugin> _plugins = new();

    public PluginLoader(ILogger<PluginLoader> logger, IServiceProvider serviceProvider)
    {
        _logger = logger;
        _serviceProvider = serviceProvider;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _logger.LogInformation("Loading plugins...");

        var pluginPath = Path.Combine(AppContext.BaseDirectory, "Plugins");

        if (Directory.Exists(pluginPath))
        {
            var pluginAssemblies = Directory.GetFiles(pluginPath, "*.dll")
                .Select(Assembly.LoadFrom);

            foreach (var assembly in pluginAssemblies)
            {
                var pluginTypes = assembly.GetTypes()
                    .Where(t => typeof(IPlugin).IsAssignableFrom(t) && !t.IsAbstract);

                foreach (var type in pluginTypes)
                {
                    var plugin = (IPlugin)Activator.CreateInstance(type)!;
                    _plugins.Add(plugin);

                    _logger.LogInformation(
                        "Loaded plugin: {Name} v{Version}",
                        plugin.Name,
                        plugin.Version);
                }
            }
        }

        _logger.LogInformation("Loaded {Count} plugins", _plugins.Count);

        await Task.CompletedTask;
    }

    public IReadOnlyList<IPlugin> GetPlugins() => _plugins;
}

// Startup filter that configures plugins
public class PluginStartupFilter : IStartupFilter
{
    private readonly PluginLoader _pluginLoader;

    public PluginStartupFilter(PluginLoader pluginLoader)
    {
        _pluginLoader = pluginLoader;
    }

    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return app =>
        {
            next(app);

            // Configure plugin routes after main application
            var plugins = _pluginLoader.GetPlugins();

            foreach (var plugin in plugins)
            {
                app.UseRouting();
                app.UseEndpoints(endpoints =>
                {
                    plugin.ConfigureRoutes(endpoints);
                });
            }
        };
    }
}

// Register everything
var builder = WebApplication.CreateBuilder(args);

// Register plugin system
var pluginLoader = new PluginLoader(
    builder.Services.BuildServiceProvider().GetRequiredService<ILogger<PluginLoader>>(),
    builder.Services.BuildServiceProvider());

builder.Services.AddSingleton(pluginLoader);
builder.Services.AddHostedService(sp => sp.GetRequiredService<PluginLoader>());
builder.Services.AddSingleton<IStartupFilter, PluginStartupFilter>();

var app = builder.Build();

app.MapGet("/plugins", (PluginLoader loader) =>
{
    var plugins = loader.GetPlugins();

    return plugins.Select(p => new
    {
        p.Name,
        p.Version
    });
});

app.Run();

Tillämpa metadata och konfiguration för endpoints:

  • Praktiskt exempel: Komplett förlängningssystemLåt oss bygga ett komplett plugin-system:
  • NyckeluttagningarIStartFilter
  • ändrar rörledningen före och efter normal konfigurationIHostedService/Bakgrundstjänst
  • möjliggör bakgrundsuppgifter under hela applikationens livstidEgen slutpunktDatakälla
  • skapar dynamiska, upptäckbara slutpunkterIMiddleware Ordförande
  • ger fullt DI-stöd för mellanprogramTillämpningsmodellleverantörer
  • anpassa MVC-styrenhet/åtgärdsupptäcktLeverantörer av funktioner
  • kontrollera vilka typer som skannas som styrenheter

Slutpunktskonventioner

tillämpa metadata och konfiguration för endpoints

Dessa förlängningspunkter arbetar tillsammans för att skapa sofistikerade, pluggable arkitekturer

  1. **Förstå dessa avancerade krokar ger dig möjlighet att bygga ramar ovanpå ASP.NET Core, skapa plugin-system och anpassa rörledningen för att uppfylla unika krav.**Serieslutsatser
  2. **Genom denna sexdelade serie har vi färdats genom varje lager av ASP.NET Core begäran och svar pipeline:**Häfte 1
  3. : Etablerad grund och mental modellHäfte 2
  4. : Utforskad Kestrel och värdskiktetHäfte 3
  5. : Bearbetade mellanprodukter och processledningenHäfte 4
  6. : Lärd routing och målmatchningHäfte 5

: Undersökt MVC, Razor sidor och minimala API:er

Häfte 6

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