107 lines
4.5 KiB
C#
107 lines
4.5 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Linq;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Dispatcher;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Routing;
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using Microsoft.AspNetCore.Routing.Dispatcher;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Options;
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namespace DispatcherSample
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{
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public class Startup
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{
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private readonly static IInlineConstraintResolver ConstraintResolver = new DefaultInlineConstraintResolver(
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new OptionsManager<RouteOptions>(
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new OptionsFactory<RouteOptions>(
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Enumerable.Empty<IConfigureOptions<RouteOptions>>(),
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Enumerable.Empty<IPostConfigureOptions<RouteOptions>>())));
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public void ConfigureServices(IServiceCollection services)
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{
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services.Configure<DispatcherOptions>(options =>
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{
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options.Dispatchers.Add(CreateDispatcher(
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"{Endpoint=example}",
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new RouteValuesEndpoint(
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new RouteValueDictionary(new { Endpoint = "First" }),
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async (context) =>
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{
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await context.Response.WriteAsync("Hello from the example!");
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},
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Array.Empty<object>(),
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"example"),
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new RouteValuesEndpoint(
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new RouteValueDictionary(new { Endpoint = "Second" }),
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async (context) =>
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{
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await context.Response.WriteAsync("Hello from the second example!");
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},
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Array.Empty<object>(),
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"example2")));
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options.Dispatchers.Add(CreateDispatcher(
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"{Endpoint=example}/{Parameter=foo}",
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new RouteValuesEndpoint(
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new RouteValueDictionary(new { Endpoint = "First", Parameter = "param1" }),
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async (context) =>
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{
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await context.Response.WriteAsync("Hello from the example for foo!");
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},
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Array.Empty<object>(),
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"example"),
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new RouteValuesEndpoint(
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new RouteValueDictionary(new { Endpoint = "Second", Parameter = "param2" }),
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async (context) =>
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{
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await context.Response.WriteAsync("Hello from the second example for foo!");
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},
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Array.Empty<object>(),
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"example2")));
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options.HandlerFactories.Add((endpoint) => (endpoint as RouteValuesEndpoint)?.HandlerFactory);
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});
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services.AddSingleton<UrlGenerator>();
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services.AddSingleton<RouteValueAddressTable>();
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services.AddDispatcher();
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}
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public void Configure(IApplicationBuilder app, IHostingEnvironment env)
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{
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app.Use(async (context, next) =>
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{
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await context.Response.WriteAsync("<p>Middleware 1</p>");
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await next.Invoke();
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});
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app.UseDispatcher();
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app.Use(async (context, next) =>
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{
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await context.Response.WriteAsync("<p>Middleware 2</p>");
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await next.Invoke();
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});
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app.Use(async (context, next) =>
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{
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var urlGenerator = app.ApplicationServices.GetService<UrlGenerator>();
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var url = urlGenerator.GenerateURL(new RouteValueDictionary(new { Movie = "The Lion King", Character = "Mufasa" }), context);
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await context.Response.WriteAsync($"<p>Generated url: {url}</p>");
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await next.Invoke();
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});
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}
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private static RequestDelegate CreateDispatcher(string routeTemplate, RouteValuesEndpoint endpoint, params RouteValuesEndpoint[] endpoints)
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{
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var dispatcher = new RouterDispatcher(new Route(new RouterEndpointSelector(new[] { endpoint }.Concat(endpoints)), routeTemplate, ConstraintResolver));
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return dispatcher.InvokeAsync;
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}
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}
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}
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