Asp.Net核心从url获取RouteData值-Java 学习之路

我想通过创建自定义 IRequestCultureProvider 来管理我的应用的本地化，如下所示：

public class MyCustomRequestCultureProvider : IRequestCultureProvider
    {
        public Task<ProviderCultureResult> DetermineProviderCultureResult(HttpContext httpContext)
        {
            var language= httpContext.GetRouteValue("language");

            var result = new ProviderCultureResult(language, language);
            return Task.FromResult(result);
        }
    }

我的 MyCustomRequestCultureProvider 在每个请求都被点击，这没关系 . 我的问题是在MVC管道中，我的提供程序的 DetermineProviderCultureResult 方法在路由进程之前被命中，因此 httpContext.GetRouteValue("language") 总是返回null .

在以前版本的MVC中，我有可能通过这样做来通过路由过程手动处理我的url

var wrapper = new HttpContextWrapper(HttpContext.Current);
var routeData = RouteTable.Routes.GetRouteData(wrapper);
var language = routeData.GetValue("language")

我现在找不到在新的framewrok中做同样事情的方法 . 此外，我想使用路由数据找出我的langugae，用一些字符串函数分析我的url字符串，以找到语言不是一个选项 .

2 回答

尚未决定实施此功能 . IRoutingFeature 仅在MVC完成请求后可用 .

我能够整理出一个适合你的解决方案 . 这将设置您传入 UseMvc() 的路线以及所有属性路由以填充IRoutingFeature . 完成后，您可以通过 httpContext.GetRouteValue("language"); 访问该类 .

Startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    // setup routes
    app.UseGetRoutesMiddleware(GetRoutes);

    // add localization
    var requestLocalizationOptions = new RequestLocalizationOptions
    {
        DefaultRequestCulture = new RequestCulture("en-US")
    };
    requestLocalizationOptions.RequestCultureProviders.Clear();
    requestLocalizationOptions.RequestCultureProviders.Add(
        new MyCustomRequestCultureProvider()
    );
    app.UseRequestLocalization(requestLocalizationOptions);

    // add mvc
    app.UseMvc(GetRoutes);
}

将路由移动到委托（用于可重用），相同的文件/类：

private readonly Action<IRouteBuilder> GetRoutes =
    routes =>
    {
        routes.MapRoute(
            name: "custom",
            template: "{language=fr-FR}/{controller=Home}/{action=Index}/{id?}");

        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    };

Add new middleware:

public static class GetRoutesMiddlewareExtensions
{
    public static IApplicationBuilder UseGetRoutesMiddleware(this IApplicationBuilder app, Action<IRouteBuilder> configureRoutes)
    {
        if (app == null)
        {
            throw new ArgumentNullException(nameof(app));
        }

        var routes = new RouteBuilder(app)
        {
            DefaultHandler = app.ApplicationServices.GetRequiredService<MvcRouteHandler>(),
        };
        configureRoutes(routes);
        routes.Routes.Insert(0, AttributeRouting.CreateAttributeMegaRoute(app.ApplicationServices));
        var router = routes.Build();

        return app.UseMiddleware<GetRoutesMiddleware>(router);
    }
}

public class GetRoutesMiddleware
{
    private readonly RequestDelegate next;
    private readonly IRouter _router;

    public GetRoutesMiddleware(RequestDelegate next, IRouter router)
    {
        this.next = next;
        _router = router;
    }

    public async Task Invoke(HttpContext httpContext)
    {
        var context = new RouteContext(httpContext);
        context.RouteData.Routers.Add(_router);

        await _router.RouteAsync(context);

        if (context.Handler != null)
        {
            httpContext.Features[typeof (IRoutingFeature)] = new RoutingFeature()
            {
                RouteData = context.RouteData,
            };
        }

        // proceed to next...
        await next(httpContext);
    }
}

您可能还必须定义此类...

public class RoutingFeature : IRoutingFeature
{
    public RouteData RouteData { get; set; }
}

回复于 2024-05-10T09:45:18+08:00

根据Ashley Lee的回答，这是一种防止重复路由配置的优化方法 .

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
   // setup routes
   var mvcRouter = BuildMvcRouter(app, routes =>
   {
       routes.MapRoute(
           name: "custom",
           template: "{language=fr-FR}/{controller=Home}/{action=Index}/{id?}");
       routes.MapRoute(
           name: "default",
           template: "{controller=Home}/{action=Index}/{id?}");
    };

    // add route data initialization middleware
    app.Use(next => SetRouteData(next, mvcRouter));

    // add localization middleware
    var requestLocalizationOptions = new RequestLocalizationOptions
    {
        DefaultRequestCulture = new RequestCulture("en-US")
    };
    requestLocalizationOptions.RequestCultureProviders.Clear();
    requestLocalizationOptions.RequestCultureProviders.Add(
        new MyCustomRequestCultureProvider()
    );
    app.UseRequestLocalization(requestLocalizationOptions);

    // add mvc routing middleware
    app.UseRouter(mvcRouter);
}

这取决于必须添加到StartUp类的以下两个方法：

private static IRouter BuildMvcRouter(IApplicationBuilder app, Action<IRouteBuilder> configureRoutes)
{
    if (app == null) throw new ArgumentNullException(nameof(app));
    if (configureRoutes == null) throw new ArgumentNullException(nameof(configureRoutes));

    app.ApplicationServices.GetRequiredService<MiddlewareFilterBuilder>().ApplicationBuilder = app.New();
    RouteBuilder routeBuilder = new RouteBuilder(app)
    {
        DefaultHandler = app.ApplicationServices.GetRequiredService<MvcRouteHandler>()
    };
    configureRoutes((IRouteBuilder)routeBuilder);
    routeBuilder.Routes.Insert(0, AttributeRouting.CreateAttributeMegaRoute(app.ApplicationServices));

    return routeBuilder.Build();
}

private static RequestDelegate SetRouteData(RequestDelegate next, IRouter router)
{
    return async context =>
    {
        var routeContext = new RouteContext(context);
        await router.RouteAsync(routeContext);

        if (routeContext.Handler != null)
        {
            context.Features[typeof(IRoutingFeature)] = new RoutingFeature()
            {
                RouteData = routeContext.RouteData
            };
        }

        await next(context);
    };
}

回复于 2024-05-10T09:45:18+08:00

Asp.Net核心从url获取RouteData值

2 回答

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