如何拦截的URL来动态改变路由 [英] How to intercept a Url to dynamically change the routing

问题描述

我希望做的是这样的：

有关类别中，控制器将 CategoryController

For categories where the Controller will be CategoryController

www.mysite.com/some-category
www.mysite.com/some-category/sub-category
www.mysite.com/some-category/sub-category/another //This could go on ..

问题是： www.mysite.com/some-product 需要指向一个 ProductController的。通常这会映射到相同的控制器。

The problem is that: www.mysite.com/some-product needs to point to a ProductController. Normally this would map to the same controller.

所以，我怎么能拦截路由，所以我可以检查，如果该参数是一个相应类别或产品和路线。

So, how can I intercept the routing so I can check if the parameter is a Category or Product and route accordingly.

我试图避免类似 www.mysite.com/category/some-category 或 www.mysite.com/product/一些产品，因为我觉得它会执行对SEO侧更好。当我可以拦截路由，我会转发给基于某些规则看蛞蝓每个等产品/类别。

I am trying to avoid having something like www.mysite.com/category/some-category or www.mysite.com/product/some-product as I feel it will perform better on the SEO side. When I can intercept the routing, I'll forward to a product / category based on some rules that look at slugs for each etc.

推荐答案

您可以编写一个自定义的路由达到这个目的：

You could write a custom route to serve this purpose:

public class CategoriesRoute: Route
{
    public CategoriesRoute()
        : base("{*categories}", new MvcRouteHandler())
    {
    }

    public override RouteData GetRouteData(HttpContextBase httpContext)
    {
        var rd = base.GetRouteData(httpContext);
        if (rd == null)
        {
            return null;
        }

        string categories = rd.Values["categories"] as string;
        if (string.IsNullOrEmpty(categories) || !categories.StartsWith("some-", StringComparison.InvariantCultureIgnoreCase))
        {
            // The url doesn't start with some- as per our requirement =>
            // we have no match for this route
            return null;
        }

        string[] parts = categories.Split('/');

        // for each of the parts go hit your categoryService to determine whether
        // this is a category slug or something else and return accordingly
       if (!AreValidCategories(parts)) 
       {
           // The AreValidCategories custom method indicated that the route contained
           // some parts which are not categories => we have no match for this route
           return null;
       }

        // At this stage we know that all the parts of the url are valid categories =>
        // we have a match for this route and we can pass the categories to the action
        rd.Values["controller"] = "Category";
        rd.Values["action"] = "Index";
        rd.Values["categories"] = parts;

        return rd;
    }
}

这将注册这样的：

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.Add("CategoriesRoute", new CategoriesRoute());

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
}

然后你就可以有相应的控制器：

and then you can have the corresponding controller:

public class CategoryController: Controller
{
    public ActionResult Index(string[] categories)
    {
        ... The categories action argument will contain a list of the provided categories
            in the url
    }
}

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