路由映射到不同路由的参数

Question

我正在尝试为我的ASP.NET MVC 5项目设置一些路由.

• 我定义了自定义路由以获得不错的博客文章永久链接 - 这些似乎工作得很好
• 我添加了一个XmlRpc Handler(类似于在Mads的Miniblog和Scott的帖子中完成的操作)

现在我有一些奇怪的行为:

• /Home/About 正确路由
• /Home/Index 被路由到 /XmlRpc?action=Index&controller=Blog
• /HOme/Index 工作(是的,我发现由于一个错字) - 我一直认为路由不区分大小写？
• 使用Url.Action("Foo","Bar")也创造/XmlRpc?action=Foo&controller=Bar

这是我的RouteConfig档案:

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

    routes.Add("XmlRpc", new Route("XmlRpc", new MetaWeblogRouteHandler()));

    routes.MapRoute("Post", "Post/{year}/{month}/{day}/{id}", new {controller = "Blog", action = "Post"}, new {year = @"\d{4,4}", month = @"\d{1,2}", day = @"\d{1,2}", id = @"(\w+-?)*"});
    routes.MapRoute("Posts on Day", "Post/{year}/{month}/{day}", new {controller = "Blog", action = "PostsOnDay"}, new {year = @"\d{4,4}", month = @"\d{1,2}", day = @"\d{1,2}"});
    routes.MapRoute("Posts in Month", "Post/{year}/{month}", new {controller = "Blog", action = "PostsInMonth"}, new {year = @"\d{4,4}", month = @"\d{1,2"});
    routes.MapRoute("Posts in Year", "Post/{year}", new {controller = "Blog", action = "PostsInYear"}, new {year = @"\d{4,4}"});
    routes.MapRoute("Post List Pages", "Page/{page}", new {controller = "Blog", action = "Index"}, new {page = @"\d{1,6}"});
    routes.MapRoute("Posts by Tag", "Tag/{tag}", new {controller = "Blog", action = "PostsByTag"}, new {id = @"(\w+-?)*"});
    routes.MapRoute("Posts by Category", "Category/{category}", new {controller = "Blog", action = "PostsByCategory"}, new {id = @"(\w+-?)*"});

    routes.MapRoute("Default", "{controller}/{action}/{id}", new {controller = "Blog", action = "Index", id = UrlParameter.Optional});            
}

这就是以下定义MetaWeblogRouteHandler:

public class MetaWeblogRouteHandler : IRouteHandler
{
    public IHttpHandler GetHttpHandler(RequestContext requestContext)
    {
        return new MetaWeblog();
    }
}

基本上我想通过仅在/ XmlRpc处通过XmlRpc处理程序获得通常的ASP.NET MVC路由行为(/ controller/action)+我定义的永久链接+ XML-RPC处理的自定义路由.

由于参数与Default我试图删除路线的路线中定义的相同,但没有成功.
有任何想法吗？

更新:
当调用/Home/Index将AppRelativeCurrentExecutionFilePath被设置为"~/XmlRpc"使XMLRPC路由合法选择.有什么东西似乎搞乱了请求？

Update2:除了一种情况之外,问题就解决了:当通过Visual Studio for Debug启动IE时,它仍然失败.在其他所有情况下,它现在都可以工作(是的,我检查了浏览器缓存,甚至在不同的机器上尝试过以确定; IE从VS =失败开始,所有其他组合都很好).无论如何,因为它现在将为最终用户工作,我现在很满意;)

Answer 1

执行时Url.Action("Foo","Bar"),MVC将根据您的输入创建一个路由值集合(在这种情况下,action = Foo,controller = Bar),然后它将查看您的路由,尝试根据其段和默认值匹配匹配的路由.

您的XmlRpc路由没有段,也没有默认值,并且是第一个定义的路径.这意味着它将永远是第一个匹配产生使用URL时@Url.Action,@Html.ActionLink等

生成URL时防止该路由匹配的快速方法是添加默认控制器参数(使用您确定永远不会使用的控制器名称).例如:

routes.Add("XmlRpc", new Route("XmlRpc", new RouteValueDictionary() { { "controller", "XmlRpc" } }, new MetaWeblogRouteHandler())); 

现在执行时Url.Action("Foo","Bar"),您将获得预期的/Bar/Foourl,因为"Bar"与路径定义中的默认控制器值"XmlRpc"不匹配.

然而,这似乎有点hacky.

更好的选择是创建自己的RouteBase类.这将非常关心url /XmlRpc,然后MetaWeblogRouteHandler使用Html和Url助手生成链接时将使用它并将被忽略:

public class XmlRpcRoute : RouteBase
{
    public override RouteData GetRouteData(HttpContextBase httpContext)
    {
        //The route will only be a match when requesting the url ~/XmlRpc, and in that case the MetaWeblogRouteHandler will handle the request
        if (httpContext.Request.AppRelativeCurrentExecutionFilePath.Equals("~/XmlRpc", StringComparison.CurrentCultureIgnoreCase))
            return new RouteData(this, new MetaWeblogRouteHandler());

        //If url is other than /XmlRpc, return null so MVC keeps looking at the other routes
        return null;
    }

    public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
    {            
        //return null, so this route is skipped by MVC when generating outgoing Urls (as in @Url.Action and @Html.ActionLink)
        return null;
    }
}

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    //Add the route using our custom XmlRpcRoute class
    routes.Add("XmlRpc", new XmlRpcRoute());

    ... your other routes ...
}

但是,最后您要创建一条路径,只是IHttpHandler为了在单个URL 上运行MVC流程外部.您甚至努力保持该路由不会干扰其他MVC组件,例如使用帮助程序生成URL时.

然后,您可以直接在web.config文件中添加该模块的处理程序,同时/XmlRpc在MVC路由中添加忽略规则:

<configuration>
  ...
  <system.webServer>
    <handlers>
      <!-- Make sure to update the namespace "WebApplication1.Blog" to whatever your namespace is-->
      <add name="MetaWebLogHandler" verb="POST,GET" type="WebApplication1.Blog.MetaWeblogHandler" path="/XmlRpc" />
    </handlers>
  </system.webServer>
</configuration>

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    //Make sure MVC ignores /XmlRpc, which will be directly handled by MetaWeblogHandler
    routes.IgnoreRoute("XmlRpc");

    ... your other routes ...         
}

使用这3种方法中的任何一种,这就是我得到的:

• /Home/Index 呈现的索引视图 HomeController

• / 呈现的索引视图 BlogController

• @Url.Action("Foo","Bar") 生成网址 /Bar/Foo

• @Html.ActionLink("MyLink","Foo","Bar") 呈现以下html: <a href="/Bar/Foo">MyLink</a>

• /XmlRcp 呈现描述MetaWeblogHandler及其可用方法的视图,其中有一个可用的方法(blog.index,不带参数并返回字符串)

为了测试这个,我创建了一个新的空MVC 5应用程序,添加了NuGet包xmlrpcnet-server.

我创建了一个HomeController和a BlogController,都有一个索引动作,我创建了以下MetaWeblog类:

public interface IMetaWeblog
{
    [XmlRpcMethod("blog.index")]
    string Index();        
}

public class MetaWeblogHandler : XmlRpcService, IMetaWeblog
{
    string IMetaWeblog.Index()
    {
        return "Hello World";
    }        
}

public class MetaWeblogRouteHandler : IRouteHandler
{
    public IHttpHandler GetHttpHandler(RequestContext requestContext)
    {
        return new MetaWeblogHandler();
    }
}