WebAPI 和 ODataController 返回 406 Not Acceptable [英] WebAPI and ODataController return 406 Not Acceptable

问题描述

在将 OData 添加到我的项目之前，我的路由设置如下:

Before adding OData to my project, my routes where set up like this:

       config.Routes.MapHttpRoute(
            name: "ApiById",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional },
            constraints: new { id = @"^[0-9]+$" },
            handler: sessionHandler
        );

        config.Routes.MapHttpRoute(
            name: "ApiByAction",
            routeTemplate: "api/{controller}/{action}",
            defaults: new { action = "Get" },
            constraints: null,
            handler: sessionHandler
        );

        config.Routes.MapHttpRoute(
            name: "ApiByIdAction",
            routeTemplate: "api/{controller}/{id}/{action}",
            defaults: new { id = RouteParameter.Optional },
            constraints: new { id = @"^[0-9]+$" },
            handler: sessionHandler

所有控制器都提供 Get、Put(动作名称为 Create)、Patch(动作名称为 Update)和 Delete.例如，客户端将这些不同的标准 url 用于 CustomerType 请求:

All controllers provide Get, Put (action name is Create), Patch (action name is Update) and Delete. As an example, the client uses these various standard url's for the CustomerType requests:

string getUrl =  "api/CustomerType/{0}";
string findUrl = "api/CustomerType/Find?param={0}";
string createUrl = "api/CustomerType/Create";
string updateUrl = "api/CustomerType/Update";
string deleteUrl = "api/CustomerType/{0}/Delete";

然后我添加了一个与我的其他 Api 控制器具有相同操作名称的 OData 控制器.我还添加了一条新路线:

Then I added an OData controller with the same action names as my other Api controllers. I also added a new route:

        ODataConfig odataConfig = new ODataConfig();

        config.MapODataServiceRoute(
            routeName: "ODataRoute",
            routePrefix: null,
            model: odataConfig.GetEdmModel()
        );

到目前为止，我在客户端没有做任何更改.当我发送请求时，我收到 406 Not Available 错误.

So far I changed nothing on the client side. When I send a request, I get a 406 Not Available error.

路线是否混淆了?我该如何解决这个问题?

Are the routes getting mixed up? How can I solve this?

推荐答案

配置路由的顺序会产生影响.就我而言，我还有一些标准的 MVC 控制器和帮助页面.所以在 Global.asax 中:

The order in which the routes are configured has an impact. In my case, I also have some standard MVC controllers and help pages. So in Global.asax:

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    GlobalConfiguration.Configure(config =>
    {
        ODataConfig.Register(config); //this has to be before WebApi
        WebApiConfig.Register(config); 

    });
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
}

过滤器和路由表部分在我开始我的项目时不存在并且需要.

The filter and routeTable parts weren't there when I started my project and are needed.

ODataConfig.cs:

public static void Register(HttpConfiguration config)
{
    config.MapHttpAttributeRoutes(); //This has to be called before the following OData mapping, so also before WebApi mapping

    ODataConventionModelBuilder builder = new ODataConventionModelBuilder();

    builder.EntitySet<Site>("Sites");
    //Moar!

    config.MapODataServiceRoute("ODataRoute", "api", builder.GetEdmModel());
}

WebApiConfig.cs:

public static void Register(HttpConfiguration config)
{
    config.Routes.MapHttpRoute( //MapHTTPRoute for controllers inheriting ApiController
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
    );
}

作为奖励，这是我的 RouteConfig.cs:

And as a bonus, here's my RouteConfig.cs:

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

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

这必须按照确切顺序.我尝试移动调用，结果 MVC、Api 或 Odata 因 404 或 406 错误而损坏.

This has to be in that EXACT ORDER. I tried moving the calls around and ended up with either MVC, Api or Odata broken with 404 or 406 errors.

所以我可以打电话:

localhost:xxx/-> 引导到帮助页面(主控制器、索引页面)

localhost:xxx/ -> leads to help pages (home controller, index page)

localhost:xxx/api/-> 指向 OData $metadata

localhost:xxx/api/ -> leads to the OData $metadata

localhost:xxx/api/Sites -> 导致我的 SitesController 的 Get 方法继承自 ODataController

localhost:xxx/api/Sites -> leads to the Get method of my SitesController inheriting from ODataController

localhost:xxx/api/Test -> 导致我的 TestController 的 Get 方法继承自 ApiController.

localhost:xxx/api/Test -> leads to the Get method of my TestController inheriting from ApiController.

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