在LINQPad中使用WebAPI？

Question

當我試圖在LINQPad中使用Selfhosted WebAPI時，我只是不斷收到類似控制器不存在的錯誤。

是否必須爲WebAPI（控制器/類）創建單獨的程序集，然後在查詢中引用它們？

下面是我使用

#region namespaces 
using AttributeRouting; 
using AttributeRouting.Web.Http; 
using AttributeRouting.Web.Http.SelfHost; 
using System.Web.Http.SelfHost; 
using System.Web.Http.Routing; 
using System.Web.Http; 
#endregion 

public void Main() 
{ 

    var config = new HttpSelfHostConfiguration("http://192.168.0.196:8181/"); 
    config.Routes.MapHttpAttributeRoutes(cfg => 
    { 
     cfg.AddRoutesFromAssembly(Assembly.GetExecutingAssembly()); 
    }); 
    config.Routes.Cast<HttpRoute>().Dump(); 

    AllObjects.Add(new UserQuery.PlayerObject { Type = 1, BaseAddress = "Hej" }); 

    config.IncludeErrorDetailPolicy = IncludeErrorDetailPolicy.Always; 
    using(HttpSelfHostServer server = new HttpSelfHostServer(config)) 
    { 
     server.OpenAsync().Wait(); 
     Console.WriteLine("Server open, press enter to quit"); 
     Console.ReadLine(); 
     server.CloseAsync(); 
    } 

} 

public static List<PlayerObject> AllObjects = new List<PlayerObject>(); 

public class PlayerObject 
{ 
    public uint Type { get; set; } 
    public string BaseAddress { get; set; } 
} 

[RoutePrefix("players")] 
public class PlayerObjectController : System.Web.Http.ApiController 
{ 
    [GET("allPlayers")] 
    public IEnumerable<PlayerObject> GetAllPlayerObjects() 
    { 
     var players = (from p in AllObjects 
        where p.Type == 1 
        select p); 
     return players.ToList(); 
    } 
} 

此代碼工作在一個單獨的控制檯項目在VS2012晴好時的代碼。

我開始使用通過NuGET的AttributeRouting，當我沒有得到「正常的」WebAPI路由工作。

我在瀏覽器中得到的錯誤是：No HTTP resource was found that matches the request URI 'http://192.168.0.196:8181/players/allPlayers'.

更多的錯誤：在默認情況下No type was found that matches the controller named 'PlayerObject'

Answer 1

的Web API將忽略控制器，不公開，以及LinqPad類嵌套公共，我們也有類似的問題scriptcs

您必須添加一個自定義控制器解析器，該解析器將繞過該限制，並允許您從手動執行的程序集中發現控制器類型。

這實際上已經被修復了（現在的Web API控制器只需要可見不公開），但發生在9月份，自主主機的最新穩定版本是從8月份開始。

因此，補充一點：

public class ControllerResolver: DefaultHttpControllerTypeResolver { 

    public override ICollection<Type> GetControllerTypes(IAssembliesResolver assembliesResolver) { 
     var types = Assembly.GetExecutingAssembly().GetExportedTypes(); 
     return types.Where(x => typeof(System.Web.Http.Controllers.IHttpController).IsAssignableFrom(x)).ToList(); 
    } 

} 

，然後註冊對你的配置，就大功告成了：

var conf = new HttpSelfHostConfiguration(new Uri(address)); 
conf.Services.Replace(typeof(IHttpControllerTypeResolver), new ControllerResolver()); 

這是一個完整的工作示例，我只是測試對LinqPad。請注意，您必須以管理員身份運行LinqPad，否則您將無法在端口上收聽。

public class TestController: System.Web.Http.ApiController { 
    public string Get() { 
     return "Hello world!"; 
    } 
} 

public class ControllerResolver: DefaultHttpControllerTypeResolver { 
    public override ICollection<Type> GetControllerTypes(IAssembliesResolver assembliesResolver) { 
     var types = Assembly.GetExecutingAssembly().GetExportedTypes(); 
     return types.Where(x => typeof(System.Web.Http.Controllers.IHttpController).IsAssignableFrom(x)).ToList(); 
    } 
} 

async Task Main() { 
    var address = "http://localhost:8080"; 
    var conf = new HttpSelfHostConfiguration(new Uri(address)); 
    conf.Services.Replace(typeof(IHttpControllerTypeResolver), new ControllerResolver()); 

    conf.Routes.MapHttpRoute(
     name: "DefaultApi", 
     routeTemplate: "api/{controller}/{id}", 
     defaults: new { id = RouteParameter.Optional } 
    ); 

    var server = new HttpSelfHostServer(conf); 
    await server.OpenAsync(); 

    // keep the query in the 'Running' state 
    Util.KeepRunning(); 
    Util.Cleanup += async delegate { 
     // shut down the server when the query's execution is canceled 
     // (for example, the Cancel button is clicked) 
     await server.CloseAsync(); 
    }; 
}