ASP.NET Web API消息處理程序

Question

我想實現自定義消息處理程序，該程序將檢查每個請求中必須存在的自定義標頭。

如果我的自定義標題存在，請求將通過，如果標題不存在，則會觸發控制器，請求被自定義錯誤消息拒絕。

沒有我的問題是：如果我以這種方式實現我的處理程序，這意味着所有請求都必須具有標頭但是我需要有一個gate我可以在沒有該標頭的情況下調用，並且該請求必須被消息處理程序忽略，控制器，即使沒有自定義標題。

有沒有可能做到這一點？或者我怎麼能實現我的消息處理程序，將忽略某些特定的控制器調用或類似的東西......？

Answer 1

你可以試試這個。（未經測試）

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web.Http; 


public abstract class EnforceMyBusinessRulesController : ApiController 
{ 

    protected override void Initialize(System.Web.Http.Controllers.HttpControllerContext controllerContext) 
    { 

     /* 

      Use any of these to enforce your rules; 

      http://msdn.microsoft.com/en-us/library/system.web.http.apicontroller%28v=vs.108%29.aspx 

      Public property Configuration Gets or sets the HttpConfiguration of the current ApiController. 
      Public property ControllerContext Gets the HttpControllerContext of the current ApiController. 
      Public property ModelState Gets the model state after the model binding process. 
      Public property Request Gets or sets the HttpRequestMessage of the current ApiController. 
      Public property Url Returns an instance of a UrlHelper, which is used to generate URLs to other APIs. 
      Public property User Returns the current principal associated with this request. 
     */ 

     base.Initialize(controllerContext); 

     bool iDontLikeYou = true; /* Your rules here */ 
     if (iDontLikeYou) 
     { 
      throw new HttpResponseException(new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.NotFound)); 
     } 


    } 

} 



public class ProductsController : EnforceMyBusinessRulesController 
{ 

    protected override void Initialize(System.Web.Http.Controllers.HttpControllerContext controllerContext) 
    { 
     base.Initialize(controllerContext); 
    } 


}