如何使用IHttpHandler啓用OutputCache

Question

我有一個IHttpHandler我想掛鉤到OutputCache支持，因此我可以將緩存的數據卸載到IIS內核。我知道MVC必須以某種方式做到這一點，我發現這OutputCacheAttribute：

public override void OnResultExecuting(ResultExecutingContext filterContext) { 
     if (filterContext == null) { 
      throw new ArgumentNullException("filterContext"); 
     } 

     // we need to call ProcessRequest() since there's no other way to set the Page.Response intrinsic 
     OutputCachedPage page = new OutputCachedPage(_cacheSettings); 
     page.ProcessRequest(HttpContext.Current); 
    } 

    private sealed class OutputCachedPage : Page { 
     private OutputCacheParameters _cacheSettings; 

     public OutputCachedPage(OutputCacheParameters cacheSettings) { 
      // Tracing requires Page IDs to be unique. 
      ID = Guid.NewGuid().ToString(); 
      _cacheSettings = cacheSettings; 
     } 

     protected override void FrameworkInitialize() { 
      // when you put the <%@ OutputCache %> directive on a page, the generated code calls InitOutputCache() from here 
      base.FrameworkInitialize(); 
      InitOutputCache(_cacheSettings); 
     } 
    } 

但不知道如何將其應用到IHttpHandler。試過這樣的事情，當然，這並不工作：

public class CacheTest : IHttpHandler 
{ 
    public void ProcessRequest(HttpContext context) 
    { 
     OutputCacheParameters p = new OutputCacheParameters { Duration = 3600, Enabled = true, VaryByParam = "none", Location = OutputCacheLocation.Server }; 
     OutputCachedPage page = new OutputCachedPage(p); 
     page.ProcessRequest(context); 

     context.Response.ContentType = "text/plain"; 
     context.Response.Write(DateTime.Now.ToString()); 
     context.Response.End(); 

    } 

    public bool IsReusable 
    { 
     get 
     { 
      return true; 
     } 
    } 
} 

Answer 1

它必須這樣做：

public class CacheTest : IHttpHandler 
{ 
    public void ProcessRequest(HttpContext context) 
    { 
     TimeSpan expire = new TimeSpan(0, 0, 5, 0); 
     DateTime now = DateTime.Now; 
     context.Response.Cache.SetExpires(now.Add(expire)); 
     context.Response.Cache.SetMaxAge(expire); 
     context.Response.Cache.SetCacheability(HttpCacheability.Server); 
     context.Response.Cache.SetValidUntilExpires(true); 

     context.Response.ContentType = "text/plain"; 
     context.Response.Write(DateTime.Now.ToString()); 
    } 

    public bool IsReusable 
    { 
     get 
     { 
      return true; 
     } 
    } 
}