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I'm writing a new IHttpModule. I would like to invalidate certain requests with 404 using a BeginRequest event handler. How do I terminate the request and return a 404?

Kees C. Bakker
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  • This has your answer: http://stackoverflow.com/questions/499817/what-is-the-proper-way-to-send-an-http-404-response-from-an-asp-net-mvc-action -- throw an HttpException – MatthewMartin Oct 29 '12 at 13:04

4 Answers4

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You can explicitly set the status code to 404 like:

HttpContext.Current.Response.StatusCode = 404; 
HttpContext.Current.Response.End();

Response will stop executing.

Kees C. Bakker
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Rohit Vyas
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1

You can try with 

throw new HttpException(404, "File Not Found");
Aghilas Yakoub
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Another possibility is:

HttpContext.Current.Response.StatusCode = 404; 
HttpContext.Current.Response.Flush(); // Sends all currently buffered output to the client.
HttpContext.Current.Response.SuppressContent = true;  // Gets or sets a value indicating whether to send HTTP content to the client.
HttpContext.Current.ApplicationInstance.CompleteRequest(); // Causes ASP.NET to bypass all events and filtering in the HTTP pipeline chain of execution and directly execute the EndRequest event.
Kees C. Bakker
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0

You can do the following:

HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Location", l_notFoundPageUrl);
HttpContext.Current.Response.Status = "404 Not Found";
HttpContext.Current.Response.End();

Assign l_notFoundPageUrl to your 404 page.

Pal R
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