如何在IHTTPMODULE中使用404结束请求

Question

我正在写一个新的ihttpmodule。我想使用BeginRequest事件处理程序将某些请求与404无效。如何终止请求并返回404？

Answer 1

您可以将状态代码明确设置为404，例如：

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

响应将停止执行。

Answer 2

您可以尝试

throw new HttpException(404, "File Not Found");

Answer 3

另一种可能性是：

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.

Answer 4

您可以执行以下操作：

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

将l_notfoundpageurl分配到您的404页。