Access session data from custom RouteHandler?

Question

I am building onto the example found here:

http://www.mikesdotnetting.com/Article/126/ASP.NET-MVC-Prevent-Image-Leeching-with-a-Custom-RouteHandler

What I would like to do now is have some logic that checks for certain data in session before allowing the valid image to show. Is it possible to access session data from within the custom RouteHandler or any other type of persisted data?

score 2 · Answer 1 · edited May 23 '17 at 10:32

I have published solution for this problem as answer to another question.

Look at the application life cycle overview (https://msdn.microsoft.com/en-us/library/bb470252(v=vs.140).aspx), particulary the row The request is processed by the HttpApplication pipeline. in the table Life Cycle Stages.

Whereas the function GetHttpHandler of your IRouteHandler object is invoked in the phase 10 (Raise the MapRequestHandler event.) of the pipeline, Session is restored in the phase 12 (Raise the AcquireRequestState event.). That is why you cannot access Session variables during the GetHttpHandler function and RequestContext.HttpContext.Session is always null.

score 1 · Accepted Answer · answered Jun 26 '10 at 03:37

1

You have access the session right from the requestContext:

private static void ProcessRequest(RequestContext requestContext)
{
   var session = requestContext.HttpContext.Session;

answered Jun 26 '10 at 03:37

John Farrell

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I was getting null. Hmm. I'll try again. Thanks. – Brian David Berman Jun 26 '10 at 03:46
Did this approach work? I always get null when trying to access of from a custom route handler – Macros Jan 10 '12 at 20:09
i have a custom route handler in webforms and accessing session in custom route handler always returns null. i think `ProcessRequest`method belongs to `IHttpHandler` – Muhammad Adeel Zahid Mar 14 '12 at 07:27

Access session data from custom RouteHandler?

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