E. Jaep
E. Jaep

Reputation: 2143

Getting default 404 error page for unknown file extension even with custom 404 error page

We have set a custom 404 error page in order to display a 'nice' page instead of the default IIS page.

When trying to access a non existing page with a known file extension (e.g. http://mydomain/dumb.aspx), the custom 404 page gets displayed.

When trying to access a file with an unknown file extension (e.g. http://mydomain/index.dumb), the default 404 error page gets displayed.

What puzzles me is that the IIS Web core is handling the error:

ModuleName: IIS Web Core
Notification: 16
HttpStatus: 404 HttpReason: Not Found
HttpSubStatus: 0
ErrorCode: 2147942402 ConfigExceptionInfo : Notification: MAP_REQUEST_HANDLER ErrorCode: The system cannot find the file specified. (0x80070002)

But the configured custom error page is note taken into account:

 <httpErrors errorMode="Detailed">
    <remove statusCode="404" subStatusCode="-1" />
    <error statusCode="404" prefixLanguageFilePath="" path="/httpError" responseMode="ExecuteURL" />
</httpErrors>

We do have handler mappings for * but not for . . Could it be the cause of the issue? What would be the correct configuration?

Upvotes: 3

Views: 3785

Answers (2)

E. Jaep
E. Jaep

Reputation: 2143

Just had to change the errorMode attribute of the httpErrors node from Detailed to Custom.

From:

<httpErrors errorMode="Detailed">

to:

<httpErrors errorMode="Custom">

Upvotes: 2

Khalid Abuhakmeh
Khalid Abuhakmeh

Reputation: 10839

I blogged about this. You probably are not setting your web.config correctly. Read my post to learn how to do it. You need this in your system.webserver node.

<httpErrors existingResponse="PassThrough" />

http://blog.aquabirdconsulting.com/2012/04/19/setting-up-asp-net-mvc-error-pages/

Upvotes: 1

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