error404 not working with media items or pdf extension - Using Umbraco and getting started

Press Ctrl / CMD + C to copy this to your clipboard.

Copied to clipboard

Flag this post as spam?

This post will be reported to the moderators as potential spam to be looked at

David Armitage 508 posts 2078 karma points

Sep 07, 2022 @ 06:13

0

error404 not working with media items or pdf extension

Hi All,

I noticed that the custom errors dont work from media items. Are maybe this is regated to certain extensions.

For example. I have custom errors set for error404 in the UmbracoSettings.config. If I enter a wrong URL then this redirects to my 404 page ok.

But them when I enter a bugus URL with a .pdf on the end then the redirect doesn't work and I am still presented with the generic IIS 404 - File or directory not found error screen which I am trying to avoid for a vulnerability scan.

Any idea how to get the error404 config working for everything including PDFs?

Copy Link

Huw Reddick 1929 posts 6697 karma points MVP 2x c-trib

Sep 08, 2022 @ 10:39

I added the check below in my startup.cs in the section where I add some response headers, that should catch any 404 (/error404 is my umbraco page)

        app.Use(async (context, next) =>
        {
            context.Response.Headers.Add("X-Xss-Protection", "1; mode=block");
            context.Response.Headers.Add("Strict-Transport-Security", "max-age=31536000");
            context.Response.Headers.Add("X-Content-Type-Options", "nosniff");
            context.Response.Headers.Add("X-Frame-Options", "SAMEORIGIN");
            await next();
            if (context.Response.StatusCode == 404)
            {
                context.Request.Path = "/error404";
                await next();
            }
        });

Copy Link

David Armitage 508 posts 2078 karma points

Sep 08, 2022 @ 10:45
0
Hi Huw,

Sorry I forgot to mention this was for Umbraco 8. Anyway I figure this out.

I could not for the liufe of me figure out a solution using the standard Umbraco config. It just didn't handle certain extensions like .pdf and a few others.

Instead I create some IIS rules to handle the errors. This seemed to work.
```
<httpErrors errorMode="Custom" existingResponse="Replace">
    <remove statusCode="404" />
    <error statusCode="404" responseMode="ExecuteURL" path="/page-not-found/" />
</httpErrors>
```
Copy Link
Huw Reddick 1929 posts 6697 karma points MVP 2x c-trib

Sep 08, 2022 @ 10:48

0

yes that's what you need to do, basically because they are considered to be static files so the error comes from IIS not Umbraco

Copy Link
is working on a reply...

Please Sign in or register to post replies