route hijacking with common 404 handling - Using Umbraco and getting started

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Dmitriy 168 posts 588 karma points

Apr 03, 2019 @ 15:42
0

Route Hijacking with builtin 404 handling
Hello, Umbracians

Here is my code:
```
public class RedirectionPageController : RenderMvcController
{
    public ActionResult Index(RenderModel model)
    {
        var child = model.Content.FirstChild(); 
        var viewName = child.GetTemplateAlias();

        if(viewName.IsNullOrWhiteSpace())
        {
            return new HttpStatusCodeResult(HttpStatusCode.NotFound);
        }

        return View(viewName, child); 
    }

}
```
I want to render view of first child of that page, but if it have no template - render the 404 page. But builtin Umbraco 404-handling behavior does't executed in case. All the others pages (without hijacking) without views (templates) working well with builtin 404-handling.

How to make Umbraco force it own 404 handling?
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Dennis Flæng Jørgensen 35 posts 145 karma points c-trib

Apr 03, 2019 @ 17:24

1

I think you need to use the IContentFinder instead if you want the default 404-handling to be in effect.

https://our.umbraco.com/documentation/reference/routing/request-pipeline/icontentfinder

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Dennis Flæng Jørgensen 35 posts 145 karma points c-trib

Apr 03, 2019 @ 17:46

I made a quick example for you tested with Umbraco 8:

public class MyApplication : IUserComposer
{
    public void Compose(Composition composition)
    {
        composition.ContentFinders().Replace<ContentFinderByUrl, RedirectionContentFinder>();
    }
}

public class RedirectionContentFinder : ContentFinderByUrl
{
    public RedirectionContentFinder(ILogger logger) : base(logger)
    {
    }

    public override bool TryFindContent(PublishedRequest request)
    {
        bool result = base.TryFindContent(request);
        if (request.PublishedContent != null && request.PublishedContent.ContentType.Alias.Equals("redirectionPage", StringComparison.InvariantCultureIgnoreCase))
        {
            var firstChild = request.PublishedContent.Children.FirstOrDefault();
            var firstChildTemplateAlias = firstChild?.GetTemplateAlias();
            if (firstChildTemplateAlias.IsNullOrWhiteSpace())
            {
                request.PublishedContent = null;
                request.Is404 = true;
                return false;
            }
            request.PublishedContent = firstChild;
            return true;
        }
        return result;
    }
}

For Umbraco 7 you should replace IUserComposer with IApplicationEventHandler and put the code in ApplicationStarting

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Dmitriy 168 posts 588 karma points

Apr 04, 2019 @ 12:20

0

Hi, Dennis

A good solution, but not what I need.

I don't want to make my own ContentFinder, I need to use the builtin implementation of it.

Are there any other approaches for?

I think I have to get ContentFinder collection and find LastChanceContentFinder or something like that.

Thanks

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Route Hijacking with builtin 404 handling