Append Hashes To Blazor Published Files

[elepner]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

When one deploys Blazor application to CDN the application sometimes fails to load because integrity check fails. That happens because there's significant delay between deployment and CDN content update. There's little room to control how the updated files propagate.

Describe the solution you'd like

The ultimate (and maybe only) solution to this problem would be to attach hash to every file name like bundlers in JS Frameworks do. It can be hash of the file or hash connected to the build itself. Here's example of Angular production build:

I know it's possible to implement DIY solution for that, but it's something that would be nice to have in Blazor by default for everyone.

Additional context

No response

[SteveSandersonMS]

Thanks for the suggestion, @elepner.

It could be more complicated than just changing the filenames, though. If the images (etc) had their filenames changed, what would happen to code like <img src="someimage.png"/> or @include url('somefile.css') in CSS?

Would you need to change all your existing code to work with this?

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[elepner]

As far as I know, modern JS bundlers are capable of tracking all dependencies, including images and replace URLs with the correct hashed ones. However, executables download is the most critical issue since the app just fails to load and there's little room for manoeuvre.

[SteveSandersonMS]

The issue is that there isn't a JS bundler involved here. These references appear inside .razor files, for example, which are processed by the Razor compiler not by a JS bundler.

[elepner]

I fully understand that, I'm just pointing out how the other frameworks address other types of assets. It'd require from Blazor builder to keep the graph of static asset dependencies, but I suppose this feature is beyond the scope this feature request.