Find some way to make the embedded blueprints in our tutorials work for users in the UK

[azrogers]

It looks like blueprintUE.com, the service we use to embed Unreal blueprints in our tutorials, has had to block users from the UK due to new "online safety" legislation. This means that some of our Unreal tutorials are currently broken for users in the UK.

It seems like the most robust solution here would be to host the blueprint viewer ourselves. blueprintUE.com has a self-hosted version, but this wouldn't be a drop-in solution. The self-hosted version is a self-hosted version of the entire website, whereas we only want to self-host the viewer component. If we can extract that viewer component (which should just be a few JavaScript and HTML files), we'd also need a way to get the data for the blueprints we've already uploaded to blueprintUE and come up with some way of passing that data to the viewer component without needing the whole blueprintUE backend (assuming it's a JSON document, maybe just a bunch of JSON files we can upload?).

Another alternative is just screenshotting the blueprints, of course, but this is significantly less helpful than the interactive editor we have now.

[azrogers]

Spending a bit more time looking into this, it looks like we could port over every embedded blueprint by simply:

• Grabbing render.css and render.js from the GitHub page.
• Downloading the HTML file for each embedded blueprint (like this).
• Rewriting the URLs of render.css and render.js in that HTML to point to the files we grabbed from GitHub.

And that should be it. All of the blueprint data is in the HTML file itself. This means we would just need to scrape a few HTML files and we'd be able to replace all of the embedded blueprints with ones hosted on our own servers, which would have the added advantage of not needing blueprintUE.com to remain up.

I'm not sure on how the way we handle the web hosting of our tutorials interacts with this idea, but it shouldn't be too complex.

[azrogers]

In fact, in the time between these messages I was able to grab every single embedded blueprint across our tutorials and rewrite the URLs to work with a local copy of render.css and render.js:

bue-scrape.zip

We would just need to find somewhere for these files to live, and then rewrite the iframe bits in our tutorials to point there instead (which should just be a simple s/blueprintue.com\/render/new-url/)