Intercepting page loads from SWF

[MarcinZukowski]

Hi all,

I have an old project with a lot of SWF files. Many of these files, depending on the user's action, would load a hard-coded URL, often containing another SWF file. For example, a game menu would be one SWF, and on a click, it would load another SWF from a hard-coded URL.

I have all the SWF files involved in it, but I am not able to modify them. I want to host them all locally, and run them via JS, using the truly awesome Ruffle Wasm functionality!

What I would like to achieve is when an SWF tries to load a particular URL, I would get a callback into my JS, and load a specific SWF based on that url from a local filesystem.

I searched for something that could achieve that inside the Ruffle JS documentation, alas, I couldn't find anything. OpenURLMode "confirm" is kind of close to it, but I didn't find a way to abuse it for what I need... I also wondered if I could abuse traceObserver, but couldn't make that work...

Any ideas? Perhaps I'm missing something... Thanks in advance!

P.S. Got some success with a combination of OpenURLMode "confirm" and ... overwriting window.confirm to intercept what "confirm" displays, but that's really really ugly.

[MrCheeze]

There has been talk, but this was never implemented: #1486

[n0samu]

Currently I believe the best way to accomplish your goal would be to use JPEXS Decompiler to edit the URL strings in your SWF files: https://github.com/jindrapetrik/jpexs-decompiler
You can use Tools => Text Search => Search in AS to find the URLs you want to modify. Then select the relevant AS code to bring up the corresponding P-code. Edit the URL string within the P-code and save the SWF file. (I recommend doing this instead of editing the ActionScript code directly because the latter forces recompilation, which can cause problems).

[MarcinZukowski]

@MrCheeze Thanks! This pointed me in a good direction. Another thing similar to #1486 would be adding a more generic callback mechanism, for either a preset or a user-defined set functions.

@n0samu Thanks for the hint, didn't know that tool, could be quite useful. The issue is that often I still need to do something different than just changing the URL. But it might come handy for other things.

For now, the super ugly hack of OpenURLMode "confirm" plus overwriting window.confirm seems to work for me, I'll close this ticket for now. Thanks for all the answers!