This came to mind over the weekend as I need to figure out a way to do a very specific type of content filtering for a very specific reason in a very specific setting.

Essentially, I need to filter out any content with certain words. Not just porn filtering but a specific type of content.

A man in the middle attack is the only way to do it, but since it is legitimate need and legitimate setting, I figure that everything will have to be proxied somehow but I'm not sure how to go about breaking HTTPS and then giving it back to the browser without making everything go haywire.

If anybody has suggestions on the project it might be able to be used to do this, I would be grateful.