Geoffrey Young wrote: > > Ken Miller wrote: > > > > There was a module floating around a while back that did request > > limiting (a DOS preventional tool). I've searched the archives > > (unsuccessfully), and I was wondering if anyone knows what the heck > > I'm talking about. > > maybe you had Stonehenge::Throttle in mind? >
I wrote something a while back in response to users holding down the F5 key in IE and DOS'ing our website. It's called Apache::GateKeeper and is more polite than Throttle in that it serves cached content to the client instead of sending a 'come back later' message. It's configurable so after exceeding a threshold the client gets content from the shared memory cache, and if a second threshold is exceeded (ok this guy is getting REALLY irritating) then they get the 'come back later' message. They will only get cached content if they exceed x number of requests within y number of seconds. It works with Apache::Filter and there are two components - Apache::GateKeeper which is the first handler in the line of filters, and Apache::GateKeeper::Gate, which is the last in the line of filters and does the caching of content which will be served to the client if they are naughty. I would have liked to write this so that it just drops into an existing mod_perl app, but I couldn't find a way to grab an application's output before it got sent to the client for storage in the cache, so I set it up with Apache::Filter. Any suggestions on how to solve this? I've put the source on http://www.swiftcamel.com/gatekeeper.tgz It isn't packaged at all, and only includes the two modules I've grabbed straight out of our app - Apache::GateKeeper and Apache::GateKeeper::Gate. Currently this uses pnotes to pass POST data and messages between modules that are in the Apache::Filter chain, so it's really not the kind of thing you can drop into an app. Any ideas on how to write a version of this that one CAN simply drop into an existing application would be most welcome. ~mark.
