solr query sanitizer?

[Dmitri Maziuk]

Hi all,

our website has a search box that essentially passes its contents to 
Solr without any massaging. This works fine 99% of the time, the other 
1% is when a misbehaving bot hits it and tries stuffing all sorts of 
crap in there.

Then bad things happen: Java's overly verbose exception stack traces 
fill up the disk faster than the logs are rotated, CPU load spikes, etc.

So, question: does anyone know of a validator/sanitizer we can use clean 
up the terms before passing them on to Solr? -- My google-fu fails to 
find one.

TIA
Dima