Maybe with Lua, otherwise you need to hack the code to not handle a 400, a grep for 400 and a grep for some other code which works as desired may give you an idea what to do.
nginx does not waste time with broken clients hence the 400 handling, it may cost you performance when you actually handle it as a lot of basic attacks result in 400's (ea. a DROP).
nginx does not waste time with broken clients hence the 400 handling, it may cost you performance when you actually handle it as a lot of basic attacks result in 400's (ea. a DROP).