... or the hidden secrets of lighty. X-Sendfile is one of the important, but mostly unknown features. Time to put the spot-light on it and see why you want to use it. X-Sendfile is a special header option you can set in any FastCGI backend to tell lighty to ignore the content of the response and replace it by the file that is specified in the X-Sendfile header. Doesn't sound dramatic in the first