varnish mobile filter

gistfile1.c

# Rutine to try and identify device
sub identify_device { 
  # Default to thinking it's a PC
  set req.http.X-Device = "pc"; 

  if (req.http.User-Agent ~ "iP(hone|od)" || req.http.User-Agent ~ "Android" ) { 
    # It says its a iPhone, iPod or Android - so let's give them the touch-site..
    set req.http.X-Device = "mobile"; 
  }
}