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#!/usr/bin/ruby

require 'fcgi'
require 'less'
require 'digest/sha1'

FCGI.each do |request|
  out = request.out
  source = File.new(request.env["SCRIPT_FILENAME"], 'r').read;
  hash = Digest::SHA1.hexdigest(source).inspect

#  if request.env["HTTP_IF_NONE_MATCH"] == hash
#    out.print request.env["SERVER_PROTOCOL"]+" 304 Not Modified\r\n"
#    out.print "\r\n"
#  else
    Dir.chdir File.dirname request.env["SCRIPT_FILENAME"]

    begin
      code = Less::Parser.new.parse(source).to_css :compress => true
    rescue Exception => err
      out.print request.env["SERVER_PROTOCOL"]+"500 Internal Server Error\r\nContent-Type: text/css\r\n\r\n/* * *\r\n"
      out.print err.message
      out.print "\r\n* * */"
    else
      out.print "Content-Type: text/css\r\n"
      out.print "Etag: "+hash+"\r\n"
      out.print "\r\n"
      out.print code
    end
  request.finish
end