# BEFORE

  def clean_headers
    ugly_headers = env.select { |k,v| k.match("^HTTP.*") }
    ugly_headers
  end

{
  "headers":{
    "HTTP_ACCEPT":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "HTTP_ACCEPT_ENCODING":"gzip, deflate",
    "HTTP_ACCEPT_LANGUAGE":"en-us",
    "HTTP_CONNECTION":"keep-alive",
    "HTTP_HOST":"localhost:9292",
    "HTTP_USER_AGENT":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_1) AppleWebKit/536.25 (KHTML, like Gecko) Version/6.0 Safari/536.25",
    "HTTP_VERSION":"HTTP/1.1"
  },
  "method":"GET",
  "params":{

  }
}


# AFTER

  def clean_headers
    ugly_headers = env.select { |k,v| k.match("^HTTP.*") }
    cut_keys = ugly_headers.each_key.map { |k| k.gsub('HTTP_', '').downcase }
    clean = {}
    ugly_headers.each_with_index { |k_v, index| clean[cut_keys[index]] = k_v[1] }
    clean
  end

{
  "headers":{
    "accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "accept_encoding":"gzip, deflate",
    "accept_language":"en-us",
    "cache_control":"max-age=0",
    "connection":"keep-alive",
    "host":"localhost:9292",
    "user_agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_1) AppleWebKit/536.25 (KHTML, like Gecko) Version/6.0 Safari/536.25",
    "version":"HTTP/1.1"
  },
  "method":"GET",
  "params":{

  }
}