class Excon::Middleware::Decompress

def request_call(datum)
  unless datum.has_key?(:response_block)
    key = datum[:headers].keys.detect {|k| k.to_s.casecmp('Accept-Encoding') == 0 } || 'Accept-Encoding'
    if datum[:headers][key].to_s.empty?
      datum[:headers][key] = 'deflate, gzip'
    end
  end
  @stack.request_call(datum)
end