class Excon::Middleware::Decompress

def response_call(datum)
  body = datum[:response][:body]
  unless datum.has_key?(:response_block) || body.nil? || body.empty?
    if (key = datum[:response][:headers].keys.detect {|k| k.casecmp('Content-Encoding') == 0 })
      encodings = Utils.split_header_value(datum[:response][:headers][key])
      if (encoding = encodings.last)
        if encoding.casecmp('deflate') == 0
          datum[:response][:body] = begin
            Zlib::Inflate.new(INFLATE_ZLIB_OR_GZIP).inflate(body)
          rescue Zlib::DataError # fallback to raw on error
            Zlib::Inflate.new(INFLATE_RAW).inflate(body)
          end
          encodings.pop
        elsif encoding.casecmp('gzip') == 0 || encoding.casecmp('x-gzip') == 0
          datum[:response][:body] = Zlib::GzipReader.new(StringIO.new(body)).read
          encodings.pop
        end
        datum[:response][:headers][key] = encodings.join(', ')
      end
    end
  end
  @stack.response_call(datum)
end