class ElasticAPM::ContextBuilder

def get_body(req)
  case req.media_type
  when 'application/x-www-form-urlencoded', 'multipart/form-data'
    req.POST.dup
  else
    body = req.body.read
    req.body.rewind
    body.byteslice(0, MAX_BODY_LENGTH).force_encoding('utf-8')
  end
end