#http连接有问题时候，自动重连
def conn_try_again(function):
 RETRIES = 0
 #重试的次数
 count = {"num": RETRIES}
 def wrapped(*args, **kwargs):
  try:
   return function(*args, **kwargs)
  except Exception, err:
   if count['num'] < 2:
    count['num'] += 1
    return wrapped(*args, **kwargs)
   else:
    raise Exception(err)
 return wrapped

@conn_try_again
def http_request(session, method, url, data, header = header):
  try:
    if method == 'GET':
      r = session.get(url, data = data, headers = header)
      return r
    elif method == 'POST':
      r = session.post(url, data = data, headers = header)
      return r
    else:
      return None
  except Exception as e:
    logging.exception('[online_statistics] http request connection error %s'% e)