import os

from flask import request

def get_request_ip():
  """ Returns the IP address of the client making the current Flask request or None if none. """
  remote_addr = request.remote_addr or None
  if os.getenv('TEST', 'false').lower() == 'true':
    remote_addr = request.headers.get('X-Override-Remote-Addr-For-Testing', remote_addr)

  return remote_addr