Werkzeug（和Flask）将标头存储在的实例中
werkzeug.datastructures.Headers。您应该能够执行以下操作：
provided_ips = request.headers.getlist("X-Forwarded-For")# The first entry in the list should be the client's IP.或者，您可以使用
request.access_route（感谢@Bastian指出这一点！）：
provided_ips = request.access_route# First entry in the list is the client's IP
