错误信息
/home/hpcm/.virtualenvs/py3/lib/python3.5/site-packages/flask/sessions.py:217: UserWarning: The session cookie domain is an IP address. This may not work as intended in some browsers. Add an entry to your hosts file, for example "localhost.localdomain", and use that instead.
原因
在配置文件中配置了SERVER_NAME导致外部访问的url全部失效
解决
删除 config载入的SERVER_NAME全局字段
UserWarning: The session cookie domain is an IP address. This may not work as intended
原文：https://www.cnblogs.com/hpcm/p/11040627.html