清理服务器端会话文件-使用文件系统的Flask-Session [英] Clean server-side session files - Flask-Session using filesystem

问题描述

我选择通过Flask-Session在Flask中使用服务器端会话管理.

I chose to use a server-side session management with Flask using Flask-Session.

我使用filesystem存储数据，并且按预期方式，这些文件存储在配置目录中的/flask_session文件夹下.

I store the data using filesystem and as expected, these files are stored under a /flask_session folder in my config directory.

这是我在__init__.py

# __init__.py

from flask_session import Session

[...]

app.config['SESSION_TYPE'] = 'filesystem'
app.config['SECRET_KEY'] = config.SECRET_KEY
sess = Session()
sess.init_app(app)

按预期，会生成会话文件&存储在/flask_session

As expected, session files generated & stored under /flask_session

▾ flask_session/
        1695e5cbf9b4edbbbb82a8ef1fad89ae
        192761f7ce8e3cbf3ca11665133b7794
        2029240f6d1128be89ddc32729463129
        ...

问题是:这些文件是否在特定时间后(例如，作为会话存储在客户端)由flask_session自动删除?如果是，是否可以减少/增加此时间?

Question is: Are these files automatically removed by flask_session after a specific amount of time (ie. as the session stored client-side)? If yes, is it possible to decrease/increase this timing?

推荐答案

正如Danila Ganchar所说，使用PERMANENT_SESSION_LIFETIME可以控制会话的到期时间.

As Danila Ganchar commented, using PERMANENT_SESSION_LIFETIME allows to control the session expiration time.

Flask-Session使用与Flask本身相同的内置配置(与会话相关).来自 Flask-Session 文档:

Flask-Session use the same builtin config than Flask itself (related to session). From Flask-Session doc:

以下配置值是内置配置值 与会话相关的Flask本身.他们都是 例如，Flask-Session可以理解，您应该使用 PERMANENT_SESSION_LIFETIME来控制会话的生存期.

The following configuration values are builtin configuration values within Flask itself that are related to session. They are all understood by Flask-Session, for example, you should use PERMANENT_SESSION_LIFETIME to control your session lifetime.

示例:

# __init__.py

from flask_session import Session
from datetime import timedelta

app.config['SESSION_PERMANENT'] = True
app.config['SESSION_TYPE'] = 'filesystem'
app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(hours=5)

# The maximum number of items the session stores 
# before it starts deleting some, default 500
app.config['SESSION_FILE_THRESHOLD'] = 100  

app.config['SECRET_KEY'] = config.SECRET_KEY
sess = Session()
sess.init_app(app)

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