flask-session是flask框架的session组件，由于原来flask内置session使用签名cookie保存，该组件则将支持session保存到多个地方，如：
- redis
- memcached
- filesystem
- mongodb
- sqlalchmey
安装
pip3 install flask-session
存储方式
redis
#!/usr/bin/env python # -*- coding:utf-8 - import redis from flask import Flask, session from flask_session import Session app = Flask(__name__) app.debug = True app.secret_key = 'xxxx' app.config['SESSION_TYPE'] = 'redis' # session类型为redis app.config['SESSION_PERMANENT'] = False # 如果设置为True，则关闭浏览器session就失效。 app.config['SESSION_USE_SIGNER'] = False # 是否对发送到浏览器上session的cookie值进行加密 app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀 app.config['SESSION_REDIS'] = redis.Redis(host='127.0.0.1', port='6379', password='123123') # 用于连接redis的配置 Session(app) @app.route('/index') def index(): session['k1'] = 'v1' return 'xx' if __name__ == '__main__': app.run()
memcached
#!/usr/bin/env python # -*- coding:utf-8 - import redis from flask import Flask, session from flask_session import Session import memcache app = Flask(__name__) app.debug = True app.secret_key = 'xxxx' app.config['SESSION_TYPE'] = 'memcached' # session类型为memcached app.config['SESSION_PERMANENT'] = True # 如果设置为True，则关闭浏览器session就失效。 app.config['SESSION_USE_SIGNER'] = False # 是否对发送到浏览器上session的cookie值进行加密 app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀 app.config['SESSION_MEMCACHED'] = memcache.Client(['10.211.55.4:12000']) Session(app) @app.route('/index') def index(): session['k1'] = 'v1' return 'xx' if __name__ == '__main__': app.run()
filesystem
#!/usr/bin/env python # -*- coding:utf-8 - import redis from flask import Flask, session from flask_session import Session app = Flask(__name__) app.debug = True app.secret_key = 'xxxx' app.config['SESSION_TYPE'] = 'filesystem' # session类型为filesystem app.config[ 'SESSION_FILE_DIR'] = '/Users/wupeiqi/PycharmProjects/grocery/96.Flask新课程/组件/2.flask-session' app.config['SESSION_FILE_THRESHOLD'] = 500 # 存储session的个数如果大于这个值时，就要开始进行删除了 app.config['SESSION_FILE_MODE'] = 384 # 文件权限类型 app.config['SESSION_PERMANENT'] = True # 如果设置为True，则关闭浏览器session就失效。 app.config['SESSION_USE_SIGNER'] = False # 是否对发送到浏览器上session的cookie值进行加密 app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀 Session(app) @app.route('/index') def index(): session['k1'] = 'v1' session['k2'] = 'v1' return 'xx' if __name__ == '__main__': app.run()
mongodb
#!/usr/bin/env python # -*- coding:utf-8 - import redis from flask import Flask, session from flask_session import Session import pymongo app = Flask(__name__) app.debug = True app.secret_key = 'xxxx' app.config['SESSION_TYPE'] = 'mongodb' # session类型为mongodb app.config['SESSION_MONGODB'] = pymongo.MongoClient() app.config['SESSION_MONGODB_DB'] = 'mongo的db名称（数据库名称）' app.config['SESSION_MONGODB_COLLECT'] = 'mongo的collect名称（表名称）' app.config['SESSION_PERMANENT'] = True # 如果设置为True，则关闭浏览器session就失效。 app.config['SESSION_USE_SIGNER'] = False # 是否对发送到浏览器上session的cookie值进行加密 app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀 Session(app) @app.route('/index') def index(): session['k1'] = 'v1' session['k2'] = 'v1' return 'xx' if __name__ == '__main__': app.run()
mongodb操作简单示例：
#!/usr/bin/env python # -*- coding:utf-8 -*- from pymongo import MongoClient # 创建链接 conn = MongoClient('47.93.4.198', 27017) # 选择数据库 db = conn['db1'] # 选择表 posts = db['posts'] post_data = { 'name': 'alex', 'age': 18 } # 表中插入数据 # result = posts.insert_one(post_data) # 获取一条数据 # row = posts.find_one() # print(row) # # 获取多条数据 # rows = posts.find() # for row in rows: # print(row) # 删除多条数据 # rows = posts.delete_many(filter={}) # print(rows) # 更新多条数据 # posts.update({}, {'name': 'wupeiqi'})
sqlalchemy
#!/usr/bin/env python # -*- coding:utf-8 - import redis from flask import Flask, session from flask_session import Session as FSession from flask_sqlalchemy import SQLAlchemy app = Flask(__name__) app.debug = True app.secret_key = 'xxxx' # 设置数据库链接 app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:123@127.0.0.1:3306/fssa?charset=utf8' app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True # 实例化SQLAlchemy db = SQLAlchemy(app) app.config['SESSION_TYPE'] = 'sqlalchemy' # session类型为sqlalchemy app.config['SESSION_SQLALCHEMY'] = db # SQLAlchemy对象 app.config['SESSION_SQLALCHEMY_TABLE'] = 'session' # session要保存的表名称 app.config['SESSION_PERMANENT'] = True # 如果设置为True，则关闭浏览器session就失效。 app.config['SESSION_USE_SIGNER'] = False # 是否对发送到浏览器上session的cookie值进行加密 app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀 FSession(app) @app.route('/index') def index(): session['k1'] = 'v1' session['k2'] = 'v1' return 'xx' if __name__ == '__main__': app.run()
PS: 在写好代码后，不要着急运行，需要先执行进入终端执行一条创建数据库表的命令：
bogon:pro-flask huchog$ python3 Python 3.5.1 (v3.5.1:37a07cee5969, Dec 5 2015, 21:12:44) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> from app import db >>> db.create_all() >>>
应用场景
如果应用程序比较大，就用flask-session，比如用redis保存
如果应用程序比较小，就用原生的加密cookie 保存session(内置)即可