简介
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
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='', password='') # 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()
存到redis中
memcached
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redis
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()
memcached存储
filesystem
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redis
app.config[
'SESSION_FILE_DIR'] = '/Users/wupeiqi/PycharmProjects/grocery/96.Flask新课程/组件/2.flask-session' # session类型为redis
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()
filesystem存储
mongodb
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redis 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存储
mongodb操作简单示例：
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': 'xxx',
'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': 'xxx'})
实例
sqlalchemy
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()
sqlalchemy存储
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 $ 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()
>>>