07 Redis存储Session

django-redis-sessions 官方文档：https://pypi.org/project/django-redis-sessions/

dango-redis 官方文档：http://niwinz.github.io/django-redis/latest/#_configure_as_cache_backend

安装模块：

 安装模块
  pip3 install django-redis-sessions
 或者
 pip3 install django-redis

本文这里用的是django 2.0语法，创建django项目

django-admin startproject mydjango

修改settings.py文件加入字段：

 CACHES = {
     "default": {
         "BACKEND": "django_redis.cache.RedisCache",
         "LOCATION": "redis://127.0.0.1:6379/0",
         "OPTIONS": {
             "CLIENT_CLASS": "django_redis.client.DefaultClient",
             "PASSWORD": "",
 #             "PARSER_CLASS": "redis.connection.HiredisParser",
 #             "SOCKET_TIMEOUT": 10,
 #             "CONNECTION_POOL_CLASS_KWARGS": {
 #                 "max_connections": 2,
 #             }
         }
     }
 }
 
 #SESSION_COOKIE_AGE = 30 * 60 #设置session过期时间为30分钟
 SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

创建webapp

django-admin startapp app01

编写session视图函数 webapp.views

 from django.shortcuts import render,HttpResponse
 
 def set_session(request):
     request.session['username']='zhanan'
     request.session['age']=18
     return HttpResponse("设置sesson成功")
 
 def get_session(request):
     username=request.session['username']
     age = request.session['age']
     return HttpResponse(username+":"+str(age))

添加url路由

vim mydjango/urls.py

 from django.contrib import admin
 from django.urls import path
 from webapp import views
 urlpatterns = [
     path('set_session/',views.set_session),
     path('get_session/',views.get_session),
     path('admin/', admin.site.urls),

确保启动redis服务端，默认方式启动

redis-server &
 
redis-cli 连接无误
发送ping命令得到pong即可

启动django

python3 manage.py runserver 0.0.0.0:8000

访问视图，设置一条session信息，存入redis数据库

检查redis数据库，是否存在一条key

 127.0.0.1:6379> keys *
 1) ":1:django.contrib.sessions.cachep220moqvxclz2hyjqmbybqs3v8ck2i39"
 
 获取这个key的值
 127.0.0.1:6379> get :1:django.contrib.sessions.cachep220moqvxclz2hyjqmbybqs3v8ck2i39
 "\x80\x04\x95!\x00\x00\x00\x00\x00\x00\x00}\x94(\x8c\busername\x94\x8c\x06chaoge\x94\x8c\x03age\x94K\x12u."