Django-session相关操作+redis

• 项目结构 demo中的url配置
  • 

from django.urls import path,include


urlpatterns = [
    path(r'sess/', include('sess.urls'))
]

• sess中url配置

from django.urls import path
from sess import views


urlpatterns = [
    path('index/', views.index),
    path('info/', views.info),
    path('delete/session/', views.delete_session),
    path('login/', views.login)
]

• sess-views中实现了未登录跳转至登录页面，登录后跳转至首页功能，

  delete_session，清除数据

• session的操作

  - 添加session:request.session['name'] = 'zhangsan'
  - 获取session中的值: request.session.get('name')
  - 删除一条key-value: del request.session['name']
  - 删除全部内容: request.session.clear()
  - 删除在存储中session记录: request.session.flush()

import datetime

from django.http import HttpResponse, JsonResponse
from django.shortcuts import redirect
from django.shortcuts import render


def index(request):
    print(type(request.session))
    #设置session
    #request.session['username'] = 'chen'
    #设置过期时间
    #request.session.set_expiry(30)
    # 返回Json字符串
    return HttpResponse('首页')


def login(request):
    if request.method == 'GET':
        # 渲染页面
        return render(request, 'login.html')
    else:
        # post请求,说明要提交登录的数据
        username = request.POST.get('username')
        password = request.POST.get('password')
        # 登录成功
        # 在session中记录用户信息
        request.session['username'] = username
        request.session['password'] = password
        return redirect('/sess/index/')


#登录之后才可访问页面
def info(request):
    # 先判断是否登录
    # 如果登录了那么可以正常访问.
    # 如果没登录, 就跳转到登录页面.
    username = request.session.get('username')
    if username:
        # 登录成功, 正常显示页面
        return HttpResponse(f"hell {username}")
    else:
        # 没登录, 跳转去登录页面
        return redirect('/sess/login/')

def delete_session(request):
    #单独删除key的session
    #del request.session['username']
    #request.session.clear()
    request.session.flush()
    return HttpResponse('deleting success')

• 连接redis做30秒缓存数据-30秒后刷新数据清除
• django本身没有实现存储session到redis的功能, 需要借助第三方的包django-redis
• pip install django-redis==4.10.0 -i https://pypi.douban.com/simple
• demo中需填写下redis配置

• STATIC_URL = '/static/'
  
  CACHES = {
      "default": {
          "BACKEND": "django_redis.cache.RedisCache",
          "LOCATION": "redis://127.0.0.1:6379/1",
          "OPTIONS": {
              "CLIENT_CLASS": "django_redis.client.DefaultClient",
          }
      }
  }
  SESSION_ENGINE = "django.contrib.sessions.backends.cache"

•