django上课笔记4-复习数据库操作-复习模板-Seccion-详细cookie和session的区别

一、复习数据库操作

from django.shortcuts import render,HttpResponse,redirect

def login(request):
if request.method=='GET':
return render(request, 'login.html')
else:
user = request.POST.get('username')
pwd = request.POST.get('passwd')
gender = request.POST.get('gender')
rmb = request.POST.get('rmb')
if user=='alex' and pwd=='123':
#1.生成随机字符串
#2.通过cookie发给客户端
#3.服务端保存随机字符串{'随机字符串':{'username':'alex','age':'36'}}
request.session['username'] = user
request.session['passwd'] = pwd
return redirect('/index/')
else:
return render(request, 'login.html', {'msg': '用户名或密码错误'})

# def abc(request):
#     request.session.delete(request.session.session_key)
#     v = request.session.session_key
#     if not v:
#         return HttpResponse('清空session成功')
#     else:
#         return HttpResponse(str(v))

def index(request):
if request.method=='GET':
#1.获取客户端cookie中的随机字符串
#2.去session中查找有没有随机字符串
#3.去session对应key的value中查找是否有username
v = request.session.get('username')
if v:
return render(request, 'index.html')
else:
return HttpResponse('登录失败')

问题:
Invalid HTTP_HOST header: '127.0.0.1:8000'. You may need to add '127.0.0.1' to ALLOWED_HOSTS.
解决方法:
myapp
settings.py
在ALLOWED_HOSTS = []里改成ALLOWED_HOSTS = ["127.0.0.1"]

 四、详细cookie和session的区别

cookie和session的区别