response.set_cookie("cookie_key","value")

value = request.COOKIES["cookie_key"]

response.delete_cookie("cookie_key",path="/",domain=name)

if "cookie_name" in request.COOKIES :

login_user = models.User.objects.get(username=username, password=password) # 这里用的mongodb进行的数据存储
# print(login_user["username"])
# 帐号和密码正确，cookie保存登录状态
# 获取相应对象
response = redirect(reverse("blog:index"))
# 设置cookie
response.set_cookie("blog_username", login_user["username"], 604800) #过期时间单位是s (这里设置为7天)
response.set_cookie("blog_password", login_user["password"], 604800)

def index(request):
 # 检测cookies是否存在
 if "blog_username" in request.COOKIES:
  # 获取cookies
  login_username = request.COOKIES.get("blog_username")
  login_password = request.COOKIES.get("blog_password")
  # 获取登录用户信息
  login_user = models.User.objects.get(username=login_username, password=login_password)
  # 返回登录成功后页面
  return render(request, "blog/index.html", {"login_user": login_user})
 else:
  # 进入未登录状态的主页
  return render(request, "blog/index.html")

# 注销登录视图函数
def logout(request):
 response = redirect(reverse("blog:index"))
 response.delete_cookie("blog_username")
 response.delete_cookie("blog_password")
 return response