2. 自己设置cookie和session
2.1
-
重新写url,增加一个用户注册界面
- 建立用户表
class User(models.Model):
username = models.CharField(max_length=40)
password = models.CharField(max_length=255)
create_time = models.DateTimeField(auto_now_add=True)
session_id = models.CharField(max_length=30, null=True)
out_time = models.DateTimeField(null=True)
class Meta:
db_table = 'user'
- 用户注册函数
def my_register(request):
if request.method == 'GET':
return render(request,'backweb/my_register.html')
if request.method == 'POST':
username = request.POST.get('username')
password1 = request.POST.get('password1')
password2 = request.POST.get('password2')
# 验证用户是否存在
user = User.objects.filter(username=username).exists()
if user:
error = '用户名已被注册'
return render(request,'backweb/my_register.html', {'error':error})
else:
if password1 == password2:
User.objects.create(username=username, password=password1)
return HttpResponseRedirect(reverse('backweb:my_login'))
else:
error = '两次密码不一致'
return render(request,'backweb/my_register.html', {'error':error})
- 登录函数,并创建cookie
登录的时候,设置cookie中的随机字符串session_id *
向服务端保存这个字符串
def my_login(request):
if request.method == 'GET':
return render(request, 'backweb/login.html')
if request.method == 'POST':
username = request.POST.get('username')
password = request.POST.get('password')
user = User.objects.filter(username=username, password=password).first()
if user:
# 账号密码正确
# 第一步,cookie中设值
res = HttpResponseRedirect(reverse('backweb:index'))
s = 'abcdefghijklmnopqrstuvwxyz1234567890'
session_id = '' # 工作中叫车票
for i in range(20):
session_id += random.choice(s)
out_time = datetime.now() + timedelta(1) # 过期时间,设置为1天
res.set_cookie('session_id', session_id, expires=out_time)
# 第二部,服务器存cookie中设的值
user.session_id = session_id
user.out_time = out_time
user.save()
return res
else:
error = '用户名或者密码错误'
return render(request, 'backweb/login.html', {'error': error})
2.2中间键(有5个): 拦截,过滤请求:
- 获取cookie中的随机字符串
- 在服务端进行校验,半段cookie中的随机字符串是否在服务器中保存,并拿到相关的用户信息
- 判断,如果拿不到用户的信息,则让用户跳转到登录
a. 建立中间键(扩展包-utils,导入相关模块)
image.png
b. settings.py配置,注意修改跳转路径
image.png
c. 中间键分类 :
process_request(self,request)
process_view(self, request, view_func, view_args, view_kwargs)
process_template_response(self,request,response)
process_exception(self, request, exception)
process_response(self, request, response)
