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Django入门到放弃之cookies

作者:互联网

1.获取Cookie

request.COOKIES
request.COOKIES['key']
# 获取带签名的cookie
request.get_signed_cookie(key, default=RAISE_ERROR, salt='', max_age=None)  #获取signed类型cookies
      default: 默认值
      salt: 加密盐
      max_age: 后台控制过期时间

2.设置Cookie

rep = HttpResponse(...)
rep = render(request, ...)

rep.set_cookie(key,value,...)
# 带签名的cookie
rep.set_signed_cookie(key,value,salt='加密盐', max_age=None, ...)
return rep
    参数:
      key, 键
      value='', 值
      max_age=None, 超时时间
      expires=None, 超时时间(IE requires expires, so set it if hasn't been already.)
      path='/', Cookie生效的路径,/ 表示根路径,特殊的:根路径的cookie可以被任何url的页面访问
      domain=None, Cookie生效的域名
      secure=False, https传输
      httponly=False 只能http协议传输,无法被JavaScript获取(不是绝对,底层抓包可以获取到也可以被覆盖)

3.删除Cookie

def logout(request):
    rep = redirect("/login/")
    rep.delete_cookie("user")  # 删除用户浏览器上之前设置的usercookie值,实质是将浏览器的cookies清空
    return rep

4.django中cookie的使用

# 0 会话跟踪,会话保持
# 1 cookie规范
	-记住:当前网站在浏览器上cookie个数和大小有限制
 	-Cookie大小上限为4KB; 
 	-一个服务器最多在客户端浏览器上保存20个Cookie; 
 	-一个浏览器最多保存300个Cookie;
# 2 django中操作cookie
	-增:obj.set_cookie('key','value')
    -删: obj.delete_cookie('key')  # 设置过期
    -查: request.COOKIES.get('key')
    -改: obj.set_cookie('key','value1')
# 3 带签名的cookie(加盐,加密)
	-增:obj.set_signed_cookie('name','lqz','123')
    -删: obj.delete_cookie('name')  # 设置过期
    -查: request.get_signed_cookie('name',salt='123')
    -改: obj.set_signed_cookie('name','lqz','123')

5.登录认证示例:

def login_auth(func):
    def inner(request,*args,**kwargs):
        is_login = request.COOKIES.get('is_login')
        print(is_login)
        if is_login == 'True':
            res = func(request,*args,**kwargs)
            print('##############################')
            return res
        else:
            
            return redirect('login')
    return inner

@login_auth
def index(request):
        return render(request, 'cookies/index.html')


@login_auth
def home(request):
        return render(request, 'cookies/home.html')



def login(request):
    if request.method == 'GET':
        return render(request, 'cookies/login.html')
    else:
        username = request.POST.get('username')
        password = request.POST.get('password')

        if username == 'bge' and password == '666':
            path = request.GET.get('returnurl')
            if path:
                ret = redirect(path})
            else
	            ret = redirect('index')
            ret.set_cookie('is_login',True)
            return ret
        else:
            return HttpResponse('登录失败')

  

 

标签:cookies,set,return,入门,request,Django,cookie,key,login
来源: https://www.cnblogs.com/panwenbin-logs/p/16631773.html