Python的Bottle框架中获取制定cookie的教程

这两天为用bottle+mongodb写的一个项目加上登录功能,无奈怎么都获取不到保存的cookie,文档给出让我们这样操作cookie的代码片段:

    @route('/login')
    def login ():
       username = request .forms .get('username ')
       password = request .forms .get('password ')
       if check_user_credentials(username, password):
          response .set_cookie("account", username, secret= 'some-secret-key')
          return "Welcome %s!You are now logged in." % username
       else :
          return "Login failed." 

    @route('/restricted')
    def restricted_area ():
       username = request .get_cookie("account", secret= 'some-secret-key')
       if username:
          return "Hello %s.Welcome back." % username

虽然文档上没有但是还有一种操作cookie的方式:

    from bottle import request, response

    @route('/login', method="POST")
    def login():
      user = request.POST['user']
      passwd = request.POST['passwd']

      if check_user_right(user,passwd):
        response.COOKIES['account'] = user
      else:
        pass

    @route('/admin')
    def admin():
      user = request.COOKIES['user']
      if user:
        pass

但是无论我用哪种方式操作我都无法获取cookie,为什么呢.百思不得其解.但是我的一个处理文章点击率的提醒了我,代码如下:

    @route('/archrives/:aid#\d+#')
    def article_show(aid):
      db = dbconn.ConnDB()
      artid = int(aid)
      # 获取客户端ip
      remoteip = request.environ.get('REMOTE_ADDR')

      artcookie = remoteip+'ip'+aid
      print request.COOKIES.keys()

      # 判断cookie是否存在
      if artcookie in request.COOKIES.keys():
        # 存在则更新有效时间
        response.COOKIES[artcookie] = True
        response.COOKIES[artcookie]['max-age'] = 500
      else:
        # 不存在则更新文章查看次数
        db.posts.update({"id":artid}, {"$inc":{"views":1}})

        # 并设置cookie
        response.COOKIES[artcookie] = True
        response.COOKIES[artcookie]['max-age'] = 500

      TEMPLATE['posts'] = getArtList({"id":artid})
      TEMPLATE.update(setTempVar())

      return template('article.html', TEMPLATE)

这里是可以正常获取到cookie的,而且代码没有任何区别.唯一的区别就是用户认证是跳转了页面.所以我help了一下:

    from bottle import response
    help(response.set_cookie)

help的结果其中有两个参数一个是path,和domain:

     :param domain: the domain that is allowed to read the cookie.
       (default: current domain)
      :param path: limits the cookie to a given path (default: current path)

明显bottle的cookie默认只在当前路径下能读取的到,所以要别的页面读取到cookie我们的代码须改成如下:

    from bottle import request, response

    @route('/login', method="POST")
    def login():
      user = request.POST['user']
      passwd = request.POST['passwd']

      if check_user_right(user,passwd):
        response.COOKIES['account'] = user
        response.COOKIES['account']['path'] = '/admin'
      else:
        pass

    @route('/admin')
    def admin():
      user = request.COOKIES['user']

这样我们就能在别的路径下访问我们设定的cookie.