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.