bottle的cookie操作小记(获取不是在当前页面创建的cookie)

Sat 02 June 2012

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.

Category: Python Tagged: web python cookie bottle

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