GAE webapp2会话:创建和检查会话的正确过程 [英] GAE webapp2 session: the correct process of creating and checking sessions
问题描述
我试图实现GAE的webapp2会话,但似乎很少有关于它的文档。根据 http://webapp-improved.appspot.com/api/webapp2_extras/sessions.html,我的步骤如下:
1.配置并添加配置到主应用程序:
config = {}
config ['webapp2_extras.sessions'] = {
'secret_key':'my_secret_key',
}
app = webapp2 .WSGIApplication([...],config = config)
2.在登录处理程序中创建会话
#删除现有会话
- >没有在教程中提到
#成员被发现
self.session_store = sessions.get_store(request = handler.request)
self.session ['account'] = member.account
3.检查程序中各个位置是否存在会话
if self.session ['account']:
#Session存在
4.用户注销时删除会话
- >在本教程中未提及
我的问题:
<在会话创建过程中,我收到了错误信息... object has no attribute'session'(第2步)
li>
如何在步骤2和步骤4中删除会话?
谢谢。
直接回答这个问题,但这是我使用gaesessions而不是GAE的webapp2会话找到的解决方案,我想与大家分享。在这里,我们去: 从 https://github.com/dound/gae-sessions 点击下载ZIP按钮。下载的文件是gae-sessions-master.zip。 解压文件(将创建一个目录gae-sessions-master),并将目录gaessions复制到应用程序的根目录(即app.yaml所在的位置)。 创建一个名为appengine_config的文件。 py放在根目录下,并带有以下内容(复制形式 https:// github .com / dound / gae-sessions / tree / master / demo ):来自gaesessions的 在用户登录时创建会话(变量账户是用户的账户): 检查用户的会话是否存在,如果是,返回用户帐户: p>
导入SessionMiddleware
#原始评论已删除...
#为COOKIE_KDY创建一个随机字符串,字符串必须为
#为永久字符串。可以使用os.urandom(64)函数,但
#不能动态使用它*。
#对于我而言,我只是随机生成一个长度为64
#的字符串并粘贴到此处,如下所示:
COOKIE_KEY ='ppb52adekdhD25dqpbKu39dDKsd .....'
def webapp_add_wsgi_middleware(app):
from google.appengine.ext.appstats导入记录
app = SessionMiddleware(app,cookie_key = COOKIE_KEY)
app =记录。 appstats_wsgi_middleware(app)
返回应用程序
from gaesessions import get_current_session
session = get_current_session()
如果session.is_active():
session.terminate()
#为用户启动一个会话(旧的被终止)
session ['account'] =账户
from gaesessions import get_current_session
def c heckSession():
session = get_current_session()
if session.is_active():
return session ['account']
return False
$ c $当用户注销时删除会话:
def logout():
session = get_current_session()
如果session.is_active():
session.terminate()
ol> 最后,您可以创建一个cron作业来定期清理过期的会话:
cron.yaml:
- 描述:每日会话清理
网址:/ clean_up_sessions
时间表:每天3:00
时区:...(您的时区)
函数:
from gaesessions import delete_expired_sessions $ b $ class clean_up_sessions(webapp2.RequestHandler) :
def get(self):
而不是delete_expired_sessions():
传递
希望这有助于。
I tried to implement GAE's webapp2 session, but there seems very little documentation about it. According to http://webapp-improved.appspot.com/api/webapp2_extras/sessions.html, my steps are as follows:
1.Configure and add config to the main application:
config = {} config['webapp2_extras.sessions'] = { 'secret_key': 'my_secret_key', } app = webapp2.WSGIApplication([...], config=config)
2.Create session in the login handler
# Delete existent session --> not mention in the tutorial # member is found self.session_store = sessions.get_store(request=handler.request) self.session['account'] = member.account
3.Check if a session exists at various locations in my program
if self.session['account']: # Session exists
4.Delete session when user logs out
--> not mentioned in the tutorial
My questions:
I got error message " ... object has no attribute 'session'" during the session creation process (Step 2)
How do I delete a session in steps 2 and 4?
Is the overall session management process correct?
Thanks.
解决方案This may not be a direct answer to the question, but it is a solution I found using gaesessions instead of GAE's webapp2 session and I would like to share with everybody. Here we go:
Download gaesessions from https://github.com/dound/gae-sessions by clicking "Download ZIP" button. The downloaded file is "gae-sessions-master.zip".
Unzip the file (a directory "gae-sessions-master" will be created), and copy the directory "gaessions" to the root directory of your application (i.e., where "app.yaml" is)
Create a file called "appengine_config.py" in the root directory, with the following content (copied form https://github.com/dound/gae-sessions/tree/master/demo):
from gaesessions import SessionMiddleware # Original comments deleted ... # Create a random string for COOKIE_KDY and the string has to # be permanent. "os.urandom(64)" function may be used but do # not use it *dynamically*. # For me, I just randomly generate a string of length 64 # and paste it here, such as the following: COOKIE_KEY = 'ppb52adekdhD25dqpbKu39dDKsd.....' def webapp_add_wsgi_middleware(app): from google.appengine.ext.appstats import recording app = SessionMiddleware(app, cookie_key=COOKIE_KEY) app = recording.appstats_wsgi_middleware(app) return app
Create a session when a user logs in (variable account is the user's account):
from gaesessions import get_current_session session = get_current_session() if session.is_active(): session.terminate() # start a session for the user (old one was terminated) session['account'] = account
Check if the user's session exists, if yes, return user's account:
from gaesessions import get_current_session def checkSession(): session = get_current_session() if session.is_active(): return session['account'] return False
Delete the session when the user logs out:
def logout(): session = get_current_session() if session.is_active(): session.terminate()
Finally, you may create a cron job to clean expired sessions periodically:
cron.yaml:
- description: daily session cleanup url: /clean_up_sessions schedule: every day 3:00 timezone: ... (Your time zone)
Function:
from gaesessions import delete_expired_sessions class clean_up_sessions(webapp2.RequestHandler): def get(self): while not delete_expired_sessions(): pass
Hope this helps.
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