瓶子应用的Cork认证问题：TypeError("'NoneType'对象不支持项赋值",)

Question

我在用Cork库和Bottle应用程序时遇到了一些问题。我尝试设置示例应用程序，并做了一些小改动让它能在WSGI容器中运行。主要的改动是我把这个：

if __name__ == "__main__":
    main()

改成了这个：

application = default_app()

当我用管理员用户进行身份验证时，我得到了以下内容：

Traceback (most recent call last):
  File "/path_to_app/lib/python2.7/bottle-0.11.4-py2.7.egg/bottle.py", line 763, in _handle
    return route.call(**args)
  File "/path_to_app/lib/python2.7/bottle-0.11.4-py2.7.egg/bottle.py", line 1572, in wrapper
    rv = callback(*a, **ka)
  File "/path_to_app/cork-example/simple_webapp.py", line 47, in login
    aaa.login(username, password, success_redirect='/', fail_redirect='/login')
  File "build/bdist.linux-x86_64/egg/cork/cork.py", line 209, in login
    self._setup_cookie(username)
  File "build/bdist.linux-x86_64/egg/cork/cork.py", line 610, in _setup_cookie
    session['username'] = username
TypeError: 'NoneType' object does not support item assignment

当我尝试查看主页时，我遇到了这个错误：

Traceback (most recent call last):
  File "/path_to_app/lib/python2.7/bottle-0.11.4-py2.7.egg/bottle.py", line 763, in _handle
    return route.call(**args)
  File "/path_to_app/lib/python2.7/bottle-0.11.4-py2.7.egg/bottle.py", line 1572, in wrapper
    rv = callback(*a, **ka)
  File "/path_to_app/cork-example/simple_webapp.py", line 90, in index
    aaa.require(fail_redirect='/login')
  File "build/bdist.linux-x86_64/egg/cork/cork.py", line 267, in require
    cu = self.current_user
  File "build/bdist.linux-x86_64/egg/cork/cork.py", line 417, in current_user
    username = session.get('username', None)
AttributeError: 'NoneType' object has no attribute 'get'

我是不是犯了什么新手错误？还是说其他地方出了问题？

Answer 1

我搞明白了。这是个新手错误。Bottle的文档里说，如果你想用Bottle和mod_wsgi一起工作，在文件的最后部分，你应该使用这个：

application = default_app()

在我更好地理解这一切是怎么运作之后，我意识到我把错误的应用对象发送给了mod_wsgi。其实，我应该使用这个：

application = app #app was defined earlier in the example application