def logout():
"""
A function to perform logout.
"""
TwitterOAuth.clear_user(app.get_controller())
app.session['message'] = 'logged out'
app.session.put()
app.redirect('/')
def oauth():
"""
A function to receive oauth redirection.
It passes information in url to TwitteroauthController._post_action()
"""
controller = TwitteroauthController(app.get_handler())
auth_obj = TwitterOAuth()
auth_obj.request = app.request
auth_obj.request.args = app.request.params
auth_obj.get_authenticated_user(controller._post_action)
def get_current_user(cls, app):
"""
A method to obtain current login user.
It returns None when no user is logging in.
"""
tuser = TwitterOAuth.get_user(app.get_controller())
if tuser:
user = User.get_user(tuser['nickname'])
return user
return None
def index(self):
"""
A method to receive redirection from twitter's site.
Twitter gives token to an application by using
oauth_token get parameter.
"""
token = self.params.get('oauth_token')
self.auth_obj = TwitterOAuth()
self.auth_obj.request = self.request
self.auth_obj.request.args = self.request.params
self.auth_obj.get_authenticated_user(self._post_action)
def login():
"""
A function to perform login to post images.
"""
tuser = TwitterOAuth.get_user(app.get_controller())
user = User.get_current_user(app)
if not user:
user = User(username = tuser['nickname'])
user.name = tuser['realname']
user.profile_image_url = tuser['icon_url']
user.put()
app.session['message'] = 'logged in'
app.session.put()
app.redirect('/')
class TwitteroauthController(MakoTemplateController):
"""
A controller to set parameters in cookie sent from twitter.
It works after redirection from twitter's site
after user pushes allow button.
It receives authentication id in get parameter,
obtain user information at index() method
and set informations of user to memcache.
"""
def __init__(self, hnd, params = {}):
"""
An initialize method.
"""
super(TwitteroauthController, self).__init__(hnd, params)
self.auth_obj = None
@expose
def index(self):
"""
A method to receive redirection from twitter's site.
Twitter gives token to an application by using
oauth_token get parameter.
"""
token = self.params.get('oauth_token')
self.auth_obj = TwitterOAuth()
self.auth_obj.request = self.request
self.auth_obj.request.args = self.request.params
self.auth_obj.get_authenticated_user(self._post_action)
def _post_action(self, user):
"""
A method to put twitter user information to memcache
and redirect to original page.
It is called via callback set to get_authenticated_user() method.
The method obtain user information from twitter, pass it to this
method. This method stores the information to memcache.
:param user : user information of twitter.
"""
if user:
d = {'type':TwitterOAuth.TYPE,
'nickname':user.get('username', ''),
'email':'',
'userid':user.get('id', ''),
'realname':user.get('name', ''),
'icon_url':user.get('profile_image_url', ''),
}
token = user.get('access_token', '')
if token:
if token.get('secret', '') and token.get('key', ''):
d['access_secret'] = token.get('secret', '')
d['access_key'] = token.get('key', '')
memcache.set(self.cookies.get(OAUTH_ACCESS_TOKEN_COOKIE),
d, namespace = TWITTER_NAMESPACE, time = EXPIRE)
rurl = self.session.get('referer', '')
if rurl:
# clear 'referer' key in session object.
del self.session['referer']
self.session.put()
self.redirect(rurl)
else:
self.redirect('/')
self.render('blank')
def twitter_request(self, path, access_token, callback = None,
post_args = None, **args):
"""
A method to send request to twitter, by using informations in auth_obj.
"""
api = self.auth_obj
if not api:
raise ValueError(("auth_obj is None. You must do "
"oauth authentication before sending request."))
if not callback:
callback = self._dummy_callback
api.twitter_request(
path,
post_args = post_args,
access_token = access_token,
callback = callback)
def _dummy_callback(self, arg):
"""
Dummy callback. Do nothing.
"""
pass