def lookup_current_user():
try:
user = flask.g.user
return
except AttributeError:
pass
# find user
try:
openid = flask.session['openid']
except KeyError:
try:
openid = flask.session['anonymous_openid']
except KeyError:
openid = None
#print 'lookup: '+str(openid)
try:
user = User.lookup(openid)
except UserInvalidId:
user = User.anonymous()
flask.session.pop('openid', None)
flask.session['anonymous_openid'] = user.get_id()
flask.g.user = user
