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main.py
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main.py
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from google.appengine.ext.webapp import template
from google.appengine.ext import ndb
import logging
import os.path
import webapp2
from webapp2_extras import auth
from webapp2_extras import sessions
from webapp2_extras.auth import InvalidAuthIdError
from webapp2_extras.auth import InvalidPasswordError
from google.appengine.api import mail
def user_required(handler):
"""
Decorator that checks if there's a user associated with the current session.
Will also fail if there's no session present.
"""
def check_login(self, *args, **kwargs):
auth = self.auth
if not auth.get_user_by_session():
self.redirect(self.uri_for('login'), abort=True)
else:
return handler(self, *args, **kwargs)
return check_login
class BaseHandler(webapp2.RequestHandler):
@webapp2.cached_property
def auth(self):
"""Shortcut to access the auth instance as a property."""
return auth.get_auth()
@webapp2.cached_property
def user_info(self):
"""Shortcut to access a subset of the user attributes that are stored
in the session.
The list of attributes to store in the session is specified in
config['webapp2_extras.auth']['user_attributes'].
:returns
A dictionary with most user information
"""
return self.auth.get_user_by_session()
@webapp2.cached_property
def user(self):
"""Shortcut to access the current logged in user.
Unlike user_info, it fetches information from the persistence layer and
returns an instance of the underlying model.
:returns
The instance of the user model associated to the logged in user.
"""
u = self.user_info
return self.user_model.get_by_id(u['user_id']) if u else None
@webapp2.cached_property
def user_model(self):
"""Returns the implementation of the user model.
It is consistent with config['webapp2_extras.auth']['user_model'], if set.
"""
return self.auth.store.user_model
@webapp2.cached_property
def session(self):
"""Shortcut to access the current session."""
return self.session_store.get_session(backend="datastore")
def render_template(self, view_filename, params=None):
if not params:
params = {}
user = self.user_info
params['user'] = user
path = os.path.join(os.path.dirname(__file__), 'views', view_filename)
self.response.out.write(template.render(path, params))
# this is needed for webapp2 sessions to work
def dispatch(self):
# Get a session store for this request.
self.session_store = sessions.get_store(request=self.request)
try:
# Dispatch the request.
webapp2.RequestHandler.dispatch(self)
finally:
# Save all sessions.
self.session_store.save_sessions(self.response)
class SignupHandler(BaseHandler):
def get(self):
self.render_template('signup.html')
def post(self):
user_name = self.request.get('username')
email = self.request.get('email')
name = self.request.get('name')
password = self.request.get('password')
last_name = self.request.get('lastname')
if not password or password != self.request.get('confirm_password'):
params = {
'message' : 'Password dont match'
}
self.render_template('signup.html',params)
else:
unique_properties = ['email_address']
user_data = self.user_model.create_user(user_name,
unique_properties,
email_address=email, name=name, password_raw=password,
last_name=last_name, verified=False)
if not user_data[0]: #user_data is a tuple
message = 'Username/email already exists. please login or choose different username/email.'
params = {
'message' : message
}
self.render_template('signup.html',params)
return
user = user_data[1]
user_id = user.get_id()
token = self.user_model.create_signup_token(user_id)
verification_url = self.uri_for('verification', type='v', user_id=user_id,
signup_token=token, _full=True)
email_id = email
mail.send_mail(sender= config['config']['admin'],
to=email_id,
subject="Approve account",
body="""
Respected Sir/Mam,
Your sign up details are as follows:
Name : %s
Email Id : %s
If its authorised, Please click on link below.
%s
Else, please reply back to this mail with details.""" % (name, email, verification_url))
message = 'Thanks for signing up. Please check your mail ccount!'
params = {
'message' : message
}
self.render_template('login.html',params)
class ForgotPasswordHandler(BaseHandler):
def get(self):
self._serve_page()
def post(self):
username = self.request.get('username')
email = self.request.get('email')
user = self.user_model.get_by_auth_id(username)
if not user:
logging.info('Could not find any user entry for username %s', username)
self._serve_page(not_found=True)
return
user_id = user.get_id()
token = self.user_model.create_signup_token(user_id)
verification_url = self.uri_for('verification', type='p', user_id=user_id,
signup_token=token, _full=True)
mail.send_mail(sender = config['config']['admin'],
to=email,
subject="Password Change",
body="""
Respected Sir/Mam,
You requested for changing your account password.
If its you, Please click on link below.
%s
Else, please reply back to this mail with details.""" % verification_url)
message = 'Check mail to verify password change and login again.'
params = {
'message' : message
}
self.render_template('login.html',params)
def _serve_page(self, not_found=False):
params = {
'not_found': not_found
}
self.render_template('forgot.html', params)
class VerificationHandler(BaseHandler):
def get(self, *args, **kwargs):
user = None
user_id = kwargs['user_id']
signup_token = kwargs['signup_token']
verification_type = kwargs['type']
# it should be something more concise like
# self.auth.get_user_by_token(user_id, signup_token)
# unfortunately the auth interface does not (yet) allow to manipulate
# signup tokens concisely
user, ts = self.user_model.get_by_auth_token(int(user_id), signup_token,
'signup')
if not user:
logging.info('Could not find any user with id "%s" signup token "%s"',
user_id, signup_token)
self.abort(404)
# store user data in the session
self.auth.set_session(self.auth.store.user_to_dict(user), remember=True)
if verification_type == 'v':
# remove signup token, we don't want users to come back with an old link
self.user_model.delete_signup_token(user.get_id(), signup_token)
if not user.verified:
user.verified = True
user.put()
params = {
'message': 'User email address has been verified. Please login to access dashboard'
}
self.render_template('login.html', params)
return
elif verification_type == 'p':
# supply user to the page
params = {
'user': user,
'token': signup_token
}
self.render_template('resetpassword.html', params)
else:
logging.info('verification type not supported')
self.abort(404)
class SetPasswordHandler(BaseHandler):
def get(self):
self.redirect('/')
@user_required
def post(self):
password = self.request.get('password')
old_token = self.request.get('t')
if not password or password != self.request.get('confirm_password'):
self.display_message('passwords do not match')
return
user = self.user
user.set_password(password)
user.put()
# remove signup token, we don't want users to come back with an old link
self.user_model.delete_signup_token(user.get_id(), old_token)
self.auth.unset_session()
params = {
'message' : 'Password Updated ! Login with new password.'
}
self.render_template('login.html',params)
class LoginHandler(BaseHandler):
def get(self):
self._serve_page()
def post(self):
username = self.request.get('username')
password = self.request.get('password')
try:
u = self.auth.get_user_by_password(username, password, remember=True,
save_session=True)
v = self.user_model.get_by_auth_id(username)
if v.verified is False:
self.auth.unset_session()
message = 'Email ID not veridfied, Please check your mail'
self._serve_page(message,True)
return
else:
self.redirect(self.uri_for('authenticated'))
except (InvalidAuthIdError, InvalidPasswordError) as e:
logging.info('Login failed for user %s because of %s', username, type(e))
message = 'Invalid password'
self._serve_page( message,True)
def _serve_page(self, message= False, failed=False):
username = self.request.get('username')
auth = self.auth
if not auth.get_user_by_session():
params = {
'username': username,
'failed': failed,
'message' : message
}
self.render_template('login.html', params)
else:
self.redirect(self.uri_for('authenticated'))
class LogoutHandler(BaseHandler):
def get(self):
self.auth.unset_session()
self.redirect(self.uri_for('login'))
class AuthenticatedHandler(BaseHandler):
@user_required
def get(self):
self.render_template('dashboard.html')
config = {
'webapp2_extras.auth': {
'user_model': 'models.User',
'user_attributes': ['name'],
},
'webapp2_extras.sessions': {
'secret_key': 'YOUR_SECRET_KEY'
},
'config' : {
'admin' : '<admin_email_id>'
}
}
app = webapp2.WSGIApplication([
webapp2.Route('/', LoginHandler, name='login'),
webapp2.Route('/signup', SignupHandler),
webapp2.Route('/<type:v|p>/<user_id:\d+>-<signup_token:.+>',
handler=VerificationHandler, name='verification'),
webapp2.Route('/password', SetPasswordHandler),
webapp2.Route('/logout', LogoutHandler, name='logout'),
webapp2.Route('/forgot', ForgotPasswordHandler, name='forgot'),
webapp2.Route('/dashboard', AuthenticatedHandler, name='authenticated')
], debug=True, config=config)
logging.getLogger().setLevel(logging.DEBUG)