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project.py
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project.py
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__author__ = 'Suraj'
from flask import Flask, render_template, url_for, request, redirect, flash, jsonify
from flask import session as login_session
import random, string
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from database_setup import Base, Restaurant, MenuItem, User
from oauth2client.client import flow_from_clientsecrets
from oauth2client.client import FlowExchangeError
import httplib2
import json
from flask import make_response
import requests
from functools import wraps, partial
# Connect to database and create a database session object
engine = create_engine('sqlite:///restaurantmenuwithusers.db')
Base.metadata.bind = engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
app = Flask(__name__)
CLIENT_ID = json.loads(
open('client_secrets.json', 'r').read())['web']['client_id']
FB_CLIENT_ID = json.loads(open('fb_client_secrets.json', 'r').read())['web']['client_id']
APPLICATION_NAME = "Restaurant Menu Application"
def createUser(login_session):
newUser = User(name=login_session['username'], email=login_session[
'email'], picture=login_session['picture'])
session.add(newUser)
session.commit()
user = session.query(User).filter_by(email=login_session['email']).one()
login_session['user_id'] = user.id
return user.id
def getUserInfo(user_id):
user = session.query(User).filter_by(id=user_id).one()
return user
def getUserID(email):
try:
user = session.query(User).filter_by(email=email).one()
return user.id
except:
return None
@app.route('/login')
def showLogin():
# Create anti forgery state token
state = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(32))
login_session['state'] = state
# return "The current session state is {}".format(login_session['state'])
return render_template('login.html', client_id=CLIENT_ID, fb_client_id=FB_CLIENT_ID, STATE=state)
def ensureLogin(func):
@wraps(func)
def decorated_function(*args, **kwargs):
if 'username' not in login_session:
flash("You need to login to complete this action")
return redirect(url_for('showLogin'))
return func(*args, **kwargs)
return decorated_function
def ensureOwner(restaurant_id=None, menu_id=None):
if restaurant_id is None and menu_id is not None:
menu_item = session.query(MenuItem).filter_by(id=menu_id).one()
if menu_item.user_id == login_session['user_id']:
return True
elif restaurant_id is not None and menu_id is None:
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if restaurant.user_id == login_session['user_id']:
return True
return False
# For more details on oauth2 flow with google, visit https://developers.google.com/identity/protocols/OAuth2WebServer
# The implementation below is slightly different
# The ajax portion in the login will call this function
@app.route('/gconnect', methods=['POST'])
def gconnect():
# Validate state token
# First check if the state_token of the server when the user clicked login is same as the state_token
# when the user POSTs. Otherwise, it may be a malicious attack on the server
if request.args.get('state') != login_session['state']:
response = make_response(json.dumps("Invalid state token"), 401)
response.headers['Content-Type'] = 'application/json'
return response
print("Verified state token, so it is the same user")
# The code here is the data sent in the ajax call to this server. It was received from google when the user
# approved the request
code = request.data
try:
# convert the authorization code into a credential object by talking to the token_uri from client_secrets
# this object will contain the access token and the refresh token
oauth_flow = flow_from_clientsecrets('client_secrets.json', scope='')
oauth_flow.redirect_uri = 'postmessage'
credentials = oauth_flow.step2_exchange(code)
print("Converted auth code to credentials object by talking to the token uri in client secrets")
except FlowExchangeError:
response = make_response(json.dumps('Failed to upgrade the authorization code.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Validate access token in the credentials object
access_token = credentials.access_token
url = ('https://www.googleapis.com/oauth2/v1/tokeninfo?access_token={}'.format(access_token))
h = httplib2.Http()
result = json.loads(h.request(url, 'GET')[1])
print("Used access token from credentials object to obtain token info from the google apis")
if result.get('error') is not None:
response = make_response(json.dumps(result.get('error')), 500)
response.headers['Content-Type'] = 'application/json'
return response
# Verify the access token is used for the right user
# The sub here is REQUIRED. Subject Identifier. A locally unique and
# never reassigned identifier within the Issuer for the End-User, which is intended to be consumed by the Client
# This should be same as the user_id in the result object obtained by querying tokeninfo on googleapis
gplus_id = credentials.id_token['sub']
if result['user_id'] != gplus_id:
response = make_response(json.dumps("Token's user id does not match given user id"), 401)
response.headers['Content-Type'] = 'application/json'
return response
print("id token in the credentials object matches the user id in the tokeninfo")
# Verify the access token is valid for the web server
if result['issued_to'] != CLIENT_ID:
response = make_response(json.dumps("Token's client ID does not match the app"), 401)
response.headers['Content-Type'] = 'application/json'
return response
print("tokeninfo's client id matches the app's client id")
# Check to see if a user is already logged in
stored_credentials = login_session.get('credentials')
stored_gplus_id = login_session.get('gplus_id')
if stored_credentials is not None and stored_gplus_id == gplus_id:
response = make_response(json.dumps("Current user already connected"), 200)
response.headers['Content-Type'] = 'application/json'
return response
# Store the access token in the session for later use.
login_session['credentials'] = credentials
login_session['gplus_id'] = gplus_id
# Get user info by passing in the access token
userinfo_url = "https://www.googleapis.com/oauth2/v1/userinfo"
params = {'access_token': credentials.access_token, 'alt': 'json'}
answer = requests.get(userinfo_url, params=params)
data = answer.json()
login_session['access_token'] = access_token
login_session['username'] = data['name']
login_session['picture'] = data['picture']
login_session['email'] = data['email']
login_session['user_id'] = getUserID(login_session['email'])
if login_session['user_id'] is None:
createUser(login_session)
print(login_session['user_id'])
output = ''
output += '<h1>Welcome, '
output += login_session['username']
output += '!</h1>'
output += '<img src="'
output += login_session['picture']
output += ' " style = "width: 300px; height: 300px;border-radius: 150px;-webkit-border-radius: 150px;-moz-border-radius: 150px;"> '
flash("you are now logged in as {}".format(login_session['username']))
print("done!")
return output
@app.route('/fbconnect', methods=['POST'])
def fbconnect():
if request.args.get('state') != login_session['state']:
print("State token is invalid: ")
print("Expected: {}".format(login_session['state']))
print("Got: {}".format(request.args.get('state')))
response = make_response(json.dumps("Invalid state token"), 401)
response.headers['Content-Type'] = 'application/json'
return response
print("Verified state token, so it is the same user")
# The code here is the data sent in the ajax call to this server. It was received from google when the user
# approved the request
access_token = request.data
# Exchange this short lived token for a long lived server side token
app_id = json.loads(open('fb_client_secrets.json', 'r').read())['web']['client_id']
app_secret = json.loads(open('fb_client_secrets.json', 'r').read())['web']['client_secret']
url = 'https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id={}' \
'&client_secret={}&fb_exchange_token={}'.format(app_id, app_secret, access_token)
h = httplib2.Http()
result = h.request(url, 'GET')[1]
token = result.split("&")[0]
# Use token to get user info
userinfo_url = "https://graph.facebook.com/v2.5/me?{}&fields=name,id,email".format(token)
h = httplib2.Http()
result = h.request(userinfo_url, 'GET')[1]
data = json.loads(result)
print(data)
login_session['username'] = data['name']
login_session['email'] = data['email']
login_session['facebook_id'] = data['id']
# Retrieve profile pic URL
pic_url = "https://graph.facebook.com/v2.5/me/picture?{}&redirect=0&height=200&width=200".format(token)
pic = requests.get(pic_url).json()
print(pic)
login_session['picture'] = pic['data']['url']
login_session['user_id'] = getUserID(login_session['email'])
if login_session['user_id'] is None:
createUser(login_session)
print(login_session['user_id'])
output = ''
output += '<h1>Welcome, '
output += login_session['username']
output += '!</h1>'
output += '<img src="'
output += login_session['picture']
output += ' " style = "width: 300px; height: 300px;border-radius: 150px;-webkit-border-radius: 150px;-moz-border-radius: 150px;"> '
flash("you are now logged in as {}".format(login_session['username']))
print("done!")
return output
@app.route('/fbdisconnect')
def fbdisconnect():
access_token = login_session.get('access_token')
facebook_id = login_session.get('facebook_id')
print('In fbdisconnect access token is {}'.format(access_token))
print('User name is: ')
print(login_session.get('username'))
if access_token is None:
print('Access Token is None')
response = make_response(json.dumps('Current user not connected.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
url = 'https://graph.facebook.com/{}/permissions?access_token={}'.format(facebook_id,access_token)
print(url)
h = httplib2.Http()
result = h.request(url, 'DELETE')[1]
print('result is ')
print(result)
if result['status'] == '200':
response = make_response(json.dumps('Successfully disconnected.'), 200)
response.headers['Content-Type'] = 'application/json'
return response
else:
response = make_response(json.dumps('Failed to revoke token for given user.', 400))
response.headers['Content-Type'] = 'application/json'
return response
@app.route('/gdisconnect')
def gdisconnect():
access_token = login_session.get('access_token')
print('In gdisconnect access token is {}'.format(access_token))
print('User name is: ')
print(login_session['username'])
if access_token is None:
print('Access Token is None')
response = make_response(json.dumps('Current user not connected.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
url = 'https://accounts.google.com/o/oauth2/revoke?token={}'.format(login_session['access_token'])
h = httplib2.Http()
result = h.request(url, 'GET')[0]
print('result is ')
print(result)
if result['status'] == '200':
response = make_response(json.dumps('Successfully disconnected.'), 200)
response.headers['Content-Type'] = 'application/json'
return response
else:
response = make_response(json.dumps('Failed to revoke token for given user.', 400))
response.headers['Content-Type'] = 'application/json'
return response
@app.route('/disconnect')
def disconnect():
if 'gplus_id' in login_session:
gdisconnect()
del(login_session['gplus_id'])
del(login_session['credentials'])
elif 'facebook_id' in login_session:
fbdisconnect()
del(login_session['facebook_id'])
del(login_session['access_token'])
del(login_session['username'])
del(login_session['email'])
del(login_session['picture'])
del(login_session['user_id'])
flash("You have successfully been logged out.")
return redirect(url_for('showRestaurants'))
@app.route('/restaurants/<int:restaurant_id>/menu/JSON')
def restaurantMenuJSON(restaurant_id):
items = session.query(MenuItem).filter_by(restaurant_id=restaurant_id).all()
return jsonify(MenuItems=[i.serialize for i in items])
@app.route('/restaurants/<int:restaurant_id>/menu/<int:menu_id>/JSON')
def menuItemJSON(restaurant_id, menu_id):
item = session.query(MenuItem).filter_by(restaurant_id=restaurant_id, id=menu_id).one()
return jsonify(MenuItem=item.serialize)
@app.route('/restaurants/JSON')
def restaurantsJSON():
restaurants = session.query(Restaurant).all()
return jsonify(Restaurants=[r.serialize for r in restaurants])
@app.route('/')
@app.route('/restaurants/')
def showRestaurants():
restaurants = session.query(Restaurant).all()
return render_template('restaurant.html', restaurants=restaurants)
@app.route('/restaurant/new', methods=['GET', 'POST'])
@ensureLogin
def newRestaurant():
if request.method == 'POST':
new_restaurant = Restaurant(name=request.form['name'], user_id=login_session['user_id'])
session.add(new_restaurant)
session.commit()
flash("New restaurant " + new_restaurant.name + " added!")
return redirect(url_for('showRestaurants'))
else:
return render_template('newRestaurant.html')
@app.route('/restaurants/<int:restaurant_id>/edit', methods=['GET', 'POST'])
@ensureLogin
def editRestaurant(restaurant_id):
editedRestaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if ensureOwner(restaurant_id=restaurant_id):
if request.method == 'POST':
# return "Restaurant needs to be edited and a flash message displayed, redirect to restaurants page"
if request.form['name']:
editedRestaurant.name = request.form['name']
session.commit()
flash("Restaurant " + editedRestaurant.name + " edited!")
return redirect(url_for('showRestaurants'))
else:
return render_template('editRestaurant.html', restaurant_id=restaurant_id, restaurant=editedRestaurant)
else:
flash("You are not the owner of this restaurant")
return redirect(url_for('showRestaurants'))
@app.route('/restaurants/<int:restaurant_id>/delete', methods=['GET', 'POST'])
@ensureLogin
def deleteRestaurant(restaurant_id):
deletedRestaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if ensureOwner(restaurant_id=restaurant_id):
if request.method == 'POST':
session.delete(deletedRestaurant)
flash("Restaurant " + deletedRestaurant.name + " deleted!")
return redirect(url_for('showRestaurants'))
else:
return render_template('deleteRestaurant.html', restaurant_id=restaurant_id, restaurant=deletedRestaurant)
else:
flash("You are not the owner of this restaurant")
return redirect(url_for('showRestaurants'))
@app.route('/')
@app.route('/restaurants/<int:restaurant_id>/')
def restaurantMenu(restaurant_id):
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
menu_items = session.query(MenuItem).filter_by(restaurant_id=restaurant.id)
if 'username' not in login_session or not ensureOwner(restaurant_id=restaurant_id):
return render_template("publicmenu.html", restaurant=restaurant, items=menu_items)
else:
return render_template("menu.html", restaurant=restaurant, items=menu_items)
@app.route('/restaurants/<int:restaurant_id>/menuitems/new', methods=['GET', 'POST'])
@ensureLogin
def newMenuItem(restaurant_id):
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if ensureOwner(restaurant_id=restaurant_id):
if request.method == 'POST':
newItem = MenuItem(name=request.form['name'], description=request.form['description'],
price=request.form['price'], course=request.form['course'], restaurant_id=restaurant_id,
user_id=restaurant.user_id)
session.add(newItem)
session.commit()
flash("New menu Item " + newItem.name + " created!")
return redirect(url_for('restaurantMenu', restaurant_id=restaurant_id))
else:
return render_template('newmenuitem.html', restaurant_id=restaurant_id)
else:
flash("You are not the owner of this restaurant")
return redirect(url_for('showRestaurants'))
@app.route('/restaurants/<int:restaurant_id>/menuitems/<int:menu_id>/edit', methods=['GET', 'POST'])
@ensureLogin
def editMenuItem(restaurant_id, menu_id):
editedItem = session.query(MenuItem).filter_by(id=menu_id).one()
if ensureOwner(menu_id=menu_id) or ensureOwner(restaurant_id=restaurant_id):
if request.method == 'POST':
if request.form['name']:
editedItem.name = request.form['name']
if request.form['description']:
editedItem.description = request.form['description']
if request.form['price']:
editedItem.price = request.form['price']
if request.form['course']:
editedItem.course = request.form['course']
session.commit()
flash("Menu item " + editedItem.name + " edited!")
return redirect(url_for('restaurantMenu', restaurant_id=restaurant_id))
else:
# USE THE RENDER_TEMPLATE FUNCTION BELOW TO SEE THE VARIABLES YOU SHOULD USE IN YOUR EDITMENUITEM TEMPLATE
return render_template('editmenuitem.html', restaurant_id=restaurant_id, menu_id=menu_id,
item=editedItem)
else:
flash("You are not the owner of this menu item or restaurant")
return redirect(url_for('showRestaurants'))
@app.route('/restaurants/<int:restaurant_id>/menuitems/<int:menu_id>/delete', methods=['GET', 'POST'])
@ensureLogin
def deleteMenuItem(restaurant_id, menu_id):
deleteItem = session.query(MenuItem).filter_by(id=menu_id).one()
if ensureOwner(restaurant_id=restaurant_id) or ensureOwner(menu_id=menu_id):
if request.method == 'POST':
session.delete(deleteItem)
session.commit()
flash("Menu item " + deleteItem.name + " deleted!")
return redirect(url_for('restaurantMenu', restaurant_id=restaurant_id))
else:
return render_template('deleteMenuItem.html', item=deleteItem)
else:
flash("You are not the owner of this menu item or restaurant")
return redirect(url_for('showRestaurants'))
if __name__ == '__main__':
app.secret_key = 'some_secret_key'
app.debug = True
app.run(host='0.0.0.0', port=5000)