forked from udacity/OAuth2.0
/
project.py
374 lines (314 loc) · 14.7 KB
/
project.py
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import httplib2
import json
import random
import requests
import string
from database_setup import Base, MenuItem, Restaurant
from flask import Flask, flash, jsonify, make_response, render_template, request, redirect, url_for
from flask import session as login_session
from oauth2client.client import FlowExchangeError, flow_from_clientsecrets
from sqlalchemy import create_engine, asc
from sqlalchemy.orm import sessionmaker
from constants import FB_APP_ID, FB_PERMISSION_URL, FB_TOKEN_URL, FB_USER_INFO_URL, FB_USER_PIC_URL
from constants import CLIENT_ID, GOOGLE_API_KEY, LOGIN_OUTPUT, SCRIPT_FOR_RESTAURANT
from constants import MESSAGE_LOGIN, MESSAGE_LOGOUT, MESSAGE_NOT_LOGGED
from helpers import create_user, get_fb_token, get_user_id, get_user_info, request_to_url
app = Flask(__name__)
# Connect to Database and create database session
engine = create_engine('sqlite:///restaurantmenu.db')
Base.metadata.bind = engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
# Login
@app.route('/login')
def show_login():
state = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(32))
login_session['state'] = state
return render_template('login.html', google_api_key=GOOGLE_API_KEY, STATE=state, fb_app_id=FB_APP_ID)
# Google POST Request
@app.route('/gconnect', methods=['POST'])
def gconnect():
if request.args.get('state') != login_session['state']:
response = make_response(json.dumps('Invalid state parameter'), 401)
response.headers['Content-Type'] = 'application/json'
return response
code = request.data
try:
# Upgrade the authorization code into a credentials object
oauth_flow = flow_from_clientsecrets('client_secret.json', scope='')
oauth_flow.redirect_uri = 'postmessage'
credentials = oauth_flow.step2_exchange(code)
except FlowExchangeError:
response = make_response(json.dumps('Failed to upgrade the authorization code.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Check that the access token is valid.
access_token = credentials.access_token
url = ('https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=%s' % access_token)
result = request_to_url(url, value=1)
# If there was an error in the access token info, abort.
if result.get('error') is not None:
response = make_response(json.dumps(result.get('error')), 50)
response.headers['Content-Type'] = 'application/json'
# Verify that the access token is used for the intended user.
gplus_id = credentials.id_token['sub']
if result['user_id'] != gplus_id:
response = make_response(json.dumps("Token's user ID doesn't match given user ID."), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Verify that the access token is valid for this app.
if result['issued_to'] != CLIENT_ID:
response = make_response(json.dumps("Token's client ID does not match app's."), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Check to see if 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 gplus_id == stored_gplus_id:
response = make_response(json.dumps('Current user is already connected.'), 200)
response.headers['Content-Type'] = 'application/json'
# Store the access token in the session for later use.
login_session['provider'] = 'google'
login_session['credentials'] = credentials
login_session['gplus_id'] = gplus_id
response = make_response(json.dumps('Successfully connected user.'), 200)
# Get user info
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 = json.loads(answer.text)
login_session['username'] = data['name']
login_session['picture'] = data['picture']
login_session['email'] = data['email']
# See if user exists, if doesn't make a new one
user_id = get_user_id(login_session['email'])
if not user_id:
user_id = create_user(login_session)
login_session['user_id'] = user_id
output = LOGIN_OUTPUT % (login_session['username'], login_session['picture'])
flash(MESSAGE_LOGIN % login_session['username'])
return output
# FB POST Request
@app.route('/fbconnect', methods=['POST'])
def fbconnect():
if request.args.get('state') != login_session['state']:
response = make_response(json.dumps('Invalid state parameter.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
access_token = request.data
# Exchanges client token for long-lived server-side token with /GET /oauth/
# access_token?grant_type=fb_exchange_token&client_id={app-id}&client_secret={app-secret}&fb_exchange_token=
# {short-lived-token}
app_id = json.loads(open('fb_client_secrets.json', 'r').read())['web']['app_id']
app_secret = json.loads(open('fb_client_secrets.json', 'r').read())['web']['app_secret']
url = FB_TOKEN_URL % (app_id, app_secret, access_token)
result = request_to_url(url, value=1, to_json=False)
# Use token to get user info from API and Strip Expire Tag from Access Token
token = get_fb_token(result)
userinfo_url = FB_USER_INFO_URL % token
data = request_to_url(userinfo_url, value=1)
login_session['provider'] = 'facebook'
login_session['username'] = data["name"]
login_session['email'] = data["email"]
login_session['facebook_id'] = data["id"]
# Get user picture
url = FB_USER_PIC_URL % token
data = request_to_url(url, value=1)
login_session['picture'] = data['data']['url']
# See if user exists
user_id = get_user_id(login_session['email'])
if not user_id:
user_id = create_user(login_session)
login_session['user_id'] = user_id
output = LOGIN_OUTPUT % (login_session['username'], login_session['picture'])
flash(MESSAGE_LOGIN % login_session['username'])
return output
# DISCONNECT - Method to logout specific provider
@app.route('/disconnect')
def disconnect():
if 'provider' in login_session:
if login_session['provider'] == 'google':
gdisconnect()
del login_session['gplus_id']
del login_session['credentials']
if login_session['provider'] == 'facebook':
fbdisconnect()
del login_session['facebook_id']
del login_session['username']
del login_session['email']
del login_session['picture']
del login_session['user_id']
del login_session['provider']
flash(MESSAGE_LOGOUT)
return redirect(url_for('show_restaurants'))
else:
flash(MESSAGE_NOT_LOGGED)
return redirect(url_for('show_restaurants'))
# DISCONNECT - Revoke a current user's token and reset their login_session.
@app.route('/gdisconnect')
def gdisconnect():
# Only disconnect a connected user.
credentials = login_session.get('credentials')
if credentials is None:
response = make_response(json.dumps('Current user not connected.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Execute HTTP GET request to revoke current token.
access_token = credentials
url = 'https://accounts.google.com/o/oauth2/revoke?token=%s' % access_token
h = httplib2.Http()
result = h.request(url, 'GET')[0]
if result['status'] == 200:
# Reset the user's session
response = make_response(json.dumps('Succesfully disconnected.'), 200)
response.headers['Content-Type'] = 'application/json'
return response
else:
# For whatever reason, the given token was invalid.
response = make_response(json.dumps('Failed to revoke token for given user.'), 400)
response.headers['Content-Type'] = 'application/json'
return response
# DISCONNECT - Revoke FB current's user token and reset their login_session
@app.route('/fbdisconnect')
def fbdisconnect():
facebook_id = login_session['facebook_id']
url = FB_PERMISSION_URL % facebook_id
result = request_to_url(url, 'DELETE', 1)
# JSON APIs to view Restaurant Information
@app.route('/restaurant/<int:restaurant_id>/menu/JSON')
def restaurantMenuJSON(restaurant_id):
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
items = session.query(MenuItem).filter_by(restaurant_id=restaurant_id).all()
return jsonify(MenuItems=[i.serialize for i in items])
@app.route('/restaurant/<int:restaurant_id>/menu/<int:menu_id>/JSON')
def menuItemJSON(restaurant_id, menu_id):
Menu_Item = session.query(MenuItem).filter_by(id=menu_id).one()
return jsonify(Menu_Item=Menu_Item.serialize)
@app.route('/restaurant/JSON')
def restaurantsJSON():
restaurants = session.query(Restaurant).all()
return jsonify(restaurants=[r.serialize for r in restaurants])
# Show all restaurants
@app.route('/')
@app.route('/restaurant/')
def show_restaurants():
restaurants = session.query(Restaurant).order_by(asc(Restaurant.name))
if 'username' not in login_session:
return render_template('publicrestaurants.html', restaurants=restaurants)
return render_template('restaurants.html', restaurants=restaurants)
# Create a new restaurant
@app.route('/restaurant/new/', methods=['GET', 'POST'])
def new_restaurant():
if 'username' not in login_session:
return redirect('/login')
if request.method == 'POST':
restaurant = Restaurant(name=request.form['name'], user_id=login_session['user_id'])
session.add(restaurant)
flash('New Restaurant %s Successfully Created' % restaurant.name)
session.commit()
return redirect(url_for('show_restaurants'))
else:
return render_template('newRestaurant.html')
# Edit a restaurant
@app.route('/restaurant/<int:restaurant_id>/edit/', methods=['GET', 'POST'])
def edit_restaurant(restaurant_id):
if 'username' not in login_session:
return redirect('/login')
editedRestaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if request.method == 'POST':
if request.form['name']:
editedRestaurant.name = request.form['name']
flash('Restaurant Successfully Edited %s' % editedRestaurant.name)
return redirect(url_for('show_restaurants'))
else:
return render_template('editRestaurant.html', restaurant=editedRestaurant)
# Delete a restaurant
@app.route('/restaurant/<int:restaurant_id>/delete/', methods=['GET', 'POST'])
def delete_restaurant(restaurant_id):
restaurant_to_delete = session.query(Restaurant).filter_by(id=restaurant_id).one()
if 'username' not in login_session:
return redirect('/login')
if restaurant_to_delete.user_id != login_session['user_id']:
return SCRIPT_FOR_RESTAURANT
if request.method == 'POST':
session.delete(restaurant_to_delete)
flash('%s Successfully Deleted' % restaurant_to_delete.name)
session.commit()
return redirect(url_for('show_restaurants', restaurant_id=restaurant_id))
else:
return render_template('deleteRestaurant.html', restaurant=restaurant_to_delete)
# Show a restaurant menu
@app.route('/restaurant/<int:restaurant_id>/')
@app.route('/restaurant/<int:restaurant_id>/menu/')
def show_menu(restaurant_id):
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
creator = get_user_info(restaurant.user_id)
items = session.query(MenuItem).filter_by(restaurant_id=restaurant_id).all()
can_edit = True
if creator is not None and 'username' in login_session:
can_edit = creator.id != login_session['user_id']
if 'username' not in login_session or can_edit:
return render_template('publicmenu.html', items=items, restaurant=restaurant, creator=creator)
else:
return render_template('menu.html', items=items, restaurant=restaurant, creator=creator)
# Create a new menu item
@app.route('/restaurant/<int:restaurant_id>/menu/new/', methods=['GET', 'POST'])
def new_menu_item(restaurant_id):
if 'username' not in login_session:
return redirect('/login')
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
if request.method == 'POST':
new_item = 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(new_item)
session.commit()
flash('New Menu %s Item Successfully Created' % new_item.name)
return redirect(url_for('show_menu', restaurant_id=restaurant_id))
else:
return render_template('newmenuitem.html', restaurant_id=restaurant_id)
# Edit a menu item
@app.route('/restaurant/<int:restaurant_id>/menu/<int:menu_id>/edit', methods=['GET', 'POST'])
def edit_menu_item(restaurant_id, menu_id):
if 'username' not in login_session:
return redirect('/login')
editedItem = session.query(MenuItem).filter_by(id=menu_id).one()
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
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.add(editedItem)
session.commit()
flash('Menu Item Successfully Edited')
return redirect(url_for('show_menu', restaurant_id=restaurant_id))
else:
return render_template('editmenuitem.html', restaurant_id=restaurant_id, menu_id=menu_id, item=editedItem)
# Delete a menu item
@app.route('/restaurant/<int:restaurant_id>/menu/<int:menu_id>/delete', methods=['GET', 'POST'])
def delete_menu_item(restaurant_id, menu_id):
if 'username' not in login_session:
return redirect('/login')
restaurant = session.query(Restaurant).filter_by(id=restaurant_id).one()
itemToDelete = session.query(MenuItem).filter_by(id=menu_id).one()
if request.method == 'POST':
session.delete(itemToDelete)
session.commit()
flash('Menu Item Successfully Deleted')
return redirect(url_for('show_menu', restaurant_id=restaurant_id))
else:
return render_template('deletemenuitem.html', item=itemToDelete)
if __name__ == '__main__':
app.secret_key = 'super_secret_key'
app.debug = True
app.run(host='0.0.0.0', port=5040)