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__init__.py
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__init__.py
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from flask import Flask, render_template, request, redirect, jsonify, url_for
from sqlalchemy import create_engine, asc
from sqlalchemy.orm import sessionmaker, scoped_session
from database_setup import Base, Category, Item, User
from db_helper import getUserID, createUser, getUserInfo
from flask import session as login_session_2
import random
import string
# Import for GConnect
from flask import make_response, flash
from oauth2client.client import flow_from_clientsecrets
from oauth2client.client import FlowExchangeError
import httplib2
import json
import requests
# Import for Login Required Decorator
from functools import wraps
from flask import g
def login_required(f):
@wraps(f)
def decorated_function(*args, **kwargs):
if 'username' not in login_session_2:
flash("You are not signed in. Sign in to access")
return redirect(url_for('showLogin'))
return f(*args, **kwargs)
return decorated_function
# Initialize the database to work with and bind it to Base
engine = create_engine('postgresql://catalog:udacity@localhost/catalog')
Base.metadata.bind = engine
# Create a new session to access and update the database
session = scoped_session(sessionmaker(bind=engine))
app = Flask(__name__)
@app.after_request
def remove_session(response):
session.remove()
return response
# Save for later use
CLIENT_ID = "813346898687-jp8fq0jq0dqob51os7hs9m3787vugg92.apps.googleusercontent.com"
@app.route('/')
@app.route('/catalog')
def catalogHome():
"""Shows home page with all categories and 10 latest items."""
categories = session.query(Category).all()
items = session.query(Item).order_by(Item.id.desc()).limit(10).all()
# Check if user logged in to display public or restricted home page
if 'username' not in login_session_2:
return render_template('publicHome2.html',
categories=categories, items=items)
else:
return render_template('home2.html',
categories=categories, items=items)
@app.route('/login')
def showLogin():
"""Creates antiforgery session token and sets it to state."""
state = ''.join(random.choice(string.ascii_uppercase +
string.digits) for x in xrange(32))
login_session_2['state'] = state
return render_template('login.html', STATE=state)
@app.route('/gconnect', methods=['POST'])
def gconnect():
"""Connects to Google + using hybrid authentication flow."""
# Validate state token
if request.args.get('state') != login_session_2['state']:
response = make_response(json.dumps('Invalid state parameter.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Obtain authorization code
code = request.data
# Upgrade the authorization code into a credentials object
try:
oauth_flow = flow_from_clientsecrets('/var/www/catalog/catalog/client_secrets.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)
h = httplib2.Http()
# Create JSON get request
result = json.loads(h.request(url, 'GET')[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')), 500)
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)
print "Token's client ID does not match app's."
response.headers['Content-Type'] = 'application/json'
return response
stored_credentials = login_session_2.get('credentials')
stored_gplus_id = login_session_2.get('gplus_id')
# Check if user is connected
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'
return response
# Store the access token in the session for later use.
login_session_2['credentials'] = credentials.to_json()
login_session_2['gplus_id'] = gplus_id
# 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 = answer.json()
# Set user info to login_session_2
login_session_2['username'] = data['name']
login_session_2['picture'] = data['picture']
login_session_2['email'] = data['email']
# ADD PROVIDER TO LOGIN SESSION
login_session_2['provider'] = 'google'
# see if user exists, if it doesn't make a new one
user_id = getUserID(data["email"])
if not user_id:
user_id = createUser(login_session_2)
login_session_2['user_id'] = user_id
output = ''
output += '<h1>Welcome, '
output += login_session_2['username']
output += '!</h1>'
output += '<img src="'
output += login_session_2['picture']
output += ' " style = "width: 300px; height: 300px;border-radius: 150px;'
output += '-webkit-border-radius: 150px;-moz-border-radius: 150px;"> '
flash("you are now logged in as %s" % login_session_2['username'])
print "done!"
return output
@app.route('/gdisconnect')
def gdisconnect():
"""Disconnects and logs out current Google + user."""
# Only disconnect a connected user.
credentials = login_session_2.get('credentials')
# Check if connected
if credentials is None:
response = make_response(
json.dumps('Current user not connected.'), 401)
response.headers['Content-Type'] = 'application/json'
return response
# Get access_token
access_token = json.loads(credentials)['token_response']['access_token']
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':
# Check if failed to revoke token
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():
"""Disconnect method."""
# Delete session if logged in
if 'provider' in login_session_2:
if login_session_2['provider'] == 'google':
gdisconnect()
del login_session_2['gplus_id']
del login_session_2['credentials']
del login_session_2['username']
del login_session_2['email']
del login_session_2['picture']
del login_session_2['user_id']
del login_session_2['provider']
flash("You have successfully been logged out.")
return redirect(url_for('catalogHome'))
else:
flash("You were not logged in")
return redirect(url_for('catalogHome'))
@app.route('/catalog/new', methods=["GET", "POST"])
@login_required
def newCategory():
"""Creates a new category in the database."""
# Check if POST method and add new category
if request.method == 'POST':
newCategory = Category(name=request.form['name'],
user_id=login_session_2['user_id'])
session.add(newCategory)
session.commit()
flash('New Category %s Successfully Created' % newCategory.name)
return redirect(url_for('catalogHome'))
else:
return render_template('newCategoryPage.html')
@app.route('/catalog/<int:category_id>/<category_name>/items')
def showCategoryItems(category_id, category_name):
"""Shows a category's items in the database."""
categories = session.query(Category).all()
items = session.query(Item).filter_by(category_id=category_id).all()
# Check if logged in
if 'username' not in login_session_2:
return render_template('publicShowCategoryItemsPage.html',
categories=categories, category_id=category_id,
category_name=category_name.title(),
items=items)
else:
return render_template('showCategoryItemsPage.html',
categories=categories, category_id=category_id,
category_name=category_name.title(),
items=items)
@app.route('/catalog/<int:category_id>/<category_name>/edit',
methods=["GET", "POST"])
@login_required
def editCategory(category_id, category_name):
"""Edits a category in the database."""
categoryToEdit = session.query(Category).filter_by(id=category_id).one()
# Check if user is user that created category
if categoryToEdit.user_id != login_session_2['user_id']:
return "<script>function myFunction() {alert(\
'You are not authorized to edit this category.'\
);}</script><body onload='myFunction()''>"
# Check if method is POST and edit category name
if request.method == 'POST':
editCat = session.query(Category).filter_by(id=category_id).one()
editCat.name = request.form['name']
session.add(editCat)
session.commit()
flash("The category has been edited")
return redirect(url_for('catalogHome'))
return render_template('editCategoryPage.html',
category_id=category_id,
category_name=category_name)
@app.route('/catalog/<int:category_id>/<category_name>/delete',
methods=["GET", "POST"])
@login_required
def deleteCategory(category_id, category_name):
"""Deletes a category and all its items in the database."""
categoryToDelete = session.query(Category).filter_by(id=category_id).one()
# Check if user is user that created category
if categoryToDelete.user_id != login_session_2['user_id']:
return "<script>function myFunction() {alert(\
'You are not authorized to delete this category.'\
);}</script><body onload='myFunction()''>"
# Check if method is POST and delete category
if request.method == 'POST':
items = session.query(Item).filter_by(category_id=category_id).all()
for item in items:
session.delete(item)
category = session.query(Category).filter_by(id=category_id).one()
session.delete(category)
session.commit()
flash("The category has been deleted")
return redirect(url_for('catalogHome'))
else:
return render_template('deleteCategoryPage.html',
category_id=category_id,
category_name=category_name)
@app.route('/catalog/<int:category_id>/<category_name>/new',
methods=["GET", "POST"])
@login_required
def newItem(category_id, category_name):
"""Creates a new items in the database."""
categoryForItem = session.query(Category).filter_by(id=category_id).one()
# Check if user is user that created category
if categoryForItem.user_id != login_session_2['user_id']:
return "<script>function myFunction() {alert(\
'You are not authorized to create an item in this category.'\
);}</script><body onload='myFunction()''>"
categories = session.query(Category).all()
# Check if method is POST and add new item
if request.method == 'POST':
newItem = Item(name=request.form['name'],
description=request.form['description'],
category_id=category_id)
session.add(newItem)
session.commit()
flash("The item has been added")
return redirect(url_for('showCategoryItems', category_id=category_id,
category_name=category_name))
else:
return render_template('newItemPage.html',
category_id=category_id,
category_name=category_name)
@app.route(
'/catalog/<int:category_id>/<category_name>/<int:item_id>/<item_name>')
def showItem(category_id, category_name, item_id, item_name):
"""Shows an items in the database."""
item = session.query(Item).filter_by(id=item_id).one()
# Check if logged in
if 'username' not in login_session_2:
return render_template('publicShowItemPage.html',
category_id=category_id,
category_name=category_name, item_id=item_id,
item_name=item_name, item=item)
else:
return render_template('showItemPage.html', category_id=category_id,
category_name=category_name, item_id=item_id,
item_name=item_name, item=item)
@app.route('/catalog/<int:category_id>/<category_name>/<int:item_id>/edit',
methods=["GET", "POST"])
@login_required
def editItem(category_id, category_name, item_id):
"""Edits an item in the database."""
categoryForItem = session.query(Category).filter_by(id=category_id).one()
# Check if user is user that created category
if categoryForItem.user_id != login_session_2['user_id']:
return "<script>function myFunction() {alert(\
'You are not authorized to edit an item in this category.'\
);}</script><body onload='myFunction()''>"
categories = session.query(Category).all()
item = session.query(Item).filter_by(id=item_id).one()
# Check if method is POST and edit item
if request.method == 'POST':
item.name = request.form['name']
item.description = request.form['description']
item.category_id = request.form['category_id']
print request.form['category_id'] + "-----"
session.add(item)
session.commit()
flash("The item has been edited")
return redirect(url_for('showItem',
category_id=category_id, category_name=category_name,
item_id=item.id, item_name=item.name))
else:
return render_template('editItemPage.html',
category_id=category_id,
category_name=category_name, item_id=item_id,
item=item, categories=categories)
@app.route('/catalog/<int:category_id>/<category_name>/<int:item_id>/delete',
methods=["GET", "POST"])
@login_required
def deleteItem(category_id, category_name, item_id):
"""Deletes an item in the database."""
categoryForItem = session.query(Category).filter_by(id=category_id).one()
# Check if user is user that created category
if categoryForItem.user_id != login_session_2['user_id']:
return "<script>function myFunction() {alert(\
'You are not authorized to delete an item in this category.'\
);}</script><body onload='myFunction()''>"
# Check if method is POST and delete item
if request.method == 'POST':
item = session.query(Item).filter_by(id=item_id).one()
session.delete(item)
session.commit()
flash("The item has been deleted")
return redirect(url_for('showCategoryItems', category_id=category_id,
category_name=category_name))
else:
return render_template('deleteItemPage.html', category_id=category_id,
category_name=category_name, item_id=item_id)
@app.route('/catalog/json')
def catalogJSON():
"""Provides JSON for all categories in the database."""
categories = session.query(Category).all()
return jsonify(categories=[c.serialize for c in categories])
@app.route('/catalog/<int:category_id>/<category_name>/json')
def categoryJSON(category_id, category_name):
"""Provides JSON for all items in a category in the database."""
items = session.query(Item).filter_by(category_id=category_id).all()
return jsonify(items_in_category=[i.serialize for i in items])
@app.route('/catalog/<int:category_id>/<category_name>/<int:item_id>/\
<item_name>/json')
def itemJSON(category_id, category_name, item_id, item_name):
"""Provides JSON for an item in a category in the database."""
item = session.query(Item).filter_by(id=item_id).one()
return jsonify(item=[item.serialize])
if __name__ == '__main__':
"""Checks if it is called and sets the port."""
app.secret_key = 'super_secret_key'
# app.debug = True
app.run()