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server.py
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server.py
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from flask import Flask, Session, render_template, request, redirect, jsonify, url_for, flash, send_from_directory
#from flask.ext.session import Session
#from sqlalchemy import create_engine, asc
#from sqlalchemy.orm import sessionmaker
from flask_sqlalchemy import SQLAlchemy
from database_setup import Category, CategoryItem, User
from flask import session as login_session
import random
import string
from oauth2client.client import flow_from_clientsecrets
from oauth2client.client import FlowExchangeError
import httplib2
import json
from flask import make_response
import requests
import urllib2
from functools import wraps
app = Flask(__name__)
sess = Session()
CLIENT_ID = json.loads(
open('client_secrets.json', 'r').read())['web']['client_id']
APPLICATION_NAME = "Catalog App"
# Connect to Database and create database session
#engine = create_engine('sqlite:///catalog.db')
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///catalog.db'
db = SQLAlchemy(app)
app.secret_key = 'super_secret_key'
#Base.metadata.bind = engine
#DBSession = sessionmaker(bind=engine)
#session = DBSession()
@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 %s" % login_session['state']
return render_template('login.html', STATE=state)
@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
print "access token received %s " % access_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 = 'https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id=%s&client_secret=%s&fb_exchange_token=%s' % (
app_id, app_secret, access_token)
h = httplib2.Http()
result = h.request(url, 'GET')[1]
# Use token to get user info from API
userinfo_url = "https://graph.facebook.com/v2.4/me"
# strip expire tag from access token
token = result.split("&")[0]
url = 'https://graph.facebook.com/v2.4/me?%s&fields=name,id,email' % token
h = httplib2.Http()
result = h.request(url, 'GET')[1]
# print "url sent for API access:%s"% url
# print "API JSON result: %s" % result
data = json.loads(result)
login_session['provider'] = 'facebook'
login_session['username'] = data["name"]
login_session['email'] = data["email"]
login_session['facebook_id'] = data["id"]
# The token must be stored in the login_session in order to properly logout, let's strip out the information before the equals sign in our token
stored_token = token.split("=")[1]
login_session['access_token'] = stored_token
# Get user picture
url = 'https://graph.facebook.com/v2.4/me/picture?%s&redirect=0&height=200&width=200' % token
h = httplib2.Http()
result = h.request(url, 'GET')[1]
data = json.loads(result)
login_session['picture'] = data["data"]["url"]
# see if user exists
user_id = getUserID(login_session['email'])
if not user_id:
user_id = createUser(login_session)
login_session['user_id'] = 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("Now logged in as %s" % login_session['username'])
return output
@app.route('/fbdisconnect')
def fbdisconnect():
facebook_id = login_session['facebook_id']
# The access token must me included to successfully logout
access_token = login_session['access_token']
url = 'https://graph.facebook.com/%s/permissions?access_token=%s' % (facebook_id,access_token)
h = httplib2.Http()
result = h.request(url, 'DELETE')[1]
return "you have been logged out"
@app.route('/gconnect', methods=['POST'])
def gconnect():
# Validate state token
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
# Obtain authorization code
code = request.data
try:
# Upgrade the authorization code into a credentials object
oauth_flow = flow_from_clientsecrets('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()
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'
return response
# 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.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'
return response
# Store the access token in the session for later use.
login_session['access_token'] = credentials.access_token
login_session['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()
login_session['username'] = data['name']
login_session['picture'] = data['picture']
login_session['email'] = data['email']
# ADD PROVIDER TO LOGIN SESSION
login_session['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)
login_session['user_id'] = 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 %s" % login_session['username'])
print "done!"
return output
# User Helper Functions
def createUser(login_session):
newUser = User(name=login_session['username'], email=login_session[
'email'], picture=login_session['picture'])
db.session.add(newUser)
db.session.commit()
user = db.session.query(User).filter_by(email=login_session['email']).one()
return user.id
def getUserInfo(user_id):
user = db.session.query(User).filter_by(id=user_id).one()
return user
def getUserID(email):
try:
user = db.session.query(User).filter_by(email=email).one()
return user.id
except:
return None
def login_required(f):
@wraps(f)
def decorated_function(*args, **kwargs):
if 'username' in login_session:
return f(*args, **kwargs)
else:
flash("You are not allowed to access there")
return redirect('/login')
return decorated_function
@app.route('/gdisconnect')
def gdisconnect():
'''
DISCONNECT - Revoke a current user's token and reset
their login_session
'''
# Only disconnect a connected user.
access_token = login_session.get('access_token')
print(access_token)
if 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=%s' % access_token
h = httplib2.Http()
result = h.request(url, 'GET')[0]
login_session.clear()
return redirect('/catalog')
if result['status'] != '200':
# 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
@app.route('/catalog.json')
def sendCatalogJSON():
'''
Send Catalog Data as JSON
'''
categories = []
for c in db.session.query(Category).order_by(db.asc(Category.id)):
items = db.session.query(CategoryItem).filter_by(category_id=c.id)
category = {
"id": c.id,
"name": c.name,
"items": [i.serialize for i in items]
}
categories.append(category)
return jsonify(Categories=categories)
@app.route('/catalog/<string:item_name>.json')
def sendItemJSON(item_name):
'''
Send Item Data as JSON
'''
item = db.session.query(CategoryItem).filter_by(name=item_name).one()
return jsonify(Item=item.serialize)
@app.route('/')
@app.route('/catalog/')
def showCategories():
'''
Display All Categories (Sidebar) and Latest Items (Main)
Logged In: Add
'''
categories = db.session.query(Category).order_by(db.asc(Category.id))
latest_items = db.session.query(CategoryItem)
return render_template('categories.html', categories=categories, latest_items=latest_items)
@app.route('/catalog/<string:category_name>/items')
def showCategory(category_name):
'''
Display All Categories (Sidebar) and Category Items (Main)
Logged In: Edit, Delete
'''
categories = db.session.query(Category).order_by(db.asc(Category.id))
category = db.session.query(Category).filter_by(name=urllib2.unquote(category_name)).one()
items = db.session.query(CategoryItem).filter_by(category_id=category.id)
return render_template('category_item_list.html',
categories=categories, items=items, category=category)
@app.route('/catalog/<string:category_name>/<string:item_name>')
def showItem(category_name, item_name):
'''
Display title and details about this item
'''
item = db.session.query(CategoryItem).filter_by(name=item_name).one()
return render_template('category.html', item=item)
@app.route('/catalog/<string:item_name>/edit', methods=['GET', 'POST'])
@login_required
def editItem(item_name):
'''
GET: Display Edit Form
POST: Update Item
'''
item = db.session.query(CategoryItem).filter_by(name=urllib2.unquote(item_name)).one()
categories = db.session.query(Category)
if item.user_id != login_session['user_id']:
return """<script>function myFunction() {
alert('You are not authorized to edit this item. Please create your own item in order to edit.');}
</script><body onload='myFunction()''>"""
if request.method == 'POST':
item.name = request.form.get('name', item.name)
item.description = request.form.get('description', item.description)
item.category_id = request.form.get('category_id', item.category_id)
db.session.add(item)
db.session.commit()
category = db.session.query(Category).filter_by(id=item.category_id).one()
return redirect('/catalog/%s/%s' % (category.name, item.name))
else:
return render_template('edit-item.html', item=item, categories=categories)
@app.route('/catalog/<string:item_name>/delete', methods=['GET', 'POST'])
@login_required
def deleteItem(item_name):
'''
GET: Display Delete Confirmation Form
POST: Delete Item
'''
item = db.session.query(CategoryItem).filter_by(name=urllib2.unquote(item_name)).one()
if item.user_id != login_session['user_id']:
return """<script>function myFunction() {
alert('You are not authorized to delete this item. Please create your own item in order to delete.');}
</script><body onload='myFunction()''>"""
if request.method == 'POST':
category = db.session.query(Category).filter_by(id=item.category_id).one()
db.delete(item)
db.session.commit()
return redirect('/catalog/%s/items' % category.name)
else:
return render_template('delete-item.html', item=item)
@app.route('/catalog/add', methods=['GET', 'POST'])
@login_required
def addItem():
'''
GET: Display Add Form
POST: Create New Item
'''
categories = db.session.query(Category)
if request.method == 'POST':
name = request.form.get('name', '')
description = request.form.get('description', '')
category_id = request.form.get('category_id', '')
newItem = CategoryItem(name=name, description=description,
category_id=category_id, user_id=login_session['user_id'])
db.session.add(newItem)
db.session.commit()
return redirect('/catalog/%s/%s' % (newItem.category.name, newItem.name))
else:
return render_template('add-item.html', categories=categories)
if __name__ == '__main__':
app.debug = True
app.run(host='0.0.0.0', port=5000)