How do I structure this medium sized flask application? - authentication

Question

Using the FLASK framework in Python, my application needs to:
register and log in users (with either a sqlite or postgres database)
access a specific google spreadsheet that the logged in user owns and output that data in a json format.
I am required to have my own authorization & authentication system
I am having a lot of trouble figuring out how to even structure the application - what directories and sub-directories should I have?
I have done A LOT of playing around (about 1 months worth). I am using a virtual environment but don't know how to test my code well either. In general, my code runs but I have no idea how they work together really.** I am completely new to flask.**
Structuring the app:
|app
|----run.py
|----config.py
|----database
|---------database.db
|----app
|---------views.py
|---------models.py
|---------forms.py
|---------extensions.py
|----templates
|---------....
|----static
|--------....
Authorization / Authentication:
I have looked at Flask-Login, Flask-Auth, Flask-Security. I understand the general idea but do not know how to securely implement a complete authorization & authentication system.
app = Flask(__name__)
app.config.from_object(config)
login_manager = LoginManager()
login_manager.init_app(app)
def create_app():
db.init_app()
db.app = app
db.create_all()
return app
#app.route('/')
def index():
#needs to render the homepage template
#app.route('/signup', methods = ['GET', 'POST'])
def register():
form = SignupForm()
if request.method == 'GET':
return render_template('signup.html', form=form)
elif request.method == 'POST':
if form.validate_on_submit():
if User.query.filter_by(email=form.email.data).first():
return "email exists"
else:
newuser = User(form.email.data, form.password.data)
db.session.add(newuser)
db.session.commit()
login_user(newuser)
return "New User created"
else:
return "form didn't validate"
return "Signup"
#app.route('/login', methods = ['GET', 'POST'])
def login():
form = SignupForm()
if request.method == 'GET':
return render_template('login.html', form=form)
elif request.method == 'POST':
if form.validate_on_submit():
user = User.query.filter_by(email=form.email.data).first()
if user:
if user.password == form.password.data:
login_user(user)
return "you are logged in"
else:
return "wrong password"
else:
return "user doesnt exist"
else:
return "form did not validate"
#login_manager.user_loader
def load_user(email):
return User.query.filter_by(email = email).first()
#app.route('/protected')
#login_required
def protected():
return "protected area for logged in users only"
if __name__ == '__main__':
#app.create_app()
app.run(port=5000, host='localhost')`
from flask_security import Security, SQLAlchemyUserDatastore, UserMixin, RoleMixin, login_required
import os
# Create app
app = Flask(__name__)
#app.config['DEBUG'] = True
app.config['SECRET_KEY'] = ''
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////'
app.config['SECURITY_PASSWORD_HASH'] = 'sha512_crypt'
app.config['SECURITY_PASSWORD_SALT'] = str(os.urandom(24))
# Create database connection object
db = SQLAlchemy(app)
# Define models
roles_users = db.Table('roles_users',
db.Column('user_id', db.Integer(), db.ForeignKey('user.id')),
db.Column('role_id', db.Integer(), db.ForeignKey('role.id')))
class Role(db.Model, RoleMixin):
id = db.Column(db.Integer(), primary_key=True)
name = db.Column(db.String(80), unique=True)
description = db.Column(db.String(255))
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
email = db.Column(db.String(255), unique=True)
password = db.Column(db.String(255))
active = db.Column(db.Boolean())
confirmed_at = db.Column(db.DateTime())
roles = db.relationship('Role', secondary=roles_users, backref=db.backref('users', lazy='dynamic'))
user_datastore = SQLAlchemyUserDatastore(db, User, Role)
security = Security(app, user_datastore)
# Create a user to test with
#app.before_first_request
def create_user():
db.create_all()
user_datastore.create_user(email='', password='')
db.session.commit()
#app.route('/')
#login_required
def home():
#password = encrypt_password('mypass')
#print verify_and_update_password('mypass', password)
return "hello"
if __name__ == '__main__':
app.run(debug=True, use_reloader=False)
** I would really appreciate any guidance!**

Answer 1

Project structure:
If you're planning to build a larger Flask application, you should consider decomposing the functionality into Blueprints.
The official Flask documentation has a tutorial on how to structure larger applications:
http://flask.pocoo.org/docs/0.12/patterns/packages/
Also, take a look at the Hitchhiker's guide to organizing your project. It has some very good points: http://python-guide-pt-br.readthedocs.io/en/latest/writing/structure/
If you're designing an REST API consider using Flask-RESTful (which also works nicely with Blueprints)

Answer 2

ya'll, i figured it out & my app is LOOKING GOOD :)I am using blueprints & an application factory pattern.
APP
|_runserver.py
|_/app
|---__init__.py
|---config.py
|---extensions.py
|---forms.py
|---models.py
|---/login_dashboard #blueprint
|------__init__.py
|------views.py
|------/templates
|---------base.html
.
.
|------/static
|-----------/css
.
.
|-----------/js
.
.
|-----------/img
.
.