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app.py
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app.py
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from flask import Flask
from flask import request, make_response
from flask.json import jsonify
from flask_restful import Api, Resource
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
from flask_httpauth import HTTPTokenAuth
from flask_cors import CORS
from itsdangerous import TimedJSONWebSignatureSerializer as JsonWebToken
import os
import bcrypt
basedir = os.path.abspath(os.path.join(os.path.dirname(__file__)))
SQLALCHEMY_DATABASE_URI = "sqlite:///" + os.path.join(basedir,"test.db")
db = SQLAlchemy()
jwt = JsonWebToken("secretToken!", expires_in=3600)
auth = HTTPTokenAuth("Bearer")
INVALID_INPUT_422 = ({"message": "Invalid input."}, 400)
INVALID_CREDENTIALS__422 = ({"message": "Invalid credentials."}, 401)
USER_ALREADY_EXIST = ({"message": "User already exist"}, 400)
USER_NOT_EXIST = ({"message": "User not exist"}, 401)
ERROR_ON_HANDLING = ({"message" : "Error on handling"}, 401)
REGISTRATION_SUCCESSFUL = ({"message" : "Registration Successful"}, 201)
LOGOUT_SUCCESSFUL = ({"message" : "Logout Successful"}, 200)
class User(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
name = db.Column(db.String(length=80))
username = db.Column(db.String(length=80))
password = db.Column(db.LargeBinary(length=60), nullable=False)
email = db.Column(db.String(length=80), unique=True, nullable=False)
pincode = db.Column(db.Integer)
address = db.Column(db.String(length=120))
phoneNumber = db.Column(db.Integer)
created = db.Column(db.DateTime, nullable=False)
def generate_auth_token(self):
return jwt.dumps({"email" : self.email})
@staticmethod
@auth.verify_token
def verify_auth_token(token):
try:
data = jwt.loads(token)
except:
return False
if (Blacklist.check_blacklist(token)):
return False
if "email" in data:
return True
return False
def __repr__(self):
return "<User(id='%s', name='%s', username='%s', password='%s', email='%s', pincode='%s', address='%s', phoneNumber='%s', created='%s')" % (
self.id,
self.name,
self.username,
self.password,
self.email,
self.pincode,
self.address,
self.phoneNumber,
self.created
)
class Blacklist(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
token = db.Column(db.String(500), unique=True, nullable=False)
blackisted_on = db.Column(db.DateTime, nullable=False)
@staticmethod
def check_blacklist(auth_token):
# check whether auth token has been blacklisted
res = Blacklist.query.filter_by(token= auth_token).first()
if res:
return True
else:
return False
def __repr__(self):
return "<User(id='%s', status='invalidated.')>" % (
self.id,
self.refresh_token,
)
class Index(Resource):
@staticmethod
def get():
return "Hello World"
class Register(Resource):
@staticmethod
def post():
name = request.json.get("name").strip()
username = request.json.get("username").strip()
unhashedPassword = request.json.get("password").strip()
email = request.json.get("email").strip()
phoneNumber = request.json.get("phoneNumber")
pincode = request.json.get("pincode")
address = request.json.get("address")
if name is None or username is None or unhashedPassword is None or email is None or phoneNumber is None or pincode is None or address is None:
return INVALID_INPUT_422
password = bcrypt.hashpw(unhashedPassword.strip().encode("utf-8"), bcrypt.gensalt())
user = User.query.filter_by(email=email).first()
if not user:
user = User(name=name, username=username, password=password, email=email, phoneNumber=phoneNumber, pincode=pincode, address=address, created=datetime.utcnow())
db.session.add(user)
db.session.commit()
return make_response(REGISTRATION_SUCCESSFUL)
else:
return make_response(USER_ALREADY_EXIST)
class Login(Resource):
@staticmethod
def post():
userIdentity = request.json.get("userIdentity").strip()
password = request.json.get("password").strip()
if userIdentity is None or password is None:
return INVALID_INPUT_422
user = User.query.filter_by(username = userIdentity).first()
if user is None:
user = User.query.filter_by(email = userIdentity).first()
if user is None:
return USER_NOT_EXIST
isPasswordMatched = bcrypt.checkpw(password.encode("utf-8"), user.password)
if not isPasswordMatched:
return INVALID_CREDENTIALS__422
access_token = user.generate_auth_token()
responseObject = {
"token": access_token.decode(),
}
return make_response(jsonify(responseObject))
class Logout(Resource):
@staticmethod
@auth.login_required
def post():
# get auth token
auth_token = request.json.get("token")
blacklist_token = Blacklist(token=auth_token, blackisted_on=datetime.utcnow())
try:
# insert the token
db.session.add(blacklist_token)
db.session.commit()
return make_response(LOGOUT_SUCCESSFUL)
except Exception as e:
return make_response(ERROR_ON_HANDLING)
def generate_routes(app):
# Create api.
api = Api(app)
# Add all routes resources.
# Index page.
api.add_resource(Index, "/")
# Register page.
api.add_resource(Register, "/v1/auth/register")
# Login page.
api.add_resource(Login, "/v1/auth/login")
# Logout page.
api.add_resource(Logout, "/v1/auth/logout")
def create_app():
# Create a flask app.
app = Flask(__name__)
# Set debug true for catching the errors.
app.config['DEBUG'] = True
# Set database url.
app.config['SQLALCHEMY_DATABASE_URI'] = SQLALCHEMY_DATABASE_URI
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
# Generate routes.
generate_routes(app)
# Database initialize with app.
db.init_app(app)
# Check if there is no database.
if not os.path.exists(SQLALCHEMY_DATABASE_URI):
# New db app if no database.
db.app = app
# Create all database tables.
db.create_all()
CORS(app)
return app
if __name__ == '__main__':
# Create app.
app = create_app()
# Run app. For production use another web server.
# Set debug and use_reloader parameters as False.
app.run(port=5000, debug=True, host='localhost', use_reloader=True)