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app.py
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app.py
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import hashlib
import os
from flask import Flask, flash, redirect, render_template, request, url_for
from flask_login import (
LoginManager,
current_user,
login_required,
login_user,
logout_user,
)
from flask_wtf.csrf import CSRFProtect
from blueprints import api_blueprint, todo_app_blueprint
from forms import LoginForm, SignupForm
from models import User, db
app = Flask(__name__)
app.config.update(
SECRET_KEY=os.urandom(32),
SQLALCHEMY_TRACK_MODIFICATIONS=False,
SQLALCHEMY_DATABASE_URI="sqlite:///db.sqlite3",
SESSION_COOKIE_SAMESITE="Lax",
)
app.register_blueprint(api_blueprint.api_blueprint)
app.register_blueprint(todo_app_blueprint.todo_app_blueprint)
csrf = CSRFProtect(app)
csrf.exempt(api_blueprint.api_blueprint)
login_manager = LoginManager(app)
login_manager.login_view = "login"
login_manager.login_message_category = "danger"
db.init_app(app)
with app.app_context():
db.create_all()
db.session.commit()
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
@app.route("/")
def index():
if current_user.is_authenticated:
return redirect(url_for("todo_app.todo_app"))
return render_template("index.html")
@app.route("/login", methods=["GET", "POST"])
def login():
if current_user.is_authenticated:
return redirect(url_for("index"))
login_form = LoginForm(request.form)
if request.method == "POST" and login_form.validate():
user = User.query.filter_by(username=login_form.username.data).first()
if user is None:
flash("Username and/or password is incorrect.", "danger")
return redirect(url_for("login"))
if (
hashlib.scrypt(
password=login_form.password.data.encode("UTF-8"),
salt=user.password_salt,
n=32768,
r=8,
p=1,
maxmem=33816576,
)
== user.password_hash
):
login_user(user)
flash("Logged in successfully.", "success")
return redirect(url_for("todo_app.todo_app"))
flash("Username and/or password is incorrect.", "danger")
return render_template("login.html", form=login_form)
@app.route("/signup", methods=["GET", "POST"])
def signup():
if current_user.is_authenticated:
return redirect(url_for("todo_app.todo_app"))
signup_form = SignupForm(request.form)
if request.method == "POST" and signup_form.validate():
if (
User.query.filter_by(username=signup_form.username.data).first()
is not None
):
flash(
"An account with this username already exists. Please try "
"again with a different username.",
"danger",
)
return redirect(url_for("signup"))
new_user_password_salt = os.urandom(32)
new_user_password_hash = hashlib.scrypt(
password=signup_form.password.data.encode("UTF-8"),
salt=new_user_password_salt,
n=32768,
r=8,
p=1,
maxmem=33816576,
)
new_user = User(
username=signup_form.username.data,
password_salt=new_user_password_salt,
password_hash=new_user_password_hash,
)
db.session.add(new_user)
db.session.commit()
login_user(new_user)
flash("Account created successfully.", "success")
return redirect(url_for("todo_app.todo_app"))
return render_template("signup.html", form=signup_form)
@app.route("/logout", methods=["POST"])
@login_required
def logout():
logout_user()
return redirect(url_for("index"))
if __name__ == "__main__":
app.run(debug=True)