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app.py
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app.py
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from flask import Flask, render_template, request, make_response, flash, redirect, url_for, session, logging, abort
from flask_sqlalchemy import SQLAlchemy
from wtforms import Form, StringField, TextAreaField, PasswordField, validators
from http import HTTPStatus
import hashlib
import os
import base64
from datetime import datetime
from functools import wraps
app = Flask(__name__)
def authorization_required(view_function):
@wraps(view_function)
def decorated_function(*args, **kwargs):
if 'logged_in' in session:
return view_function(*args, **kwargs)
else:
flash('Authorization required', 'danger')
return redirect(url_for('login'))
return decorated_function
ENV = 'dev'
if ENV == 'dev':
app.debug = True
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://flask:11235813@localhost/flask1'
else:
app.debug = False
app.config['SQLALCHEMY_DATABASE_URI'] = ''
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(200), unique=True, nullable=False)
email = db.Column(db.String(200), unique=True, nullable=False)
username = db.Column(db.String(200), unique=True, nullable=False)
password = db.Column(db.String(200))
ragister_date = db.Column(db.TIMESTAMP(), default=datetime.utcnow)
DIGEST = 'sha384'
ROUNDS = 100000
def __init__(self, **document):
self.name = document['name']
self.username = document['username']
self.email = document['email']
#self.register_date = time.time()
self.password = None
super().__init__(**document)
def set_password(self, password):
salt = os.urandom(30)
# Password-Based Key Derivation Function 2
hash = hashlib.pbkdf2_hmac(
self.DIGEST, password.encode('utf-8'), salt, self.ROUNDS)
self.password = '$'.join(
[self.DIGEST,
base64.urlsafe_b64encode(salt).decode('ascii'),
base64.urlsafe_b64encode(hash).decode('ascii')
]
)
def check_password(self, password):
digest, b64_salt, b64_expected_hash = self.password.split('$')
salt = base64.urlsafe_b64decode(b64_salt)
expected_hash = base64.urlsafe_b64decode(b64_expected_hash)
computed_hash = hashlib.pbkdf2_hmac(
digest, password.encode('utf-8'), salt, self.ROUNDS)
return computed_hash == expected_hash
class Article(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(200), nullable=False)
body = db.Column(db.Text())
created_date = db.Column(db.TIMESTAMP(), default=datetime.utcnow)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'),
nullable=False)
user = db.relationship('User', backref=db.backref('articles', lazy=True))
# db.create_all() # creates tables from models
@app.route('/')
def index():
return render_template('index.html')
@app.route('/about')
def about():
return render_template('about.html')
@app.route('/articles')
def articles():
articles = Article.query.all()
return render_template('articles.html', articles=articles)
@app.route('/articles/<id>/')
def article(id):
try:
id = int(id)
except Exception as ex:
print(ex)
return make_response('Not found', HTTPStatus.NOT_FOUND)
article = Article.query.filter_by(id=id).first()
if not article:
return make_response('Not found', HTTPStatus.NOT_FOUND)
return render_template('article.html', article=article)
class RegisterForm(Form):
name = StringField('Name', [validators.Length(min=1, max=200)])
username = StringField('Username', [validators.Length(min=4, max=200)])
email = StringField('Email', [validators.Regexp(r"^[a-z0-9_-]+@[a-z0-9_-]+\.[a-z]{2,10}$", message="Invalid Email")])
password = PasswordField('Password', [validators.DataRequired()])
confirm = PasswordField('Confirm Password', [validators.EqualTo('password', message="Passwords do not match")])
@app.route('/register', methods=['POST', 'GET'])
def register():
form = RegisterForm(request.form)
if request.method == 'POST' and form.validate():
name = form.name.data
email = form.email.data
username = form.username.data
password = form.password.data
new_user = User(name = name, email=email, username=username)
new_user.set_password(password)
db.session.add(new_user)
db.session.commit()
flash("You are now registered and can log in", 'success')
return redirect(url_for('login'))
# return make_response('OK', HTTPStatus.CREATED)
return render_template('register.html', form=form)
# User login
@app.route('/login', methods=['POST', 'GET'])
def login():
if request.method == 'POST':
username = request.form['username']
#password_candidate = request.form['password']
user = User.query.filter_by(username=username).first()
print(user)
if user and user.check_password(request.form['password']):
#login_user(user)
session['logged_in'] = True
session['username'] = username
app.logger.info('%s logged in successfully', user.username)
return redirect(url_for('dashboard'))
else:
app.logger.info('%s failed to log in', username)
return render_template('login.html', error='Username or password is incorrect')
return render_template('login.html')
@app.route('/dashboard', methods=['GET'])
@authorization_required
def dashboard():
# show dashboard
user = User.query.filter_by(username=session['username']).first()
if not user:
session.clear()
flash("Something bad might have happen", 'danger')
return redirect(url_for('login'))
return render_template('dashboard.html', articles = user.articles)
@app.route('/logout', methods=['GET'])
@authorization_required
def logout():
session.clear()
return redirect(url_for('login'))
class ArticleForm(Form):
title = StringField('Title', [validators.Length(min=1, max=200)])
body = TextAreaField('Body', [validators.Length(min=30)])
@app.route('/add_article', methods=['GET', "POST"])
@authorization_required
def submit():
form = ArticleForm(request.form)
if request.method == 'POST' and form.validate():
title = form.title.data
body = form.body.data
user = User.query.filter_by(username=session['username']).first()
arcticle = Article(title = title, body=body, user=user)
db.session.add(user)
db.session.commit()
return redirect(url_for('article', id=str(arcticle.id)))
return render_template('add_article.html', form=form, endpoint="/add_article")
@app.route('/edit_article/<id>', methods=['GET', "POST"])
@authorization_required
def edit_article(id):
form = ArticleForm(request.form)
try:
id = int(id)
except Exception as ex:
print(ex)
return make_response('Not found', HTTPStatus.BAD_REQUEST)
#return render_template('article.html', article=article)
if request.method == 'POST':
if form.validate():
article = Article.query.filter_by(id=id).update(dict(title=form.title.data, body=form.body.data))
db.session.commit()
return redirect(url_for('article', id=str(id)))
else:
app.logger.info("Failed attempt to update")
return render_template('add_article.html', form=form, endpoint="/edit_article/{id}".format(id=id))
article = Article.query.filter_by(id=id).first()
if not article:
return make_response('Not found', HTTPStatus.NOT_FOUND)
form.title.data = article.title
form.body.data = article.body
endpoint="/edit_article/{id}".format(id=id)
return render_template('add_article.html', form=form, endpoint=endpoint)
@app.route('/delete_article/<id>', methods=["POST"])
@authorization_required
def delete_article(id):
try:
id = int(id)
except Exception as ex:
print(ex)
return make_response('Not found', HTTPStatus.BAD_REQUEST)
#return render_template('article.html', article=article)
if request.method == 'POST':
article = Article.query.filter_by(id=id).delete()
print(article)
if not article:
return make_response("Not found", HTTPStatus.NOT_FOUND)
db.session.commit()
app.logger.info("Article deleted")
flash("Article Deleted", 'success')
return redirect(url_for('dashboard'))
if __name__ == '__main__':
app.secret_key = "seekrit"
app.run(use_reloader=True)