def register():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
db = get_db()
error = None
if not username:
error = 'Username is required.'
elif not password:
error = 'Password is required.'
else:
cur = db.cursor()
cur.execute('SELECT id FROM user WHERE username = %s',
(username, ))
rv = cur.fetchone()
cur.close()
if rv is not None:
error = 'User {} is already registered.'.format(username)
if error is None:
db = get_db()
cur = db.cursor()
cur.execute('INSERT INTO user (username, password) VALUES(%s,%s)',
(username, generate_password_hash(password)))
db.commit()
cur.close()
return redirect(url_for('auth.login'))
flash(error)
return render_template('auth/register.html')
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
db = get_db()
error = None
cur = db.cursor(pymysql.cursors.DictCursor)
cur.execute(
'SELECT id, username,password FROM user WHERE username = %s',
(username, ))
user = cur.fetchone()
cur.close()
if user is None:
error = 'Incorrect username.'
elif not check_password_hash(user['password'], password):
error = 'Incorrect password.'
if error is None:
session.clear()
session['user_id'] = user['id']
return redirect(url_for('index'))
flash(error)
return render_template('auth/login.html')
def delete(id):
get_post(id)
db = get_db()
cur = db.cursor()
cur.execute('DELETE FROM post WHERE id = %s', (id, ))
db.commit()
cur.close()
return redirect(url_for('blog.index'))
def index():
db = get_db()
cur = db.cursor(pymysql.cursors.DictCursor)
cur.execute('SELECT p.id, title, body, created, author_id, username'
' FROM post p JOIN user u ON p.author_id = u.id'
' ORDER BY created DESC')
posts = cur.fetchall()
cur.close()
return render_template('blog/index.html', posts=posts)
def load_logged_in_user():
user_id = session.get('user_id')
print('user_id = ' + str(user_id))
if user_id is None:
g.user = None
else:
db = get_db()
cur = db.cursor(pymysql.cursors.DictCursor)
cur.execute('SELECT * FROM user WHERE id = %s', (user_id, ))
g.user = cur.fetchone()
cur.close()
def get_post(id, check_author=True):
db = get_db()
cur = db.cursor(pymysql.cursors.DictCursor)
cur.execute(
'SELECT p.id, title, body, created, author_id, username'
' FROM post p JOIN user u ON p.author_id = u.id'
' WHERE p.id = %s', (id, ))
post = cur.fetchone()
cur.close()
if post is None:
abort(404, "Post id {0} doesn't exist.".format(id))
if check_author and post['author_id'] != g.user['id']:
abort(403)
return post
def create():
if request.method == 'POST':
title = request.form['title']
body = request.form['body']
error = None
if not title:
error = 'Title is required.'
if error is not None:
flash(error)
else:
db = get_db()
cur = db.cursor()
cur.execute(
'INSERT INTO post (title, body, author_id) VALUES (%s,%s,%s)',
(title, body, g.user['id']))
db.commit()
cur.close()
return redirect(url_for('blog.index'))
return render_template('blog/create.html')
def update():
post = get_post(id)
if request.method == 'POST':
title = request.form['title']
body = request.form['body']
error = None
if not title:
error = 'Title is required.'
if error is not None:
flash(error)
else:
db = get_db()
cur = db.cursor()
cur.execute(
'UPDATE post SET title = %s, body = %s'
' WHERE id = %s', (title, body, id))
db.commit()
cur.close()
return redirect(url_for('blog.index'))
return render_template('blog/update.html', post=post)