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# -*- coding: utf-8 -*-
A microblog example application written as Flask tutorial with
Flask and sqlite3.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
from __future__ import with_statement
from sqlite3 import dbapi2 as sqlite3
from flask import Flask, request, session, g, redirect, url_for, abort, \
render_template, flash, _app_ctx_stack
# configuration
DATABASE = '/tmp/flaskr.db'
DEBUG = True
SECRET_KEY = 'development key'
USERNAME = 'admin'
PASSWORD = 'default'
# create our little application :)
app = Flask(__name__)
app.config.from_envvar('FLASKR_SETTINGS', silent=True)
def init_db():
"""Creates the database tables."""
with app.app_context():
db = get_db()
with app.open_resource('schema.sql') as f:
def get_db():
"""Opens a new database connection if there is none yet for the
current application context.
top =
if not hasattr(top, 'sqlite_db'):
sqlite_db = sqlite3.connect(app.config['DATABASE'])
sqlite_db.row_factory = sqlite3.Row
top.sqlite_db = sqlite_db
return top.sqlite_db
def close_db_connection(exception):
"""Closes the database again at the end of the request."""
top =
if hasattr(top, 'sqlite_db'):
def show_entries():
db = get_db()
cur = db.execute('select title, text from entries order by id desc')
entries = cur.fetchall()
return render_template('show_entries.html', entries=entries)
@app.route('/add', methods=['POST'])
def add_entry():
if not session.get('logged_in'):
db = get_db()
db.execute('insert into entries (title, text) values (?, ?)',
[request.form['title'], request.form['text']])
flash('New entry was successfully posted')
return redirect(url_for('show_entries'))
@app.route('/login', methods=['GET', 'POST'])
def login():
error = None
if request.method == 'POST':
if request.form['username'] != app.config['USERNAME']:
error = 'Invalid username'
elif request.form['password'] != app.config['PASSWORD']:
error = 'Invalid password'
session['logged_in'] = True
flash('You were logged in')
return redirect(url_for('show_entries'))
return render_template('login.html', error=error)
def logout():
session.pop('logged_in', None)
flash('You were logged out')
return redirect(url_for('show_entries'))
if __name__ == '__main__':
Something went wrong with that request. Please try again.