mirror of https://github.com/pallets/flask.git
111 lines
2.8 KiB
Python
111 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Flaskr
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~~~~~~
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A microblog example application written as Flask tutorial with
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Flask and sqlite3.
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:copyright: (c) 2014 by Armin Ronacher.
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:license: BSD, see LICENSE for more details.
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"""
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import os
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from sqlite3 import dbapi2 as sqlite3
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from flask import Flask, request, session, g, redirect, url_for, abort, \
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render_template, flash
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# create our little application :)
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app = Flask(__name__)
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# Load default config and override config from an environment variable
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app.config.update(dict(
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DATABASE=os.path.join(app.root_path, 'flaskr.db'),
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DEBUG=True,
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SECRET_KEY='development key',
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USERNAME='admin',
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PASSWORD='default'
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))
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app.config.from_envvar('FLASKR_SETTINGS', silent=True)
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def connect_db():
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"""Connects to the specific database."""
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rv = sqlite3.connect(app.config['DATABASE'])
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rv.row_factory = sqlite3.Row
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return rv
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def init_db():
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"""Initializes the database."""
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db = get_db()
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with app.open_resource('schema.sql', mode='r') as f:
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db.cursor().executescript(f.read())
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db.commit()
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@app.cli.command('initdb')
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def initdb_command():
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"""Creates the database tables."""
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init_db()
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print('Initialized the database.')
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def get_db():
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"""Opens a new database connection if there is none yet for the
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current application context.
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"""
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if not hasattr(g, 'sqlite_db'):
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g.sqlite_db = connect_db()
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return g.sqlite_db
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@app.teardown_appcontext
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def close_db(error):
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"""Closes the database again at the end of the request."""
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if hasattr(g, 'sqlite_db'):
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g.sqlite_db.close()
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@app.route('/')
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def show_entries():
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db = get_db()
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cur = db.execute('select title, text from entries order by id desc')
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entries = cur.fetchall()
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return render_template('show_entries.html', entries=entries)
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@app.route('/add', methods=['POST'])
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def add_entry():
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if not session.get('logged_in'):
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abort(401)
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db = get_db()
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db.execute('insert into entries (title, text) values (?, ?)',
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[request.form['title'], request.form['text']])
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db.commit()
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flash('New entry was successfully posted')
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return redirect(url_for('show_entries'))
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@app.route('/login', methods=['GET', 'POST'])
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def login():
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error = None
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if request.method == 'POST':
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if request.form['username'] != app.config['USERNAME']:
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error = 'Invalid username'
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elif request.form['password'] != app.config['PASSWORD']:
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error = 'Invalid password'
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else:
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session['logged_in'] = True
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flash('You were logged in')
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return redirect(url_for('show_entries'))
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return render_template('login.html', error=error)
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@app.route('/logout')
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def logout():
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session.pop('logged_in', None)
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flash('You were logged out')
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return redirect(url_for('show_entries'))
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