Created
July 13, 2012 06:15
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Simple login system with Flask-Sijax
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| *.pyc | |
| env | |
| static/js |
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| from werkzeug.datastructures import CallbackDict | |
| from flask.sessions import SessionInterface, SessionMixin | |
| from itsdangerous import URLSafeTimedSerializer, BadSignature | |
| class ItsdangerousSession(CallbackDict, SessionMixin): | |
| def __init__(self, initial=None): | |
| def on_update(self): | |
| self.modified = True | |
| CallbackDict.__init__(self, initial, on_update) | |
| self.modified = False | |
| class ItsdangerousSessionInterface(SessionInterface): | |
| salt = 'cookie-session' | |
| session_class = ItsdangerousSession | |
| def get_serializer(self, app): | |
| if not app.secret_key: | |
| return None | |
| return URLSafeTimedSerializer(app.secret_key, | |
| salt=self.salt) | |
| def open_session(self, app, request): | |
| s = self.get_serializer(app) | |
| if s is None: | |
| return None | |
| val = request.cookies.get(app.session_cookie_name) | |
| if not val: | |
| return self.session_class() | |
| max_age = app.permanent_session_lifetime.total_seconds() | |
| try: | |
| data = s.loads(val, max_age=max_age) | |
| return self.session_class(data) | |
| except BadSignature: | |
| return self.session_class() | |
| def save_session(self, app, session, response): | |
| domain = self.get_cookie_domain(app) | |
| if not session: | |
| if session.modified: | |
| response.delete_cookie(app.session_cookie_name, | |
| domain=domain) | |
| return | |
| expires = self.get_expiration_time(app, session) | |
| val = self.get_serializer(app).dumps(dict(session)) | |
| response.set_cookie(app.session_cookie_name, val, | |
| expires=expires, httponly=True, | |
| domain=domain) |
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| <html> | |
| <head> | |
| <script type="text/javascript" | |
| src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> | |
| <script type="text/javascript" src="/static/js/sijax/sijax.js"></script> | |
| <script type="text/javascript"> | |
| {{ g.sijax.get_js()|safe }} | |
| </script> | |
| </head> | |
| <body> | |
| {% if user_id is not none %} | |
| You are currently logged in as {{ user_id }} | |
| <a href="javascript://" onclick="Sijax.request('logout');"> | |
| Logout | |
| </a> | |
| {% else %} | |
| <a href="javascript://" onclick="Sijax.request('login');"> | |
| Login | |
| </a> | |
| {% endif %} | |
| </body> | |
| </html> |
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| flask-sijax | |
| itsdangerous |
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| # -*- coding: utf-8 -*- | |
| import os, sys | |
| path = os.path.join('.', os.path.dirname(__file__), '../') | |
| sys.path.append(path) | |
| from flask import Flask, g, render_template, session, url_for | |
| from itis import ItsdangerousSessionInterface | |
| import flask_sijax | |
| app = Flask(__name__) | |
| app.secret_key = 'very secret key here' | |
| app.config["SIJAX_STATIC_PATH"] = os.path.join('.', os.path.dirname(__file__), 'static/js/sijax/') | |
| app.config["SIJAX_JSON_URI"] = '/static/js/sijax/json2.js' | |
| flask_sijax.Sijax(app) | |
| app.session_interface = ItsdangerousSessionInterface() | |
| @flask_sijax.route(app, "/") | |
| def home(): | |
| def login(obj_response): | |
| session['user_id'] = 'some_username' | |
| obj_response.redirect(url_for('home')) | |
| def logout(obj_response): | |
| del session['user_id'] | |
| obj_response.redirect(url_for('home')) | |
| if g.sijax.is_sijax_request: | |
| g.sijax.register_callback('login', login) | |
| g.sijax.register_callback('logout', logout) | |
| return g.sijax.process_request() | |
| return render_template('login.html', user_id=session.get('user_id', None)) | |
| if __name__ == '__main__': | |
| app.run(debug=True, port=5555) |
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