55 lines
2.3 KiB
Python
55 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Flask License
|
|
#
|
|
# Copyright © 2010 by the Pallets team.
|
|
#
|
|
# Some rights reserved.
|
|
|
|
# Redistribution and use in source and binary forms of the software as well as
|
|
# documentation, with or without modification, are permitted provided that the
|
|
# following conditions are met:
|
|
#
|
|
# Redistributions of source code must retain the above copyright notice, this list of conditions
|
|
# and the following disclaimer.
|
|
# Redistributions in binary form must reproduce the above copyright notice, this list of conditions
|
|
# and the following disclaimer in the documentation and/or other materials provided with the distribution.
|
|
# Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products
|
|
# derived from this software without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR
|
|
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE AND DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
# http://flask.pocoo.org/snippets/62/
|
|
|
|
from urllib.parse import urlparse, urljoin
|
|
|
|
|
|
from flask import request, url_for, redirect
|
|
|
|
|
|
def is_safe_url(target):
|
|
ref_url = urlparse(request.host_url)
|
|
test_url = urlparse(urljoin(request.host_url, target))
|
|
return test_url.scheme in ('http', 'https') and ref_url.netloc == test_url.netloc
|
|
|
|
|
|
def get_redirect_target():
|
|
for target in request.values.get('next'), request.referrer:
|
|
if not target:
|
|
continue
|
|
if is_safe_url(target):
|
|
return target
|
|
|
|
|
|
def redirect_back(endpoint, **values):
|
|
target = request.form['next']
|
|
if not target or not is_safe_url(target):
|
|
target = url_for(endpoint, **values)
|
|
return redirect(target)
|