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