Revision b657485d

b/snf-django-lib/snf_django/utils/urls.py
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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#
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.conf.urls.defaults import url, patterns
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from snf_django.lib.api.utils import prefix_pattern
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from synnefo.lib.services import get_public_endpoint
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from synnefo.lib import join_urls
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def extend_with_root_redirects(patterns_obj, filled_services, service_type,
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                               base_path):
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    """
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    Append additional redirect url entries for `/` and `/<base_path>` paths.
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    `/` redirects to `/<base_path>` and `/<base_path>` to the resolved service
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    type url.
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    This is used in synnefo components root urlpatterns to append sane default
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    redirects to the chosen service url.
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    """
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    service_url = get_public_endpoint(filled_services, service_type)
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    root_url_entry = url('^$', 'redirect_to',
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                         {'url': join_urls('/', base_path)})
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    base_url_entry = url(prefix_pattern(base_path) + '$', 'redirect_to',
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                         {'url': service_url})
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    # urls order matter. Setting base_url_entry first allows us to avoid
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    # redirect loops when base_path is empty or `/`
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    patterns_obj += patterns('django.views.generic.simple',
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                             base_url_entry, root_url_entry)

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