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# Copyright 2011, 2012, 2013 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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import logging
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import urlparse
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from django.http import HttpResponse
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from django.conf import settings
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from synnefo.lib import join_urls
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ASTAKOS_URL = getattr(settings, 'ASTAKOS_URL', None)
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USER_QUOTA_URL = join_urls(ASTAKOS_URL, "astakos/api/quotas")
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RESOURCES_URL = join_urls(ASTAKOS_URL, "astakos/api/resources")
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USER_CATALOG_URL = join_urls(ASTAKOS_URL, "astakos/api/user_catalogs")
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USER_FEEDBACK_URL = join_urls(ASTAKOS_URL, "astakos/api/feedback")
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from objpool.http import PooledHTTPConnection
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logger = logging.getLogger(__name__)
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def proxy(request, url, headers={}, body=None):
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    p = urlparse.urlparse(url)
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    kwargs = {}
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    kwargs['headers'] = headers
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    kwargs['headers'].update(request.META)
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    kwargs['body'] = body
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    kwargs['headers'].setdefault('content-type', 'application/json')
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    kwargs['headers'].setdefault('content-length', len(body) if body else 0)
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    with PooledHTTPConnection(p.netloc, p.scheme) as conn:
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        conn.request(request.method, p.path + '?' + p.query, **kwargs)
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        response = conn.getresponse()
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        length = response.getheader('content-length', None)
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        data = response.read(length)
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        status = int(response.status)
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        return HttpResponse(data, status=status)
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def delegate_to_resources_service(request):
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    logger.debug("Delegate resources request to %s" % RESOURCES_URL)
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    token = request.META.get('HTTP_X_AUTH_TOKEN')
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    headers = {'X-Auth-Token': token}
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    return proxy(request, RESOURCES_URL, headers=headers,
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                 body=request.raw_post_data)
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def delegate_to_user_quota_service(request):
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    logger.debug("Delegate quotas request to %s" % USER_QUOTA_URL)
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    token = request.META.get('HTTP_X_AUTH_TOKEN')
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    headers = {'X-Auth-Token': token}
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    return proxy(request, USER_QUOTA_URL, headers=headers,
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                 body=request.raw_post_data)
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def delegate_to_feedback_service(request):
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    logger.debug("Delegate feedback request to %s" % USER_FEEDBACK_URL)
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    token = request.META.get('HTTP_X_AUTH_TOKEN')
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    headers = {'X-Auth-Token': token}
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    return proxy(request, USER_FEEDBACK_URL, headers=headers,
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                 body=request.raw_post_data)
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def delegate_to_user_catalogs_service(request):
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    token = request.META.get('HTTP_X_AUTH_TOKEN')
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    headers = {'X-Auth-Token': token, 'content-type': 'application/json'}
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    return proxy(request, USER_CATALOG_URL, headers=headers,
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                 body=request.raw_post_data)