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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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import logging
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from urlparse import urlparse
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import urllib
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import urllib2
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from django.http import (
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    HttpResponseNotFound, HttpResponseRedirect, HttpResponseBadRequest,
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    HttpResponse)
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from django.utils.http import urlencode
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from django.views.decorators.csrf import csrf_exempt
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from pithos.api.settings import (
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    AUTHENTICATION_USERS, USER_LOGIN_URL, USER_FEEDBACK_URL, USER_CATALOG_URL)
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from synnefo.lib.pool.http import PooledHTTPConnection
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logger = logging.getLogger(__name__)
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def delegate_to_login_service(request):
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    url = USER_LOGIN_URL
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    users = AUTHENTICATION_USERS
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    if users or not url:
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        return HttpResponseNotFound()
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    p = urlparse(url)
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    if request.is_secure():
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        proto = 'https://'
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    else:
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        proto = 'http://'
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    params = dict([(k, v) for k, v in request.GET.items()])
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    uri = proto + p.netloc + p.path + '?' + urlencode(params)
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    return HttpResponseRedirect(uri)
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def proxy(request, url, headers=None, body=None):
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    p = urlparse(url)
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    kwargs = {}
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    if headers is None:
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        headers = {}
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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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@csrf_exempt
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def delegate_to_feedback_service(request):
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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(
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        request, USER_FEEDBACK_URL, headers=headers, body=request.raw_post_data)
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@csrf_exempt
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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(
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        request, USER_CATALOG_URL, headers=headers, body=request.raw_post_data)