Synnefo

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import astakos.oa2.models as oa2_models

from astakos.oa2.backends import base as oa2base

from astakos.oa2.backends import base as errors

from django import http

from django.conf import settings

from django.core.exceptions import ValidationError

from django.core.validators import URLValidator

from django.core.urlresolvers import reverse

from django.conf.urls.defaults import patterns, url

from django.http import HttpResponseNotAllowed

from django.views.decorators.csrf import csrf_exempt

from synnefo.lib import join_urls

import logging

logger = logging.getLogger(__name__)

class DjangoViewsMixin(object):

    def auth_view(self, request):

        oa2request = self.build_request(request)

        oa2response = self.authorize(oa2request, accept=False)

        return self._build_response(oa2response)

    @csrf_exempt

    def token_view(self, request):

        if request.method != 'POST':

            return HttpResponseNotAllowed(['POST'])

        oa2request = self.build_request(request)

        oa2response = self.grant_token(oa2request)

        return self._build_response(oa2response)

class DjangoBackendORMMixin(object):

    def get_client_by_credentials(self, username, password):

        try:

            return oa2_models.Client.objects.get(identifier=username,

                                                 secret=password)

        except oa2_models.Client.DoesNotExist:

            raise errors.InvalidClientID("No such client found")

    def get_client_by_id(self, clientid):

        try:

            return oa2_models.Client.objects.get(identifier=clientid)

        except oa2_models.Client.DoesNotExist:

            raise errors.InvalidClientID("No such client found")

    def get_authorization_code(self, code):

        try:

            return oa2_models.AuthorizationCode.objects.get(code=code)

        except oa2_models.AuthorizationCode.DoesNotExist:

            raise errors.OA2Error("No such authorization code")

    def get_token(self, token):

        try:

            return oa2_models.Token.objects.get(code=token)

        except oa2_models.Token.DoesNotExist:

            raise errors.OA2Error("No such token")

    def delete_authorization_code(self, code):

        code.delete()

        logger.info(u'%r deleted' % code)

    def delete_token(self, token):

        token.delete()

        logger.info(u'%r deleted' % token)

    def check_credentials(self, client, username, secret):

        if not (username == client.get_id() and secret == client.secret):

            raise errors.InvalidAuthorizationRequest("Invalid credentials")

class DjangoBackend(DjangoBackendORMMixin, oa2base.SimpleBackend,

                    DjangoViewsMixin):

    code_model = oa2_models.AuthorizationCode.objects

    token_model = oa2_models.Token.objects

    client_model = oa2_models.Client.objects

    def _build_response(self, oa2response):

        response = http.HttpResponse()

        response.status_code = oa2response.status

        response.content = oa2response.body

        for key, value in oa2response.headers.iteritems():

            response[key] = value

        return response

    def build_request(self, django_request):

        params = {

            'method': django_request.method,

            'path': django_request.path,

            'GET': django_request.GET,

            'POST': django_request.POST,

            'META': django_request.META,

            'secure': settings.DEBUG or django_request.is_secure(),

            #'secure': django_request.is_secure(),

        }

        # TODO: check for valid astakos user

        if django_request.user.is_authenticated():

            params['user'] = django_request.user

        return oa2base.Request(**params)

    def get_url_patterns(self):

        _patterns = patterns(

            '',

            url(r'^%s/?$' % join_urls(self.endpoints_prefix,

                                      self.authorization_endpoint.rstrip('/')),

                self.auth_view,

                name='%s_authenticate' % self.id),

            url(r'^%s/?$' % join_urls(self.endpoints_prefix,

                                      self.token_endpoint.rstrip('/')),

                self.token_view,

                name='%s_token' % self.id),

        )

        return _patterns

    def is_uri(self, string):

        validator = URLValidator()

        try:

            validator(string)

        except ValidationError:

            return False

        else:

            return True

    def get_login_uri(self):

        return reverse('login')

class AstakosBackend(DjangoBackend):

    pass