Synnefo

# Copyright 2011 GRNET S.A. All rights reserved.

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import datetime

from functools import wraps

from traceback import format_exc

from django.conf import settings

from django.http import (HttpResponse, HttpResponseBadRequest,

        HttpResponseServerError)

from synnefo.plankton.backend import ImageBackend, BackendException

from synnefo.util.log import getLogger

log = getLogger('synnefo.plankton')

def get_user_from_token(token):

    return None

def get_request_user(request):

    user = get_user_from_token(request.META.get('HTTP_X_AUTH_TOKEN'))

    if not user:

        user = get_user_from_token(request.COOKIES.get('X-Auth-Token'))

    return user

def plankton_method(method):

    def decorator(func):

        @wraps(func)

        def wrapper(request, *args, **kwargs):

            try:

                if request.method != method:

                    return HttpResponse(status=405)

                if not request.user:

                    return HttpResponse(status=401)

                request.backend = ImageBackend(request.user)

                return func(request, *args, **kwargs)

            except (AssertionError, BackendException) as e:

                message = e.args[0] if e.args else ''

                return HttpResponseBadRequest(message)

            except Exception as e:

                if settings.DEBUG:

                    message = format_exc(e)

                else:

                    message = ''

                log.exception(e)

                return HttpResponseServerError(message)

            finally:

                if hasattr(request, 'backend'):

                    request.backend.close()

        return wrapper

    return decorator