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'''
This module is responsible for automatic processing of provider callback
data (asynchronous transaction updates).
'''
from __future__ import unicode_literals
from django.conf.urls import url
from django.http import Http404
from django.shortcuts import get_object_or_404
from django.views.decorators.csrf import csrf_exempt
try:
from django.db.transaction import atomic
except ImportError:
def atomic(func):
return func
from . import get_payment_model
from .core import provider_factory
@csrf_exempt
@atomic
def process_data(request, token, provider=None):
'''
Calls process_data of an appropriate provider.
Raises Http404 if variant does not exist.
'''
Payment = get_payment_model()
payment = get_object_or_404(Payment, token=token)
if not provider:
try:
provider = provider_factory(payment.variant)
except ValueError:
raise Http404('No such payment')
return provider.process_data(payment, request)
@csrf_exempt
@atomic
def static_callback(request, variant):
try:
provider = provider_factory(variant)
except ValueError:
raise Http404('No such provider')
token = provider.get_token_from_request(request=request, payment=None)
if not token:
raise Http404('Invalid response')
return process_data(request, token, provider)
urlpatterns = [
url(r'^process/(?P<token>[0-9a-z]{8}-[0-9a-z]{4}-'
'[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12})/$', process_data,
name='process_payment'),
url(r'^process/(?P<variant>[a-z-]+)/$', static_callback,
name='static_process_payment')]
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