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@victorono
Forked from raliste/gist:4091897
Created April 25, 2014 04:25
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## views.py
import tempfile
import os
import commands
import cgi
from django import http
from django.views.decorators.csrf import csrf_exempt
from django.shortcuts import render
from django.views.decorators.http import require_POST
from django.conf import settings
from joldit.apps.payments.models import Order
SUCCESS_RESPONSE = 'ACEPTADO'
FAILURE_RESPONSE = 'RECHAZADO'
VALID_MAC_RESPONSE = 'CORRECTO'
@csrf_exempt
def success(request):
return render(request, 'payments/success.html')
def fail(request):
return render(request, 'payments/fail.html')
@require_POST
@csrf_exempt
def callback(request):
transaction_code = request.POST.get('TBK_RESPUESTA')
unique_id = request.POST.get('TBK_ORDEN_COMPRA')
amount = int(request.POST.get('TBK_MONTO')) / 100
authorization_code = request.POST.get('TBK_CODIGO_AUTORIZACION')
transaction_id = request.POST.get('TBK_ID_TRANSACCION')
last_4_digits = request.POST.get('TBK_FINAL_NUMERO_TARJETA')
success = False
qs = _get_qs(request)
order_obj = Order.objects.get(unique_id=unique_id)
order_obj.transaction_code = transaction_code
order_obj.gateway_response = qs
order_obj.transaction_id = transaction_id
order_obj.last_4_digits = last_4_digits
if transaction_code == '0' and _valid_mac(qs) == VALID_MAC_RESPONSE:
if order_obj.amount == amount and not order_obj.authorization_code:
order_obj.authorization_code = authorization_code
order_obj.status = order_obj.PAID
success = True
else:
order_obj.status = order_obj.INVALID_AMOUNT
else:
order_obj.status = order_obj.INVALID
order_obj.save()
if success:
order_obj.notify_reservation()
return http.HttpResponse(SUCCESS_RESPONSE)
return http.HttpResponse(FAILURE_RESPONSE)
def _get_qs(request):
return '&'.join(['%s=%s' % (k,v) for k,v in cgi.parse_qsl(request.body)])
def _valid_mac(qs):
descriptor, temp_path = tempfile.mkstemp()
f = os.fdopen(descriptor, 'w')
f.write(qs)
f.close()
command = '%(mac)s %(temp_path)s' % {
'mac': settings.WEBPAY_MAC_CGI,
'temp_path': temp_path
}
valid_mac = commands.getoutput(command).strip() == VALID_MAC_RESPONSE
os.remove(temp_path)
return VALID_MAC_RESPONSE if valid_mac else FAILURE_RESPONSE
## models.py
from django.db import models
from django.utils.translation import ugettext_lazy as _
from joldit.apps.spaces.models import Reservation
TRANSACTION_CODES = {
'0': _('Transaction approved.'),
'-1': _('Transaction denied.'),
'-2': _('Transaction must retry.'),
'-3': _('Error in transaction.'),
'-4': _('Transaction denied.'),
'-5': _('Denied by error in rate.'),
'-6': _('Exceeds monthly limit.'),
'-7': _('Exceeds daily limit by transaction.'),
'-8': _('Not authorized.')
}
class Order(models.Model):
WEBPAY = 'webpay'
TRANSFER = 'transfer'
SOURCES = (
(WEBPAY, _('Webpay Chile')),
(TRANSFER, _('Transfer'))
)
PENDING, PAID, CANCELED, INVALID, INVALID_AMOUNT = range(5)
STATUSES = (
(PENDING, _('Pending')),
(PAID, _('Paid')),
(CANCELED, _('Canceled')),
(INVALID, _('Invalid')),
(INVALID_AMOUNT, _('Invalid Amount'))
)
reservation = models.ForeignKey(Reservation)
unique_id = models.CharField(max_length=42, unique=True)
status = models.PositiveSmallIntegerField(choices=STATUSES, default=PENDING)
source = models.CharField(max_length=10, choices=SOURCES, blank=True)
amount = models.PositiveIntegerField(default=0)
transaction_code = models.IntegerField(default=0)
authorization_code = models.CharField(max_length=80, blank=True)
last_4_digits = models.CharField(max_length=4, blank=True)
transaction_id = models.CharField(max_length=80, blank=True)
received_at = models.DateTimeField()
created_at = models.DateTimeField(auto_now_add=True)
gateway_response = models.TextField()
class Meta:
db_table = 'orders'
def __unicode__(self):
return '%s:%s' % (self.unique_id, self.get_status_display())
def get_receipt_number(self):
return '%06d' % self.id
def get_transaction_message(self):
return TRANSACTION_CODES.get(self.transaction_code)
def notify_reservation(self):
"""Notifies the reservation about this order being paid."""
reservation = self.reservation
if self.amount >= reservation.total:
reservation.change_and_log(reservation.from_user, Reservation.PAID,
'Paid by order_unique_id %s' % self.unique_id)
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