sample.py

Sample Integration payU in django based projects

Settings.py


PAYU_INFO = {

			   'merchant_key': "test merchant key",
			   'merchant_salt': "test merchant salt",
			   # for production environment use 'https://secure.payu.in/_payment'
			   'payment_url': 'https://test.payu.in/_payment',
			   'surl':'http://example.com/pay-success/',
			   'furl':'http://example.com/failure/',
			   'curl':'http://example.com/cancel/',
			}


Urls.py

""" Define your urls here , this urls needed for PayU transaction """

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

urlpatterns = patterns('',

	url(r'^pay-success/$','apps.billing.views.success', name='payu_success'),
	url(r'^failure/$', 'apps.billing.views.failure', name='failure'),
	url(r'^cancel/$', 'apps.billing.views.cancel', name='cancel'),
	url(r'^success/$','apps.buyer.views.success',name='success'),

)



models.py 

from django.db import models
from uuid import uuid4
from uuid import UUID
import uuid
from django_extensions.db.fields import UUIDField


class MyOrder(models.Model):
 	items = models.ManyToManyField(OrderItem, null=True, blank=True)
	order_date = models.DateField(auto_now=True)
	buyer = models.ForeignKey(Buyer)

	txnid = models.CharField(max_length=36, primary_key=True)
	amount = models.FloatField(null=True, blank=True,default=0.0)
	hash = models.CharField(max_length=500, null=True, blank=True)
	billing_name = models.CharField(max_length=500, null=True, blank=True)
	billing_street_address = models.CharField(max_length=500, null=True, blank=True)
	billing_country = models.CharField(max_length=500, null=True, blank=True)
	billing_state = models.CharField(max_length=500, null=True, blank=True)
	billing_city = models.CharField(max_length=500, null=True, blank=True)
	billing_pincode = models.CharField(max_length=500, null=True, blank=True)
	billing_mobile = models.CharField(max_length=500, null=True, blank=True)
	billing_email = models.CharField(max_length=500, null=True, blank=True)

	shipping_name = models.CharField(max_length=500, null=True, blank=True)
	shipping_street_address = models.CharField(max_length=500, null=True, blank=True)
	shipping_country = models.CharField(max_length=500, null=True, blank=True)
	shipping_state = models.CharField(max_length=500, null=True, blank=True)
	shipping_city = models.CharField(max_length=500, null=True, blank=True)
	shipping_pincode = models.CharField(max_length=500, null=True, blank=True)
	shipping_mobile = models.CharField(max_length=500, null=True, blank=True)
	shipping_rate = models.FloatField(null=False, blank=False, default=0.0)
	status = models.CharField(max_length=500, null=True, blank=True)
	shipping_email = models.CharField(max_length=500, null=True, blank=True)

	payment_method = models.CharField(max_length=1000,verbose_name='Payment-method')
	is_paid = models.BooleanField(default=False)
	is_delivered = models.BooleanField(default=False)
	is_accepted = models.BooleanField(default=False)



Views.py 


from django.core.exceptions import ObjectDoesNotExist
from django.contrib.auth.decorators import login_required
import hashlib
from django.conf import settings
from .util import generate_hash

@login_required

def buy_order(request):
	""" funtion for save all orders and genarate order id"""
	items = None
	orderitem = None
	extra = False
	if request.user.is_authenticated() and not request.user.is_staff:
		user = Buyer.objects.get(id=request.user.id) // Buyer is model for Users
		try:
			cart = Cart.objects.get(buyer=request.user) // Check Any items is there in Cart Model
		except ObjectDoesNotExist:
			extra = "You dont have any item in your cart" // Intializing there is no items in cart
			variables = RequestContext(request, {'extra': extra})
			return render_to_response('home.html', variables) // return back to home page with message (use "reverse")

		total_amount = OrderItem.objects.filter(buyer=request.user) // get the total amount from the OrderItem Model
		item_list = []
		rg = rg

		if cart and request.POST:

			""" Validaing shipping address details from Post request """
			if rg('shippingnme')and rg('shippingaddress') and rg('shippingemail') and rg('shippingpostel'):
					try:
						"""store all products to MyOrder model and genarate order id for the order"""
						myorder = MyOrder(buyer=user)
						myorder.buyer = user
						myorder.billing_name = rg('billingname')
						myorder.billing_street_address = rg('billingaddress')
						myorder.billing_pincode = rg('billingpostel')
						myorder.billing_city = rg('billingcity')
						myorder.billing_country = rg('billingcountry')
						myorder.billing_state = rg('billingstate')
						myorder.billing_mobile = rg('billingphone')
						myorder.billing_email = rg('billingemail')

						# myorder of shipping Address
						myorder.shipping_pincode = rg('shippingpostel')
						myorder.shipping_name = rg('shippingnme')
						myorder.shipping_street_address = rg('shippingaddress')
						myorder.shipping_city = rg('shippingcity')
						myorder.shipping_state = rg('shippingstate')
						myorder.shipping_mobile = rg('shippingphone')
						myorder.shipping_country = rg('shippingcountry')
						myorder.shipping_email = rg('shippingemail')

						""" Checking whether the payment method is COD or Online """

						if rg('paymentmethod'):
							myorder.payment_method = rg('paymentmethod')
						else:
							myorder.payment_method = 'ON'
						myorder.comment =  rg('prodcutmessage')
						myorder.txnid = str(uuid.uuid1().int >> 64)
						myorder.save()

						""" genarate an oredr id, the below loop will add all orderd product to the OrderItem Model """

						for order in cart.items.all():
							orderitem = OrderItem()
							orderitem.buyer = order.buyer
							orderitem.product_id = order.product.id
							orderitem.product_title = order.product.name
							orderitem.weight = order.product.weight
							orderitem.product_price = order.product.gross_pay()[0]
							orderitem.total_amount = order.total
							orderitem.quantity = order.quantity
							orderitem.save()
							myorder.items.add(orderitem)

						total_details = total_price_fu(myorder)

						""" After adding products to order assigning a
						transaction amount and shipping charge to the order """

						myorder = MyOrder.objects.get(pk=myorder.txnid)
						myorder.amount = total_details['grand_total']
						myorder.shipping_rate = total_details['shipping_rate']

						""" Assigning all values for hash funtion for payu """

						cleaned_data = {
						'key': settings.PAYU_INFO['merchant_key'],'txnid': myorder.txnid, 
						'amount': myorder.amount,'productinfo':orderitem.product_title,
						'firstname': myorder.billing_name,'email': myorder.billing_email, 
						'udf1': '', 'udf2': '', 'udf3': '', 'udf4': '', 'udf5': '', 'udf6': '',                                   
						'udf7': '',  'udf8': '', 'udf9': '', 'udf10': ''}

						""" the generate_hash funtion is use for genarating hash
						value from cleaned_data """

						""" generate_hash i defaine in below this code please reffer """

						hash_o = generate_hash(cleaned_data)
						myorder.hash =hash_o
						myorder.save()
						return HttpResponse(
							 """
							 	<html>
									  <head><title>Redirecting...</title></head>
									  <body>
									  <form action='%s' method='post' name="payu">
										  <input type="hidden" name="firstname" value="%s" />
										  <input type="hidden" name="surl" value="%s" />
										  <input type="hidden" name="phone" value="%s" />
										  <input type="hidden" name="key" value="%s" />
										  <input type="hidden" name="hash" value =
										  "%s" />
										  <input type="hidden" name="curl" value="%s" />
										  <input type="hidden" name="furl" value="%s" />
										  <input type="hidden" name="txnid" value="%s" />
										  <input type="hidden" name="productinfo" value="%s" />
										  <input type="hidden" name="amount" value="%s" />
										  <input type="hidden" name="email" value="%s" />
										  <input type="hidden" value="submit">
									  </form>
									  </body>
									  <script language='javascript'>
									  window.onload = function(){
									   document.forms['payu'].submit()
									  }
									  </script>
								 </html>""" % (settings.PAYU_INFO['payment_url'],
												 myorder.billing_name, settings.PAYU_INFO[
													 'surl'],
												 myorder.billing_mobile,
												 settings.PAYU_INFO['merchant_key'],
												 hash_o,
												 settings.PAYU_INFO['curl'],
												 settings.PAYU_INFO['furl'],
												 myorder.txnid,
												 orderitem.product_title,
												 myorder.amount,
												 myorder.billing_email
												 )
										)



util.py 


from hashlib import sha512
from django.conf import settings
KEYS = ('key', 'txnid', 'amount', 'productinfo', 'firstname', 'email',
		'udf1', 'udf2', 'udf3', 'udf4', 'udf5',  'udf6',  'udf7', 'udf8',
		'udf9',  'udf10')

def generate_hash(data):
	keys = ('key', 'txnid', 'amount', 'productinfo', 'firstname', 'email',
			'udf1', 'udf2', 'udf3', 'udf4', 'udf5',  'udf6',  'udf7', 'udf8',
			'udf9',  'udf10')
	hash = sha512('')
	for key in KEYS:
		hash.update("%s%s" % (str(data.get(key, '')), '|'))
	hash.update(settings.PAYU_INFO.get('merchant_salt'))
	return hash.hexdigest().lower()

def verify_hash(data, SALT):
	keys.reverse()
	hash = sha512(settings.PAYU_INFO.get('merchant_salt'))
	hash.update("%s%s" % ('|', str(data.get('status', ''))))
	for key in KEYS:
		hash.update("%s%s" % ('|', str(data.get(key, ''))))
	return (hash.hexdigest().lower() == data.get('hash'))


After the Transaction you will get response in Json format , you can validate  the amount , transaction id,
item  details etc , ie, whatever details we gave to Payu for transaction it will return all the data which we
provided with status message ( success, failure , cancel )

Example Queryset in Json Format

<QueryDict: {u'name_on_card': [u'sda'], u'net_amount_debit': [u'10'], u'payment_source': [u'payu'], u'udf10': [u''], 
u'issuing_bank': [u'AXIS'], u'field7': [u''], u'udf3': [u''], u'unmappedstatus': [u'captured'], 
u'card_type': [u'VISA'], u'PG_TYPE': [u'HDFC'], u'addedon': [u'2014-10-20 18:50:38'], u'city': [u''], 
u'field8': [u''], u'field9': [u'SUCCESS'], u'field2': [u'999999'], u'field3': [u'2819211501842931'], 
u'field1': [u'429367481506'], u'field6': [u''], u'zipcode': [u''], u'field4': [u'-1'], u'field5': [u''], 
u'productinfo': [u'adsdsd'], u'address1': [u''], u'discount': [u'0.00'], u'email': [u'djangorenjith@gmail.com'],
u'cardhash': [u'This field is no longer supported in postback params.'], u'udf4': [u''], u'status': [u'success'], 
u'bank_ref_num': [u'2819211501842931'], u'error_Message': [u'No Error'], }


Accodrding to Transaction Status Payu Automaticaly redirect to the provided url , you can get the Response in views 
using get method (request.POST.get('status')=='success' )
 

# Transaction Success
@csrf_exempt
def success(request):
	========================
	   do what functionality you need 
	=========================
# Transaction Failure
@csrf_exempt
def failure(request):
	========================
		do what functionality you need 
	=========================
# Transaction Cancel
@csrf_exempt
def cancel(request):
	========================
	   do what functionality you need 
	=========================