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I am working on a django webapp. I connected the paytm payment gateway with the django app. I did everything according to the docs, and everything works. almost.
I am having a problem when calling the callback URL once the payment is over.
Here is the code
def donate(request):
if request.method == "POST":
form = DonateForm(request.POST)
name = request.POST.get('firstName')
phone = request.POST.get('phone')
email = request.POST.get('email')
amount = float("{0:.2f}".format(int(request.POST.get('amount'))))
ord_id = OrdID()
cust_id = CustID()
paytm_params = {
"MID" : MERCHANTID,
"WEBSITE" : "WEBSTAGING",
"INDUSTRY_TYPE_ID" : "Retail",
"CHANNEL_ID" : "WEB",
"ORDER_ID" : ord_id,
"CUST_ID" : cust_id,
"MOBILE_NO" : phone,
"EMAIL" : email,
"TXN_AMOUNT" : str(amount),
"CALLBACK_URL" : "http://127.0.0.1:8000/payment/status",
}
paytm_params['CHECKSUMHASH'] = Checksum.generate_checksum(paytm_params, MERCHANTKEY)
return render(request, 'paytm.html', {'paytm_params': paytm_params})
else:
form = DonateForm()
context = {'Donate': form}
return render(request, 'donate.html', context=context)
@csrf_exempt
def handlerequest(request):
if request.method == 'POST':
form = request.POST
response_dict = {}
for i in form.keys():
response_dict[i] = form[i]
if i == 'CHECKSUMHASH':
checksum = form[i]
print(checksum)
verify = Checksum.verify_checksum(response_dict, MERCHANTKEY, checksum)
if verify:
if response_dict['RESPCODE'] == '01':
print('order successful')
else:
print('error: ' + response_dict['RESPMSG'])
return render(request, 'paymentstatus.html', {'response': response_dict})
path('donate', views.donate, name='donate'),
path('payment/status', views.handlerequest, name='handlerequest'),
<form class="test_paytm" action="{% url 'donate' %}" method="post">
{% csrf_token %}
<div class="row">
<div class="col">
{{ Donate.firstName|as_crispy_field }}
</div>
<div class="col">
{{ Donate.lastName|as_crispy_field }}
</div>
</div>
<div class="row">
<div class="col">
{{ Donate.email|as_crispy_field }}
</div>
<div class="col">
{{ Donate.phone|as_crispy_field }}
</div>
</div>
<div class="row">
<div class="col">
{{ Donate.amount|as_crispy_field }}
</div>
</div>
<button type="submit" name="button" class="btn btn-lg mb-5 contact_submit">Donate</button>
</form>
<html>
<head>
<title>Merchant Check Out Page</title>
</head>
<body>
<center>
<h1>Please do not refresh this page...</h1>
</center>
<form method="post" action="https://securegw.paytm.in/order/process" name="paytm">
{% for key, value in paytm_params.items %}
<input type="hidden" name="{{key}}" value="{{value}}">
{% endfor %}
</form>
</body>
<script type="text/javascript">
document.paytm.submit()
</script>
</html>
<div class="container">
{% if response_dict.RESPCODE == 01 %}
<center>
<h2>Thank you for your donation</h2>
<p>
We are thrilled to have your support. Through your donation we will be able to accomplish our goal. You truly make the difference for us, and we are
extremely grateful!
</p>
</center>
<h3>Order ID: {{response_dict.ORDERID}}</h3>
<h3>Order Date: {{response_dict.TXNDATE}}</h3>
<h3>Amount: {{response_dict.TXNAMOUNT}}</h3>
<h3>Payment Mode: {{response_dict.PAYMENTMODE}}</h3>
{% else %}
<center>
<p>
There seems to be a problem. We will try to fix this from our end.
</p>
</center>
{% endif %}
</div>
But once the payment is over, The website is not calling handlerequest from views.py correctly. That is why I had added the @csrf_exempt so that an outside page can call the url without any issues. But I am still getting the 403 error. I am not sure what I am doing wrong
I have added the paytm.html code to the question. I personally dont feel that the problem is with this page, as all that the page does is redirect to the payment gateway page of paytm. The problem I am facing is when returning back to my url ie. paymentstatus.html. That is through the handlerequest view. The donation process is as follows
donate.html and clicks the donate button.paytm.html gets the information and automatically routes to paytm payment gatewaypaymentstatus.html page is displayed.As the paymentstatus.html page is being called from an external url, csrf_exempt is required, which I have provided. But for some reason that does not work
When I spoke to the technical team at Paytm they told me that I had to accept the callback URL in POST. The person I spoke to, had little experience in django and could not help me further. I am not really sure what accepting the response in POST means. Can someone help me out?
Edited the handlerequest view
636
it is very simple matter, all you have to do is to add a new url in your Django app then register it with the API you are calling, I am not familiar at all with PAYTM however definitely you will find a place to register it through your dashboard or if they have CLI interface.
#urls.py
path('payment/status/', views.check_status, name='payment_status') # the same full url to register in callback url in their website
#views.py
@csrf_exempt # API doesn't know how to send you csrf token
def check_status(request):
if request.method == 'POST':
print(request.POST)# examine the data returned from the API
place the following stub inside the payment form
<input type="hidden" name="next" value="{% url 'payment_status' %}" />
And then from you submission view
# force the redirect to
return redirect(request.POST.get('next') or 'where_ever_you_send_your_user')
But once the payment is over, The website is not calling handlerequest from views.py correctly. That is why I had added the @csrf_exempt so that an outside page can call the url without any issues. But I am still getting the 403 error. I am not sure what I am doing wrong
Is this 403 error coming from your server ? Or you are just seeing 403 in the browser... ?
I don't believe Paytm can access your server when your callback url is http://127.0.0.1:8000. In order for Paytm to access your server you need to provide your public IP address in the callback url and then configure your router to open port 8000 and then forward all requests from port 8000 to your machine. But since you didn't mention you have done that, my guess is you haven't done it.
2
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