Stripe subscription cancel: KeyError 'HTTP_STRIPE_SIGNATURE'

Question

I'm trying to configure Django Stripe Subscriptions for WebApp.

I want to let Subscribed users cancel the subscription themselves.

The code below is to delete user's information from StripeAPI and Django StripeCustomer model.

Here is view.py

import stripe
from django.conf import settings
from django.contrib.auth.decorators import login_required
from django.contrib.auth.models import User  
from django.http.response import JsonResponse, HttpResponse  
from django.shortcuts import render
from django.views.decorators.csrf import csrf_exempt
from django.contrib.auth import get_user_model
from subscriptions.models import StripeCustomer 

@login_required    
@csrf_exempt
def cancel_subscription(request):
    if request.user.is_authenticated:

        endpoint_secret = settings.STRIPE_ENDPOINT_SECRET
        payload = request.body
        event = None
        sig_header = request.META['HTTP_STRIPE_SIGNATURE']
       
        event = stripe.Webhook.construct_event(
        payload, sig_header, endpoint_secret
        )
        session = event['data']['object']

        stripe_customer = StripeCustomer.objects.get(user=request.user)
        stripe.api_key = settings.STRIPE_SECRET_KEY
        sub_id = stripe.Subscription.retrieve(stripe_customer.stripeSubscriptionId)
        client_reference_id = session.get('client_reference_id')
        user = get_user_model().objects.get(id=client_reference_id)

        try:
            #delete from stripeapi
            stripe.Subscription.delete(sub_id)

            #delete from StripeCustomer model
            StripeCustomer.objects.delete(
            user=user,
            stripeCustomerId=stripe_customer_id,
            stripeSubscriptionId=stripe_subscription_id,
            )
            print(user.username + ' unsubscribed.')
        except Exception as e:
            import traceback
            traceback.print_exc()
            return JsonResponse({'error': (e.args[0])}, status =403)
    
    return render(request, 'home.html')

When I excecute the code error occuerd at

sig_header = request.META['HTTP_STRIPE_SIGNATURE']

The error message is below

Exception Type: keyError

Exception Value: 'HTTP_STRIPE_SIGNATURE'

I don't understand why the error occurs at request.META['HTTP_STRIPE_SIGNATURE'],because other part of this view can execute this code.

I just mentioned the above settings in this question but still if more code is required then tell me I'll update my question with that information. Thank you

Answer 1

I think you're mixing up a webhook handler and a regular POST request route as part of your application here. You either need one or the other, and I suspect you don't need the webhook stuff at all given what you're trying to to.