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105 lines
4.5 KiB
Python
105 lines
4.5 KiB
Python
import json
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import logging
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import stripe
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from django.conf import settings
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from django.contrib.contenttypes.models import ContentType
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from django.http import HttpRequest, HttpResponse
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from django.views.decorators.csrf import csrf_exempt
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from corporate.lib.stripe import STRIPE_API_VERSION
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from corporate.lib.stripe_event_handler import (
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handle_checkout_session_completed_event,
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handle_payment_intent_payment_failed_event,
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handle_payment_intent_succeeded_event,
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)
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from corporate.models import Event, PaymentIntent, Session
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from zproject.config import get_secret
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billing_logger = logging.getLogger("corporate.stripe")
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@csrf_exempt
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def stripe_webhook(request: HttpRequest) -> HttpResponse:
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stripe_webhook_endpoint_secret = get_secret("stripe_webhook_endpoint_secret", "")
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if (
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stripe_webhook_endpoint_secret and not settings.TEST_SUITE
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): # nocoverage: We can't verify the signature in test suite since we fetch the events
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# from Stripe events API and manually post to the webhook endpoint.
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try:
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stripe_event = stripe.Webhook.construct_event(
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request.body,
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request.META.get("HTTP_STRIPE_SIGNATURE"),
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stripe_webhook_endpoint_secret,
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)
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except ValueError:
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return HttpResponse(status=400)
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except stripe.error.SignatureVerificationError:
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return HttpResponse(status=400)
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else:
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assert not settings.PRODUCTION
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try:
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stripe_event = stripe.Event.construct_from(json.loads(request.body), stripe.api_key)
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except Exception:
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return HttpResponse(status=400)
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if stripe_event.api_version != STRIPE_API_VERSION:
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error_message = f"Mismatch between billing system Stripe API version({STRIPE_API_VERSION}) and Stripe webhook event API version({stripe_event.api_version})."
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billing_logger.error(error_message)
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return HttpResponse(status=400)
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if stripe_event.type not in [
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"checkout.session.completed",
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"payment_intent.succeeded",
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"payment_intent.payment_failed",
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]:
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return HttpResponse(status=200)
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if Event.objects.filter(stripe_event_id=stripe_event.id).exists():
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return HttpResponse(status=200)
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event = Event(stripe_event_id=stripe_event.id, type=stripe_event.type)
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if stripe_event.type == "checkout.session.completed":
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stripe_session = stripe_event.data.object
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assert isinstance(stripe_session, stripe.checkout.Session)
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try:
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session = Session.objects.get(stripe_session_id=stripe_session.id)
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except Session.DoesNotExist:
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return HttpResponse(status=200)
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event.content_type = ContentType.objects.get_for_model(Session)
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event.object_id = session.id
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event.save()
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handle_checkout_session_completed_event(stripe_session, event)
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elif stripe_event.type == "payment_intent.succeeded":
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stripe_payment_intent = stripe_event.data.object
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assert isinstance(stripe_payment_intent, stripe.PaymentIntent)
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try:
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payment_intent = PaymentIntent.objects.get(
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stripe_payment_intent_id=stripe_payment_intent.id
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)
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except PaymentIntent.DoesNotExist:
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# PaymentIntent that was not manually created from the billing system.
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# Could be an Invoice getting paid which is not an event we are interested in.
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return HttpResponse(status=200)
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event.content_type = ContentType.objects.get_for_model(PaymentIntent)
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event.object_id = payment_intent.id
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event.save()
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handle_payment_intent_succeeded_event(stripe_payment_intent, event)
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elif stripe_event.type == "payment_intent.payment_failed":
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stripe_payment_intent = stripe_event.data.object
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try:
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assert isinstance(stripe_payment_intent, stripe.PaymentIntent)
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payment_intent = PaymentIntent.objects.get(
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stripe_payment_intent_id=stripe_payment_intent.id
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)
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except PaymentIntent.DoesNotExist:
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# PaymentIntent that was not manually created from the billing system.
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# Could be an Invoice getting paid which is not an event we are interested in.
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return HttpResponse(status=200)
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event.content_type = ContentType.objects.get_for_model(PaymentIntent)
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event.object_id = payment_intent.id
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event.save()
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handle_payment_intent_payment_failed_event(stripe_payment_intent, event)
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return HttpResponse(status=200)
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