I have been struggling for the past couple of days with setting up a webhook for outlook via the Graph API of microsoft. Initially, I hosted my application locally and exposed it to the internet with ngrok. Connecting to the Graph API worked well. However, when I moved my application to the cloud. I noticed that each time I tried to setup the Graph API webhook for outlook, I received a timeout error. I checked my Azure endpoint with:

curl -X POST https://db.chainfill.bluewaterfall.nl/email-integration/emails?validationToken=someToken -H "Accept: text/plain" -v

and everything worked fine, yielding a 200 Ok response. I also tracked the incomming headers for my application on Azure. When I make a subscription request, the entire backend seems non responsive, as if the graph API request blocks the entire server.

Tim out error:

Starting new HTTPS connection (1): graph.microsoft.com:443 https://graph.microsoft.com:443 "POST /v1.0/subscriptions HTTP/1.1" 400 None Graph API Error: {'error': {'code': 'ValidationError', 'message': 'Subscription validation request timed out.', 'innerError': {'date': '2024-05-14T16:12:13', 'request-id': 'eb76a2e1-95c7-439c-aaca-6efaf031723d', 'client-request-id': 'eb76a2e1-95c7-439c-aaca-6efaf031723d'}}}

Right afte receiving the time out error:

Response for /email-integration/subscription with headers: {'Content-Type': 'application/json', 'Vary': 'Accept, origin', 'Allow': 'POST, OPTIONS', 'X-Frame-Options': 'DENY', 'Content-Length': '42', 'X-Content-Type-Options': 'nosniff', 'Referrer-Policy': 'same-origin', 'Cross-Origin-Opener-Policy': 'same-origin'}
Response Status Code: 200 Response Content Type: application/json Incoming request at /email-integration/emails with headers: {'Host': 'db.chainfill.bluewaterfall.nl', 'X-Real-Ip': '137.135.11.116', 'X-Forwarded-For': '137.135.11.116', 'X-Forwarded-Proto': 'https', 'Connection': 'close', 'Content-Length': '0', 'Client-Request-Id': 'eb76a2e1-95c7-439c-aaca-6efaf031723d', 'Accept': 'text/plain', 'Content-Type': 'text/plain; charset=utf-8'}

Request Path: /email-integration/emails

Request Method: POST

Request Query Params: <QueryDict: {'validationToken': ['Validation: Testing client application reachability for subscription Request-Id: eb76a2e1-95c7-439c-aaca-6efaf031723d']}>

Accept Headers: text/plain Request URL: https://db.chainfill.bluewaterfall.nl/email-integration/emails?validationToken=Validation%3a+Testing+client+application+reachability+for+subscription+Request-Id%3a+eb76a2e1-95c7-439c-aaca-6efaf031723d

validation_token Validation: Testing client application reachability for subscription Request-Id: eb76a2e1-95c7-439c-aaca-6efaf031723d

Received validation token Response for /email-integration/emails with headers: {'Content-Type': 'text/plain', 'X-Frame-Options': 'DENY', 'Content-Length': '117', 'Vary': 'origin', 'X-Content-Type-Options': 'nosniff', 'Referrer-Policy': 'same-origin', 'Cross-Origin-Opener-Policy': 'same-origin'}

Response Status Code: 200 Response Content Type: text/plain

This is the piece of the code that receives the validation post message from graph api:

Python

`@method_decorator(csrf_exempt, name=’dispatch’)
class GetMailsFromOutlookView(View):
“””Fetches an email from outlook when a new email is received”””
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer

# Need to secure this route still

def post(self, request, *args, **kwargs):
    global last_processed
    debounce_period = 30
    try:
        logging.debug(f'Request URL: {request.build_absolute_uri()}')
        # Retrieve the validation token from the query parameters
        validation_token = request.GET.get('validationToken')
        logging.debug(f'validation_token {validation_token}')
        if validation_token:
            logging.debug('Received validation token')
            # Check the Accept header and adjust the content type of the response accordingly
            accept_header = request.headers.get('Accept', 'text/plain')  # Default to text/plain if not specified
            if 'text/plain' in accept_header:
                return HttpResponse(validation_token, content_type="text/plain", status=200)
            else:
                return HttpResponse("Unsupported media type", status=415)`

I have also tried hosting on aws, but the same problem arrised. The Vm that I’m running is: Standard B2ms (2 vcpus, 8 GiB memory). If somebody encountered a similar problem or knows some steps forward that I can take, it would be greatly appreciated. Thanks a lot!

Best regards,

Yorick

Tried:

• Hosting on Azure
• Hosting on AWS
• Different endpoint configurations

Expected:

• resolve the timeout error