Event Grid Subscription create issue

Bimala Shrestha 5

Deploying Event Subscription: figsflowemail

Deployment has failed with the following error: {"code": "URL validation", "message": "Webhook validation handshake failed for https://email..................................... Http POST request failed with response code Unknown. For troubleshooting, visit https://aka.ms/esvalidation. Activity id:5ec939e2-138b-4078-aca1-0b71f83b5941, timestamp: 11/5/2024 7:27:57 AM (UTC)."}

Sander van de Velde | MVP 33,231 Reputation points MVP

2024-11-06T23:07:41.04+00:00

Hello @Bimala Shrestha ,

welcome to this moderated Azure community forum.

Better questions with more information lead to better answers from our community members.

Please provide information about the steps you have taken, the guide you follow, and the errors you receive so fellow members can understand your question better.

It seems you want to make use of an EventGrid topic with a webhook destination?

If so, are you aware the EventGrid does a little test on the first call to check out if you are the owner of the endpoint?

Then, have you checked the message that the destination gets? (it contains a url the owner needs to respond too, only once)
JananiRamesh-MSFT 28,326 Reputation points

2024-11-07T05:20:45.38+00:00

@Bimala Shrestha Thanks for reaching out. I understand that you're trying to create a EventGrid subscription with destination as webhook endpoint. As Sander mentioned above EventGrid does a test on the first call to check out if you are the owner of the endpoint I see here the endpoint is https://email.figsflow.com/email-event-status/event.

Did https://email.figsflow.com/email-event-status/event. handle the validation payload and return a 200 status code?

figsflow seems to be a 3rd party SAS product - Proposal, Engagement Letter Software for Accountants | Figsflow

Could you please tell us how are you able to handle the validation payload sent by EventGrid?

For more information please refer: https://learn.microsoft.com/en-us/azure/event-grid/troubleshoot-subscription-validation

Bhupendra Khatri 10

Hi Ramesh,

I am getting the same issue while my server log is showing no external api is hitting,

My server is responding status 200 with response body :

{
    "validationResponse": "F4896D61-8938-41B1-A559-EC869F6E3F29"
}

while my JSON body is :

[
  {
    "id": "29ac23bd-9331-4186-b51d-9319c84c31b9",
    "topic": "/subscriptions/b89a0738-6bf5-496f-b2f6-386f7b9116d3/resourceGroups/communicationservicesfigsflow/providers/microsoft.communication/communicationservices/communicationservicesfigsflow",
    "subject": "",
    "data": {
      "validationCode": "F4896D61-8938-41B1-A559-EC869F6E3F29",
      "validationUrl": "https://rp-global.eventgrid.azure.net:553/eventsubscriptions/testemail/validate?id=F4896D61-8938-41B1-A559-EC869F6E3F29&t=2024-11-05T09:43:34.0981666Z&apiVersion=2023-12-15-preview&token=HoOtR2B3sjWbS01f%2fXLzv%2fSOfHgeEif%2fZ5XH0azaou8%3d"
    },
    "eventType": "Microsoft.EventGrid.SubscriptionValidationEvent",
    "eventTime": "2024-11-05T09:43:34.0982159Z",
    "metadataVersion": "1",
    "dataVersion": "2"
  }
]

while sending header : aeg-event-type : SubscriptionValidation

controller handling the json body of the arrray of single element.

 @Public()
  @HttpCode(200)
  @Post('event')
  async updateEvent(
    @Body() data,
    @Res() res: any,
    @Headers('aeg-event-type') header: string,
  ) {
    console.log('Azure Grid Data ---->', data);

    try {
      // Await the completion of the email event status update

      console.log('Heafer ', header);
      data.forEach((element) => {
        return res
          .status(200)
          .send({ validationResponse: element.data.validationCode });
      });

      // Send a 200 response after all events are processed
    } catch (error) {
      console.error('Error processing events:', error.message);
      return res.status(500).send({ message: 'Failed to process events' });
    }
  }

Bimala Shrestha 5

Hi all,

Me and Bhupendra Khatri are having the below issue.

We are getting the same issue when the server log shows no external API is hit,

meant the webhook was not reaching the endpoint,

The server is responding to status 200 with the response body :

JSONCopy

{     "validationResponse": "F4896D61-8938-41B1-A559-EC869F6E3F29" }

while my JSON body is :

JSONCopy

[   {    "id": "29ac23bd-9331-4186-b51d-9319c84c31b9",     "topic": "/subscriptions/b89a0738-6bf5-496f-b2f6-386f7b9116d3/resourceGroups/communicationservicesfigsflow/providers/microsoft.communication/communicationservices/communicationservicesfigsflow",     "subject": "",     "data": {       "validationCode": "F4896D61-8938-41B1-A559-EC869F6E3F29",       "validationUrl": "https://rp-global.eventgrid.azure.net:553/eventsubscriptions/testemail/validate?id=F4896D61-8938-41B1-A559-EC869F6E3F29&t=2024-11-05T09:43:34.0981666Z&apiVersion=2023-12-15-preview&token=HoOtR2B3sjWbS01f%2fXLzv%2fSOfHgeEif%2fZ5XH0azaou8%3d"    },    "eventType": "Microsoft.EventGrid.SubscriptionValidationEvent",     "eventTime": "2024-11-05T09:43:34.0982159Z",     "metadataVersion": "1",     "dataVersion": "2"   } ]

while sending header : aeg-event-type : SubscriptionValidation

controller handling the json body of the arrray of single element.

JavaScriptCopy

 @Public()   @HttpCode(200)   @Post('event')   async updateEvent(     @Body() data,    @Res() res: any,    @Headers('aeg-event-type') header: string,   ) {    console.log('Azure Grid Data ---->', data);      try {       // Await the completion of the email event status updateconsole.log('Heafer ', header);       data.forEach((element) => {         return res           .status(200)           .send({ validationResponse: element.data.validationCode });       });        // Send a 200 response after all events are processed     } catch (error) {       console.error('Error processing events:', error.message);       return res.status(500).send({ message: 'Failed to process events' });     }   }

Sander van de Velde | MVP 33,231 Reputation points MVP

2024-11-08T11:21:15.7733333+00:00

turned into answer...

1 answer

Sander van de Velde | MVP 33,231 Reputation points MVP

2024-11-08T11:22:38.58+00:00

Hello @Bimala Shrestha ,

welcome to this moderated Azure community forum.

So what I understand from the comments you have a web api and you receive a request coming from an EventGrid Topic destination, type Webhook?

Can you confirm that?

Did you see the 'validationUrl' in the request?

Your endpoint needs to respond on that url so you confirm you are the owner of the api.

I used a webhook in the past and my Azure Function having an EventGridTrigger takes care of this confirmation automatically.

As JananiRamesh-MSFT mentioned, it seem you use a third party service. This one-time validation call needs to be addressed.

If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.
Please sign in to rate this answer.
Bhupendra Khatri 10 Reputation points

2024-11-11T04:41:05.7033333+00:00

Hi Sander,

We ( Bimala and I ) are working closely to resolve the issue, while we are trying to resolve the webhook implementation for the Azure event Grid and we are facing the issue , i have mentioned the issue and response to the server above and yes we are working with the webhook and we couldn't establish the handshake even though our server is responding to the other request but not to the Azure event grid. Details provided by the Bimala and I are the same server's details , feel free to ask in details.

Sander van de Velde | MVP 33,231 Reputation points MVP

2024-11-11T18:13:43.92+00:00

Hello @Bhupendra Khatri ,

Please take some time to learn about the webhook destination with some azure functions created in a development environment.

Once you understand the webhook integration, take that knowledge to the endpoint you try to reach.

It seems you need to be the owner of that endpoint or you know the person managing that endpoint because it seems some extra coding is needed.
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