Github webhook not posting to Amazon SQS queue due to UnknownOperationException - github

Question

I'm trying to configure a Github repository to post to an Amazon SQS queue, via a webhook (not the pre-configured SQS Service). The queue has full permissions, so anyone can post a message to it - and when I post via curl, it works fine.
curl -d "Action=SendMessage&MessageBody=curl_testing" https://sqs.us-east-1.amazonaws.com/123/my_queue
However, when I use the same queue URL in a webhook and test it, I get a 404, and UnknownOperationException.
The default curl format is form-urlencoded, so I changed the webhook default format (application/json) to that - which made no difference. (Interestingly, I also switched curl to use application/json, and it failed with the same error.)
There aren't a lot of options on the webhook, but I tried them all (with/without a secret token, or SSL certs), with no success.
Is it possible to have a webhook post to SQS (with the expected repo information, such as commits, etc)? And if so, how?

Answer 1

In your curl example you can see that SQS is expecting Action and MessageBody attributes. You can specify them in body of POST request or as the URL parameters. This way it's possible to send notification to SQS queue but you will lost information from webhook which is formatted as JSON.
You can set the action and message body in the webhook Payload URL like this:
https://sqs.us-east-1.amazonaws.com/123/my_queue?Action=SendMessage&MessageBody=Webhook_triggered
This way whenever the webhook is activated, you will receive SQS message with "Webhook_triggered" body.