GitHub incoming Webhook yields 406 response

[mwolff-fn]

Description

I am trying to get incoming GitHub webhooks to work with a Packeton instance. For this, I have tried the following steps:

• Copy the webhook URL https://packagist.mydomain.tld/api/github?token=mytoken from the "GitHub Service Hook" section of https://packagist.mydomain.tld/about#how-to-update-packages
• Go to my repository's settings page and add a Webhook with above URL as "Payload URL"
  • Choose application/json as Content-Type (also tried form-encoded though, no difference)
  • Left "Secret" blank
  • Enable SSL Verification: On
  • Tick several boxes for events as well as "Active"
  • Save by clicking "Update Webhook"
• Check the delivery status of the test payload

No matter what payload format I choose, the webhook endpoint will always respond with HTTP code 406 and this request body:

{"status":"error","message":"Missing or invalid payload"}

Instead of defining the webhook on an individual repository, I have also tried a global webhook attached to the organization - again, no difference.

Am I missing something?

Can you reproduce the bug on the Packeton demo site?

Not applicable

Database

SQLite

Screenshots

No response

How are you running Packeton?

Packeton is installed manually (git clone) and is running in a custom Docker container within a Nomad cluster. Webserver is Apache w/ mod_php.