null json body is considered bad request by ServerRequestInterface?

[nanaya]

1. clone null-json-body test branch
2. run composer install
3. init database with php artisan migrate --force -n
4. start server with php artisan serve
5. on another terminal, confirm the app runs correctly:

   $ curl -H 'Accept: application/json' -H 'Content-Type: application/json' --data '{"hello":"world"}' 127.0.0.1:8000; echo
   {"request":{"hello":"world"}}
   

6. run the same request but the body being null:

   $ curl -H 'Accept: application/json' -H 'Content-Type: application/json' --data 'null' 127.0.0.1:8000; echo
   {
       "message": "Bad request."
   }
   

Why is it returning error? null json body should be a valid request from what I can tell.

(I'm asking this because sentry-laravel is using this specific interface to generate report. it handles the error but it also means an exception is thrown every time such request is made)

[ismlunal]

❤

[bulletproof-coding]

null is not a valid json.

Update: But according to this it is..
https://stackoverflow.com/questions/8526995/is-null-valid-json-4-bytes-nothing-else