Unrecognised and converted body to json

[Jef-Z]

Environment information

Version:

"dependencies": {
  "body-parser": "2.2.0",
  "express": "5.1.0",
}

Platform:

Linux： WSL： Linux 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun 5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Windows: Microsoft Windows NT 10.0.19045.0 x64

Node.js version:
v20.11.1

Any other relevant information:

const app: Express = express();

app.disable('x-powered-by');

// app.use(express.json());
app.use(bodyParser.json());

app.use('/webhook/after', (req, res) => {
  console.log('zjf---after-:', req.body);   // here!!!
  console.log('zjf---after-:', req.query);
  console.log('zjf---after-:', req.headers);
  console.log('zjf---after-:', req.method);

  try {
    if (Buffer.isBuffer(req.body)) {
      const jsonString = req.body.toString('utf-8');

      const data = JSON.parse(jsonString);

      console.log('zjf---after-req.body:', data);
    }
  } catch (error) {}

  res.status(200).send('OK');
});

Running in a container where the base image is almalinux.

Test it use Curl:

curl --location '${host}/webhook/after' \
--header 'content-type: application/json;charset=utf-8' \
--data '{
    "challenge": "ajls384kdjxxxx"
}'

Result:

I am running locally and Docker is parsing it properly. I can't get you to reproduce our release environment and cloud function environment.
But please help to check what could be wrong.
thanks a lot.