BadRequest at hasattr(request, 'json')

[hr-sales]

Hi guys, yesterday i notice that getting or verifying 'json' in request object, an exception (BadRequest) raise

For getattr(request, 'json') or even hasattr(request, 'json') I got:

{BadRequest}400 Bad Request: The browser (or proxy) sent a request that this server could not understand.

Someone can help me to understand? Thanks

Environment:

• Python version: 3.7, 3.9
• Flask version: Latest (2.1.0)

[davidism]

hasattr is actually just a getattr that returns True or False based on if an AttributeError is raised. So when you do hasattr, you're still executing request.json, which is a property that executes request.get_json.

In pallets/werkzeug#2355, accessing json now raises a 400 error instead of returning None if the request is not well formed. You can use silent=True to make it return None instead, or you can use request.is_json instead to check if the request has a JSON content type before trying to decode the data.

[hr-sales]

Thanks!