Is there a way to validate a payload in emqx?

[tulio84z]

I want to know if there is any way to validate a payload before it was published to a topic in emqx. I cant find anything in the docs. The rules engine looked promising for this purpose at first but i dont think it fits as neetly as i would it to be.

Thank you in advance for any clarification

[ieQu1]

I don't think rule engine can prevent messages from being routed by the broker. However, such filtering can be done by a custom plugin: plugins can hook into various broker flows and they can access all message fields, including the payload. Dropping messages based on the payload can be done in a similar way the authorization plugins check client permissions.

[id]

Message validation EIP will be implemented in the upcoming 5.7.0 release. It will be an Enterprise edition feature.