Is there a way to modify response body in fairing?

[3olkin]

I'm writing JSON api with authorization and I have to refresh jwt tokens on each request and sent them back with response, so I'd like to have a fairing which will do it. Or should this part of application logic be handled by Responder?

[zemelLeong]

https://rocket.rs/v0.5-rc/guide/fairings/#fairings