Customize Envoy access logging command operator (C++)

Job ID: 32254413

Budget: $10 – $30 USD

I would like to customize some Envoy access logging command operators such as REQ(X?Y):Z, %DOWNSTREAM_REMOTE_ADDRESS_WITHOUT_PORT% etc. What I need to do is add a tag before and after the operator such as: %(tag)DOWNSTREAM_REMOTE_ADDRESS_WITHOUT_PORT(/tag)%

Please feel free to ask questions.