Response Transformer

What is the purpose of Response-Transformer?

Response Transformer is used to transform the response sent by the upstream server on the fly before returning the response to the client.

How are you able to enhance/customise your header?

You are able to do so by applying this yaml below into your own namespace:

apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
  name: response-transformer-example
config: 
  remove:
    headers:
    - x-toremove
    - x-another-one
  remove:
    json:
    - json-key-toremove
    - another-json-key
  add:
    headers:
    - x-new-header:value
    - x-another-header:something
  add:
    json:
    - new-json-key:some_value
    - another-json-key:some_value
  add:
    json_types:
    - new-json-key:string
    - another-json-key:boolean
    - another-json-key:number
  append:
    headers:
    - x-existing-header:some_value
    - x-another-header:some_value
plugin: response-transformerCopy to clipboardErrorCopied

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata: 
  name: <your_ingress_name>
  namespace: <your_namespace>
  annotations:
    konghq.com/plugins: response-transformer-example
.
spec:
  ingressClassName: kong
.
. #rest of your yaml
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Things to take note of

The sequence flow of this yaml being applied is remove –> rename –> replace –> add –> append. Do note that if there is an existing header, add.headers does not work. You have to use append.headers instead.

To understand more about response transformer, you can visit https://docs.konghq.com/hub/kong-inc/response-transformer.