How can I extract JSON objects from calloutResponse.content by using EV policy?

[suchansinee]

I use service callout to call API for get data and this example of data.

after that, I use EV policy to extract calloutResponse.content.ApiKey keeps in data1 variable.

after that, I set the data1 variable in the header.

I debug calloutResponse.content but It doesn't have any data.

data1 variable doesn't have value.

How can I extract JSON objects from calloutResponse.content by using EV policy?

Thank you. 

@dchiesa1

@dknezic 

[ganadurai]

Please checkout this sample and the ParseJsonResponse policy
https://github.com/apigee/api-platform-samples/tree/master/learn-edge/service-callout-1
https://github.com/apigee/api-platform-samples/blob/master/learn-edge/service-callout-1/apiproxy/pol...

Since you are indicating the response from ServiceCallout is blank, I would make the callout endpoint request from Postman/curl to confirm there is no issue with the endpoint irrespective of the calling source. 

Thanks

Thanks