APIGEE API proxy not picking up the `if-none-match` attribute from headers

[AasthaTalwaria]

Hi,

I wanted to implement ETag in one of the APIs in my API proxy. I figured out the integration of ETag in the base service. But, unable to get the `if-none-match` key in the headers from APIGEE layer.

On tracing the API from APIGEE, looks like it is not picking the `if-none-match` key (on the first step I didn't see the key in the request headers.)

Please help me with either reading the `if-none-match` key from headers or supporting complete ETag implementation with APIGEE configuration.