My app has integration with Gmail API.

I want to see(log) the full original response I got from the Gmail API
to create Gmail stubs.

I use Java and Spring Boot.

For example I want to see response for 401 Unauthorized

Example of what I need:

HTTP/1.1 401 Unauthorized
Content-length: 75
X-xss-protection: 0
X-content-type-options: nosniff
Transfer-encoding: chunked
Expires: Mon, 01 Jan 1990 00:00:00 GMT
Vary: Origin, X-Origin, Referer
Server: scaffolding on HTTPServer2
-content-encoding: gzip
Pragma: no-cache
Cache-control: no-cache, no-store, max-age=0, must-revalidate
Date: Wed, 21 Oct 2020 07:53:18 GMT
X-frame-options: SAMEORIGIN
Alt-svc: h3-Q050=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-T050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
Content-type: application/json; charset=utf-8
{
  "error_description": "Unauthorized", 
  "error": "unauthorized_client"
}

I tried to find what I needed with debug and was partly successful. But didn’t manage to find where the content of the original body is located.

Instead of "error_description": "Unauthorized" like in response I only found in code "statusMessage" "Unauthorized"