If you want to see HTTP traffic between your Micronaut HTTP client and servers you can easily enable logging in logback.xml

src/main/resources/logback.xml

    
        
            %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
        
    

    
        
    

    

 With this log level you will see both headers and body for HTTP requests and responses. See example below.

14:32:18.251 [nioEventLoopGroup-1-3] DEBUG i.m.http.client.DefaultHttpClient - Sending HTTP Request: POST /login
14:32:18.251 [nioEventLoopGroup-1-3] DEBUG i.m.http.client.DefaultHttpClient - Chosen Server: localhost(9005)
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - host: localhost:9005
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - connection: close
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - content-type: application/json
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - content-length: 79
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Request Body
14:32:18.253 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----
14:32:18.254 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - {"username":"user","password":"password","identity":"user","secret":"password"}
14:32:18.254 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----
14:32:18.676 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - HTTP Client Response Received for Request: POST /login
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Status Code: 200 OK
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Date: Fri, 16 Nov 2018 14:32:18 GMT
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - content-type: application/json
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - content-length: 567
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - connection: close
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Response Body
14:32:18.677 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----
14:32:18.678 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - {"username":"user","roles":["ROLE_USER"],"access_token":"eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2Vy...","expires_in":3600,"token_type":"Bearer"}
14:32:18.678 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----