Log requests and responses

RestTemplateConfig.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.web.client.RestTemplateCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.BufferingClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;

@Configuration
public class RestTemplateConfig {

    @Bean
    LoggingInterceptor loggingInterceptor() {
        return new LoggingInterceptor();
    }

    @Bean
    RestTemplateCustomizer restTemplateCustomizer() {
        return restTemplate -> {
            ClientHttpRequestFactory requestFactory = restTemplate.getRequestFactory();
            restTemplate.setRequestFactory(new BufferingClientHttpRequestFactory(requestFactory));
            List<ClientHttpRequestInterceptor> interceptors = restTemplate.getInterceptors();
            interceptors.add(loggingInterceptor());
            restTemplate.setInterceptors(interceptors);
        };

    }

    static class LoggingInterceptor implements ClientHttpRequestInterceptor {
        private static final Logger LOG = LoggerFactory.getLogger(LoggingInterceptor.class);

        @Override
        public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
                throws IOException {
            traceRequest(request, body);
            ClientHttpResponse response = execution.execute(request, body);
            traceResponse(response);
            return response;
        }

        private static void traceRequest(HttpRequest request, byte[] body) {
            LOG.info("===========================request begin=============================================");
            LOG.debug("URI    : {}", request.getURI());
            LOG.debug("Method : {}", request.getMethod());
            LOG.debug("Headers: {}", request.getHeaders());
            LOG.debug("Body   : {}", new String(body, StandardCharsets.UTF_8));
            LOG.info("===========================request end===============================================");
        }

        private static void traceResponse(ClientHttpResponse response) throws IOException {
            StringBuilder inputStringBuilder = new StringBuilder();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getBody(),
                    StandardCharsets.UTF_8));
            String line = bufferedReader.readLine();
            while (line != null) {
                inputStringBuilder.append(line);
                inputStringBuilder.append('\n');
                line = bufferedReader.readLine();
            }
            LOG.info("==========================response begin=============================================");
            LOG.debug("Code   : {}", response.getStatusCode());
            LOG.debug("Text   : {}", response.getStatusText());
            LOG.debug("Headers: {}", response.getHeaders());
            LOG.debug("Body   : {}", inputStringBuilder.toString());
            LOG.info("==========================response end===============================================");
        }
    }
}