Added request/response logging interceptor

Author: nilandev

spring-interceptor/src/main/java/com/stacktips/interceptors/LogHandlerInterceptor.java

@@ -3,15 +3,23 @@
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatusCode;
 import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.ModelAndView;
 
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.Collectors;
+
 @Slf4j
 public class LogHandlerInterceptor implements HandlerInterceptor {
 
     @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         log.info("LogHandlerInterceptor::preHandle()");
+        logRequestDetails(request);
         return true;
     }
 
@@ -23,5 +31,34 @@ public void postHandle(HttpServletRequest request, HttpServletResponse response,
     @Override
     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
         log.info("LogHandlerInterceptor::afterCompletion()");
+        logResponseDetails(response);
+    }
+
+
+    private void logRequestDetails(HttpServletRequest request) {
+        log.info("Request: {}: {}", request.getMethod(), request.getRequestURL());
+        Enumeration<String> headerNames = request.getHeaderNames();
+        Map<String, String> headers = new HashMap<>();
+        while (headerNames.hasMoreElements()) {
+            String headerName = headerNames.nextElement();
+            headers.put(headerName, request.getHeader(headerName));
+        }
+        log.info("Request headers: {}", headers);
+
+        try {
+            String body = request.getReader().lines().collect(Collectors.joining(System.lineSeparator()));
+            log.info("Request body: {}", body);
+        } catch (IOException e) {
+            log.error("Error reading the request body: ", e);
+        }
+    }
+
+    private void logResponseDetails(HttpServletResponse response) {
+        log.info("Response: {}", HttpStatusCode.valueOf(response.getStatus()));
+        Map<String, String> headers = new HashMap<>();
+        for (String headerName : response.getHeaderNames()) {
+            headers.put(headerName, response.getHeader(headerName));
+        }
+        log.info("Response headers: {}", headers);
     }
 }