[LOGBACK-1688] Fix request log on Jetty 10.0.x

logback-access/src/main/java/ch/qos/logback/access/jetty/JettyModernServerAdapter.java

@@ -13,6 +13,8 @@
  */
 package ch.qos.logback.access.jetty;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
@@ -30,7 +32,15 @@
  * @author Joakim Erdfelt
  */
 public class JettyModernServerAdapter extends JettyServerAdapter {
+    private static final Method RESPONSE_GET_HTTP_FIELDS;
 
+    static {
+        try {
+            RESPONSE_GET_HTTP_FIELDS = Response.class.getDeclaredMethod("getHttpFields");
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        }
+    }
 
     public JettyModernServerAdapter(Request jettyRequest, Response jettyResponse) {
         super(jettyRequest, jettyResponse);
@@ -52,9 +62,16 @@ public long getRequestTimestamp() {
     }
 
     @Override
+    @SuppressWarnings("unchecked")
     public Map<String, String> buildResponseHeaderMap() {
         Map<String, String> responseHeaderMap = new HashMap<String, String>();
-        Iterator<HttpField> httpFieldIter = response.getHttpFields().iterator();
+        Iterable<HttpField> httpFields;
+        try {
+            httpFields = (Iterable<HttpField>) RESPONSE_GET_HTTP_FIELDS.invoke(response);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+        Iterator<HttpField> httpFieldIter = httpFields.iterator();
         while (httpFieldIter.hasNext()) {
             HttpField httpField = httpFieldIter.next();
             String key = httpField.getName();

logback-access/src/main/java/ch/qos/logback/access/jetty/RequestLogImpl.java

@@ -15,6 +15,7 @@
 
 import java.io.File;
 import java.net.URL;
+import java.util.EventListener;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -65,6 +66,14 @@
  * even bad requests, and context-less requests.
  * </p>
  * <p>
+ * <b>Note:</b>
+ * Jetty 9.4.x and Jetty 10.0.x don't have equal method signatures for all methods. E.g. the return type for
+ * {@code Response#getHttpFields()} changed from {@code HttpFields} to {@code HttpFields.Mutable}.
+ * To properly support Jetty 9.4.x and Jetty 10.0.x reflection is used to resolve the correct method.
+ * If this is too slow for an application, the {@link #makeJettyServerAdapter(Request, Response)} method can be used
+ * to override the {@link JettyServerAdapter} implementation.
+ * </p>
+ * <p>
  * The internals of the Jetty Request and Response objects track the state of the object at the time
  * they are committed (the actual state during the application when an action on the network commits the
  * request/response exchange).  This prevents behaviors from 3rd party libraries
@@ -244,7 +253,7 @@ enum State {
     String resource;
 
     // Jetty 9.4.x and newer is considered modern.
-    boolean modernJettyRequestLog;
+    protected boolean modernJettyRequestLog;
     boolean quiet = false;
 
     public RequestLogImpl() {
@@ -269,7 +278,7 @@ public void log(Request jettyRequest, Response jettyResponse) {
         aai.appendLoopOnAppenders(accessEvent);
     }
 
-    private JettyServerAdapter makeJettyServerAdapter(Request jettyRequest, Response jettyResponse) {
+    protected JettyServerAdapter makeJettyServerAdapter(Request jettyRequest, Response jettyResponse) {
         if (modernJettyRequestLog) {
             return new JettyModernServerAdapter(jettyRequest, jettyResponse);
         } else {
@@ -467,13 +476,21 @@ public FilterReply getFilterChainDecision(IAccessEvent event) {
     }
 
 
-    @Override
     public void addLifeCycleListener(LifeCycle.Listener listener) {
         // we'll implement this when asked
     }
 
-    @Override
     public void removeLifeCycleListener(LifeCycle.Listener listener) {
         // we'll implement this when asked
     }
+
+    public boolean addEventListener(EventListener eventListener) {
+        // we'll implement this when asked
+        return false;
+    }
+
+    public boolean removeEventListener(EventListener eventListener) {
+        // we'll implement this when asked
+        return false;
+    }
 }

logback-access/src/test/java/ch/qos/logback/access/jetty/JettyBasicTest.java

@@ -83,6 +83,7 @@ public void eventGoesToAppenders() throws Exception {
 
         assertEquals("127.0.0.1", event.getRemoteHost());
         assertEquals("localhost", event.getServerName());
+        assertEquals("text/plain;charset=utf-8", event.getResponseHeader("Content-Type"));
         listAppender.list.clear();
     }