1 files changed, 75 insertions, 0 deletions
diff --git a/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java b/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java
new file mode 100644
index 0000000000..08ca5922d3
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+++ b/jetty-client/src/main/java/org/eclipse/jetty/client/CachedExchange.java
@@ -0,0 +1,75 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.client;
+
+import java.io.IOException;
+
+import org.eclipse.jetty.http.HttpFields;
+import org.eclipse.jetty.io.Buffer;
+
+/**
+ * An exchange that retains response status and response headers for later use.
+ */
+public class CachedExchange extends HttpExchange
+{
+    private final HttpFields _responseFields;
+    private volatile int _responseStatus;
+
+    /**
+     * Creates a new CachedExchange.
+     *
+     * @param cacheHeaders true to cache response headers, false to not cache them
+     */
+    public CachedExchange(boolean cacheHeaders)
+    {
+        _responseFields = cacheHeaders ? new HttpFields() : null;
+    }
+
+    public synchronized int getResponseStatus()
+    {
+        if (getStatus() < HttpExchange.STATUS_PARSING_HEADERS)
+            throw new IllegalStateException("Response not received yet");
+        return _responseStatus;
+    }
+
+    public synchronized HttpFields getResponseFields()
+    {
+        if (getStatus() < HttpExchange.STATUS_PARSING_CONTENT)
+            throw new IllegalStateException("Headers not completely received yet");
+        return _responseFields;
+    }
+
+    @Override
+    protected synchronized void onResponseStatus(Buffer version, int status, Buffer reason) throws IOException
+    {
+        _responseStatus = status;
+        super.onResponseStatus(version, status, reason);
+    }
+
+    @Override
+    protected synchronized void onResponseHeader(Buffer name, Buffer value) throws IOException
+    {
+        if (_responseFields != null)
+        {
+            _responseFields.add(name, value.asImmutableBuffer());
+        }
+        
+        super.onResponseHeader(name, value);
+    }
+}