diff --git a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/PortletRequestDataBinder.java b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/PortletRequestDataBinder.java
index 26c3a5b55fa..a63b894d17c 100644
--- a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/PortletRequestDataBinder.java
+++ b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/bind/PortletRequestDataBinder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@ import org.springframework.beans.MutablePropertyValues;
 import org.springframework.validation.BindException;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.multipart.MultipartRequest;
+import org.springframework.web.portlet.util.PortletUtils;
 
 /**
  * Special {@link org.springframework.validation.DataBinder} to perform data binding
@@ -105,8 +106,8 @@ public class PortletRequestDataBinder extends WebDataBinder {
 	 */
 	public void bind(PortletRequest request) {
 		MutablePropertyValues mpvs = new PortletRequestParameterPropertyValues(request);
-		if (request instanceof MultipartRequest) {
-			MultipartRequest multipartRequest = (MultipartRequest) request;
+		MultipartRequest multipartRequest = PortletUtils.getNativeRequest(request, MultipartRequest.class);
+		if (multipartRequest != null) {
 			bindMultipart(multipartRequest.getMultiFileMap(), mpvs);
 		}
 		doBind(mpvs);
diff --git a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletWebRequest.java b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletWebRequest.java
index 3eedfb651b6..d407f40fa9e 100644
--- a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletWebRequest.java
+++ b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/context/PortletWebRequest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,13 +23,12 @@ import java.util.Map;
 import javax.portlet.PortletRequest;
 import javax.portlet.PortletResponse;
 import javax.portlet.PortletSession;
-import javax.portlet.filter.PortletRequestWrapper;
-import javax.portlet.filter.PortletResponseWrapper;
 
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.portlet.util.PortletUtils;
 
 /**
  * {@link org.springframework.web.context.request.WebRequest} adapter
@@ -79,40 +78,12 @@ public class PortletWebRequest extends PortletRequestAttributes implements Nativ
 
 	@SuppressWarnings("unchecked")
 	public <T> T getNativeRequest(Class<T> requiredType) {
-		if (requiredType != null) {
-			PortletRequest request = getRequest();
-			while (request != null) {
-				if (requiredType.isInstance(request)) {
-					return (T) request;
-				}
-				else if (request instanceof PortletRequestWrapper) {
-					request = ((PortletRequestWrapper) request).getRequest();
-				}
-				else {
-					request = null;
-				}
-			}
-		}
-		return null;
+		return PortletUtils.getNativeRequest(getRequest(), requiredType);
 	}
 
 	@SuppressWarnings("unchecked")
 	public <T> T getNativeResponse(Class<T> requiredType) {
-		if (requiredType != null) {
-			PortletResponse response = getResponse();
-			while (response != null) {
-				if (requiredType.isInstance(response)) {
-					return (T) response;
-				}
-				else if (response instanceof PortletResponseWrapper) {
-					response = ((PortletResponseWrapper) response).getResponse();
-				}
-				else {
-					response = null;
-				}
-			}
-		}
-		return null;
+		return PortletUtils.getNativeResponse(getResponse(), requiredType);
 	}
 
 
diff --git a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/util/PortletUtils.java b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/util/PortletUtils.java
index cd9040b1b54..968229c7538 100644
--- a/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/util/PortletUtils.java
+++ b/org.springframework.web.portlet/src/main/java/org/springframework/web/portlet/util/PortletUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,6 +32,9 @@ import javax.portlet.PortletRequestDispatcher;
 import javax.portlet.PortletSession;
 import javax.portlet.ResourceRequest;
 import javax.portlet.ResourceResponse;
+import javax.portlet.PortletResponse;
+import javax.portlet.filter.PortletRequestWrapper;
+import javax.portlet.filter.PortletResponseWrapper;
 import javax.servlet.http.Cookie;
 
 import org.springframework.util.Assert;
@@ -276,6 +279,48 @@ public abstract class PortletUtils {
 	}
 
 
+	/**
+	 * Return an appropriate request object of the specified type, if available,
+	 * unwrapping the given request as far as necessary.
+	 * @param request the portlet request to introspect
+	 * @param requiredType the desired type of request object
+	 * @return the matching request object, or <code>null</code> if none
+	 * of that type is available
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> T getNativeRequest(PortletRequest request, Class<T> requiredType) {
+		if (requiredType != null) {
+			if (requiredType.isInstance(request)) {
+				return (T) request;
+			}
+			else if (request instanceof PortletRequestWrapper) {
+				return getNativeRequest(((PortletRequestWrapper) request).getRequest(), requiredType);
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Return an appropriate response object of the specified type, if available,
+	 * unwrapping the given response as far as necessary.
+	 * @param response the portlet response to introspect
+	 * @param requiredType the desired type of response object
+	 * @return the matching response object, or <code>null</code> if none
+	 * of that type is available
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> T getNativeResponse(PortletResponse response, Class<T> requiredType) {
+		if (requiredType != null) {
+			if (requiredType.isInstance(response)) {
+				return (T) response;
+			}
+			else if (response instanceof PortletResponseWrapper) {
+				return getNativeResponse(((PortletResponseWrapper) response).getResponse(), requiredType);
+			}
+		}
+		return null;
+	}
+
 	/**
 	 * Expose the given Map as request attributes, using the keys as attribute names
 	 * and the values as corresponding attribute values. Keys must be Strings.
@@ -293,7 +338,7 @@ public abstract class PortletUtils {
 	/**
 	 * Retrieve the first cookie with the given name. Note that multiple
 	 * cookies can have the same name but different paths or domains.
-	 * @param request current servlet request
+	 * @param request current portlet request
 	 * @param name cookie name
 	 * @return the first cookie with the given name, or <code>null</code> if none is found
 	 */
diff --git a/org.springframework.web/src/main/java/org/springframework/web/bind/ServletRequestDataBinder.java b/org.springframework.web/src/main/java/org/springframework/web/bind/ServletRequestDataBinder.java
index 2edc899cfa9..f488024d9b6 100644
--- a/org.springframework.web/src/main/java/org/springframework/web/bind/ServletRequestDataBinder.java
+++ b/org.springframework.web/src/main/java/org/springframework/web/bind/ServletRequestDataBinder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import javax.servlet.ServletRequest;
 import org.springframework.beans.MutablePropertyValues;
 import org.springframework.validation.BindException;
 import org.springframework.web.multipart.MultipartRequest;
+import org.springframework.web.util.WebUtils;
 
 /**
  * Special {@link org.springframework.validation.DataBinder} to perform data binding
@@ -103,8 +104,8 @@ public class ServletRequestDataBinder extends WebDataBinder {
 	 */
 	public void bind(ServletRequest request) {
 		MutablePropertyValues mpvs = new ServletRequestParameterPropertyValues(request);
-		if (request instanceof MultipartRequest) {
-			MultipartRequest multipartRequest = (MultipartRequest) request;
+		MultipartRequest multipartRequest = WebUtils.getNativeRequest(request, MultipartRequest.class);
+		if (multipartRequest != null) {
 			bindMultipart(multipartRequest.getMultiFileMap(), mpvs);
 		}
 		doBind(mpvs);
diff --git a/org.springframework.web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java b/org.springframework.web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
index 1caf21e48db..9cb56566ed1 100644
--- a/org.springframework.web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
+++ b/org.springframework.web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
@@ -20,10 +20,6 @@ import java.security.Principal;
 import java.util.Iterator;
 import java.util.Locale;
 import java.util.Map;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletRequestWrapper;
-import javax.servlet.ServletResponse;
-import javax.servlet.ServletResponseWrapper;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
@@ -31,6 +27,7 @@ import javax.servlet.http.HttpSession;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
+import org.springframework.web.util.WebUtils;
 
 /**
  * {@link WebRequest} adapter for an {@link javax.servlet.http.HttpServletRequest}.
@@ -92,40 +89,12 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
 
 	@SuppressWarnings("unchecked")
 	public <T> T getNativeRequest(Class<T> requiredType) {
-		if (requiredType != null) {
-			ServletRequest request = getRequest();
-			while (request != null) {
-				if (requiredType.isInstance(request)) {
-					return (T) request;
-				}
-				else if (request instanceof ServletRequestWrapper) {
-					request = ((ServletRequestWrapper) request).getRequest();
-				}
-				else {
-					request = null;
-				}
-			}
-		}
-		return null;
+		return WebUtils.getNativeRequest(getRequest(), requiredType);
 	}
 
 	@SuppressWarnings("unchecked")
 	public <T> T getNativeResponse(Class<T> requiredType) {
-		if (requiredType != null) {
-			ServletResponse response = getResponse();
-			while (response != null) {
-				if (requiredType.isInstance(response)) {
-					return (T) response;
-				}
-				else if (response instanceof ServletResponseWrapper) {
-					response = ((ServletResponseWrapper) response).getResponse();
-				}
-				else {
-					response = null;
-				}
-			}
-		}
-		return null;
+		return WebUtils.getNativeResponse(getResponse(), requiredType);
 	}
 
 
diff --git a/org.springframework.web/src/main/java/org/springframework/web/util/WebUtils.java b/org.springframework.web/src/main/java/org/springframework/web/util/WebUtils.java
index c11df93a05f..8e19d709266 100644
--- a/org.springframework.web/src/main/java/org/springframework/web/util/WebUtils.java
+++ b/org.springframework.web/src/main/java/org/springframework/web/util/WebUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2011 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,9 @@ import java.util.Map;
 import java.util.TreeMap;
 import javax.servlet.ServletContext;
 import javax.servlet.ServletRequest;
+import javax.servlet.ServletRequestWrapper;
+import javax.servlet.ServletResponse;
+import javax.servlet.ServletResponseWrapper;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -366,6 +369,48 @@ public abstract class WebUtils {
 	}
 
 
+	/**
+	 * Return an appropriate request object of the specified type, if available,
+	 * unwrapping the given request as far as necessary.
+	 * @param request the servlet request to introspect
+	 * @param requiredType the desired type of request object
+	 * @return the matching request object, or <code>null</code> if none
+	 * of that type is available
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> T getNativeRequest(ServletRequest request, Class<T> requiredType) {
+		if (requiredType != null) {
+			if (requiredType.isInstance(request)) {
+				return (T) request;
+			}
+			else if (request instanceof ServletRequestWrapper) {
+				return getNativeRequest(((ServletRequestWrapper) request).getRequest(), requiredType);
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Return an appropriate response object of the specified type, if available,
+	 * unwrapping the given response as far as necessary.
+	 * @param response the servlet response to introspect
+	 * @param requiredType the desired type of response object
+	 * @return the matching response object, or <code>null</code> if none
+	 * of that type is available
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> T getNativeResponse(ServletResponse response, Class<T> requiredType) {
+		if (requiredType != null) {
+			if (requiredType.isInstance(response)) {
+				return (T) response;
+			}
+			else if (response instanceof ServletResponseWrapper) {
+				return getNativeResponse(((ServletResponseWrapper) response).getResponse(), requiredType);
+			}
+		}
+		return null;
+	}
+
 	/**
 	 * Determine whether the given request is an include request,
 	 * that is, not a top-level HTTP request coming in from the outside.