Message:
The following issue has been resolved as FIXED.
Resolver: fabrizio giustina
Date: Sat, 1 Jan 2005 10:26 AM
added back in 1.0. I still was unable to see it working on my configuration,
but since you are reporting it as working I am leaving it in an experimental
state into the distribution. No working unit test also, please let me know if
you are able to provide one.
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View the issue:
http://jira.codehaus.org/browse/DISPL-30
Here is an overview of the issue:
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Key: DISPL-30
Summary: Spring Interceptor for use with servlet 2.2 containers
Type: New Feature
Status: Resolved
Priority: Minor
Resolution: FIXED
Original Estimate: Unknown
Time Spent: 1 day
Remaining: Unknown
Project: DisplayTag
Components:
Export
Fix Fors:
1.0
Versions:
1.0 RC1
Assignee: fabrizio giustina
Reporter: fabrizio giustina
Created: Sat, 2 Oct 2004 4:13 AM
Updated: Sat, 1 Jan 2005 10:26 AM
Description:
Se http://forum.springframework.org/viewtopic.php?t=1004 and displaytag-user
mailing list
Boyce, Keith Garry
I developed an interceptor to use instead of responseOverrideFilter for use in
Servlet 2.2 containers with ServletWrapperController (posted on jira). Please
give me credit in javadoc if you decide to use it. Here is the code:
Code:
/*
* DisplayTagInterceptor.java
*
* Copyright 2004 by Electronic Data Systems
* Corporation. All rights reserved.
*
* An unpublished work created Sep 26, 2004, 2004. This work is a
* trade secret of EDS and unauthorized use or copying
* is prohibited.
*
*/
package org.springframework.web.servlet.mvc;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.displaytag.filter.BufferedResponseWrapper;
import org.displaytag.tags.TableTag;
import org.displaytag.tags.TableTagParameters;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.HandlerAdapter;
/**
* @author jztb88
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class DisplayTagInterceptor implements HandlerInterceptor {
final static Log log = LogFactory.getLog(DisplayTagInterceptor.class);
/* (non-Javadoc)
* @see
org.springframework.web.servlet.HandlerInterceptor#preHandle(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse, java.lang.Object)
*/
public boolean preHandle(HttpServletRequest servletRequest,
HttpServletResponse servletResponse, Object handler) throws Exception {
if (servletRequest.getParameter(TableTagParameters.PARAMETER_EXPORTING)
== null)
{
if (log.isDebugEnabled())
{
log.debug("Filter has been called, but PARAMETER_EXPORTING
parameter has not been found.");
}
return true;
}
HttpServletRequest request = (HttpServletRequest) servletRequest;
BufferedResponseWrapper wrapper = new
BufferedResponseWrapper((HttpServletResponse) servletResponse);
// In a portlet environment, you do not have direct access to the
actual request object, so any attribute that
// is added will not be visible outside of your portlet. So instead,
users MUST append to the StringBuffer, so
// that the portlets do not have to bind a new attribute to the request.
request.setAttribute(TableTag.FILTER_CONTENT_OVERRIDE_BODY, new
StringBuffer(8096));
request.setAttribute(TableTag.FILTER_CONTENT_OVERRIDE_TYPE, new
StringBuffer(80));
request.setAttribute(TableTag.FILTER_CONTENT_OVERRIDE_FILENAME, new
StringBuffer(80));
HandlerAdapter handlerAdaptor = new SimpleControllerHandlerAdapter();
handlerAdaptor.handle(request,wrapper,handler);
String pageContent;
String contentType;
StringBuffer buf = (StringBuffer)
request.getAttribute(TableTag.FILTER_CONTENT_OVERRIDE_BODY);
HttpServletResponse resp = (HttpServletResponse) servletResponse;
String characterEncoding = resp.getCharacterEncoding();
if (characterEncoding != null)
{
characterEncoding = "; charset=" + characterEncoding;
}
if (buf != null && buf.length() > 0)
{
pageContent = buf.toString();
contentType =
ObjectUtils.toString(request.getAttribute(TableTag.FILTER_CONTENT_OVERRIDE_TYPE));
if (log.isDebugEnabled())
{
log.debug("Overriding output, writing new output with content
type " + contentType);
}
StringBuffer filename = (StringBuffer)
request.getAttribute(TableTag.FILTER_CONTENT_OVERRIDE_FILENAME);
if (filename != null && StringUtils.isNotEmpty(filename.toString()))
{
if (log.isDebugEnabled())
{
log.debug("Filename specified as " + filename);
}
resp.setHeader("Content-Disposition", "attachment; filename=\""
+ filename + "\"");
}
}
else
{
log.debug("NOT overriding input. ");
pageContent = wrapper.toString();
contentType = wrapper.getContentType();
}
if (contentType != null)
{
if (contentType.indexOf("charset") > -1)
{
// charset is already specified (see #921811)
servletResponse.setContentType(contentType);
}
else
{
servletResponse.setContentType(contentType +
StringUtils.defaultString(characterEncoding));
}
}
servletResponse.setContentLength(pageContent.length());
PrintWriter out = servletResponse.getWriter();
out.write(pageContent);
out.close();
return false;
}
/* (non-Javadoc)
* @see
org.springframework.web.servlet.HandlerInterceptor#postHandle(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse, java.lang.Object,
org.springframework.web.servlet.ModelAndView)
*/
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2, ModelAndView arg3) throws Exception {
// Nothing to do
}
/* (non-Javadoc)
* @see
org.springframework.web.servlet.HandlerInterceptor#afterCompletion(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse, java.lang.Object, java.lang.Exception)
*/
public void afterCompletion(HttpServletRequest arg0, HttpServletResponse
arg1, Object arg2, Exception arg3) throws Exception {
// Nothing to do
}
}
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