/*
* Copyright 2000-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jetspeed.util.rewriter;
// java.io
import java.io.Reader;
// java.net
import java.net.MalformedURLException;
import java.net.URL;
// this makes it dependent on Swing...need an abstraction WTP
import javax.swing.text.html.HTML;
import javax.swing.text.MutableAttributeSet;
/**
*
* Basic Rewriter for rewriting HTML content.
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: HTMLRewriter.java,v 1.6 2004/02/23 03:18:59 jford Exp $
*
*/
public class HTMLRewriter implements Rewriter
{
/*
* Construct a basic HTML Rewriter
*
*/
public HTMLRewriter()
{
}
protected String baseURL = null;
/*
* This callback is called by the HTMLParserAdaptor implementation to write
* back all rewritten URLs to point to the proxy server.
* Given the targetURL, rewrites the link as a link back to the proxy server.
*
* @return the rewritten URL to the proxy server.
*
*/
public String generateNewUrl( String targetURL, HTML.Tag tag, HTML.Attribute attribute)
{
String fullPath = "";
try
{
if (baseURL != null)
{
URL full = new URL(new URL(baseURL), targetURL);
fullPath = full.toString();
}
else
{
return targetURL; // leave as is
}
}
catch (Exception e)
{
System.err.println(e);
}
return fullPath;
}
/*
* Returns true if all rewritten URLs should be sent back to the proxy server.
*
* @return true if all URLs are rewritten back to proxy server.
*/
public boolean proxyAllTags()
{
return true; //false;
}
public String rewrite(Reader input, String baseURL)
throws MalformedURLException
{
String rewrittenHTML = "";
this.baseURL = baseURL;
HTMLParserAdaptor parser = new SwingParserAdaptor(this);
rewrittenHTML = parser.run(input);
return rewrittenHTML;
}
/*
* Simple Tag Events
*/
public boolean enterSimpleTagEvent(HTML.Tag tag, MutableAttributeSet attrs)
{
return true;
}
public String exitSimpleTagEvent(HTML.Tag tag, MutableAttributeSet attrs)
{
return null;
}
/*
* Start Tag Events
*/
public boolean enterStartTagEvent(HTML.Tag tag, MutableAttributeSet attrs)
{
return true;
}
public String exitStartTagEvent(HTML.Tag tag, MutableAttributeSet attrs)
{
return null;
}
/*
* Exit Tag Events
*/
public boolean enterEndTagEvent(HTML.Tag tag)
{
return true;
}
public String exitEndTagEvent(HTML.Tag tag)
{
return null;
}
/*
* Text Event
*/
public boolean enterText(char[] values, int param)
{
return true;
}
/*
* Convert Tag Events
*/
public void convertTagEvent(HTML.Tag tag, MutableAttributeSet attrs)
{
}
}