//========================================================================
//$Id: MsieSslRule.java 966 2008-04-17 13:53:44Z gregw $
//Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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.mortbay.jetty.handler.rewrite;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.mortbay.jetty.HttpHeaderValues;
import org.mortbay.jetty.HttpHeaders;
import org.mortbay.util.StringMap;
/**
* MSIE (Microsoft Internet Explorer) SSL Rule.
* Disable keep alive for SSL from IE5 or IE6 on Windows 2000.
*
* @author gregw
*
*/
public class MsieSslRule extends Rule
{
private static final int IEv5 = '5';
private static final int IEv6 = '6';
private static StringMap __IE6_BadOS = new StringMap();
{
__IE6_BadOS.put("NT 5.01", Boolean.TRUE);
__IE6_BadOS.put("NT 5.0",Boolean.TRUE);
__IE6_BadOS.put("NT 4.0",Boolean.TRUE);
__IE6_BadOS.put("98",Boolean.TRUE);
__IE6_BadOS.put("98; Win 9x 4.90",Boolean.TRUE);
__IE6_BadOS.put("95",Boolean.TRUE);
__IE6_BadOS.put("CE",Boolean.TRUE);
}
public MsieSslRule()
{
_handling = false;
_terminating = false;
}
public String matchAndApply(String target, HttpServletRequest request, HttpServletResponse response) throws IOException
{
if (request.isSecure())
{
String user_agent = request.getHeader(HttpHeaders.USER_AGENT);
if (user_agent!=null)
{
int msie=user_agent.indexOf("MSIE");
if (msie>0 && user_agent.length()-msie>5)
{
// Get Internet Explorer Version
int ieVersion = user_agent.charAt(msie+5);
if ( ieVersion<=IEv5)
{
response.setHeader(HttpHeaders.CONNECTION, HttpHeaderValues.CLOSE);
return target;
}
if (ieVersion==IEv6)
{
int windows = user_agent.indexOf("Windows",msie+5);
if (windows>0)
{
int end=user_agent.indexOf(')',windows+8);
if(end<0 || __IE6_BadOS.getEntry(user_agent,windows+8,end-windows-8)!=null)
{
response.setHeader(HttpHeaders.CONNECTION, HttpHeaderValues.CLOSE);
return target;
}
}
}
}
}
}
return null;
}
}