org.eclipse.jetty.rewrite.handler.RewriteRegexRule Maven / Gradle / Ivy
// ========================================================================
// Copyright (c) 2004-2009 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.rewrite.handler;
import java.io.IOException;
import java.util.regex.Matcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.server.Request;
/**
* Rewrite the URI by matching with a regular expression.
* The replacement string may use $n" to replace the nth capture group.
*/
public class RewriteRegexRule extends RegexRule implements Rule.ApplyURI
{
private String _replacement;
/* ------------------------------------------------------------ */
public RewriteRegexRule()
{
_handling = false;
_terminating = false;
}
/* ------------------------------------------------------------ */
/**
* Whenever a match is found, it replaces with this value.
*
* @param replacement the replacement string.
*/
public void setReplacement(String replacement)
{
_replacement = replacement;
}
/* ------------------------------------------------------------ */
/* (non-Javadoc)
* @see org.eclipse.jetty.server.handler.rules.RegexRule#apply(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.util.regex.Matcher)
*/
public String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException
{
target=_replacement;
for (int g=1;g<=matcher.groupCount();g++)
{
String group = Matcher.quoteReplacement(matcher.group(g));
target=target.replaceAll("\\$"+g,group);
}
return target;
}
/* ------------------------------------------------------------ */
public void applyURI(Request request, String oldTarget, String newTarget) throws IOException
{
Matcher matcher=_regex.matcher(request.getRequestURI());
boolean matches = matcher.matches();
if (matches)
{
String uri=_replacement;
for (int g=1;g<=matcher.groupCount();g++)
{
String group = Matcher.quoteReplacement(matcher.group(g));
uri=uri.replaceAll("\\$"+g,group);
}
request.setRequestURI(uri);
}
else
request.setRequestURI(newTarget);
}
/* ------------------------------------------------------------ */
/**
* Returns the replacement string.
*/
public String toString()
{
return super.toString()+"["+_replacement+"]";
}
}