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A Shaded CQL ActivityType driver for http://nosqlbench.io/
//
// ========================================================================
// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.rewrite.handler;
import java.io.IOException;
import java.util.regex.Matcher;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpURI;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.annotation.Name;
/**
* Rewrite the URI by matching with a regular expression.
* The replacement string may use $n" to replace the nth capture group.
* If the replacement string contains ? character, then it is split into a path
* and query string component. The replacement query string may also contain $Q, which
* is replaced with the original query string.
* The returned target contains only the path.
*/
public class RewriteRegexRule extends RegexRule implements Rule.ApplyURI
{
private String _replacement;
private String _query;
private boolean _queryGroup;
public RewriteRegexRule()
{
this(null, null);
}
public RewriteRegexRule(@Name("regex") String regex, @Name("replacement") String replacement)
{
super(regex);
setHandling(false);
setTerminating(false);
setReplacement(replacement);
}
/**
* Whenever a match is found, it replaces with this value.
*
* @param replacement the replacement string.
*/
public void setReplacement(String replacement)
{
if (replacement == null)
{
_replacement = null;
_query = null;
_queryGroup = false;
}
else
{
String[] split = replacement.split("\\?", 2);
_replacement = split[0];
_query = split.length == 2 ? split[1] : null;
_queryGroup = _query != null && _query.contains("$Q");
}
}
@Override
public String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException
{
target = _replacement;
String query = _query;
for (int g = 1; g <= matcher.groupCount(); g++)
{
String group = matcher.group(g);
if (group == null)
group = "";
else
group = Matcher.quoteReplacement(group);
target = target.replaceAll("\\$" + g, group);
if (query != null)
query = query.replaceAll("\\$" + g, group);
}
if (query != null)
{
if (_queryGroup)
query = query.replace("$Q", request.getQueryString() == null ? "" : request.getQueryString());
request.setAttribute("org.eclipse.jetty.rewrite.handler.RewriteRegexRule.Q", query);
}
return target;
}
@Override
public void applyURI(Request request, String oldURI, String newURI) throws IOException
{
HttpURI baseURI = request.getHttpURI();
if (_query == null)
{
request.setHttpURI(HttpURI.build(baseURI, newURI, baseURI.getParam(), baseURI.getQuery()));
}
else
{
// TODO why isn't _query used?
String query = (String)request.getAttribute("org.eclipse.jetty.rewrite.handler.RewriteRegexRule.Q");
if (!_queryGroup)
query = URIUtil.addQueries(baseURI.getQuery(), query);
request.setHttpURI(HttpURI.build(baseURI, newURI, baseURI.getParam(), query));
}
}
/**
* Returns the replacement string.
*/
@Override
public String toString()
{
return super.toString() + "[" + _replacement + "]";
}
}
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