/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Sam
*/
package com.caucho.server.rewrite;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Pattern;
import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.caucho.i18n.CharacterEncoding;
import com.caucho.server.http.Form;
import com.caucho.util.HashMapImpl;
import com.caucho.vfs.Encoding;
/**
* A rewrite condition that passes if the value of a query parameter exists
* and matches a regular expression.
*/
public class QueryParamCondition
extends AbstractCondition
{
private static final Logger log
= Logger.getLogger(QueryParamCondition.class.getName());
private final String _param;
private Pattern _regexp;
private boolean _caseInsensitive;
QueryParamCondition(String param)
{
_param = param;
}
public String getTagName()
{
return "query-param";
}
public void setRegexp(Pattern pattern)
{
_regexp = pattern;
}
public void setCaseInsensitive(boolean caseInsensitive)
{
_caseInsensitive = caseInsensitive;
}
@PostConstruct
public void init()
{
if (_regexp != null && _caseInsensitive)
_regexp = Pattern.compile(_regexp.pattern(), Pattern.CASE_INSENSITIVE);
}
public boolean isMatch(HttpServletRequest request,
HttpServletResponse response)
{
String query = request.getQueryString();
if (query == null)
return false;
String charEncoding = request.getCharacterEncoding();
if (charEncoding == null)
charEncoding = CharacterEncoding.getLocalEncoding();
String javaEncoding = Encoding.getJavaName(charEncoding);
Form formParser = new Form();
HashMapImpl<String,String[]> form = new HashMapImpl<String,String[]>();
try {
formParser.parseQueryString(form, query, javaEncoding, true);
} catch (java.io.IOException e) {
log.log(Level.FINE, e.toString(), e);
return false;
}
String []value = form.get(_param);
if (value == null || value.length == 0)
return false;
else
return _regexp == null || _regexp.matcher(value[0]).find();
}
}