/*
 *  Licensed to GraphHopper and Peter Karich under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper licenses this file to you 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 com.graphhopper.http;

import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.eclipse.jetty.servlets.GzipFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Just to check if response is really gzipped
 * <p/>
 * @author Peter Karich
 */
public class GHGZIPHook extends GzipFilter
{
    private Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public void doFilter( ServletRequest req, ServletResponse res, FilterChain chain ) throws IOException, ServletException
    {
        // logger.info("NOW " + req.getParameterMap().toString() + ", filter:" + chain);
        // if response contains "Content-Encoding" => do not filter
        super.doFilter(req, res, chain);
    }
}
