/*
* Copyright 2010 The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.hadoop.hbase.rest.filter;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class GzipFilter implements Filter {
private Set<String> mimeTypes = new HashSet<String>();
@Override
public void init(FilterConfig filterConfig) throws ServletException {
String s = filterConfig.getInitParameter("mimeTypes");
if (s != null) {
StringTokenizer tok = new StringTokenizer(s, ",", false);
while (tok.hasMoreTokens()) {
mimeTypes.add(tok.nextToken());
}
}
}
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest req, ServletResponse rsp,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest)req;
HttpServletResponse response = (HttpServletResponse)rsp;
String contentEncoding = request.getHeader("content-encoding");
String acceptEncoding = request.getHeader("accept-encoding");
String contentType = request.getHeader("content-type");
if ((contentEncoding != null) &&
(contentEncoding.toLowerCase().indexOf("gzip") > -1)) {
request = new GZIPRequestWrapper(request);
}
if (((acceptEncoding != null) &&
(acceptEncoding.toLowerCase().indexOf("gzip") > -1)) ||
((contentType != null) && mimeTypes.contains(contentType))) {
response = new GZIPResponseWrapper(response);
}
chain.doFilter(request, response);
if (response instanceof GZIPResponseWrapper) {
OutputStream os = response.getOutputStream();
if (os instanceof GZIPResponseStream) {
((GZIPResponseStream)os).finish();
}
}
}
}