P3PConfigFilter.java example

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umt-master
/*
 * Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 * 
 * This file is part of Duckling project.
 *
 * Licensed 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 cn.vlabs.umt.ui.servlet.filters;

import java.io.IOException;

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.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

public class P3PConfigFilter implements Filter {
	private String p3p;
	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse resp, FilterChain chain) throws IOException,
			ServletException {
		if(resp instanceof HttpServletResponse){
			HttpServletResponse re = (HttpServletResponse)resp;
			String s = p3p;
			if(StringUtils.isEmpty(s)){
				s = "CP=\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\"";
			}
			re.setHeader("P3P",s);
		}
		chain.doFilter(request, resp);
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		p3p=config.getInitParameter("p3pConfig");
	}

}