com.envision.envservice.filter.CertificateFilter.java Source code

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Here is the source code for com.envision.envservice.filter.CertificateFilter.java

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/******************************************************************************
 * @File name   :      CertificateFilter.java
 *
 * @Package    :      com.envision.envservice.filter
 *
 * @Author      :      guowei.wang
 *
 * @Date        :      2015-10-27 ?1:57:45
 *
 * @Description :       
 *
 * @Copyright Notice: 
 * Copyright (c) 2015 Envision, Inc. All  Rights Reserved.
 * This software is published under the terms of the Envision Software
 * License version 1.0, a copy of which has been included with this
 * distribution in the LICENSE.txt file.
 * 
 * 
 * ----------------------------------------------------------------------------
 * Date                         Who         Version        Comments
 * 2015-10-27 ?1:57:45             guowei.wang     1.0            Initial Version
 *****************************************************************************/
package com.envision.envservice.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.MediaType;

import org.apache.http.HttpStatus;

import com.envision.envservice.common.Code;
import com.envision.envservice.common.Constants;
import com.envision.envservice.common.FailResult;

/**
 * 
 * 
 * @ClassName CertificateFilter
 * @author guowei.wang
 * @date 2015-10-27
 */
public class CertificateFilter implements Filter {

    private ServletContext servletContext;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        servletContext = filterConfig.getServletContext();
    }

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        if (verifyCertificate()) {
            chain.doFilter(request, response);
        } else {
            response.setStatus(HttpStatus.SC_UNAUTHORIZED);
            response.setContentType(MediaType.APPLICATION_JSON);
            response.getWriter().print(FailResult.toJson(Code.NO_CERTIFICATE, ""));
        }
    }

    private boolean verifyCertificate() {
        return servletContext.getAttribute(Constants.SYS_CERTIFICATE) != null;
    }
}