photark-security/src/main/java/org/apache/photark/security/authentication/AuthorizationFilter.java

/*
 * 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.photark.security.authentication;

import org.apache.photark.security.authorization.AccessList;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.logging.Logger;

import static org.apache.photark.security.utils.Constants.*;

/**
 * Authorization Filter. This will only allow authenticated user
 * to access to upload.html and redirect others to OpenID authentication
 */
public class AuthorizationFilter implements Filter {
    private static final Logger logger = Logger.getLogger(AuthorizationFilter.class.getName());

    private String redirectPage;

    /**
     * Filter should be configured with an redirect page.
     */
    public void init(FilterConfig FilterConfig) throws ServletException {
        if (FilterConfig != null) {
            redirectPage = FilterConfig.getInitParameter("redirect_page");
        }
    }


    public void destroy() {
        // TODO Auto-generated method stub
    }

    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain) throws ServletException, IOException {

        HttpServletRequest httpReq = (HttpServletRequest) request;
        HttpServletResponse httpResp = (HttpServletResponse) response;
        if (httpReq.getSession().getAttribute(ACCESS_LIST) != null && !httpReq.getSession().getAttribute(ACCESS_LIST).equals("")) {
            if (httpReq.getSession().getAttribute(USER_NEED_TO_REGISTER) != null
                    && httpReq.getSession().getAttribute(USER_NEED_TO_REGISTER).equals("true")) {
                httpResp.sendRedirect(httpReq.getContextPath() + redirectPage);
            } else if (httpReq.getSession().getAttribute(USER_NEED_TO_REGISTER) != null
                    && httpReq.getSession().getAttribute(USER_NEED_TO_REGISTER).equals("blocked")) {
                httpResp.sendRedirect(httpReq.getContextPath() + "/logout");
            } else {
                System.err.println(((AccessList) httpReq.getSession().getAttribute(ACCESS_LIST)).getUserId() + " Accessing Admin page");
                chain.doFilter(request, response);
            }


        } else {
            httpResp.sendRedirect(httpReq.getContextPath() + redirectPage);
        }

    }

}