fr.gael.dhus.service.SecurityService.java Source code

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Here is the source code for fr.gael.dhus.service.SecurityService.java

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/*
 * Data Hub Service (DHuS) - For Space data distribution.
 * Copyright (C) 2013,2014,2015 GAEL Systems
 *
 * This file is part of DHuS software sources.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package fr.gael.dhus.service;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Service;

import fr.gael.dhus.database.object.User;

/**
 * Security Service provides connected clients with a set of method to interact
 * with it.
 */
@Service
public class SecurityService extends WebService {
    public static final String AUTHENTICATION_KEY = "DHUS_AUTHENTICATION_KEY";

    private static Log logger = LogFactory.getLog(SecurityService.class);

    /**
     * Get currently connected User.
     * 
     * @return Current User.
     */
    public User getCurrentUser() {
        SecurityContext context = SecurityContextHolder.getContext();

        if (context == null) {
            logger.error("No security context");
            return null;
        }

        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (auth == null) {
            logger.error("No auth in security context");
            return null;
        }
        Object principal = auth.getPrincipal();
        if (principal instanceof User) {
            return (User) principal;
        }
        logger.debug("Principal class : " + principal.getClass());
        return null;
    }
}