net.mindengine.oculus.frontend.web.controllers.SimpleAjaxController.java Source code

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Here is the source code for net.mindengine.oculus.frontend.web.controllers.SimpleAjaxController.java

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/*******************************************************************************
* 2012 Ivan Shubin http://mindengine.net
* 
* This file is part of MindEngine.net Oculus Frontend.
* 
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with Oculus Frontend.  If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package net.mindengine.oculus.frontend.web.controllers;

import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.mindengine.oculus.frontend.domain.AjaxModel;
import net.mindengine.oculus.frontend.domain.user.Permission;
import net.mindengine.oculus.frontend.domain.user.User;
import net.mindengine.oculus.frontend.service.exceptions.NotAuthorizedException;
import net.mindengine.oculus.frontend.service.exceptions.PermissionDeniedException;
import net.mindengine.oculus.frontend.web.Auth;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import com.sdicons.json.mapper.JSONMapper;
import com.sdicons.json.model.JSONValue;

public class SimpleAjaxController implements Controller {
    protected Log logger = LogFactory.getLog(getClass());

    private Boolean authorizationCheck = false;
    private List<Permission> permissions;

    /**
     * Returns the authorized user bean
     * 
     * @param request
     * @return
     */
    public User getUser(HttpServletRequest request) {
        return Auth.getUserFromRequest(request);
    }

    public User getAuthorizedUser(HttpServletRequest request) throws NotAuthorizedException {
        return Auth.getAuthorizedUser(request);
    }

    public void verifyPermissions(HttpServletRequest request) throws Exception {
        User user = getUser(request);
        if (authorizationCheck || permissions != null) {
            if (user == null)
                throw new NotAuthorizedException("User is not authorized");
            if (permissions != null) {
                if (!user.hasAllPermissions(permissions))
                    throw new PermissionDeniedException("Permission denied");
            }
        }
    }

    public AjaxModel handleController(HttpServletRequest request) throws Exception {
        return null;
    }

    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        AjaxModel model = null;
        try {
            model = handleController(request);
            if (model == null)
                throw new Exception("The controller returned null model");
        } catch (Exception ex) {
            logger.error(ex, ex);
            model = new AjaxModel(ex);
        }

        OutputStream os = response.getOutputStream();
        OutputStreamWriter w = new OutputStreamWriter(os);
        response.setContentType("text/html");
        response.setCharacterEncoding("utf-8");

        JSONValue jsonValue = JSONMapper.toJSON(model);
        w.write(jsonValue.render(true));

        w.flush();
        os.flush();
        os.close();

        return null;
    }

    public Boolean getAuthorizationCheck() {
        return authorizationCheck;
    }

    public void setAuthorizationCheck(Boolean authorizationCheck) {
        this.authorizationCheck = authorizationCheck;
    }

    public List<Permission> getPermissions() {
        return permissions;
    }

    public void setPermissions(List<Permission> permissions) {
        this.permissions = permissions;
    }

}