com.expressflow.interceptors.SessionInterceptor.java Source code

Introduction

Here is the source code for com.expressflow.interceptors.SessionInterceptor.java

Source

package com.expressflow.interceptors;

/*
Copyright (c) 2011 Martin Vasko, Ph.D.
    
licensing@expressflow.com
http://expressflow.com/license
*/

import java.util.logging.Logger;

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

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.expressflow.Constants;
import com.expressflow.datastore.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

public class SessionInterceptor extends HandlerInterceptorAdapter {
    private static Logger logger = Logger.getLogger(SessionInterceptor.class.getSimpleName());

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {

        // Checking expressBPEL Session
        logger.info("Checking User Session");
        User user = (User) request.getSession().getAttribute(Constants.SESSION_USER);
        String uri = request.getRequestURI();
        String base = request.getContextPath();
        uri = uri.substring(base.length());
        if (user == null && !uri.startsWith("/api/login")) {

            // Check Google App Engine User Service
            logger.info("Checking Google App Engine User Service");
            UserService userService = UserServiceFactory.getUserService();
            com.google.appengine.api.users.User googleUser = userService.getCurrentUser();

            if (googleUser != null) {
                logger.info("Email: " + googleUser.getEmail() + "\t Nickname: " + googleUser.getNickname());
            }

            if (googleUser == null) {
                logger.info("All checks failed. Invalidating session.");
                response.sendRedirect(userService.createLoginURL(request.getRequestURI()));
                return false;
            }
        }
        return true;
    }
}