/*
* Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
*
* This file is part of Duckling project.
*
* Licensed 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 cn.vlabs.umt.ui.servlet.filters;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import cn.vlabs.umt.ui.UMTContext;
public class LoginOnlyFilter implements Filter {
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
String contexPath=req.getContextPath();
if (hasLogin(req)){
chain.doFilter(request, response);//Ignored
return;
}else{
HttpServletResponse resp = (HttpServletResponse)response;
resp.sendRedirect(contexPath+"/login");
}
}
private boolean hasLogin(HttpServletRequest req) {
HttpSession session = req.getSession(false);
if (session==null){
return false;
}
return UMTContext.getLoginInfo(session).getUser()!=null;
}
public void init(FilterConfig config) throws ServletException {
}
}