// Copyright 2020 Google LLC
//
// 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
//
//     https://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 servlets;

import java.io.IOException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import util.UserAuthUtil;

@WebServlet("/Invalidate")
public class InvalidateSessionServlet extends HttpServlet {

  // Invalidate the HttpSession that holds the access token.
  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    HttpSession session = request.getSession(true);
    session.invalidate();
  }
}

// Copyright 2020 Google LLC
//
// 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
//
//     https://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 servlets;

import java.io.IOException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import util.UserAuthUtil;

@WebServlet("/Invalidate")
public class InvalidateSessionServlet extends HttpServlet {

  // Invalidate the HttpSession that holds the access token.
  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    HttpSession session = request.getSession(false);
    session.invalidate();
  }
}

change getSession(true) to getSession(false)