google-nomulus/java/com/google/domain/registry/ui/server/AbstractUiServlet.java
2016-03-01 17:59:16 -05:00

105 lines
3.6 KiB
Java

// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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 com.google.domain.registry.ui.server;
import static com.google.domain.registry.security.XsrfTokenManager.generateToken;
import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.common.net.MediaType;
import com.google.template.soy.data.SoyMapData;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/** Abstract servlet for serving HTML pages. */
public abstract class AbstractUiServlet extends HttpServlet {
protected String userId;
protected String userName;
protected String userActionName;
protected String userActionHref;
protected boolean userIsAdmin;
@Override
public void service(HttpServletRequest req, HttpServletResponse rsp)
throws ServletException, IOException {
UserService userService = UserServiceFactory.getUserService();
if (userService.isUserLoggedIn()) {
User u = userService.getCurrentUser();
userId = u.getUserId();
userName = u.getNickname();
userActionName = "Sign out";
userActionHref = userService.createLogoutURL(req.getRequestURI());
userIsAdmin = userService.isUserAdmin();
} else {
userId = null;
userName = null;
userActionName = "Sign in";
userActionHref = userService.createLoginURL(req.getRequestURI());
userIsAdmin = false;
}
super.service(req, rsp);
}
@Override
public void doGet(HttpServletRequest req, HttpServletResponse rsp)
throws ServletException, IOException {
rsp.addHeader("X-Frame-Options", "SAMEORIGIN"); // Disallow iframing.
rsp.setHeader("X-Ui-Compatible", "IE=edge"); // Ask IE not to be silly.
rsp.setContentType(MediaType.HTML_UTF_8.toString());
UserService userService = UserServiceFactory.getUserService();
if (!userService.isUserLoggedIn()) {
rsp.sendRedirect(userService.createLoginURL(req.getRequestURI()));
return;
}
rsp.getWriter().write(get(req));
}
/**
* Subclasses may override this method to access request params, or
* get() to simply return content.
*/
protected String get(@SuppressWarnings("unused") HttpServletRequest req) {
return get();
}
/** Override this to just return content. */
protected String get() {
throw new UnsupportedOperationException();
}
/**
* Returns a map with {@code (user: (id,name,actionName,actionHref), gaeUserId:, xsrfToken:)}
*/
protected SoyMapData getTemplateArgs(String xsrfToken) {
SoyMapData user = new SoyMapData();
user.put("id", userId);
user.put("name", userName);
user.put("actionName", userActionName);
user.put("actionHref", userActionHref);
user.put("isAdmin", userIsAdmin);
SoyMapData result = new SoyMapData();
result.put("user", user);
result.put("gaeUserId", userId);
result.put("xsrfToken", generateToken(xsrfToken));
return result;
}
}