| // Copyright (C) 2016 The Android Open Source 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 com.google.gerrit.httpd; |
| |
| import com.google.gerrit.extensions.registration.DynamicItem; |
| import com.google.gerrit.extensions.registration.DynamicSet; |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.gerrit.server.IdentifiedUser; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.Singleton; |
| import com.google.inject.servlet.ServletModule; |
| import java.io.IOException; |
| import java.util.Optional; |
| 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; |
| |
| public class UniversalWebLoginFilter implements Filter { |
| private final DynamicItem<WebSession> session; |
| private final DynamicSet<WebLoginListener> webLoginListeners; |
| private final Provider<CurrentUser> userProvider; |
| |
| public static ServletModule module() { |
| return new ServletModule() { |
| @Override |
| protected void configureServlets() { |
| filter("/login*", "/logout*").through(UniversalWebLoginFilter.class); |
| bind(UniversalWebLoginFilter.class).in(Singleton.class); |
| |
| DynamicSet.setOf(binder(), WebLoginListener.class); |
| } |
| }; |
| } |
| |
| @Inject |
| public UniversalWebLoginFilter( |
| DynamicItem<WebSession> session, |
| DynamicSet<WebLoginListener> webLoginListeners, |
| Provider<CurrentUser> userProvider) { |
| this.session = session; |
| this.webLoginListeners = webLoginListeners; |
| this.userProvider = userProvider; |
| } |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException {} |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) |
| throws IOException, ServletException { |
| HttpServletRequest httpRequest = (HttpServletRequest) request; |
| HttpServletResponseRecorder wrappedResponse = |
| new HttpServletResponseRecorder((HttpServletResponse) response); |
| |
| Optional<IdentifiedUser> loggedInUserBefore = loggedInUser(); |
| chain.doFilter(request, wrappedResponse); |
| Optional<IdentifiedUser> loggedInUserAfter = loggedInUser(); |
| |
| if (!loggedInUserBefore.isPresent() && loggedInUserAfter.isPresent()) { |
| for (WebLoginListener loginListener : webLoginListeners) { |
| loginListener.onLogin(loggedInUserAfter.get(), httpRequest, wrappedResponse); |
| } |
| } else if (loggedInUserBefore.isPresent() && !loggedInUserAfter.isPresent()) { |
| for (WebLoginListener loginListener : webLoginListeners) { |
| loginListener.onLogout(loggedInUserBefore.get(), httpRequest, wrappedResponse); |
| } |
| } |
| |
| wrappedResponse.play(); |
| } |
| |
| private Optional<IdentifiedUser> loggedInUser() { |
| return session.get().isSignedIn() |
| ? Optional.of(userProvider.get().asIdentifiedUser()) |
| : Optional.empty(); |
| } |
| |
| @Override |
| public void destroy() {} |
| } |