443 lines
14 KiB
Java
443 lines
14 KiB
Java
// Copyright (C) 2015 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.httpd.raw;
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import static java.nio.file.Files.exists;
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import static java.nio.file.Files.isReadable;
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import com.google.common.cache.Cache;
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import com.google.common.collect.ImmutableList;
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import com.google.common.flogger.FluentLogger;
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import com.google.gerrit.common.Nullable;
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import com.google.gerrit.extensions.api.GerritApi;
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import com.google.gerrit.httpd.XsrfCookieFilter;
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import com.google.gerrit.httpd.raw.ResourceServlet.Resource;
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import com.google.gerrit.launcher.GerritLauncher;
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import com.google.gerrit.server.cache.CacheModule;
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import com.google.gerrit.server.config.CanonicalWebUrl;
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import com.google.gerrit.server.config.GerritOptions;
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import com.google.gerrit.server.config.GerritServerConfig;
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import com.google.gerrit.server.config.SitePaths;
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import com.google.inject.Inject;
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import com.google.inject.Key;
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import com.google.inject.Provides;
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import com.google.inject.ProvisionException;
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import com.google.inject.Singleton;
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import com.google.inject.name.Named;
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import com.google.inject.name.Names;
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import com.google.inject.servlet.ServletModule;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.nio.file.FileSystem;
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import java.nio.file.Path;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import javax.servlet.http.HttpServletResponse;
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import org.eclipse.jgit.http.server.GitSmartHttpTools;
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import org.eclipse.jgit.lib.Config;
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public class StaticModule extends ServletModule {
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private static final FluentLogger logger = FluentLogger.forEnclosingClass();
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public static final String CACHE = "static_content";
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/**
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* Paths at which we should serve the main PolyGerrit application {@code index.html}.
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*
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* <p>Supports {@code "/*"} as a trailing wildcard.
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*/
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public static final ImmutableList<String> POLYGERRIT_INDEX_PATHS =
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ImmutableList.of(
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"/",
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"/c/*",
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"/id/*",
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"/p/*",
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"/q/*",
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"/x/*",
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"/admin/*",
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"/dashboard/*",
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"/groups/self",
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"/settings/*",
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"/Documentation/q/*");
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/**
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* Paths that should be treated as static assets when serving PolyGerrit.
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*
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* <p>Supports {@code "/*"} as a trailing wildcard.
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*/
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private static final ImmutableList<String> POLYGERRIT_ASSET_PATHS =
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ImmutableList.of(
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"/behaviors/*",
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"/bower_components/*",
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"/elements/*",
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"/fonts/*",
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"/scripts/*",
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"/styles/*");
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private static final String DOC_SERVLET = "DocServlet";
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private static final String FAVICON_SERVLET = "FaviconServlet";
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private static final String POLYGERRIT_INDEX_SERVLET = "PolyGerritUiIndexServlet";
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private static final String ROBOTS_TXT_SERVLET = "RobotsTxtServlet";
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private final GerritOptions options;
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private Paths paths;
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@Inject
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public StaticModule(GerritOptions options) {
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this.options = options;
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}
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@Provides
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@Singleton
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private Paths getPaths() {
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if (paths == null) {
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paths = new Paths(options);
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}
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return paths;
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}
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@Override
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protected void configureServlets() {
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serveRegex("^/Documentation$").with(named(DOC_SERVLET));
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serveRegex("^/Documentation/$").with(named(DOC_SERVLET));
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serveRegex("^/Documentation/(.+)$").with(named(DOC_SERVLET));
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serve("/static/*").with(SiteStaticDirectoryServlet.class);
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install(
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new CacheModule() {
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@Override
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protected void configure() {
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cache(CACHE, Path.class, Resource.class)
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.maximumWeight(1 << 20)
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.weigher(ResourceServlet.Weigher.class);
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}
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});
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if (!options.headless()) {
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install(new CoreStaticModule());
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install(new PolyGerritModule());
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}
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}
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@Provides
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@Singleton
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@Named(DOC_SERVLET)
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HttpServlet getDocServlet(@Named(CACHE) Cache<Path, Resource> cache) {
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Paths p = getPaths();
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if (p.warFs != null) {
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return new WarDocServlet(cache, p.warFs);
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} else if (p.unpackedWar != null && !p.isDev()) {
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return new DirectoryDocServlet(cache, p.unpackedWar);
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} else {
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return new HttpServlet() {
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private static final long serialVersionUID = 1L;
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@Override
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protected void service(HttpServletRequest req, HttpServletResponse resp)
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throws IOException {
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resp.sendError(HttpServletResponse.SC_NOT_FOUND);
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}
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};
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}
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}
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private class CoreStaticModule extends ServletModule {
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@Override
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public void configureServlets() {
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serve("/robots.txt").with(named(ROBOTS_TXT_SERVLET));
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serve("/favicon.ico").with(named(FAVICON_SERVLET));
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}
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@Provides
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@Singleton
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@Named(ROBOTS_TXT_SERVLET)
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HttpServlet getRobotsTxtServlet(
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@GerritServerConfig Config cfg,
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SitePaths sitePaths,
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@Named(CACHE) Cache<Path, Resource> cache) {
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Path configPath = sitePaths.resolve(cfg.getString("httpd", null, "robotsFile"));
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if (configPath != null) {
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if (exists(configPath) && isReadable(configPath)) {
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return new SingleFileServlet(cache, configPath, true);
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}
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logger.atWarning().log("Cannot read httpd.robotsFile, using default");
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}
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Paths p = getPaths();
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if (p.warFs != null) {
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return new SingleFileServlet(cache, p.warFs.getPath("/robots.txt"), false);
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}
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return new SingleFileServlet(cache, webappSourcePath("robots.txt"), true);
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}
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@Provides
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@Singleton
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@Named(FAVICON_SERVLET)
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HttpServlet getFaviconServlet(@Named(CACHE) Cache<Path, Resource> cache) {
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Paths p = getPaths();
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if (p.warFs != null) {
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return new SingleFileServlet(cache, p.warFs.getPath("/favicon.ico"), false);
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}
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return new SingleFileServlet(cache, webappSourcePath("favicon.ico"), true);
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}
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private Path webappSourcePath(String name) {
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Paths p = getPaths();
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if (p.unpackedWar != null) {
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return p.unpackedWar.resolve(name);
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}
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return p.sourceRoot.resolve("webapp/" + name);
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}
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}
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private class PolyGerritModule extends ServletModule {
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@Override
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public void configureServlets() {
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for (String p : POLYGERRIT_INDEX_PATHS) {
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filter(p).through(XsrfCookieFilter.class);
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}
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filter("/*").through(PolyGerritFilter.class);
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}
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@Provides
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@Singleton
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@Named(POLYGERRIT_INDEX_SERVLET)
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HttpServlet getPolyGerritUiIndexServlet(
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@CanonicalWebUrl @Nullable String canonicalUrl,
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@GerritServerConfig Config cfg,
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GerritApi gerritApi) {
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String cdnPath =
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options.useDevCdn() ? options.devCdn() : cfg.getString("gerrit", null, "cdnPath");
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String faviconPath = cfg.getString("gerrit", null, "faviconPath");
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return new IndexServlet(canonicalUrl, cdnPath, faviconPath, gerritApi, cfg);
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}
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@Provides
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@Singleton
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PolyGerritUiServlet getPolyGerritUiServlet(@Named(CACHE) Cache<Path, Resource> cache) {
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return new PolyGerritUiServlet(cache, polyGerritBasePath());
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}
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private Path polyGerritBasePath() {
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Paths p = getPaths();
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return p.warFs != null
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? p.warFs.getPath("/polygerrit_ui")
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: p.unpackedWar.resolve("polygerrit_ui");
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}
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}
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private static class Paths {
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private final FileSystem warFs;
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private final Path sourceRoot;
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private final Path unpackedWar;
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private final boolean development;
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private Paths(GerritOptions options) {
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try {
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File launcherLoadedFrom = getLauncherLoadedFrom();
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if (launcherLoadedFrom != null && launcherLoadedFrom.getName().endsWith(".jar")) {
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// Special case: unpacked war archive deployed in container.
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// The path is something like:
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// <container>/<gerrit>/WEB-INF/lib/launcher.jar
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// Switch to exploded war case with <container>/webapp>/<gerrit>
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// root directory
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warFs = null;
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unpackedWar =
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java.nio.file.Paths.get(
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launcherLoadedFrom.getParentFile().getParentFile().getParentFile().toURI());
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sourceRoot = null;
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development = false;
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return;
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}
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warFs = getDistributionArchive(launcherLoadedFrom);
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if (warFs == null) {
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unpackedWar = makeWarTempDir();
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development = true;
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} else if (options.useDevCdn()) {
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unpackedWar = null;
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development = true;
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} else {
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unpackedWar = null;
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development = false;
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sourceRoot = null;
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return;
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}
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} catch (IOException e) {
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throw new ProvisionException("Error initializing static content paths", e);
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}
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sourceRoot = getSourceRootOrNull();
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}
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private static Path getSourceRootOrNull() {
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try {
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return GerritLauncher.resolveInSourceRoot(".");
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} catch (FileNotFoundException e) {
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return null;
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}
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}
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private FileSystem getDistributionArchive(File war) throws IOException {
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if (war == null) {
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return null;
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}
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return GerritLauncher.getZipFileSystem(war.toPath());
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}
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private File getLauncherLoadedFrom() {
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File war;
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try {
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war = GerritLauncher.getDistributionArchive();
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} catch (IOException e) {
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if ((e instanceof FileNotFoundException)
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&& GerritLauncher.NOT_ARCHIVED.equals(e.getMessage())) {
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return null;
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}
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throw new ProvisionException("Error reading gerrit.war", e);
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}
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return war;
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}
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private boolean isDev() {
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return development;
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}
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private Path makeWarTempDir() {
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// Obtain our local temporary directory, but it comes back as a file
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// so we have to switch it to be a directory post creation.
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//
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try {
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File dstwar = GerritLauncher.createTempFile("gerrit_", "war");
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if (!dstwar.delete() || !dstwar.mkdir()) {
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throw new IOException("Cannot mkdir " + dstwar.getAbsolutePath());
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}
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// Jetty normally refuses to serve out of a symlinked directory, as
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// a security feature. Try to resolve out any symlinks in the path.
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//
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try {
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return dstwar.getCanonicalFile().toPath();
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} catch (IOException e) {
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return dstwar.getAbsoluteFile().toPath();
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}
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} catch (IOException e) {
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throw new ProvisionException("Cannot create war tempdir", e);
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}
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}
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}
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private static Key<HttpServlet> named(String name) {
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return Key.get(HttpServlet.class, Names.named(name));
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}
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@Singleton
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private static class PolyGerritFilter implements Filter {
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private final HttpServlet polyGerritIndex;
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private final PolyGerritUiServlet polygerritUI;
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@Inject
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PolyGerritFilter(
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@Named(POLYGERRIT_INDEX_SERVLET) HttpServlet polyGerritIndex,
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PolyGerritUiServlet polygerritUI) {
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this.polyGerritIndex = polyGerritIndex;
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this.polygerritUI = polygerritUI;
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}
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@Override
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public void init(FilterConfig filterConfig) throws ServletException {}
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@Override
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public void destroy() {}
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
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throws IOException, ServletException {
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HttpServletRequest req = (HttpServletRequest) request;
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HttpServletResponse res = (HttpServletResponse) response;
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if (!GitSmartHttpTools.isGitClient(req)) {
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GuiceFilterRequestWrapper reqWrapper = new GuiceFilterRequestWrapper(req);
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String path = pathInfo(req);
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if (isPolyGerritIndex(path)) {
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polyGerritIndex.service(reqWrapper, res);
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return;
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}
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if (isPolyGerritAsset(path)) {
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polygerritUI.service(reqWrapper, res);
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return;
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}
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}
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chain.doFilter(req, res);
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}
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private static String pathInfo(HttpServletRequest req) {
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String uri = req.getRequestURI();
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String ctx = req.getContextPath();
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return uri.startsWith(ctx) ? uri.substring(ctx.length()) : uri;
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}
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private static boolean isPolyGerritAsset(String path) {
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return matchPath(POLYGERRIT_ASSET_PATHS, path);
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}
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private static boolean isPolyGerritIndex(String path) {
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return matchPath(POLYGERRIT_INDEX_PATHS, path);
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}
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private static boolean matchPath(Iterable<String> paths, String path) {
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for (String p : paths) {
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if (p.endsWith("/*")) {
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if (path.regionMatches(0, p, 0, p.length() - 1)) {
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return true;
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}
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} else if (p.equals(path)) {
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return true;
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}
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}
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return false;
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}
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}
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private static class GuiceFilterRequestWrapper extends HttpServletRequestWrapper {
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GuiceFilterRequestWrapper(HttpServletRequest req) {
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super(req);
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}
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@Override
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public String getPathInfo() {
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String uri = getRequestURI();
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String ctx = getContextPath();
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// This is a workaround for long standing guice filter bug:
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// https://github.com/google/guice/issues/807
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String res = uri.startsWith(ctx) ? uri.substring(ctx.length()) : uri;
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// Match the logic in the ResourceServlet, that re-add "/"
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// for null path info
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if ("/".equals(res)) {
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return null;
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}
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return res;
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}
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}
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}
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