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- /*
- * SonarQube
- * Copyright (C) 2009-2019 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- package org.sonar.server.platform.web;
-
- import com.google.common.collect.ImmutableList;
- import java.io.IOException;
- import java.util.List;
- import java.util.function.Function;
- import java.util.function.Predicate;
- 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 org.sonar.core.util.stream.MoreCollectors;
-
- import static java.lang.String.format;
-
- public class RedirectFilter implements Filter {
-
- private static final String EMPTY = "";
-
- private static final List<Redirect> REDIRECTS = ImmutableList.of(
- newSimpleRedirect("/api", "/api/webservices/list"));
-
- @Override
- public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
- HttpServletRequest request = (HttpServletRequest) servletRequest;
- HttpServletResponse response = (HttpServletResponse) servletResponse;
- String path = extractPath(request);
- Predicate<Redirect> match = redirect -> redirect.test(path);
- List<Redirect> redirects = REDIRECTS.stream()
- .filter(match)
- .collect(MoreCollectors.toList());
-
- switch (redirects.size()) {
- case 0:
- chain.doFilter(request, response);
- break;
- case 1:
- response.sendRedirect(redirects.get(0).apply(request));
- break;
- default:
- throw new IllegalStateException(format("Multiple redirects have been found for '%s'", path));
- }
- }
-
- public static Redirect newSimpleRedirect(String from, String to) {
- return new Redirect() {
- @Override
- public boolean test(String path) {
- return from.equals(path);
- }
-
- @Override
- public String apply(HttpServletRequest request) {
- return format("%s%s", request.getContextPath(), to);
- }
- };
- }
-
- @Override
- public void init(FilterConfig filterConfig) {
- // Nothing
- }
-
- @Override
- public void destroy() {
- // Nothing
- }
-
- private interface Redirect extends Predicate<String>, Function<HttpServletRequest, String> {
- @Override
- boolean test(String path);
-
- @Override
- String apply(HttpServletRequest request);
- }
-
- private static String extractPath(HttpServletRequest request) {
- return sanitizePath(request.getRequestURI().replaceFirst(request.getContextPath(), EMPTY));
- }
-
- private static String sanitizePath(String path) {
- if (path.length() > 1 && path.endsWith("/")) {
- return path.substring(0, path.length() - 1);
- }
- return path;
- }
- }
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