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- /*
- * Copyright 2011 gitblit.com.
- *
- * 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.gitblit;
-
- import java.io.IOException;
- import java.text.MessageFormat;
-
- import javax.servlet.FilterChain;
- import javax.servlet.ServletException;
- import javax.servlet.ServletRequest;
- import javax.servlet.ServletResponse;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import com.gitblit.Constants.AccessRestrictionType;
- import com.gitblit.models.ProjectModel;
- import com.gitblit.models.RepositoryModel;
- import com.gitblit.models.UserModel;
-
- /**
- * The SyndicationFilter is an AuthenticationFilter which ensures that feed
- * requests for projects or view-restricted repositories have proper authentication
- * credentials and are authorized for the requested feed.
- *
- * @author James Moger
- *
- */
- public class SyndicationFilter extends AuthenticationFilter {
-
- /**
- * Extract the repository name from the url.
- *
- * @param url
- * @return repository name
- */
- protected String extractRequestedName(String url) {
- if (url.indexOf('?') > -1) {
- return url.substring(0, url.indexOf('?'));
- }
- return url;
- }
-
- /**
- * doFilter does the actual work of preprocessing the request to ensure that
- * the user may proceed.
- *
- * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
- * javax.servlet.ServletResponse, javax.servlet.FilterChain)
- */
- @Override
- public void doFilter(final ServletRequest request, final ServletResponse response,
- final FilterChain chain) throws IOException, ServletException {
-
- HttpServletRequest httpRequest = (HttpServletRequest) request;
- HttpServletResponse httpResponse = (HttpServletResponse) response;
-
- String fullUrl = getFullUrl(httpRequest);
- String name = extractRequestedName(fullUrl);
-
- ProjectModel project = GitBlit.self().getProjectModel(name);
- RepositoryModel model = null;
-
- if (project == null) {
- // try loading a repository model
- model = GitBlit.self().getRepositoryModel(name);
- if (model == null) {
- // repository not found. send 404.
- logger.info(MessageFormat.format("ARF: {0} ({1})", fullUrl,
- HttpServletResponse.SC_NOT_FOUND));
- httpResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
- return;
- }
- }
-
- // Wrap the HttpServletRequest with the AccessRestrictionRequest which
- // overrides the servlet container user principal methods.
- // JGit requires either:
- //
- // 1. servlet container authenticated user
- // 2. http.receivepack = true in each repository's config
- //
- // Gitblit must conditionally authenticate users per-repository so just
- // enabling http.receivepack is insufficient.
- AuthenticatedRequest authenticatedRequest = new AuthenticatedRequest(httpRequest);
- UserModel user = getUser(httpRequest);
- if (user != null) {
- authenticatedRequest.setUser(user);
- }
-
- // BASIC authentication challenge and response processing
- if (model != null) {
- if (model.accessRestriction.atLeast(AccessRestrictionType.VIEW)) {
- if (user == null) {
- // challenge client to provide credentials. send 401.
- if (GitBlit.isDebugMode()) {
- logger.info(MessageFormat.format("ARF: CHALLENGE {0}", fullUrl));
- }
- httpResponse.setHeader("WWW-Authenticate", CHALLENGE);
- httpResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED);
- return;
- } else {
- // check user access for request
- if (user.canView(model)) {
- // authenticated request permitted.
- // pass processing to the restricted servlet.
- newSession(authenticatedRequest, httpResponse);
- logger.info(MessageFormat.format("ARF: {0} ({1}) authenticated", fullUrl,
- HttpServletResponse.SC_CONTINUE));
- chain.doFilter(authenticatedRequest, httpResponse);
- return;
- }
- // valid user, but not for requested access. send 403.
- if (GitBlit.isDebugMode()) {
- logger.info(MessageFormat.format("ARF: {0} forbidden to access {1}",
- user.username, fullUrl));
- }
- httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN);
- return;
- }
- }
- }
-
- if (GitBlit.isDebugMode()) {
- logger.info(MessageFormat.format("ARF: {0} ({1}) unauthenticated", fullUrl,
- HttpServletResponse.SC_CONTINUE));
- }
- // unauthenticated request permitted.
- // pass processing to the restricted servlet.
- chain.doFilter(authenticatedRequest, httpResponse);
- }
- }
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