| commit | author | age | ||
| 8c9a20 | 1 | /* |
| JM | 2 | * Copyright 2011 gitblit.com. |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package com.gitblit; | |
| 17 | ||
| 13a3f5 | 18 | import java.io.IOException; |
| JM | 19 | import java.text.MessageFormat; |
| 20 | ||
| 21 | import javax.servlet.FilterChain; | |
| 22 | import javax.servlet.ServletException; | |
| 23 | import javax.servlet.ServletRequest; | |
| 24 | import javax.servlet.ServletResponse; | |
| 25 | import javax.servlet.http.HttpServletRequest; | |
| 26 | import javax.servlet.http.HttpServletResponse; | |
| 27 | ||
| 8c9a20 | 28 | import com.gitblit.Constants.AccessRestrictionType; |
| 13a3f5 | 29 | import com.gitblit.models.ProjectModel; |
| 8c9a20 | 30 | import com.gitblit.models.RepositoryModel; |
| JM | 31 | import com.gitblit.models.UserModel; |
| 32 | ||
| 892570 | 33 | /** |
| 13a3f5 | 34 | * The SyndicationFilter is an AuthenticationFilter which ensures that feed |
| JM | 35 | * requests for projects or view-restricted repositories have proper authentication |
| 892570 | 36 | * credentials and are authorized for the requested feed. |
| JM | 37 | * |
| 38 | * @author James Moger | |
| 39 | * | |
| 40 | */ | |
| 13a3f5 | 41 | public class SyndicationFilter extends AuthenticationFilter { |
| 8c9a20 | 42 | |
| 892570 | 43 | /** |
| JM | 44 | * Extract the repository name from the url. |
| 45 | * | |
| 46 | * @param url | |
| 47 | * @return repository name | |
| 48 | */ | |
| 13a3f5 | 49 | protected String extractRequestedName(String url) { |
| 565ee0 | 50 | if (url.indexOf('?') > -1) { |
| JM | 51 | return url.substring(0, url.indexOf('?')); |
| 52 | } | |
| 8c9a20 | 53 | return url; |
| JM | 54 | } |
| 55 | ||
| 892570 | 56 | /** |
| 13a3f5 | 57 | * doFilter does the actual work of preprocessing the request to ensure that |
| JM | 58 | * the user may proceed. |
| 892570 | 59 | * |
| 13a3f5 | 60 | * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, |
| JM | 61 | * javax.servlet.ServletResponse, javax.servlet.FilterChain) |
| 892570 | 62 | */ |
| 8c9a20 | 63 | @Override |
| 13a3f5 | 64 | public void doFilter(final ServletRequest request, final ServletResponse response, |
| JM | 65 | final FilterChain chain) throws IOException, ServletException { |
| 8c9a20 | 66 | |
| 13a3f5 | 67 | HttpServletRequest httpRequest = (HttpServletRequest) request; |
| JM | 68 | HttpServletResponse httpResponse = (HttpServletResponse) response; |
| 8c9a20 | 69 | |
| 13a3f5 | 70 | String fullUrl = getFullUrl(httpRequest); |
| JM | 71 | String name = extractRequestedName(fullUrl); |
| 8c9a20 | 72 | |
| 13a3f5 | 73 | ProjectModel project = GitBlit.self().getProjectModel(name); |
| JM | 74 | RepositoryModel model = null; |
| 75 | ||
| 76 | if (project == null) { | |
| 77 | // try loading a repository model | |
| 78 | model = GitBlit.self().getRepositoryModel(name); | |
| 79 | if (model == null) { | |
| 80 | // repository not found. send 404. | |
| 81 | logger.info(MessageFormat.format("ARF: {0} ({1})", fullUrl, | |
| 82 | HttpServletResponse.SC_NOT_FOUND)); | |
| 83 | httpResponse.sendError(HttpServletResponse.SC_NOT_FOUND); | |
| 84 | return; | |
| 85 | } | |
| 86 | } | |
| 87 | ||
| 88 | // Wrap the HttpServletRequest with the AccessRestrictionRequest which | |
| 89 | // overrides the servlet container user principal methods. | |
| 90 | // JGit requires either: | |
| 91 | // | |
| 92 | // 1. servlet container authenticated user | |
| 93 | // 2. http.receivepack = true in each repository's config | |
| 94 | // | |
| 95 | // Gitblit must conditionally authenticate users per-repository so just | |
| 96 | // enabling http.receivepack is insufficient. | |
| 97 | AuthenticatedRequest authenticatedRequest = new AuthenticatedRequest(httpRequest); | |
| 98 | UserModel user = getUser(httpRequest); | |
| 99 | if (user != null) { | |
| 100 | authenticatedRequest.setUser(user); | |
| 101 | } | |
| 102 | ||
| 103 | // BASIC authentication challenge and response processing | |
| 104 | if (model != null) { | |
| 105 | if (model.accessRestriction.atLeast(AccessRestrictionType.VIEW)) { | |
| 106 | if (user == null) { | |
| 107 | // challenge client to provide credentials. send 401. | |
| 108 | if (GitBlit.isDebugMode()) { | |
| 109 | logger.info(MessageFormat.format("ARF: CHALLENGE {0}", fullUrl)); | |
| 110 | } | |
| 111 | httpResponse.setHeader("WWW-Authenticate", CHALLENGE); | |
| 112 | httpResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED); | |
| 113 | return; | |
| 114 | } else { | |
| 115 | // check user access for request | |
| 116 | if (user.canAdmin || user.canAccessRepository(model)) { | |
| 117 | // authenticated request permitted. | |
| 118 | // pass processing to the restricted servlet. | |
| 119 | newSession(authenticatedRequest, httpResponse); | |
| 120 | logger.info(MessageFormat.format("ARF: {0} ({1}) authenticated", fullUrl, | |
| 121 | HttpServletResponse.SC_CONTINUE)); | |
| 122 | chain.doFilter(authenticatedRequest, httpResponse); | |
| 123 | return; | |
| 124 | } | |
| 125 | // valid user, but not for requested access. send 403. | |
| 126 | if (GitBlit.isDebugMode()) { | |
| 127 | logger.info(MessageFormat.format("ARF: {0} forbidden to access {1}", | |
| 128 | user.username, fullUrl)); | |
| 129 | } | |
| 130 | httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN); | |
| 131 | return; | |
| 132 | } | |
| 133 | } | |
| 134 | } | |
| 135 | ||
| 136 | if (GitBlit.isDebugMode()) { | |
| 137 | logger.info(MessageFormat.format("ARF: {0} ({1}) unauthenticated", fullUrl, | |
| 138 | HttpServletResponse.SC_CONTINUE)); | |
| 139 | } | |
| 140 | // unauthenticated request permitted. | |
| 141 | // pass processing to the restricted servlet. | |
| 142 | chain.doFilter(authenticatedRequest, httpResponse); | |
| 143 | } | |
| 8c9a20 | 144 | } |
