| commit | author | age | ||
| 11924d | 1 | /* |
| JM | 2 | * Copyright 2012 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 | ||
| 18 | import java.io.IOException; | |
| 19 | import java.text.MessageFormat; | |
| 20 | import java.text.ParseException; | |
| 21 | ||
| 22 | import javax.servlet.ServletContext; | |
| 23 | import javax.servlet.ServletException; | |
| 24 | import javax.servlet.http.HttpServlet; | |
| 25 | import javax.servlet.http.HttpServletRequest; | |
| 26 | import javax.servlet.http.HttpServletResponse; | |
| 27 | ||
| 28 | import org.eclipse.jgit.lib.Repository; | |
| 29 | import org.eclipse.jgit.revwalk.RevCommit; | |
| 30 | import org.eclipse.jgit.revwalk.RevTree; | |
| 31 | import org.slf4j.Logger; | |
| 32 | import org.slf4j.LoggerFactory; | |
| 33 | ||
| 34 | import com.gitblit.models.RefModel; | |
| 35 | import com.gitblit.utils.ArrayUtils; | |
| 36 | import com.gitblit.utils.JGitUtils; | |
| 37 | import com.gitblit.utils.MarkdownUtils; | |
| 38 | import com.gitblit.utils.StringUtils; | |
| 39 | ||
| 40 | /** | |
| 41 | * Serves the content of a gh-pages branch. | |
| 42 | * | |
| 43 | * @author James Moger | |
| 44 | * | |
| 45 | */ | |
| 46 | public class PagesServlet extends HttpServlet { | |
| 47 | ||
| 48 | private static final long serialVersionUID = 1L; | |
| 49 | ||
| 50 | private transient Logger logger = LoggerFactory.getLogger(PagesServlet.class); | |
| 51 | ||
| 52 | public PagesServlet() { | |
| 53 | super(); | |
| 54 | } | |
| 55 | ||
| 56 | /** | |
| 57 | * Returns an url to this servlet for the specified parameters. | |
| 58 | * | |
| 59 | * @param baseURL | |
| 60 | * @param repository | |
| 61 | * @param path | |
| 62 | * @return an url | |
| 63 | */ | |
| 64 | public static String asLink(String baseURL, String repository, String path) { | |
| 65 | if (baseURL.length() > 0 && baseURL.charAt(baseURL.length() - 1) == '/') { | |
| 66 | baseURL = baseURL.substring(0, baseURL.length() - 1); | |
| 67 | } | |
| 68 | return baseURL + Constants.PAGES + repository + "/" + (path == null ? "" : ("/" + path)); | |
| 69 | } | |
| 70 | ||
| 71 | /** | |
| 72 | * Retrieves the specified resource from the gh-pages branch of the | |
| 73 | * repository. | |
| 74 | * | |
| 75 | * @param request | |
| 76 | * @param response | |
| 77 | * @throws javax.servlet.ServletException | |
| 78 | * @throws java.io.IOException | |
| 79 | */ | |
| 80 | private void processRequest(HttpServletRequest request, HttpServletResponse response) | |
| 81 | throws ServletException, IOException { | |
| 82 | String path = request.getPathInfo(); | |
| 83 | if (path.toLowerCase().endsWith(".git")) { | |
| 84 | // forward to url with trailing / | |
| 85 | // this is important for relative pages links | |
| 86 | response.sendRedirect(request.getServletPath() + path + "/"); | |
| 87 | return; | |
| 88 | } | |
| 89 | if (path.charAt(0) == '/') { | |
| 90 | // strip leading / | |
| 91 | path = path.substring(1); | |
| 92 | } | |
| 93 | ||
| 94 | // determine repository and resource from url | |
| 95 | String repository = ""; | |
| 96 | String resource = ""; | |
| 97 | Repository r = null; | |
| 98 | int offset = 0; | |
| 99 | while (r == null) { | |
| 100 | int slash = path.indexOf('/', offset); | |
| 101 | if (slash == -1) { | |
| 102 | repository = path; | |
| 103 | } else { | |
| 104 | repository = path.substring(0, slash); | |
| 105 | } | |
| 106 | r = GitBlit.self().getRepository(repository, false); | |
| 107 | offset = slash + 1; | |
| 108 | if (offset > 0) { | |
| 109 | resource = path.substring(offset); | |
| 110 | } | |
| 111 | if (repository.equals(path)) { | |
| 112 | // either only repository in url or no repository found | |
| 113 | break; | |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 117 | ServletContext context = request.getSession().getServletContext(); | |
| 118 | ||
| 119 | try { | |
| 120 | if (r == null) { | |
| 121 | // repository not found! | |
| 122 | String mkd = MessageFormat.format( | |
| 123 | "# Error\nSorry, no valid **repository** specified in this url: {0}!", | |
| 124 | repository); | |
| 125 | error(response, mkd); | |
| 126 | return; | |
| 127 | } | |
| 128 | ||
| 129 | // retrieve the content from the repository | |
| 130 | RefModel pages = JGitUtils.getPagesBranch(r); | |
| 131 | RevCommit commit = JGitUtils.getCommit(r, pages.getObjectId().getName()); | |
| 132 | ||
| 133 | if (commit == null) { | |
| 134 | // branch not found! | |
| 135 | String mkd = MessageFormat.format( | |
| 136 | "# Error\nSorry, the repository {0} does not have a **gh-pages** branch!", | |
| 137 | repository); | |
| 138 | error(response, mkd); | |
| 139 | r.close(); | |
| 140 | return; | |
| 141 | } | |
| 142 | response.setDateHeader("Last-Modified", JGitUtils.getCommitDate(commit).getTime()); | |
| 143 | ||
| 144 | RevTree tree = commit.getTree(); | |
| 145 | byte[] content = null; | |
| 146 | if (StringUtils.isEmpty(resource)) { | |
| 147 | // find resource | |
| 148 | String[] files = { "index.html", "index.htm", "index.mkd" }; | |
| 149 | for (String file : files) { | |
| 150 | content = JGitUtils.getStringContent(r, tree, file) | |
| 151 | .getBytes(Constants.ENCODING); | |
| 152 | if (content != null) { | |
| 153 | resource = file; | |
| 154 | // assume text/html unless the servlet container | |
| 155 | // overrides | |
| 156 | response.setContentType("text/html; charset=" + Constants.ENCODING); | |
| 157 | break; | |
| 158 | } | |
| 159 | } | |
| 160 | } else { | |
| 161 | // specific resource | |
| d35134 | 162 | try { |
| JM | 163 | String contentType = context.getMimeType(resource); |
| 164 | if (contentType == null) { | |
| 165 | contentType = "text/plain"; | |
| 166 | } | |
| 167 | if (contentType.startsWith("text")) { | |
| 168 | content = JGitUtils.getStringContent(r, tree, resource).getBytes( | |
| 169 | Constants.ENCODING); | |
| 170 | } else { | |
| 171 | content = JGitUtils.getByteContent(r, tree, resource); | |
| 172 | } | |
| 173 | response.setContentType(contentType); | |
| 174 | } catch (Exception e) { | |
| 11924d | 175 | } |
| JM | 176 | } |
| 177 | ||
| 178 | // no content, try custom 404 page | |
| 179 | if (ArrayUtils.isEmpty(content)) { | |
| d35134 | 180 | String custom404 = JGitUtils.getStringContent(r, tree, "404.html"); |
| JM | 181 | if (!StringUtils.isEmpty(custom404)) { |
| 182 | content = custom404.getBytes(Constants.ENCODING); | |
| 183 | } | |
| 184 | ||
| 11924d | 185 | // still no content |
| JM | 186 | if (ArrayUtils.isEmpty(content)) { |
| d35134 | 187 | String str = MessageFormat.format( |
| 11924d | 188 | "# Error\nSorry, the requested resource **{0}** was not found.", |
| d35134 | 189 | resource); |
| JM | 190 | content = MarkdownUtils.transformMarkdown(str).getBytes(Constants.ENCODING); |
| 11924d | 191 | } |
| d35134 | 192 | |
| JM | 193 | try { |
| 194 | // output the content | |
| 195 | logger.warn("Pages 404: " + resource); | |
| 196 | response.setStatus(HttpServletResponse.SC_NOT_FOUND); | |
| 197 | response.getOutputStream().write(content); | |
| 198 | response.flushBuffer(); | |
| 199 | } catch (Throwable t) { | |
| 200 | logger.error("Failed to write page to client", t); | |
| 201 | } | |
| 202 | return; | |
| 11924d | 203 | } |
| JM | 204 | |
| 205 | // check to see if we should transform markdown files | |
| 206 | for (String ext : GitBlit.getStrings(Keys.web.markdownExtensions)) { | |
| 207 | if (resource.endsWith(ext)) { | |
| 208 | String mkd = new String(content, Constants.ENCODING); | |
| 209 | content = MarkdownUtils.transformMarkdown(mkd).getBytes(Constants.ENCODING); | |
| 210 | break; | |
| 211 | } | |
| 212 | } | |
| 213 | ||
| 214 | try { | |
| 215 | // output the content | |
| 216 | response.getOutputStream().write(content); | |
| 217 | response.flushBuffer(); | |
| 218 | } catch (Throwable t) { | |
| 219 | logger.error("Failed to write page to client", t); | |
| 220 | } | |
| 221 | ||
| 222 | // close the repository | |
| 223 | r.close(); | |
| 224 | } catch (Throwable t) { | |
| 225 | logger.error("Failed to write page to client", t); | |
| 226 | } | |
| 227 | } | |
| 228 | ||
| 229 | private void error(HttpServletResponse response, String mkd) throws ServletException, | |
| 230 | IOException, ParseException { | |
| 231 | String content = MarkdownUtils.transformMarkdown(mkd); | |
| 232 | response.setContentType("text/html; charset=" + Constants.ENCODING); | |
| 233 | response.getWriter().write(content); | |
| 234 | } | |
| 235 | ||
| 236 | @Override | |
| 237 | protected void doPost(HttpServletRequest request, HttpServletResponse response) | |
| 238 | throws ServletException, IOException { | |
| 239 | processRequest(request, response); | |
| 240 | } | |
| 241 | ||
| 242 | @Override | |
| 243 | protected void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 244 | throws ServletException, IOException { | |
| 245 | processRequest(request, response); | |
| 246 | } | |
| 247 | } | |
