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- /*
- * Copyright 2012 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 java.text.ParseException;
- import java.util.ArrayList;
- import java.util.List;
-
- import javax.servlet.ServletContext;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevTree;
- import org.slf4j.Logger;
- import org.slf4j.LoggerFactory;
-
- import com.gitblit.models.RefModel;
- import com.gitblit.utils.ArrayUtils;
- import com.gitblit.utils.JGitUtils;
- import com.gitblit.utils.MarkdownUtils;
- import com.gitblit.utils.StringUtils;
-
- /**
- * Serves the content of a gh-pages branch.
- *
- * @author James Moger
- *
- */
- public class PagesServlet extends HttpServlet {
-
- private static final long serialVersionUID = 1L;
-
- private transient Logger logger = LoggerFactory.getLogger(PagesServlet.class);
-
- public PagesServlet() {
- super();
- }
-
- /**
- * Returns an url to this servlet for the specified parameters.
- *
- * @param baseURL
- * @param repository
- * @param path
- * @return an url
- */
- public static String asLink(String baseURL, String repository, String path) {
- if (baseURL.length() > 0 && baseURL.charAt(baseURL.length() - 1) == '/') {
- baseURL = baseURL.substring(0, baseURL.length() - 1);
- }
- return baseURL + Constants.PAGES + repository + "/" + (path == null ? "" : ("/" + path));
- }
-
- /**
- * Retrieves the specified resource from the gh-pages branch of the
- * repository.
- *
- * @param request
- * @param response
- * @throws javax.servlet.ServletException
- * @throws java.io.IOException
- */
- private void processRequest(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- String path = request.getPathInfo();
- if (path.toLowerCase().endsWith(".git")) {
- // forward to url with trailing /
- // this is important for relative pages links
- response.sendRedirect(request.getServletPath() + path + "/");
- return;
- }
- if (path.charAt(0) == '/') {
- // strip leading /
- path = path.substring(1);
- }
-
- // determine repository and resource from url
- String repository = "";
- String resource = "";
- Repository r = null;
- int offset = 0;
- while (r == null) {
- int slash = path.indexOf('/', offset);
- if (slash == -1) {
- repository = path;
- } else {
- repository = path.substring(0, slash);
- }
- r = GitBlit.self().getRepository(repository, false);
- offset = slash + 1;
- if (offset > 0) {
- resource = path.substring(offset);
- }
- if (repository.equals(path)) {
- // either only repository in url or no repository found
- break;
- }
- }
-
- ServletContext context = request.getSession().getServletContext();
-
- try {
- if (r == null) {
- // repository not found!
- String mkd = MessageFormat.format(
- "# Error\nSorry, no valid **repository** specified in this url: {0}!",
- repository);
- error(response, mkd);
- return;
- }
-
- // retrieve the content from the repository
- RefModel pages = JGitUtils.getPagesBranch(r);
- RevCommit commit = JGitUtils.getCommit(r, pages.getObjectId().getName());
-
- if (commit == null) {
- // branch not found!
- String mkd = MessageFormat.format(
- "# Error\nSorry, the repository {0} does not have a **gh-pages** branch!",
- repository);
- error(response, mkd);
- r.close();
- return;
- }
-
- String [] encodings = GitBlit.getEncodings();
-
- RevTree tree = commit.getTree();
- byte[] content = null;
- if (StringUtils.isEmpty(resource)) {
- // find resource
- List<String> markdownExtensions = GitBlit.getStrings(Keys.web.markdownExtensions);
- List<String> extensions = new ArrayList<String>(markdownExtensions.size() + 2);
- extensions.add("html");
- extensions.add("htm");
- extensions.addAll(markdownExtensions);
- for (String ext : extensions){
- String file = "index." + ext;
- String stringContent = JGitUtils.getStringContent(r, tree, file, encodings);
- if(stringContent == null){
- continue;
- }
- content = stringContent.getBytes(Constants.ENCODING);
- if (content != null) {
- resource = file;
- // assume text/html unless the servlet container
- // overrides
- response.setContentType("text/html; charset=" + Constants.ENCODING);
- break;
- }
- }
- } else {
- // specific resource
- try {
- String contentType = context.getMimeType(resource);
- if (contentType == null) {
- contentType = "text/plain";
- }
- if (contentType.startsWith("text")) {
- content = JGitUtils.getStringContent(r, tree, resource, encodings).getBytes(
- Constants.ENCODING);
- } else {
- content = JGitUtils.getByteContent(r, tree, resource, false);
- }
- response.setContentType(contentType);
- } catch (Exception e) {
- }
- }
-
- // no content, try custom 404 page
- if (ArrayUtils.isEmpty(content)) {
- String custom404 = JGitUtils.getStringContent(r, tree, "404.html", encodings);
- if (!StringUtils.isEmpty(custom404)) {
- content = custom404.getBytes(Constants.ENCODING);
- }
-
- // still no content
- if (ArrayUtils.isEmpty(content)) {
- String str = MessageFormat.format(
- "# Error\nSorry, the requested resource **{0}** was not found.",
- resource);
- content = MarkdownUtils.transformMarkdown(str).getBytes(Constants.ENCODING);
- }
-
- try {
- // output the content
- logger.warn("Pages 404: " + resource);
- response.setStatus(HttpServletResponse.SC_NOT_FOUND);
- response.getOutputStream().write(content);
- response.flushBuffer();
- } catch (Throwable t) {
- logger.error("Failed to write page to client", t);
- }
- return;
- }
-
- // check to see if we should transform markdown files
- for (String ext : GitBlit.getStrings(Keys.web.markdownExtensions)) {
- if (resource.endsWith(ext)) {
- String mkd = new String(content, Constants.ENCODING);
- content = MarkdownUtils.transformMarkdown(mkd).getBytes(Constants.ENCODING);
- response.setContentType("text/html; charset=" + Constants.ENCODING);
- break;
- }
- }
-
- try {
- // output the content
- response.setHeader("Cache-Control", "public, max-age=3600, must-revalidate");
- response.setDateHeader("Last-Modified", JGitUtils.getCommitDate(commit).getTime());
- response.getOutputStream().write(content);
- response.flushBuffer();
- } catch (Throwable t) {
- logger.error("Failed to write page to client", t);
- }
-
- // close the repository
- r.close();
- } catch (Throwable t) {
- logger.error("Failed to write page to client", t);
- }
- }
-
- private void error(HttpServletResponse response, String mkd) throws ServletException,
- IOException, ParseException {
- String content = MarkdownUtils.transformMarkdown(mkd);
- response.setContentType("text/html; charset=" + Constants.ENCODING);
- response.getWriter().write(content);
- }
-
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- processRequest(request, response);
- }
-
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- processRequest(request, response);
- }
- }
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