githubFork/gitblit.git - Solinfo Gitblit

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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);
			}
			}