/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit;
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import java.text.MessageFormat;
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import java.util.List;
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import javax.servlet.http.HttpServlet;
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import org.eclipse.jgit.lib.Repository;
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import org.eclipse.jgit.revwalk.RevCommit;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.gitblit.models.RepositoryModel;
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import com.gitblit.utils.HttpUtils;
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import com.gitblit.utils.JGitUtils;
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import com.gitblit.utils.StringUtils;
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import com.gitblit.utils.SyndicationUtils;
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/**
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* SyndicationServlet generates RSS 2.0 feeds and feed links.
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*
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* Access to this servlet is protected by the SyndicationFilter.
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*
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* @author James Moger
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*
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*/
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public class SyndicationServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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private transient Logger logger = LoggerFactory.getLogger(SyndicationServlet.class);
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/**
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* Create a feed link for the specified repository and branch/tag/commit id.
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*
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* @param baseURL
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* @param repository
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* the repository name
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* @param objectId
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* the branch, tag, or first commit for the feed
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* @param length
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* the number of commits to include in the feed
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* @return an RSS feed url
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*/
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public static String asLink(String baseURL, String repository, String objectId, int length) {
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if (baseURL.length() > 0 && baseURL.charAt(baseURL.length() - 1) == '/') {
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baseURL = baseURL.substring(0, baseURL.length() - 1);
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}
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StringBuilder url = new StringBuilder();
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url.append(baseURL);
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url.append(Constants.SYNDICATION_PATH);
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url.append(repository);
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if (!StringUtils.isEmpty(objectId) || length > 0) {
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StringBuilder parameters = new StringBuilder("?");
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if (StringUtils.isEmpty(objectId)) {
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parameters.append("l=");
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parameters.append(length);
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} else {
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parameters.append("h=");
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parameters.append(objectId);
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if (length > 0) {
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parameters.append("&l=");
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parameters.append(length);
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}
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}
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url.append(parameters);
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}
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return url.toString();
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}
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/**
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* Determines the appropriate title for a feed.
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*
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* @param repository
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* @param objectId
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* @return title of the feed
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*/
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public static String getTitle(String repository, String objectId) {
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String id = objectId;
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if (!StringUtils.isEmpty(id)) {
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if (id.startsWith(org.eclipse.jgit.lib.Constants.R_HEADS)) {
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id = id.substring(org.eclipse.jgit.lib.Constants.R_HEADS.length());
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} else if (id.startsWith(org.eclipse.jgit.lib.Constants.R_REMOTES)) {
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id = id.substring(org.eclipse.jgit.lib.Constants.R_REMOTES.length());
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} else if (id.startsWith(org.eclipse.jgit.lib.Constants.R_TAGS)) {
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id = id.substring(org.eclipse.jgit.lib.Constants.R_TAGS.length());
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}
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}
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return MessageFormat.format("{0} ({1})", repository, id);
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}
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/**
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* Generates the feed content.
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*
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* @param request
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* @param response
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* @throws javax.servlet.ServletException
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* @throws java.io.IOException
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*/
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private void processRequest(javax.servlet.http.HttpServletRequest request,
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javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException,
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java.io.IOException {
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String servletUrl = request.getContextPath() + request.getServletPath();
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String url = request.getRequestURI().substring(servletUrl.length());
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if (url.charAt(0) == '/' && url.length() > 1) {
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url = url.substring(1);
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}
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String repositoryName = url;
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String objectId = request.getParameter("h");
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String l = request.getParameter("l");
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int length = GitBlit.getInteger(Keys.web.syndicationEntries, 25);
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if (StringUtils.isEmpty(objectId)) {
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objectId = org.eclipse.jgit.lib.Constants.HEAD;
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}
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if (!StringUtils.isEmpty(l)) {
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try {
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length = Integer.parseInt(l);
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} catch (NumberFormatException x) {
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}
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}
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response.setContentType("application/rss+xml; charset=UTF-8");
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Repository repository = GitBlit.self().getRepository(repositoryName);
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RepositoryModel model = GitBlit.self().getRepositoryModel(repositoryName);
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List<RevCommit> commits = JGitUtils.getRevLog(repository, objectId, 0, length);
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try {
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SyndicationUtils.toRSS(HttpUtils.getGitblitURL(request), getTitle(model.name, objectId), model.description,
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model.name, commits, response.getOutputStream());
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} catch (Exception e) {
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logger.error("An error occurred during feed generation", e);
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}
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}
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@Override
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protected void doPost(javax.servlet.http.HttpServletRequest request,
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javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException,
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java.io.IOException {
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processRequest(request, response);
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}
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@Override
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protected void doGet(javax.servlet.http.HttpServletRequest request,
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javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException,
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java.io.IOException {
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processRequest(request, response);
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}
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}
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