blob: ed9fedd396c5b07c510ca712ce711d4b1e24f397 [file] [log] [blame]
// Copyright 2013 Google Inc. All Rights Reserved.
//
// 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.google.gitiles;
import static javax.servlet.http.HttpServletResponse.SC_OK;
import com.google.common.base.Strings;
import com.google.gitiles.GitilesRequestFailureException.FailureReason;
import java.io.IOException;
import java.util.Optional;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jgit.api.ArchiveCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.http.server.ServletUtils;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.TreeWalk;
public class ArchiveServlet extends BaseServlet {
private static final long serialVersionUID = 1L;
public ArchiveServlet(GitilesAccess.Factory accessFactory) {
super(null, accessFactory);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
GitilesView view = ViewFilter.getView(req);
Revision rev = view.getRevision();
Repository repo = ServletUtils.getRepository(req);
ObjectId treeId = getTree(view, repo, rev);
if (treeId.equals(ObjectId.zeroId())) {
throw new GitilesRequestFailureException(FailureReason.INCORRECT_OBJECT_TYPE);
}
Optional<ArchiveFormat> format =
ArchiveFormat.byExtension(view.getExtension(), getAccess(req).getConfig());
if (!format.isPresent()) {
throw new GitilesRequestFailureException(FailureReason.UNSUPPORTED_RESPONSE_FORMAT);
}
String filename = getFilename(view, rev, view.getExtension());
setDownloadHeaders(req, res, filename, format.get().getMimeType());
res.setStatus(SC_OK);
try {
new ArchiveCommand(repo)
.setFormat(format.get().getRegisteredName())
.setTree(treeId)
.setOutputStream(res.getOutputStream())
.call();
} catch (GitAPIException e) {
throw new IOException(e);
}
}
private ObjectId getTree(GitilesView view, Repository repo, Revision rev) throws IOException {
try (RevWalk rw = new RevWalk(repo)) {
RevTree tree = rw.parseTree(rev.getId());
if (Strings.isNullOrEmpty(view.getPathPart())) {
return tree;
}
TreeWalk tw = TreeWalk.forPath(rw.getObjectReader(), view.getPathPart(), tree);
if (tw == null || tw.getFileMode(0) != FileMode.TREE) {
return ObjectId.zeroId();
}
return tw.getObjectId(0);
} catch (IncorrectObjectTypeException e) {
return ObjectId.zeroId();
}
}
private String getFilename(GitilesView view, Revision rev, String ext) {
StringBuilder sb =
new StringBuilder()
.append(PathUtil.basename(view.getRepositoryName()))
.append('-')
.append(rev.getName());
if (view.getPathPart() != null) {
sb.append('-').append(view.getPathPart().replace('/', '-'));
}
return sb.append(ext).toString();
}
}