final byte[] loadCanonical(final RevWalk walk)
throws IOException, MissingObjectException, IncorrectObjectTypeException,
CorruptObjectException {
final ObjectLoader ldr = walk.db.openObject(walk.curs, this);
if (ldr == null) throw new MissingObjectException(this, getType());
final byte[] data = ldr.getCachedBytes();
if (getType() != ldr.getType()) throw new IncorrectObjectTypeException(this, getType());
return data;
}
public static GitObject createGitObject(RepositoryData repositoryData, String hash)
throws MissingObjectException, IOException {
Repository repository = repositoryData.getRepository();
ObjectId id = repository.resolve(hash);
ObjectLoader loader = repository.open(id);
GitObject object = null;
switch (loader.getType()) {
case Constants.OBJ_COMMIT:
object = new Commit(hash, new String(loader.getCachedBytes()));
break;
case Constants.OBJ_TREE:
object = new Tree(hash, loader.getBytes());
break;
case Constants.OBJ_BLOB:
object = new Blob(hash, new String(loader.getCachedBytes()));
break;
case Constants.OBJ_TAG:
object = new Tag(hash, new String(loader.getCachedBytes()));
break;
}
object.setRepositoryData(repositoryData);
return object;
}
protected byte[] readFile(String fileName) throws IOException {
if (revision == null) {
return new byte[] {};
}
TreeWalk tw = TreeWalk.forPath(reader, fileName, revision.getTree());
if (tw != null) {
ObjectLoader obj = reader.open(tw.getObjectId(0), Constants.OBJ_BLOB);
return obj.getCachedBytes(Integer.MAX_VALUE);
} else {
return new byte[] {};
}
}
private static void copy(TemporaryBuffer.Heap tinyPack, ObjectLoader ldr) throws IOException {
final byte[] buf = new byte[64];
final byte[] content = ldr.getCachedBytes();
int dataLength = content.length;
int nextLength = dataLength >>> 4;
int size = 0;
buf[size++] =
(byte) ((nextLength > 0 ? 0x80 : 0x00) | (ldr.getType() << 4) | (dataLength & 0x0F));
dataLength = nextLength;
while (dataLength > 0) {
nextLength >>>= 7;
buf[size++] = (byte) ((nextLength > 0 ? 0x80 : 0x00) | (dataLength & 0x7F));
dataLength = nextLength;
}
tinyPack.write(buf, 0, size);
deflate(tinyPack, content);
}
/**
* Push a candidate object onto the generator's traversal stack.
*
* <p>Candidates should be pushed in history order from oldest-to-newest. Applications should push
* the starting commit first, then the index revision (if the index is interesting), and finally
* the working tree copy (if the working tree is interesting).
*
* @param description description of the blob revision, such as "Working Tree".
* @param id may be a commit or a blob.
* @return {@code this}
* @throws IOException the repository cannot be read.
*/
public BlameGenerator push(String description, AnyObjectId id) throws IOException {
ObjectLoader ldr = reader.open(id);
if (ldr.getType() == OBJ_BLOB) {
if (description == null) description = JGitText.get().blameNotCommittedYet;
BlobCandidate c = new BlobCandidate(description, resultPath);
c.sourceBlob = id.toObjectId();
c.sourceText = new RawText(ldr.getCachedBytes(Integer.MAX_VALUE));
c.regionList = new Region(0, 0, c.sourceText.size());
remaining = c.sourceText.size();
push(c);
return this;
}
RevCommit commit = revPool.parseCommit(id);
if (!find(commit, resultPath)) return this;
Candidate c = new Candidate(commit, resultPath);
c.sourceBlob = idBuf.toObjectId();
c.loadText(reader);
c.regionList = new Region(0, 0, c.sourceText.size());
remaining = c.sourceText.size();
push(c);
return this;
}
@Override
protected void doGet(final HttpServletRequest req, final HttpServletResponse rsp)
throws IOException {
String keyStr = req.getPathInfo();
// We shouldn't have to do this extra decode pass, but somehow we
// are now receiving our "^1" suffix as "%5E1", which confuses us
// downstream. Other times we get our embedded "," as "%2C", which
// is equally bad. And yet when these happen a "%2F" is left as-is,
// rather than escaped as "%252F", which makes me feel really really
// uncomfortable with a blind decode right here.
//
keyStr = URLDecoder.decode(keyStr, "UTF-8");
if (!keyStr.startsWith("/")) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
keyStr = keyStr.substring(1);
final Patch.Key patchKey;
final int side;
{
final int c = keyStr.lastIndexOf('^');
if (c == 0) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
if (c < 0) {
side = 0;
} else {
try {
side = Integer.parseInt(keyStr.substring(c + 1));
keyStr = keyStr.substring(0, c);
} catch (NumberFormatException e) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
}
try {
patchKey = Patch.Key.parse(keyStr);
} catch (NumberFormatException e) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
}
final Change.Id changeId = patchKey.getParentKey().getParentKey();
final Project project;
final PatchSet patchSet;
try {
final ReviewDb db = requestDb.get();
final ChangeControl control = changeControl.validateFor(changeId);
project = control.getProject();
patchSet = db.patchSets().get(patchKey.getParentKey());
if (patchSet == null) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
} catch (NoSuchChangeException e) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
} catch (OrmException e) {
getServletContext().log("Cannot query database", e);
rsp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
final Repository repo;
try {
repo = repoManager.openRepository(project.getNameKey());
} catch (RepositoryNotFoundException e) {
getServletContext().log("Cannot open repository", e);
rsp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
final ObjectLoader blobLoader;
final RevCommit fromCommit;
final String suffix;
final String path = patchKey.getFileName();
try {
final ObjectReader reader = repo.newObjectReader();
try {
final RevWalk rw = new RevWalk(reader);
final RevCommit c;
final TreeWalk tw;
c = rw.parseCommit(ObjectId.fromString(patchSet.getRevision().get()));
if (side == 0) {
fromCommit = c;
suffix = "new";
} else if (1 <= side && side - 1 < c.getParentCount()) {
fromCommit = rw.parseCommit(c.getParent(side - 1));
if (c.getParentCount() == 1) {
suffix = "old";
} else {
suffix = "old" + side;
}
} else {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
tw = TreeWalk.forPath(reader, path, fromCommit.getTree());
if (tw == null) {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
if (tw.getFileMode(0).getObjectType() == Constants.OBJ_BLOB) {
blobLoader = reader.open(tw.getObjectId(0), Constants.OBJ_BLOB);
} else {
rsp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
} finally {
reader.release();
}
} catch (IOException e) {
getServletContext().log("Cannot read repository", e);
rsp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
} catch (RuntimeException e) {
getServletContext().log("Cannot read repository", e);
rsp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
} finally {
repo.close();
}
final byte[] raw = blobLoader.isLarge() ? null : blobLoader.getCachedBytes();
final long when = fromCommit.getCommitTime() * 1000L;
rsp.setDateHeader("Last-Modified", when);
rsp.setDateHeader("Expires", 0L);
rsp.setHeader("Pragma", "no-cache");
rsp.setHeader("Cache-Control", "no-cache, must-revalidate");
OutputStream out;
ZipOutputStream zo;
final MimeType contentType = registry.getMimeType(path, raw);
if (!registry.isSafeInline(contentType)) {
// The content may not be safe to transmit inline, as a browser might
// interpret it as HTML or JavaScript hosted by this site. Such code
// might then run in the site's security domain, and may be able to use
// the user's cookies to perform unauthorized actions.
//
// Usually, wrapping the content into a ZIP file forces the browser to
// save the content to the local system instead.
//
rsp.setContentType(ZIP.toString());
rsp.setHeader(
"Content-Disposition",
"attachment; filename=\"" + safeFileName(path, suffix) + ".zip" + "\"");
zo = new ZipOutputStream(rsp.getOutputStream());
final ZipEntry e = new ZipEntry(safeFileName(path, rand(req, suffix)));
e.setComment(fromCommit.name() + ":" + path);
e.setSize(blobLoader.getSize());
e.setTime(when);
zo.putNextEntry(e);
out = zo;
} else {
rsp.setContentType(contentType.toString());
rsp.setHeader("Content-Length", "" + blobLoader.getSize());
out = rsp.getOutputStream();
zo = null;
}
if (raw != null) {
out.write(raw);
} else {
blobLoader.copyTo(out);
}
if (zo != null) {
zo.closeEntry();
}
out.close();
}