- /*
- * Copyright (C) 2010, Google Inc. and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
- package org.eclipse.jgit.internal.storage.file;
-
- import static org.junit.Assert.assertArrayEquals;
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertFalse;
- import static org.junit.Assert.assertNotNull;
- import static org.junit.Assert.assertNull;
- import static org.junit.Assert.assertTrue;
- import static org.junit.Assert.fail;
-
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.security.MessageDigest;
- import java.text.MessageFormat;
- import java.util.ArrayList;
- import java.util.Arrays;
- import java.util.Collections;
- import java.util.List;
- import java.util.zip.Deflater;
-
- import org.eclipse.jgit.errors.LargeObjectException;
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.internal.storage.pack.DeltaEncoder;
- import org.eclipse.jgit.internal.storage.pack.PackExt;
- import org.eclipse.jgit.junit.JGitTestUtil;
- import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
- import org.eclipse.jgit.junit.TestRepository;
- import org.eclipse.jgit.junit.TestRng;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.NullProgressMonitor;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectInserter;
- import org.eclipse.jgit.lib.ObjectLoader;
- import org.eclipse.jgit.lib.ObjectStream;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.revwalk.RevBlob;
- import org.eclipse.jgit.storage.file.WindowCacheConfig;
- import org.eclipse.jgit.transport.PackParser;
- import org.eclipse.jgit.transport.PackedObjectInfo;
- import org.eclipse.jgit.util.IO;
- import org.eclipse.jgit.util.NB;
- import org.eclipse.jgit.util.TemporaryBuffer;
- import org.junit.After;
- import org.junit.Before;
- import org.junit.Test;
-
- public class PackTest extends LocalDiskRepositoryTestCase {
- private int streamThreshold = 16 * 1024;
-
- private TestRng rng;
-
- private FileRepository repo;
-
- private TestRepository<Repository> tr;
-
- private WindowCursor wc;
-
- private TestRng getRng() {
- if (rng == null)
- rng = new TestRng(JGitTestUtil.getName());
- return rng;
- }
-
- @Override
- @Before
- public void setUp() throws Exception {
- super.setUp();
-
- WindowCacheConfig cfg = new WindowCacheConfig();
- cfg.setStreamFileThreshold(streamThreshold);
- cfg.install();
-
- repo = createBareRepository();
- tr = new TestRepository<>(repo);
- wc = (WindowCursor) repo.newObjectReader();
- }
-
- @Override
- @After
- public void tearDown() throws Exception {
- if (wc != null)
- wc.close();
- new WindowCacheConfig().install();
- super.tearDown();
- }
-
- @Test
- public void testWhole_SmallObject() throws Exception {
- final int type = Constants.OBJ_BLOB;
- byte[] data = getRng().nextBytes(300);
- RevBlob id = tr.blob(data);
- tr.branch("master").commit().add("A", id).create();
- tr.packAndPrune();
- assertTrue("has blob", wc.has(id));
-
- ObjectLoader ol = wc.open(id);
- assertNotNull("created loader", ol);
- assertEquals(type, ol.getType());
- assertEquals(data.length, ol.getSize());
- assertFalse("is not large", ol.isLarge());
- assertTrue("same content", Arrays.equals(data, ol.getCachedBytes()));
-
- try (ObjectStream in = ol.openStream()) {
- assertNotNull("have stream", in);
- assertEquals(type, in.getType());
- assertEquals(data.length, in.getSize());
- byte[] data2 = new byte[data.length];
- IO.readFully(in, data2, 0, data.length);
- assertTrue("same content", Arrays.equals(data2, data));
- assertEquals("stream at EOF", -1, in.read());
- }
- }
-
- @Test
- public void testWhole_LargeObject() throws Exception {
- final int type = Constants.OBJ_BLOB;
- byte[] data = getRng().nextBytes(streamThreshold + 5);
- RevBlob id = tr.blob(data);
- tr.branch("master").commit().add("A", id).create();
- tr.packAndPrune();
- assertTrue("has blob", wc.has(id));
-
- ObjectLoader ol = wc.open(id);
- assertNotNull("created loader", ol);
- assertEquals(type, ol.getType());
- assertEquals(data.length, ol.getSize());
- assertTrue("is large", ol.isLarge());
- try {
- ol.getCachedBytes();
- fail("Should have thrown LargeObjectException");
- } catch (LargeObjectException tooBig) {
- assertEquals(MessageFormat.format(
- JGitText.get().largeObjectException, id.name()), tooBig
- .getMessage());
- }
-
- try (ObjectStream in = ol.openStream()) {
- assertNotNull("have stream", in);
- assertEquals(type, in.getType());
- assertEquals(data.length, in.getSize());
- byte[] data2 = new byte[data.length];
- IO.readFully(in, data2, 0, data.length);
- assertTrue("same content", Arrays.equals(data2, data));
- assertEquals("stream at EOF", -1, in.read());
- }
- }
-
- @Test
- public void testDelta_SmallObjectChain() throws Exception {
- try (ObjectInserter.Formatter fmt = new ObjectInserter.Formatter()) {
- byte[] data0 = new byte[512];
- Arrays.fill(data0, (byte) 0xf3);
- ObjectId id0 = fmt.idFor(Constants.OBJ_BLOB, data0);
-
- TemporaryBuffer.Heap pack = new TemporaryBuffer.Heap(64 * 1024);
- packHeader(pack, 4);
- objectHeader(pack, Constants.OBJ_BLOB, data0.length);
- deflate(pack, data0);
-
- byte[] data1 = clone(0x01, data0);
- byte[] delta1 = delta(data0, data1);
- ObjectId id1 = fmt.idFor(Constants.OBJ_BLOB, data1);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta1.length);
- id0.copyRawTo(pack);
- deflate(pack, delta1);
-
- byte[] data2 = clone(0x02, data1);
- byte[] delta2 = delta(data1, data2);
- ObjectId id2 = fmt.idFor(Constants.OBJ_BLOB, data2);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta2.length);
- id1.copyRawTo(pack);
- deflate(pack, delta2);
-
- byte[] data3 = clone(0x03, data2);
- byte[] delta3 = delta(data2, data3);
- ObjectId id3 = fmt.idFor(Constants.OBJ_BLOB, data3);
- objectHeader(pack, Constants.OBJ_REF_DELTA, delta3.length);
- id2.copyRawTo(pack);
- deflate(pack, delta3);
-
- digest(pack);
- PackParser ip = index(pack.toByteArray());
- ip.setAllowThin(true);
- ip.parse(NullProgressMonitor.INSTANCE);
-
- assertTrue("has blob", wc.has(id3));
-
- ObjectLoader ol = wc.open(id3);
- assertNotNull("created loader", ol);
- assertEquals(Constants.OBJ_BLOB, ol.getType());
- assertEquals(data3.length, ol.getSize());
- assertFalse("is large", ol.isLarge());
- assertNotNull(ol.getCachedBytes());
- assertArrayEquals(data3, ol.getCachedBytes());
-
- try (ObjectStream in = ol.openStream()) {
- assertNotNull("have stream", in);
- assertEquals(Constants.OBJ_BLOB, in.getType());
- assertEquals(data3.length, in.getSize());
- byte[] act = new byte[data3.length];
- IO.readFully(in, act, 0, data3.length);
- assertTrue("same content", Arrays.equals(act, data3));
- assertEquals("stream at EOF", -1, in.read());
- }
- }
- }
-
- @Test
- public void testDelta_FailsOver2GiB() throws Exception {
- try (ObjectInserter.Formatter fmt = new ObjectInserter.Formatter()) {
- byte[] base = new byte[] { 'a' };
- ObjectId idA = fmt.idFor(Constants.OBJ_BLOB, base);
- ObjectId idB = fmt.idFor(Constants.OBJ_BLOB, new byte[] { 'b' });
-
- PackedObjectInfo a = new PackedObjectInfo(idA);
- PackedObjectInfo b = new PackedObjectInfo(idB);
-
- TemporaryBuffer.Heap packContents = new TemporaryBuffer.Heap(64 * 1024);
- packHeader(packContents, 2);
- a.setOffset(packContents.length());
- objectHeader(packContents, Constants.OBJ_BLOB, base.length);
- deflate(packContents, base);
-
- ByteArrayOutputStream tmp = new ByteArrayOutputStream();
- DeltaEncoder de = new DeltaEncoder(tmp, base.length, 3L << 30);
- de.copy(0, 1);
- byte[] delta = tmp.toByteArray();
- b.setOffset(packContents.length());
- objectHeader(packContents, Constants.OBJ_REF_DELTA, delta.length);
- idA.copyRawTo(packContents);
- deflate(packContents, delta);
- byte[] footer = digest(packContents);
-
- File dir = new File(repo.getObjectDatabase().getDirectory(),
- "pack");
- File packName = new File(dir, idA.name() + ".pack");
- File idxName = new File(dir, idA.name() + ".idx");
-
- try (FileOutputStream f = new FileOutputStream(packName)) {
- f.write(packContents.toByteArray());
- }
-
- try (FileOutputStream f = new FileOutputStream(idxName)) {
- List<PackedObjectInfo> list = new ArrayList<>();
- list.add(a);
- list.add(b);
- Collections.sort(list);
- new PackIndexWriterV1(f).write(list, footer);
- }
-
- Pack pack = new Pack(packName, PackExt.INDEX.getBit());
- try {
- pack.get(wc, b);
- fail("expected LargeObjectException.ExceedsByteArrayLimit");
- } catch (LargeObjectException.ExceedsByteArrayLimit bad) {
- assertNull(bad.getObjectId());
- } finally {
- pack.close();
- }
- }
- }
-
- @Test
- public void testConfigurableStreamFileThreshold() throws Exception {
- byte[] data = getRng().nextBytes(300);
- RevBlob id = tr.blob(data);
- tr.branch("master").commit().add("A", id).create();
- tr.packAndPrune();
- assertTrue("has blob", wc.has(id));
-
- ObjectLoader ol = wc.open(id);
- try (ObjectStream in = ol.openStream()) {
- assertTrue(in instanceof ObjectStream.SmallStream);
- assertEquals(300, in.available());
- }
-
- wc.setStreamFileThreshold(299);
- ol = wc.open(id);
- try (ObjectStream in = ol.openStream()) {
- assertTrue(in instanceof ObjectStream.Filter);
- assertEquals(1, in.available());
- }
- }
-
- private static byte[] clone(int first, byte[] base) {
- byte[] r = new byte[base.length];
- System.arraycopy(base, 1, r, 1, r.length - 1);
- r[0] = (byte) first;
- return r;
- }
-
- private static byte[] delta(byte[] base, byte[] dest) throws IOException {
- ByteArrayOutputStream tmp = new ByteArrayOutputStream();
- DeltaEncoder de = new DeltaEncoder(tmp, base.length, dest.length);
- de.insert(dest, 0, 1);
- de.copy(1, base.length - 1);
- return tmp.toByteArray();
- }
-
- private static void packHeader(TemporaryBuffer.Heap pack, int cnt)
- throws IOException {
- final byte[] hdr = new byte[8];
- NB.encodeInt32(hdr, 0, 2);
- NB.encodeInt32(hdr, 4, cnt);
- pack.write(Constants.PACK_SIGNATURE);
- pack.write(hdr, 0, 8);
- }
-
- private static void objectHeader(TemporaryBuffer.Heap pack, int type, int sz)
- throws IOException {
- byte[] buf = new byte[8];
- int nextLength = sz >>> 4;
- buf[0] = (byte) ((nextLength > 0 ? 0x80 : 0x00) | (type << 4) | (sz & 0x0F));
- sz = nextLength;
- int n = 1;
- while (sz > 0) {
- nextLength >>>= 7;
- buf[n++] = (byte) ((nextLength > 0 ? 0x80 : 0x00) | (sz & 0x7F));
- sz = nextLength;
- }
- pack.write(buf, 0, n);
- }
-
- private static void deflate(TemporaryBuffer.Heap pack, byte[] content)
- throws IOException {
- final Deflater deflater = new Deflater();
- final byte[] buf = new byte[128];
- deflater.setInput(content, 0, content.length);
- deflater.finish();
- do {
- final int n = deflater.deflate(buf, 0, buf.length);
- if (n > 0)
- pack.write(buf, 0, n);
- } while (!deflater.finished());
- deflater.end();
- }
-
- private static byte[] digest(TemporaryBuffer.Heap buf)
- throws IOException {
- MessageDigest md = Constants.newMessageDigest();
- md.update(buf.toByteArray());
- byte[] footer = md.digest();
- buf.write(footer);
- return footer;
- }
-
- private ObjectInserter inserter;
-
- @After
- public void release() {
- if (inserter != null) {
- inserter.close();
- }
- }
-
- private PackParser index(byte[] raw) throws IOException {
- if (inserter == null)
- inserter = repo.newObjectInserter();
- return inserter.newPackParser(new ByteArrayInputStream(raw));
- }
- }
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