undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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test/jdk/java/nio/channels/FileChannel/TransferToChannel.java
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test/jdk/java/nio/channels/FileChannel/TransferToChannel.java
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/*
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* Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 4652496 8274112
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* @summary Test transferTo with different target channels
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* @library /test/lib
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* @build jdk.test.lib.RandomFactory
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* @run main TransferToChannel
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* @run main/othervm -Djdk.nio.enableFastFileTransfer TransferToChannel
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* @key randomness
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*/
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.nio.channels.WritableByteChannel;
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import java.nio.file.Files;
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import java.util.Arrays;
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import java.util.Random;
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import jdk.test.lib.RandomFactory;
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public class TransferToChannel {
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private static final Random RAND = RandomFactory.getRandom();
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// Chunk size should be larger than FileChannelImpl.TRANSFER_SIZE (8192)
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// for a good test
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private static final int CHUNK_SIZE = 9*1024;
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// File size should be a value much larger than CHUNK_SIZE
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private static final int FILE_SIZE = 1000*1024;
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// The minimum direct transfer size should be less than the file size
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// but still substantial
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private static final int MIN_DIRECT_TRANSFER_SIZE = FILE_SIZE/2;
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private static File file;
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private static File outFile;
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private static FileChannel in;
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public static void main(String[] args) throws Exception {
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file = File.createTempFile("readingin", null);
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outFile = File.createTempFile("writingout", null);
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file.deleteOnExit();
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outFile.deleteOnExit();
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generateBigFile(file);
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FileInputStream fis = new FileInputStream(file);
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in = fis.getChannel();
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test1();
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test2();
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test3();
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in.close();
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file.delete();
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outFile.delete();
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}
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private static void test1() throws Exception {
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for (int i=0; i<10; i++) {
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transferFileToUserChannel();
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System.gc();
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System.err.println("Transferred file to user channel...");
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}
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}
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private static void test2() throws Exception {
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for (int i=0; i<10; i++) {
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transferFileToTrustedChannel();
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System.gc();
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System.err.println("Transferred file to trusted channel...");
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}
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}
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private static void test3() throws Exception {
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for (int i=0; i<10; i++) {
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transferFileDirectly();
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System.gc();
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System.err.println("Transferred file directly...");
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}
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}
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private static void transferFileToUserChannel() throws Exception {
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long remainingBytes = in.size();
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long size = remainingBytes;
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WritableByteChannel wbc = new WritableByteChannel() {
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Random rand = new Random(0);
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public int write(ByteBuffer src) throws IOException {
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int read = src.remaining();
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byte[] incoming = new byte[read];
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src.get(incoming);
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checkData(incoming, read);
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return read == 0 ? -1 : read;
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}
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public boolean isOpen() {
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return true;
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}
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public void close() throws IOException {
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}
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void checkData(byte[] incoming, int size) {
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byte[] expected = new byte[size];
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rand.nextBytes(expected);
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if (!Arrays.equals(incoming, expected))
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throw new RuntimeException("Data corrupted");
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}
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};
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while (remainingBytes > 0) {
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long bytesTransferred = in.transferTo(size - remainingBytes,
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Math.min(CHUNK_SIZE, remainingBytes), wbc);
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if (bytesTransferred >= 0)
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remainingBytes -= bytesTransferred;
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else
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throw new Exception("transfer failed");
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}
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}
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private static void transferFileToTrustedChannel() throws Exception {
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long remainingBytes = in.size();
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long size = remainingBytes;
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FileOutputStream fos = new FileOutputStream(outFile);
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FileChannel out = fos.getChannel();
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while (remainingBytes > 0) {
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long bytesTransferred = in.transferTo(size - remainingBytes,
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CHUNK_SIZE, out);
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if (bytesTransferred >= 0)
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remainingBytes -= bytesTransferred;
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else
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throw new Exception("transfer failed");
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}
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out.close();
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}
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private static void transferFileDirectly() throws Exception {
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outFile.delete();
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final long size = in.size();
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final long position = RAND.nextInt((int)size - MIN_DIRECT_TRANSFER_SIZE);
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try (FileOutputStream fos = new FileOutputStream(outFile);
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FileChannel out = fos.getChannel()) {
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assert out.position() == 0;
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long pos = position;
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while (pos < size) {
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long bytesTransferred = in.transferTo(pos, Long.MAX_VALUE, out);
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if (bytesTransferred >= 0)
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pos += bytesTransferred;
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else {
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throw new Exception("transfer failed at " + pos +
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" / " + size);
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}
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}
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}
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byte[] expected = Files.readAllBytes(file.toPath());
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byte[] actual = Files.readAllBytes(outFile.toPath());
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if (!Arrays.equals(expected, (int)position, (int)size,
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actual, 0, (int)(size - position)))
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throw new Exception("Actual bytes do not match expected bytes");
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}
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private static void generateBigFile(File file) throws Exception {
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OutputStream out = new BufferedOutputStream(
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new FileOutputStream(file));
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byte[] randomBytes = new byte[1024];
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Random rand = new Random(0);
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int numWritten = 0;
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while (numWritten < FILE_SIZE) {
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int nwrite = Math.min(randomBytes.length, FILE_SIZE - numWritten);
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rand.nextBytes(randomBytes);
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out.write(randomBytes, 0, nwrite);
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numWritten += nwrite;
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}
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out.flush();
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out.close();
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}
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}
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