/*
* Copyright ( c ) 2019 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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* questions .
*
*/
import org.testng.annotations.Test;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Map;
import java.util.spi.ToolProvider;
import java.util.zip.CRC32;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
import static org.testng.Assert .*;
/**
* @ test
* @ bug 8229887
* @ summary Validate ZIP FileSystem can replace existing STORED and DEFLATED entries
* @ modules jdk . zipfs
* @ run testng UpdateEntryTest
*/
@Test
public class UpdateEntryTest {
private static final Path HERE = Path.of("." );
// Use the ToolProvider interface for accessing the jar tool
private static final ToolProvider JAR_TOOL = ToolProvider.findFirst("jar" )
.orElseThrow(() -> new RuntimeException("jar tool not found" )
);
/**
* Represents an entry in a ZIP file . An entry encapsulates a name , a
* compression method , and its contents / data .
*/
static class Entry {
private final String name;
private final int method;
private final byte [] bytes;
Entry(String name, int method, String contents) {
this .name = name;
this .method = method;
this .bytes = contents.getBytes(StandardCharsets.UTF_8);
}
static Entry of(String name, int method, String contents) {
return new Entry(name, method, contents);
}
/**
* Returns a new Entry with the same name and compression method as this
* Entry but with the given content .
*/
Entry content(String contents) {
return new Entry(name, method, contents);
}
/**
* Writes this entry to the given ZIP output stream .
*/
ZipEntry put(ZipOutputStream zos) throws IOException {
ZipEntry e = new ZipEntry(name);
e.setMethod(method);
e.setTime(System.currentTimeMillis());
if (method == ZipEntry.STORED) {
var crc = new CRC32();
crc.update(bytes);
e.setCrc(crc.getValue());
e.setSize(bytes.length);
}
zos.putNextEntry(e);
zos.write(bytes);
return e;
}
}
/**
* Validate that you can replace an existing entry in a JAR file that
* was added with the STORED ( no - compression ) option
*/
public void testReplaceStoredEntry() throws IOException {
String jarFileName = "updateStoredEntry.jar" ;
String storedFileName = "storedFile.txt" ;
String replacedValue = "bar" ;
Path zipFile = Path.of(jarFileName);
// Create JAR file with a STORED(non-compressed) entry
Files.writeString(Path.of(storedFileName), "foobar" );
JAR_TOOL.run(System.out, System.err,
"cM0vf" , jarFileName, storedFileName);
// Replace the STORED entry using the default(DEFLATED) compression
// method.
try (FileSystem fs = FileSystems.newFileSystem(zipFile)) {
Files.writeString(fs.getPath(storedFileName), replacedValue);
}
Entry e1 = Entry.of(storedFileName, ZipEntry.DEFLATED, replacedValue);
verify(zipFile, e1);
}
/**
* Test updating an entry that is STORED ( not compressed )
*/
public void test1() throws IOException {
Entry e1 = Entry.of("foo" , ZipEntry.STORED, "hello" );
Entry e2 = Entry.of("bar" , ZipEntry.STORED, "world" );
test(e1, e2);
}
/**
* Test updating an entry that is DEFLATED ( compressed )
*/
public void test2() throws IOException {
Entry e1 = Entry.of("foo" , ZipEntry.DEFLATED, "hello" );
Entry e2 = Entry.of("bar" , ZipEntry.STORED, "world" );
test(e1, e2);
}
private void test(Entry e1, Entry e2) throws IOException {
Path zipfile = Files.createTempFile(HERE, "test" , "zip" );
// create zip file
try (OutputStream out = Files.newOutputStream(zipfile);
ZipOutputStream zos = new ZipOutputStream(out)) {
e1.put(zos);
e2.put(zos);
}
verify(zipfile, e1, e2);
String newContents = "hi" ;
// Set the required compression method
Map<String, Boolean > map = Map.of("noCompression" ,
e1.method != ZipEntry.DEFLATED);
// replace contents of e1
try (FileSystem fs = FileSystems.newFileSystem(zipfile, map)) {
Path foo = fs.getPath(e1.name);
Files.writeString(foo, newContents);
}
verify(zipfile, e1.content(newContents), e2);
}
/**
* Verify that the given path is a zip files containing exactly the
* given entries .
*/
private static void verify(Path zipfile, Entry... entries) throws IOException {
// check entries with zip API
try (ZipFile zf = new ZipFile(zipfile.toFile())) {
// check entry count
assertTrue(zf.size() == entries.length);
// check compression method and content of each entry
for (Entry e : entries) {
ZipEntry ze = zf.getEntry(e.name);
assertTrue(ze != null );
assertTrue(ze.getMethod() == e.method);
try (InputStream in = zf.getInputStream(ze)) {
byte [] bytes = in.readAllBytes();
assertTrue(Arrays.equals(bytes, e.bytes));
}
}
}
// check entries with FileSystem API
try (FileSystem fs = FileSystems.newFileSystem(zipfile)) {
// check entry count
Path top = fs.getPath("/" );
long count = Files.find(top, Integer.MAX_VALUE,
(path, attrs) -> attrs.isRegularFile()).count();
assertTrue(count == entries.length);
// check content of each entry
for (Entry e : entries) {
Path file = fs.getPath(e.name);
byte [] bytes = Files.readAllBytes(file);
assertTrue(Arrays.equals(bytes, e.bytes));
}
}
}
}
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