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Create new JarFile instance for URL connections

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Update `JarURLConnection` to ensure that when connections are opened
a new copy of the JarFile is provided.

Prior to this commit, a single `JarFile` instance was shared which meant
that it could be accidental closed if accessed via
`JarURLConnection.getJarFile()`. If the underlying jar file is closed
then it's possible for a `NoClassDefFoundError` to be thrown if running
on JDK 11 with an active `SecurityManager`.

Closes gh-17796
This commit is contained in:
Phillip Webb 2020-04-21 16:08:54 -07:00
parent 6011470ba6
commit c85918b8b3
4 changed files with 60 additions and 19 deletions
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46
spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -60,6 +60,8 @@ public class JarFile extends java.util.jar.JarFile {
private static final AsciiBytes SIGNATURE_FILE_EXTENSION = new AsciiBytes(".SF");
private final JarFile parent;
private final RandomAccessDataFile rootFile;
private final String pathFromRoot;
@ -100,6 +102,27 @@ public class JarFile extends java.util.jar.JarFile {
this(file, "", file, JarFileType.DIRECT);
}
/**
* Create a new JarFile copy based on a given parent.
* @param parent the parent jar
* @throws IOException if the file cannot be read
*/
JarFile(JarFile parent) throws IOException {
super(parent.rootFile.getFile());
this.parent = parent;
this.rootFile = parent.rootFile;
this.pathFromRoot = parent.pathFromRoot;
this.data = parent.data;
this.type = parent.type;
this.url = parent.url;
this.urlString = parent.urlString;
this.entries = parent.entries;
this.manifestSupplier = parent.manifestSupplier;
this.manifest = parent.manifest;
this.signed = parent.signed;
this.comment = parent.comment;
}
/**
* Private constructor used to create a new {@link JarFile} either directly or from a
* nested entry.
@ -111,12 +134,13 @@ public class JarFile extends java.util.jar.JarFile {
*/
private JarFile(RandomAccessDataFile rootFile, String pathFromRoot, RandomAccessData data, JarFileType type)
throws IOException {
this(rootFile, pathFromRoot, data, null, type, null);
this(null, rootFile, pathFromRoot, data, null, type, null);
}
private JarFile(RandomAccessDataFile rootFile, String pathFromRoot, RandomAccessData data, JarEntryFilter filter,
JarFileType type, Supplier<Manifest> manifestSupplier) throws IOException {
private JarFile(JarFile parent, RandomAccessDataFile rootFile, String pathFromRoot, RandomAccessData data,
JarEntryFilter filter, JarFileType type, Supplier<Manifest> manifestSupplier) throws IOException {
super(rootFile.getFile());
this.parent = parent;
this.rootFile = rootFile;
this.pathFromRoot = pathFromRoot;
CentralDirectoryParser parser = new CentralDirectoryParser();
@ -166,6 +190,10 @@ public class JarFile extends java.util.jar.JarFile {
};
}
JarFile getParent() {
return this.parent;
}
protected final RandomAccessDataFile getRootJarFile() {
return this.rootFile;
}
@ -277,8 +305,9 @@ public class JarFile extends java.util.jar.JarFile {
}
return null;
};
return new JarFile(this.rootFile, this.pathFromRoot + "!/" + entry.getName().substring(0, name.length() - 1),
this.data, filter, JarFileType.NESTED_DIRECTORY, this.manifestSupplier);
return new JarFile(this, this.rootFile,
this.pathFromRoot + "!/" + entry.getName().substring(0, name.length() - 1), this.data, filter,
JarFileType.NESTED_DIRECTORY, this.manifestSupplier);
}
private JarFile createJarFileFromFileEntry(JarEntry entry) throws IOException {
@ -306,7 +335,7 @@ public class JarFile extends java.util.jar.JarFile {
@Override
public void close() throws IOException {
super.close();
if (this.type == JarFileType.DIRECT) {
if (this.type == JarFileType.DIRECT && this.parent == null) {
this.rootFile.close();
}
}
@ -326,10 +355,9 @@ public class JarFile extends java.util.jar.JarFile {
*/
public URL getUrl() throws MalformedURLException {
if (this.url == null) {
Handler handler = new Handler(this);
String file = this.rootFile.getFile().toURI() + this.pathFromRoot + "!/";
file = file.replace("file:////", "file://"); // Fix UNC paths
this.url = new URL("jar", "", -1, file, handler);
this.url = new URL("jar", "", -1, file, new Handler(this));
}
return this.url;
}

4
spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarURLConnection.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -266,7 +266,7 @@ final class JarURLConnection extends java.net.JarURLConnection {
&& !jarFile.containsEntry(jarEntryName.toString())) {
return NOT_FOUND_CONNECTION;
}
return new JarURLConnection(url, jarFile, jarEntryName);
return new JarURLConnection(url, new JarFile(jarFile), jarEntryName);
}
private static int indexOfRootSpec(StringSequence file, String pathFromRoot) {

10
spring-boot-project/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/jar/JarFileTests.java
View File

@ -205,10 +205,10 @@ public class JarFileTests {
URL url = this.jarFile.getUrl();
assertThat(url.toString()).isEqualTo("jar:" + this.rootJarFile.toURI() + "!/");
JarURLConnection jarURLConnection = (JarURLConnection) url.openConnection();
assertThat(jarURLConnection.getJarFile()).isSameAs(this.jarFile);
assertThat(jarURLConnection.getJarFile().getParent()).isSameAs(this.jarFile);
assertThat(jarURLConnection.getJarEntry()).isNull();
assertThat(jarURLConnection.getContentLength()).isGreaterThan(1);
assertThat(jarURLConnection.getContent()).isSameAs(this.jarFile);
assertThat(((JarFile) jarURLConnection.getContent()).getParent()).isSameAs(this.jarFile);
assertThat(jarURLConnection.getContentType()).isEqualTo("x-java/jar");
assertThat(jarURLConnection.getJarFileURL().toURI()).isEqualTo(this.rootJarFile.toURI());
}
@ -218,7 +218,7 @@ public class JarFileTests {
URL url = new URL(this.jarFile.getUrl(), "1.dat");
assertThat(url.toString()).isEqualTo("jar:" + this.rootJarFile.toURI() + "!/1.dat");
JarURLConnection jarURLConnection = (JarURLConnection) url.openConnection();
assertThat(jarURLConnection.getJarFile()).isSameAs(this.jarFile);
assertThat(jarURLConnection.getJarFile().getParent()).isSameAs(this.jarFile);
assertThat(jarURLConnection.getJarEntry()).isSameAs(this.jarFile.getJarEntry("1.dat"));
assertThat(jarURLConnection.getContentLength()).isEqualTo(1);
assertThat(jarURLConnection.getContent()).isInstanceOf(InputStream.class);
@ -273,7 +273,7 @@ public class JarFileTests {
URL url = nestedJarFile.getUrl();
assertThat(url.toString()).isEqualTo("jar:" + this.rootJarFile.toURI() + "!/nested.jar!/");
JarURLConnection conn = (JarURLConnection) url.openConnection();
assertThat(conn.getJarFile()).isSameAs(nestedJarFile);
assertThat(conn.getJarFile().getParent()).isSameAs(nestedJarFile);
assertThat(conn.getJarFileURL().toString()).isEqualTo("jar:" + this.rootJarFile.toURI() + "!/nested.jar");
assertThat(conn.getInputStream()).isNotNull();
JarInputStream jarInputStream = new JarInputStream(conn.getInputStream());
@ -301,7 +301,7 @@ public class JarFileTests {
URL url = nestedJarFile.getUrl();
assertThat(url.toString()).isEqualTo("jar:" + this.rootJarFile.toURI() + "!/d!/");
assertThat(((JarURLConnection) url.openConnection()).getJarFile()).isSameAs(nestedJarFile);
assertThat(((JarURLConnection) url.openConnection()).getJarFile().getParent()).isSameAs(nestedJarFile);
}
@Test

19
spring-boot-project/spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/jar/JarURLConnectionTests.java
View File

@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -20,6 +20,7 @@ import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.net.URL;
import java.util.zip.ZipFile;
import org.junit.Before;
import org.junit.Rule;
@ -28,6 +29,7 @@ import org.junit.rules.TemporaryFolder;
import org.springframework.boot.loader.TestJarCreator;
import org.springframework.boot.loader.jar.JarURLConnection.JarEntryName;
import org.springframework.test.util.ReflectionTestUtils;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
@ -58,13 +60,15 @@ public class JarURLConnectionTests {
@Test
public void connectionToRootUsingAbsoluteUrl() throws Exception {
URL url = new URL("jar:" + this.rootJarFile.toURI().toURL() + "!/");
assertThat(JarURLConnection.get(url, this.jarFile).getContent()).isSameAs(this.jarFile);
Object content = JarURLConnection.get(url, this.jarFile).getContent();
assertThat(((JarFile) content).getParent()).isSameAs(this.jarFile);
}
@Test
public void connectionToRootUsingRelativeUrl() throws Exception {
URL url = new URL("jar:file:" + getRelativePath() + "!/");
assertThat(JarURLConnection.get(url, this.jarFile).getContent()).isSameAs(this.jarFile);
Object content = JarURLConnection.get(url, this.jarFile).getContent();
assertThat(((JarFile) content).getParent()).isSameAs(this.jarFile);
}
@Test
@ -191,6 +195,15 @@ public class JarURLConnectionTests {
.isEqualTo("\u00e1/b/\u00c7.class");
}
@Test
public void openConnectionCanBeClosedWithoutClosingSourceJar() throws Exception {
URL url = new URL("jar:" + this.rootJarFile.toURI().toURL() + "!/");
JarURLConnection connection = JarURLConnection.get(url, this.jarFile);
JarFile connectionJarFile = connection.getJarFile();
connectionJarFile.close();
assertThat((Boolean) ReflectionTestUtils.getField(this.jarFile, ZipFile.class, "closeRequested")).isFalse();
}
private String getRelativePath() {
return this.rootJarFile.getPath().replace('\\', '/');
}