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Allow prefixed bytes with fat JARs

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Update `spring-boot-loader` ZIP processing code to support prefixed
bytes within the fat jar. This technique allows a bash script to be
embedded at the start of the JAR whilst still allowing `java -jar`
execution.

Fixes gh-1073
This commit is contained in:
Phillip Webb
2014-06-13 08:58:05 -07:00
parent a374929c90
commit 54dc46f777
3 changed files with 47 additions and 4 deletions
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19
spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/jar/JarFileTests.java
View File

@@ -17,11 +17,14 @@
package org.springframework.boot.loader.jar;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.Manifest;
@@ -35,6 +38,8 @@ import org.junit.rules.TemporaryFolder;
import org.springframework.boot.loader.TestJarCreator;
import org.springframework.boot.loader.data.RandomAccessDataFile;
import org.springframework.boot.loader.util.AsciiBytes;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.StreamUtils;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;
@@ -389,4 +394,18 @@ public class JarFileTests {
}
jarFile.close();
}
@Test
public void jarFileWithScriptAtTheStart() throws Exception {
File file = this.temporaryFolder.newFile();
InputStream sourceJarContent = new FileInputStream(this.rootJarFile);
FileOutputStream outputStream = new FileOutputStream(file);
StreamUtils.copy("#/bin/bash", Charset.defaultCharset(), outputStream);
FileCopyUtils.copy(sourceJarContent, outputStream);
this.rootJarFile = file;
this.jarFile = new JarFile(file);
// Call some other tests to verify
getEntries();
getNestedJarFile();
}
}