I'm trying to add functionality to a project to append an entry to an
existing archive, but am not having success. Specifically, the feature
seeks to add or replace an existing entry in an archive. What I've
attempted so far is:
---8<[snip]---
@Override
protected void doSaveEntry(
final String archiveFilename, final String entryName, final
byte[] content) {
try (ZipArchiveOutputStream archive =
new ZipArchiveOutputStream(new
FileOutputStream(archiveFilename, true))) {
log.trace("Creating archive entry");
final ZipArchiveEntry archiveEntry = new ZipArchiveEntry(entryName);
archiveEntry.setSize(content.length);
log.trace("Adding entry to archive");
archive.putArchiveEntry(archiveEntry);
log.trace("Copying content to entry");
IOUtils.copy(new ByteArrayInputStream(content), archive);
archive.closeArchiveEntry();
archive.finish();
} catch (IOException error) {
log.trace("Failed to add entry to archive", error);
}
}
---8<[snip]---
After running the code, I try to read from the archive. What I get
then is the following exception:
---8<[snip]---
java.io.IOException: Error on ZipFile
/Users/mcpierce/Repositories/comixed/comixed-adaptors/target/test-classes/save-example.cbz
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:383)
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:261)
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:230)
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:213)
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:174)
at
org.comixedproject.adaptors.archive.NewZipArchiveAdaptor.doOpenArchive(NewZipArchiveAdaptor.java:50)
at
org.comixedproject.adaptors.archive.NewZipArchiveAdaptor.doOpenArchive(NewZipArchiveAdaptor.java:42)
at
org.comixedproject.adaptors.archive.AbstractNewArchiveAdaptor.openArchive(AbstractNewArchiveAdaptor.java:37)
at
org.comixedproject.adaptors.archive.NewZipArchiveAdaptorTest.testSaveEntry(NewZipArchiveAdaptorTest.java:95)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at
org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at
org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at
org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at
org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at
org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at
org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.io.IOException: Central directory is empty, can't
expand corrupt archive.
at
org.apache.commons.compress.archivers.zip.ZipFile.populateFromCentralDirectory(ZipFile.java:721)
at
org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:376)
... 39 more
---8<[snip]---
What am I doing wrong and how do I fix it so that the new entry is
appended to the archive?
--
Darryl L. Pierce <[email protected]>
"Le centre du monde est partout." - Blaise Pascal
"Let's try and find some point of transcendence and leap together." -
Gord Downie
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