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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.application.pkg;
import com.yahoo.vespa.archive.ArchiveStreamReader;
import com.yahoo.vespa.archive.ArchiveStreamReader.ArchiveFile;
import com.yahoo.vespa.archive.ArchiveStreamReader.Options;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
/**
* A list of entries read from a ZIP archive, and their contents.
*
* @author bratseth
*/
public class ZipEntries {
private final List<ZipEntryWithContent> entries;
private ZipEntries(List<ZipEntryWithContent> entries) {
this.entries = List.copyOf(Objects.requireNonNull(entries));
}
/** Read ZIP entries from inputStream */
public static ZipEntries from(byte[] zip, Predicate<String> entryNameMatcher, int maxEntrySizeInBytes, boolean throwIfEntryExceedsMaxSize) {
Options options = Options.standard()
.pathPredicate(entryNameMatcher)
.maxSize(2L << 30) // 2 GB
.maxEntrySize(maxEntrySizeInBytes)
.maxEntries(1024)
.truncateEntry(!throwIfEntryExceedsMaxSize);
List<ZipEntryWithContent> entries = new ArrayList<>();
try (ArchiveStreamReader reader = ArchiveStreamReader.ofZip(new ByteArrayInputStream(zip), options)) {
ArchiveFile file;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while ((file = reader.readNextTo(baos)) != null) {
entries.add(new ZipEntryWithContent(file.path().toString(),
Optional.of(baos.toByteArray()).filter(b -> b.length > 0),
file.size()));
baos.reset();
}
}
return new ZipEntries(entries);
}
public static byte[] readFile(byte[] zip, String name, int maxEntrySizeInBytes) {
return from(zip, name::equals, maxEntrySizeInBytes, true).asList().get(0).contentOrThrow();
}
public List<ZipEntryWithContent> asList() { return entries; }
public static class ZipEntryWithContent {
private final String name;
private final Optional<byte[]> content;
private final long size;
public ZipEntryWithContent(String name, Optional<byte[]> content, long size) {
this.name = name;
this.content = content;
this.size = size;
}
public String name() { return name; }
public byte[] contentOrThrow() { return content.orElseThrow(() -> new NoSuchElementException("'" + name + "' has no content")); }
public Optional<byte[]> content() { return content; }
public long size() { return size; }
}
}
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