io.split.engine.sse.utils.DecompressionUtil Maven / Gradle / Ivy
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package io.split.engine.sse.utils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.DataFormatException;
import java.util.zip.GZIPInputStream;
import java.util.zip.Inflater;
public class DecompressionUtil {
public static byte[] zLibDecompress(byte[] toDecompress) throws DataFormatException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(toDecompress.length);
Inflater decompressor = new Inflater();
try {
decompressor.setInput(toDecompress);
final byte[] buf = new byte[toDecompress.length];
while (!decompressor.finished()) {
int count = decompressor.inflate(buf);
byteArrayOutputStream.write(buf, 0, count);
}
} finally {
decompressor.end();
}
return byteArrayOutputStream.toByteArray();
}
public static byte[] gZipDecompress(byte[] toDecompress) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
try (GZIPInputStream gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(toDecompress))){
int res = 0;
byte buf[] = new byte[toDecompress.length];
while (res >= 0) {
res = gzipInputStream.read(buf, 0, buf.length);
if (res > 0) {
out.write(buf, 0, res);
}
}
}
return out.toByteArray();
}
}