Compress an InputStream with gzip

Question

I would like to compress an input stream in java using Gzip compression.

Let\'s say we have an input stream (1GB of data..) not compressed. I want as a result a comp

Answer 1

PipedOutputStream lets you write to a GZIPOutputStream and expose that data through an InputStream. It has a fixed memory cost, unlike other solutions which buffer the entire stream of data to an array or file. Only problem is you can't read and write from the same Thread, you have to use a separate one.

private InputStream gzipInputStream(InputStream in) throws IOException {
    PipedInputStream zipped = new PipedInputStream();
    PipedOutputStream pipe = new PipedOutputStream(zipped);
    new Thread(
            () -> {
                try(OutputStream zipper = new GZIPOutputStream(pipe)){
                    IOUtils.copy(in, zipper);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
    ).start();
    return zipped;
}