GzipCompressorInputStream Input is not in the .gz format

Question

I'm tha maintainer of https://github.com/compress4j/compress4j and writing a new framework to add some more features.

I have hit a problem in Gzip test cases in TarGzCompressorTest are failing with java.io.IOException: Input is not in the .gz format, I've manually verified the gz files produces by the test case, they are valid and I can extract them by tar -xzvf test.tar.gz.

Any ideas/pointers?

Answer 1

I've the problem, I don't know what I was thinking but I had to much code

InputStream input = new BufferedInputStream(sourceStream);
        try {
            input = new CompressorStreamFactory().createCompressorInputStream(input);
        } catch (CompressorException e) {
            Throwable cause = e.getCause();
            if (cause instanceof IOException ioException) throw ioException;
        }
        archiveInputStream = this.buildArchiveInputStream(input);

I was creating a CompressorInputStream and passing that into the ArchiveInputStream and causing the problem.

Fix was to just to pass the source stream directly, as follows

archiveInputStream = this.buildArchiveInputStream(sourceStream);