Describe the bug
When opening an old rar v2 file as a stream, an exception occurs when parsing headers, since the file does not have an EndArcHeader and the stream length is defined as Long.MAX_VALUE.

To Reproduce

  try (InputStream is = getClass().getResourceAsStream("audio/BoatModernEnglish-audio-text-unpack20.rar")) {
                try (Archive archive = new Archive(is)) {
...

Expected behavior
No Exception

File
src/test/resources/com/github/junrar/audio/BoatModernEnglish-audio-text-unpack20.rar

Environment (please complete the following information):

• OS: [Linux]
• Junrar version: [7.5.5]

Additional context
May be change InputStreamVolume/getLength to

public long getLength() {
        try {
            return inputStream.available();
        } catch (IOException e) {
            return Long.MAX_VALUE;
        }
    }

?