static Func <bool> GzipFinished([NotNull] GZipStream ins)
{
try
{
var g = ins.GetType().GetField("deflateStream", BindingFlags.Instance | BindingFlags.NonPublic);
if (g == null)
{
return(null);
}
var s = (DeflateStream)g.GetValue(ins);
if (s == null)
{
return(null);
}
var f = s.GetType().GetField("inflater", BindingFlags.Instance | BindingFlags.NonPublic);
if (f == null)
{
return(null);
}
var fo = f.GetValue(s);
var avf = fo?.GetType().GetProperty("AvailableOutput");
var bterm = fo?.GetType().GetField("bfinal", BindingFlags.Instance | BindingFlags.NonPublic);
if (avf == null || bterm == null)
{
return(null);
}
return(() =>
(int?)avf.GetValue(fo, new object[0]) == 0 && // no more data in decode buffer
(int?)bterm.GetValue(fo) == 1); // have reached end of stream
}
catch (Exception)
{
return(null);
}
}
public void Zlib_DisposedException_GZipStream()
{
string TextToCompress = IhaveaDream;
MemoryStream ms1= new MemoryStream();
Stream compressor= new GZipStream(ms1, CompressionMode.Compress, false);
TestContext.WriteLine("Text to compress is {0} bytes: '{1}'",
TextToCompress.Length, TextToCompress);
TestContext.WriteLine("using compressor: {0}", compressor.GetType().FullName);
StreamWriter sw = new StreamWriter(compressor, Encoding.ASCII);
sw.Write(TextToCompress);
sw.Close(); // implicitly closes compressor
sw.Close(); // implicitly closes compressor, again
compressor.Close(); // explicitly closes compressor
var a = ms1.ToArray();
TestContext.WriteLine("Compressed stream is {0} bytes long", a.Length);
var ms2 = new MemoryStream(a);
Stream decompressor = new GZipStream(ms2, CompressionMode.Decompress, false);
TestContext.WriteLine("using decompressor: {0}", decompressor.GetType().FullName);
var sr = new StreamReader(decompressor, Encoding.ASCII);
string DecompressedText = sr.ReadToEnd();
sr.Close();
TestContext.WriteLine("decompressor.CanRead = {0}",decompressor.CanRead);
TestContext.WriteLine("Read {0} characters: '{1}'", DecompressedText.Length, DecompressedText);
TestContext.WriteLine("\n");
Assert.AreEqual<String>(TextToCompress, DecompressedText);
}