public static bool IsZipFile(Stream stream)
{
try
{
ZipHeader header = ZipHeaderFactory.ReadHeaderNonseekable(stream).FirstOrDefault();
if (header == null)
{
return(false);
}
return(Enum.IsDefined(typeof(ZipHeaderType), header.ZipHeaderType));
}
catch
{
return(false);
}
}
protected override IEnumerable <ZipArchiveEntry> LoadEntries(IEnumerable <ZipVolume> volumes)
{
foreach (ZipHeader h in ZipHeaderFactory.ReadHeaderNonseekable(volumes.Single().Stream))
{
if (h != null)
{
switch (h.ZipHeaderType)
{
case ZipHeaderType.LocalEntry:
{
yield return(new ZipArchiveEntry(new ZipFilePart(h as LocalEntryHeader)));
}
break;
case ZipHeaderType.DirectoryEnd:
{
yield break;
}
}
}
}
}
internal override IEnumerable <ZipEntry> GetEntries(Stream stream, Options options)
{
foreach (ZipHeader h in ZipHeaderFactory.ReadHeaderNonseekable(stream))
{
if (h != null)
{
switch (h.ZipHeaderType)
{
case ZipHeaderType.LocalEntry:
{
yield return(new ZipEntry(new ZipFilePart(h as LocalEntryHeader)));
}
break;
case ZipHeaderType.DirectoryEnd:
{
yield break;
}
}
}
}
}