public static bool IsZipMulti(Stream stream, string password = null)
{
StreamingZipHeaderFactory headerFactory = new StreamingZipHeaderFactory(password, new ArchiveEncoding());
try
{
ZipHeader header = headerFactory.ReadStreamHeader(stream).FirstOrDefault(x => x.ZipHeaderType != ZipHeaderType.Split);
if (header is null)
{
if (stream.CanSeek) //could be multipart. Test for central directory - might not be z64 safe
{
SeekableZipHeaderFactory z = new SeekableZipHeaderFactory(password, new ArchiveEncoding());
var x = z.ReadSeekableHeader(stream).FirstOrDefault();
return(x?.ZipHeaderType == ZipHeaderType.DirectoryEntry);
}
else
{
return(false);
}
}
return(Enum.IsDefined(typeof(ZipHeaderType), header.ZipHeaderType));
}
catch (CryptographicException)
{
return(true);
}
catch
{
return(false);
}
}
internal override IEnumerable <ZipEntry> GetEntries(Stream stream)
{
foreach (ZipHeader h in headerFactory.ReadStreamHeader(stream))
{
if (h != null)
{
switch (h.ZipHeaderType)
{
case ZipHeaderType.LocalEntry: {
yield return(new ZipEntry(new StreamingZipFilePart(h as LocalEntryHeader,
stream)));
}
break;
case ZipHeaderType.DirectoryEnd: {
yield break;
}
}
}
}
}
public static bool IsZipFile(Stream stream, string password = null)
{
StreamingZipHeaderFactory headerFactory = new StreamingZipHeaderFactory(password, new ArchiveEncoding());
try
{
ZipHeader header = headerFactory.ReadStreamHeader(stream).FirstOrDefault(x => x.ZipHeaderType != ZipHeaderType.Split);
if (header is null)
{
return(false);
}
return(Enum.IsDefined(typeof(ZipHeaderType), header.ZipHeaderType));
}
catch (CryptographicException)
{
return(true);
}
catch
{
return(false);
}
}
public static bool IsZipFile(Stream stream, string password)
{
StreamingZipHeaderFactory factory = new StreamingZipHeaderFactory(password);
try
{
ZipHeader header = Enumerable.FirstOrDefault <ZipHeader>(factory.ReadStreamHeader(stream), delegate(ZipHeader x) {
return(x.ZipHeaderType != ZipHeaderType.Split);
});
if (header == null)
{
return(false);
}
return(Enum.IsDefined(typeof(ZipHeaderType), header.ZipHeaderType));
}
catch (CryptographicException)
{
return(true);
}
catch
{
return(false);
}
}
