public XmlWindowsImageMetadata Load(Stream stream)
{
Log.Verbose("Getting WIM stream");
WimMetadata metadata;
try
{
metadata = (WimMetadata)Serializer.Deserialize(GetXmlMetadataStream(stream));
}
catch (InvalidOperationException e)
{
throw new InvalidWimFileException("Could not read the metadata from the WIM file. Please, check it's a valid .WIM file", e);
}
Log.Verbose("Wim metadata deserialized correctly {@Metadata}", metadata);
return(new XmlWindowsImageMetadata
{
Images = metadata.Images.Select(x => new DiskImageMetadata
{
Architecture = WindowsImageMetadataReader.GetArchitecture(x.Windows.Arch),
Build = x.Windows.Version.Build,
DisplayName = x.Name,
Index = int.Parse(x.Index)
}).ToList()
});
}
protected override Stream GetXmlMetadataStream(Stream wim)
{
var outputstream = new MemoryStream();
var wimwriter = new BinaryWriter(outputstream);
using (var wimsecstream = wim)
{
using (var wimsecreader = new BinaryReader(wimsecstream))
{
var bytes = new byte[]
{
0x4D, 0x53, 0x57, 0x49, 0x4D
};
Log.Verbose("(WIM) Finding Magic Bytes...");
var start = WindowsImageMetadataReader.FindPosition(wimsecstream, bytes);
Log.Verbose("(WIM) Found Magic Bytes at " + start);
Log.Verbose("(WIM) Finding WIM XML Data...");
var endbytes = new byte[]
{
0x3C, 0x00, 0x2F, 0x00, 0x57, 0x00, 0x49, 0x00, 0x4D, 0x00, 0x3E, 0x00
};
wimsecstream.Seek(start + 72, SeekOrigin.Begin);
var buffer = new byte[24];
wimsecstream.Read(buffer, 0, 24);
var may = WindowsImageMetadataReader.ToInt64LittleEndian(buffer, 8);
wimsecstream.Seek(start, SeekOrigin.Begin);
Log.Verbose("(WIM) Found WIM XML Data at " + start + may + 2);
wimsecstream.Seek(start + may + 2, SeekOrigin.Begin);
for (var i = wimsecstream.Position; i < wimsecstream.Length - endbytes.Length; i++)
{
if (BitConverter.ToString(wimsecreader.ReadBytes(12)) == BitConverter.ToString(endbytes))
{
wimwriter.Write(endbytes);
break;
}
wimsecstream.Seek(-12, SeekOrigin.Current);
wimwriter.Write(wimsecreader.ReadBytes(1));
}
}
}
outputstream.Seek(0, SeekOrigin.Begin);
return(outputstream);
}
