private static FileType CheckFileType(EndianBinaryReader reader)
{
//去除新版前8个空字节
bool haveNullByte = false;
var b = reader.PeekChar();
if (b == 0)
{
reader.ReadBytes(8);
haveNullByte = true;
}
var signature = reader.ReadStringToNull(20);
if (!haveNullByte)
{
reader.Position = 0;
}
else
{
reader.Position = 8;
}
switch (signature)
{
case "UnityWeb":
case "UnityRaw":
case "\xFA\xFA\xFA\xFA\xFA\xFA\xFA\xFA":
case "UnityFS":
return(FileType.BundleFile);
case "UnityWebData1.0":
return(FileType.WebFile);
default:
{
var magic = reader.ReadBytes(2);
reader.Position = 0;
if (WebFile.gzipMagic.SequenceEqual(magic))
{
return(FileType.WebFile);
}
reader.Position = 0x20;
magic = reader.ReadBytes(6);
reader.Position = 0;
if (WebFile.brotliMagic.SequenceEqual(magic))
{
return(FileType.WebFile);
}
return(FileType.AssetsFile);
}
}
}
