static string[] GetExcludeList( ContentServerClient.StorageSession session, Steam2Manifest manifest )
{
string[] excludeList = null;
for ( int x = 0 ; x < manifest.Nodes.Count ; ++x )
{
var dirEntry = manifest.Nodes[ x ];
if ( dirEntry.Name == "exclude.lst" &&
dirEntry.FullName.StartsWith( "reslists" + Path.DirectorySeparatorChar ) &&
( dirEntry.Attributes & Steam2Manifest.Node.Attribs.EncryptedFile ) == 0 )
{
string excludeFile = Encoding.UTF8.GetString( session.DownloadFile( dirEntry ) );
if ( Environment.OSVersion.Platform == PlatformID.Win32NT )
excludeFile = excludeFile.Replace( '/', Path.DirectorySeparatorChar );
else
excludeFile = excludeFile.Replace( '\\', Path.DirectorySeparatorChar );
excludeList = excludeFile.Split( new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries );
break;
}
}
return excludeList;
}
/// <summary>
/// Downloads a specific file from the Steam servers.
/// </summary>
/// <param name="file">The file to download, given from the manifest.</param>
/// <param name="priority">The download priority.</param>
/// <param name="cryptKey">The AES encryption key used for any encrypted files.</param>
/// <returns>A byte array representing the file.</returns>
public byte[] DownloadFile( Steam2Manifest.Node file, DownloadPriority priority = DownloadPriority.Low, byte[] cryptKey = null )
{
if ( ( file.Attributes & Steam2Manifest.Node.Attribs.EncryptedFile ) != 0 && cryptKey == null )
{
throw new Steam2Exception( string.Format( "AES encryption key required for file: {0}", file.FullName ) );
}
const uint MaxParts = 16;
uint numFileparts = ( uint )Math.Ceiling( ( float )file.SizeOrCount / ( float )file.Parent.BlockSize );
uint numChunks = ( uint )Math.Ceiling( ( float )numFileparts / ( float )MaxParts );
MemoryStream ms = new MemoryStream();
for ( uint x = 0 ; x < numChunks ; ++x )
{
byte[] filePart = DownloadFileParts( file, x * MaxParts, MaxParts, priority, cryptKey );
ms.Write( filePart, 0, filePart.Length );
}
return ms.ToArray();
}
byte[] DownloadFileParts( Steam2Manifest.Node file, uint filePart, uint numParts, DownloadPriority priority = DownloadPriority.Low, byte[] cryptKey = null )
{
this.SendCommand(
7, // download file
this.StorageID,
this.MessageID,
file.FileID,
filePart,
numParts,
( byte )priority
);
uint storId = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint msgId = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
byte hasFile = this.Socket.Reader.ReadByte();
uint numChunks = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint fileModeValue = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
FileMode fileMode = ( FileMode )fileModeValue;
MemoryStream ms = new MemoryStream();
for ( int x = 0 ; x < numChunks ; ++x )
{
uint storId2 = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint msgId2 = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint chunkLen = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint storId3 = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint msgId3 = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
uint chunkLen2 = NetHelpers.EndianSwap( this.Socket.Reader.ReadUInt32() );
if ( chunkLen == 0 )
continue;
byte[] chunk = null;
int len = 0;
if ( fileMode == FileMode.Compressed )
{
chunk = this.Socket.Reader.ReadBytes( ( int )chunkLen );
len = DecompressFileChunk( ref chunk, ( int )file.Parent.BlockSize );
}
else if ( fileMode == FileMode.Encrypted )
{
len = DecryptFileChunk( out chunk, ( int )chunkLen, cryptKey );
}
else if ( fileMode == FileMode.EncryptedAndCompressed )
{
// Account for 2 integers before the encrypted data
chunkLen -= 8;
// Skip first integer (length of the encrypted data)
this.Socket.Reader.ReadInt32();
// Length of decrypted and decompressed data
int plainLen = this.Socket.Reader.ReadInt32();
DecryptFileChunk( out chunk, ( int )chunkLen, cryptKey );
len = DecompressFileChunk( ref chunk, plainLen );
}
else if ( fileMode == FileMode.None )
{
chunk = this.Socket.Reader.ReadBytes( ( int )chunkLen );
len = chunk.Length;
}
ms.Write( chunk, 0, len );
}
byte[] data = ms.ToArray();
this.MessageID++;
return data;
}
/// <summary>
/// Downloads a specific file from the Steam servers.
/// </summary>
/// <param name="file">The file to download, given from the manifest.</param>
/// <param name="priority">The download priority.</param>
/// <param name="cryptKey">The AES encryption key used for any encrypted files.</param>
/// <returns>A byte array representing the file.</returns>
public byte[] DownloadFile( Steam2Manifest.Node file, DownloadPriority priority = DownloadPriority.Low, byte[] cryptKey = null )
{
using (var ms = new MemoryStream())
{
DownloadFileToStream( file, ms, priority, cryptKey );
return ms.ToArray();
}
}
