public override async Task ExecuteRequest()
{
using (AsyncConnectionBase connection = new AsyncConnectionBase(Gateway.ServerHost, Gateway.ServerPort, 0, 0))
{
byte[] fileNameBytes = Encoding.UTF8.GetBytes(FileName);
DataBuffer buf = new DataBuffer();
buf.InsertInt16(20); // Length
buf.InsertInt16(0x0200); // Protocol version
buf.InsertDwordString("IX86");
buf.InsertDwordString(Product.ProductCode);
if (_ad)
{
buf.InsertInt32(_adId);
buf.InsertDwordString(_adExt);
}
else
{
buf.InsertInt64(0);
}
bool connected = await connection.ConnectAsync();
if (!connected)
throw new IOException("Battle.net refused the connection.");
await connection.SendAsync(new byte[] { 2 });
byte[] outgoingData = buf.UnderlyingStream.ToArray();
await connection.SendAsync(outgoingData);
byte[] incomingData = new byte[4];
incomingData = await connection.ReceiveAsync(incomingData, 0, 4);
if (incomingData == null)
throw new IOException("Battle.net rejected the request.");
int serverToken = BitConverter.ToInt32(incomingData, 0);
buf = new DataBuffer();
buf.InsertInt32(0); // No resuming
if (FileTime.HasValue)
buf.InsertInt64(FileTime.Value.ToFileTimeUtc());
else
buf.InsertInt64(0);
int clientToken = new Random().Next();
buf.InsertInt32(clientToken);
buf.InsertInt32(_key.Key.Length);
buf.InsertInt32(_key.Product);
buf.InsertInt32(_key.Value1);
buf.InsertInt32(0);
buf.InsertByteArray(_key.GetHash(clientToken, serverToken));
buf.InsertByteArray(fileNameBytes);
buf.InsertByte(0);
outgoingData = buf.UnderlyingStream.ToArray();
await connection.SendAsync(outgoingData);
incomingData = new byte[8];
incomingData = await connection.ReceiveAsync(incomingData, 0, 8);
if (incomingData == null)
throw new IOException("Battle.net rejected the file request.");
int remainingHeaderSize = BitConverter.ToInt32(incomingData, 0) - 8;
int fileSize = BitConverter.ToInt32(incomingData, 4);
this.FileSize = fileSize;
incomingData = new byte[remainingHeaderSize];
incomingData = await connection.ReceiveAsync(incomingData, 0, remainingHeaderSize);
if (incomingData == null)
throw new IOException("Battle.net did not send a complete file header.");
DataReader reader = new DataReader(incomingData);
reader.Seek(8); // banner id / extension
long fileTime = reader.ReadInt64();
string name = reader.ReadCString();
if (string.Compare(name, FileName, StringComparison.OrdinalIgnoreCase) != 0 || FileSize == 0)
{
throw new FileNotFoundException("The specified file was not found by Battle.net.");
}
incomingData = new byte[fileSize];
incomingData = await connection.ReceiveAsync(incomingData, 0, fileSize);
if (incomingData == null)
throw new IOException("Battle.net did not send the file data.");
File.WriteAllBytes(LocalFileName, incomingData);
DateTime time = DateTime.FromFileTimeUtc(fileTime);
File.SetLastWriteTimeUtc(LocalFileName, time);
}
}
/// <summary>
/// Executes the BnFTP request, downloading the file to where <see cref="BnFtpRequestBase.LocalFileName">LocalFileName</see>
/// specifies, and closes the connection.
/// </summary>
/// <remarks>
/// <para>By default, <c>LocalFileName</c> is the same name as the remote file, which will cause the file
/// to be saved in the local application path. The desired location of the file must be set before
/// <b>ExecuteRequest</b> is called.</para>
/// </remarks>
/// <exception cref="IOException">Thrown if the local file cannot be written.</exception>
/// <exception cref="SocketException">Thrown if the remote host closes the connection prematurely.</exception>
public override async Task ExecuteRequest()
{
using (AsyncConnectionBase connection = new AsyncConnectionBase(Gateway.ServerHost, Gateway.ServerPort, 0, 0))
{
byte[] fileNameBytes = Encoding.UTF8.GetBytes(FileName);
DataBuffer buffer = new DataBuffer();
buffer.InsertInt16((short)(33 + fileNameBytes.Length));
buffer.InsertInt16(0x0100);
buffer.InsertDwordString("IX86");
buffer.InsertDwordString(Product.ProductCode);
if (_ad)
{
buffer.InsertInt32(_adId);
buffer.InsertDwordString(_adExt);
}
else
{
buffer.InsertInt64(0);
}
// currently resuming is not supported
buffer.InsertInt32(0);
if (FileTime.HasValue)
{
buffer.InsertInt64(FileTime.Value.ToFileTimeUtc());
}
else
{
buffer.InsertInt64(0);
}
buffer.InsertByteArray(fileNameBytes);
buffer.InsertByte(0);
bool connected = await connection.ConnectAsync();
if (!connected)
throw new IOException("Battle.net refused the connection to FTP.");
await connection.SendAsync(new byte[] { 2 });
byte[] byteData = buffer.UnderlyingStream.ToArray();
await connection.SendAsync(byteData);
byte[] header = new byte[8];
header = await connection.ReceiveAsync(header, 0, 8);
if (header == null)
throw new IOException("Battle.net did not respond to the FTP request.");
DataReader headerReader = new DataReader(header);
ushort headerLength = headerReader.ReadUInt16();
headerReader.Seek(2);
int fileSize = headerReader.ReadInt32();
this.FileSize = fileSize;
byte[] remainingHeader = new byte[headerLength - 8];
remainingHeader = await connection.ReceiveAsync(remainingHeader, 0, headerLength - 8);
if (remainingHeader == null)
throw new IOException("Battle.net did not send the complete header.");
headerReader = new DataReader(remainingHeader);
headerReader.Seek(8);
long fileTime = headerReader.ReadInt64();
string name = headerReader.ReadCString();
if (string.Compare(name, FileName, StringComparison.OrdinalIgnoreCase) != 0 || FileSize == 0)
{
throw new FileNotFoundException("The specified file was not found by Battle.net.");
}
Debug.WriteLine(fileSize, "File Size");
byte[] fileData = new byte[fileSize];
fileData = await connection.ReceiveAsync(fileData, 0, fileSize);
if (fileData == null)
throw new IOException("Battle.net did not send the file data.");
File.WriteAllBytes(LocalFileName, fileData);
DateTime time = DateTime.FromFileTimeUtc(fileTime);
File.SetLastWriteTimeUtc(LocalFileName, time);
}
}