private async Task <ComplexSocket> GetPassiveComplexSocketAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken)
{
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"PASV");
if (!success)
{
return(null);
}
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
return(null);
}
var ipEndPoint = FtpClientHelper.ParseIPEndPoint(ftpReply);
if (ipEndPoint == null)
{
return(null);
}
var transferComplexSocket = ComplexSocket.CreateForTransfer(this,
ipEndPoint);
return(transferComplexSocket);
}
private async Task <bool> GotoParentDirectoryAsync(ComplexSocket controlComplexSocket,
FtpFileSystemObject ftpFileSystemObject,
CancellationToken cancellationToken,
bool createDirectoryIfNotExists = false)
{
var ftpDirectory = ftpFileSystemObject.GetParentFtpDirectory();
var directoryChanges = FtpClientHelper.DirectoryChanges(this._currentFtpDirectory,
ftpDirectory);
foreach (var directoryChange in directoryChanges)
{
if (string.Equals(directoryChange,
FtpFileSystemObject.ParentChangeCommand))
{
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"CDUP");
if (success)
{
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (ftpReply.Success)
{
this._currentFtpDirectory = this._currentFtpDirectory.GetParentFtpDirectory();
}
}
}
else
{
var success = await this.ChangeWorkingDirectoryAsync(controlComplexSocket,
directoryChange,
cancellationToken,
createDirectoryIfNotExists);
if (!success)
{
return(false);
}
}
}
return(true);
}
private async Task <FtpFeatures> GetFtpFeaturesAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken)
{
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"FEAT");
if (!success)
{
return(FtpFeatures.Unknown);
}
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
return(FtpFeatures.Unknown);
}
var messages = ftpReply.Messages;
var ftpFeatures = FtpClientHelper.ParseFtpFeatures(messages);
return(ftpFeatures);
}
public FtpClient()
{
this.Encoding = Encoding.UTF8;
this.ConnectTimeout = TimeSpan.FromSeconds(30);
this.ReceiveTimeout = TimeSpan.FromSeconds(30);
this.SendTimeout = TimeSpan.FromMinutes(5);
this.SocketClientAccessPolicyProtocol = SocketClientAccessPolicyProtocol.Http;
this._ftpFeatures = new Lazy <FtpFeatures>(() =>
{
var controlComplexSocket = this._controlComplexSocket;
{
var success = controlComplexSocket.Send("FEAT",
this.Encoding,
this.SendTimeout);
if (!success)
{
return(FtpFeatures.Unknown);
}
}
{
var complexResult = controlComplexSocket.Receive(this.Encoding,
this.ReceiveTimeout);
var success = complexResult.Success;
if (!success)
{
return(FtpFeatures.Unknown);
}
var messages = complexResult.Messages;
var ftpFeatures = FtpClientHelper.ParseFtpFeatures(messages);
return(ftpFeatures);
}
});
}