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);
}
/// <remarks>This code does sending specifically for the <paramref name="controlComplexSocket" /> and does some logging</remarks>
private async Task <bool> SendAndLogAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken,
string command,
params object[] args)
{
command = string.Format(command,
args);
if (!command.EndsWith(Environment.NewLine))
{
command = string.Concat(command,
Environment.NewLine);
}
{
var socketRequestEventArg = new SocketRequestEventArg(command);
this.OnSocketRequestAsync(socketRequestEventArg);
}
{
var buffer = this.Encoding.GetBytes(command);
using (var memoryStream = new MemoryStream(buffer))
{
var success = await controlComplexSocket.Socket.SendAsync(this.ChunkSendBufferSize,
controlComplexSocket.GetSocketAsyncEventArgs,
memoryStream,
cancellationToken);
return(success);
}
}
}
internal SocketAsyncEventArgsUserToken(ComplexSocket complexSocket,
TimeSpan timeout)
{
Contract.Requires(complexSocket != null);
this._complexSocket = complexSocket;
this._timeout = timeout;
}
private async Task <bool> ChangeWorkingDirectoryAsync(ComplexSocket controlComplexSocket,
string directory,
CancellationToken cancellationToken,
bool createDirectoryIfNotExists = false)
{
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"CWD {0}",
directory);
if (!success)
{
return(false);
}
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
switch (ftpReply.FtpResponseType)
{
case FtpResponseType.PermanentNegativeCompletion:
// TODO some parsing of the actual FtpReply.ResponseCode should be done in here. i assume 5xx-state means "directory does not exist" all the time, which might be wrong
if (!createDirectoryIfNotExists)
{
return(false);
}
success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"MKD {0}",
directory);
if (!success)
{
return(false);
}
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
return(false);
}
goto case FtpResponseType.PositiveCompletion;
case FtpResponseType.PositiveCompletion:
this._currentFtpDirectory = FtpDirectory.Create(this._currentFtpDirectory,
directory);
break;
default:
return(false);
}
return(true);
}
public static ComplexSocket CreateForTransfer(FtpClient ftpClient,
IPEndPoint ipEndPoint)
{
// TODO this method should be moved to a factory
// TODO add check for ftpClient.Port 0 - 0xffff
var complexSocket = new ComplexSocket(ipEndPoint,
false,
ftpClient.SocketReceiveBufferSize,
ftpClient.SocketSendBufferSize,
ftpClient.SocketClientAccessPolicyProtocol);
return(complexSocket);
}
public static ComplexSocket CreateForControl(FtpClient ftpClient)
{
// TODO this method should be moved to a factory
// TODO add check for ftpClient.Port 0 - 0xffff
var endPoint = new DnsEndPoint(ftpClient.Server,
ftpClient.Port);
var complexSocket = new ComplexSocket(endPoint,
true,
ftpClient.SocketReceiveBufferSize,
ftpClient.SocketSendBufferSize,
ftpClient.SocketClientAccessPolicyProtocol);
return(complexSocket);
}
/// <remarks>This code does receiving specifically for the <paramref name="controlComplexSocket" /> and does some logging</remarks>
private async Task <FtpReply> ReceiveAndLogAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken)
{
this.WaitBeforeReceive();
var ftpReply = await controlComplexSocket.Socket.GetFtpReplyAsync(this.ChunkReceiveBufferSize,
controlComplexSocket.GetSocketAsyncEventArgs,
this.Encoding,
cancellationToken);
{
var socketResponseEventArg = new SocketResponseEventArg(ftpReply.Data);
this.OnSocketResponseAsync(socketResponseEventArg);
}
return(ftpReply);
}
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 bool EnsureConnection()
{
var controlComplexSocket = this._controlComplexSocket ?? this.CreateControlComplexSocket();
if (controlComplexSocket.Connected)
{
return(true);
}
{
var success = controlComplexSocket.Connect(this.ConnectTimeout);
if (!success)
{
return(false);
}
}
{
var complexResult = controlComplexSocket.Receive(this.Encoding,
this.ReceiveTimeout);
var success = complexResult.Success;
if (!success)
{
return(false);
}
}
{
var success = controlComplexSocket.Authenticate(this.Username,
this.Password,
this.Encoding,
this.SendTimeout,
this.ReceiveTimeout);
if (!success)
{
return(false);
}
}
this._controlComplexSocket = controlComplexSocket;
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 static ComplexSocket CreateForControl(FtpClient ftpClient)
{
// TODO this method should be moved to a factory
// TODO add check for ftpClient.Port 0 - 0xffff
var endPoint = new DnsEndPoint(ftpClient.Server,
ftpClient.Port);
var complexSocket = new ComplexSocket(endPoint,
true,
ftpClient.SocketReceiveBufferSize,
ftpClient.SocketSendBufferSize,
ftpClient.SocketClientAccessPolicyProtocol);
return complexSocket;
}
public static ComplexSocket CreateForTransfer(FtpClient ftpClient,
IPEndPoint ipEndPoint)
{
// TODO this method should be moved to a factory
// TODO add check for ftpClient.Port 0 - 0xffff
var complexSocket = new ComplexSocket(ipEndPoint,
false,
ftpClient.SocketReceiveBufferSize,
ftpClient.SocketSendBufferSize,
ftpClient.SocketClientAccessPolicyProtocol);
return complexSocket;
}
/// <remarks>This code does receiving specifically for the <paramref name="controlComplexSocket" /> and does some logging</remarks>
private async Task<FtpReply> ReceiveAndLogAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken)
{
this.WaitBeforeReceive();
var ftpReply = await controlComplexSocket.Socket.GetFtpReplyAsync(this.ChunkReceiveBufferSize,
controlComplexSocket.GetSocketAsyncEventArgs,
this.Encoding,
cancellationToken);
{
var socketResponseEventArg = new SocketResponseEventArg(ftpReply.Data);
this.OnSocketResponseAsync(socketResponseEventArg);
}
return ftpReply;
}
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<ComplexSocket> EnsureConnectionAndAuthenticationAsync(CancellationToken cancellationToken)
{
var controlComplexSocket = this._controlComplexSocket ?? ComplexSocket.CreateForControl(this);
if (!controlComplexSocket.Connected)
{
this._authenticated = false;
var success = await controlComplexSocket.ConnectAsync(cancellationToken);
if (!success)
{
controlComplexSocket = null;
}
else
{
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
controlComplexSocket = null;
}
}
}
if (controlComplexSocket != null)
{
if (this._authenticated)
{
return controlComplexSocket;
}
FtpReply ftpReply;
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"USER {0}",
this.Username);
if (success)
{
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (ftpReply.FtpResponseType == FtpResponseType.PositiveIntermediate)
{
success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"PASS {0}",
this.Password);
if (success)
{
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
}
else
{
ftpReply = FtpReply.Failed;
}
}
}
else
{
ftpReply = FtpReply.Failed;
}
this._authenticated = ftpReply.Success;
if (!this._authenticated)
{
controlComplexSocket = null;
}
}
this._controlComplexSocket = controlComplexSocket;
return controlComplexSocket;
}
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<bool> ChangeWorkingDirectoryAsync(ComplexSocket controlComplexSocket,
string directory,
CancellationToken cancellationToken,
bool createDirectoryIfNotExists = false)
{
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"CWD {0}",
directory);
if (!success)
{
return false;
}
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
switch (ftpReply.FtpResponseType)
{
case FtpResponseType.PermanentNegativeCompletion:
// TODO some parsing of the actual FtpReply.ResponseCode should be done in here. i assume 5xx-state means "directory does not exist" all the time, which might be wrong
if (!createDirectoryIfNotExists)
{
return false;
}
success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"MKD {0}",
directory);
if (!success)
{
return false;
}
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
return false;
}
goto case FtpResponseType.PositiveCompletion;
case FtpResponseType.PositiveCompletion:
this._currentFtpDirectory = FtpDirectory.Create(this._currentFtpDirectory,
directory);
break;
default:
return false;
}
return true;
}
private async Task <ComplexSocket> EnsureConnectionAndAuthenticationAsync(CancellationToken cancellationToken)
{
var controlComplexSocket = this._controlComplexSocket ?? ComplexSocket.CreateForControl(this);
if (!controlComplexSocket.Connected)
{
this._authenticated = false;
var success = await controlComplexSocket.ConnectAsync(cancellationToken);
if (!success)
{
controlComplexSocket = null;
}
else
{
var ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (!ftpReply.Success)
{
controlComplexSocket = null;
}
}
}
if (controlComplexSocket != null)
{
if (this._authenticated)
{
return(controlComplexSocket);
}
FtpReply ftpReply;
var success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"USER {0}",
this.Username);
if (success)
{
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
if (ftpReply.FtpResponseType == FtpResponseType.PositiveIntermediate)
{
success = await this.SendAndLogAsync(controlComplexSocket,
cancellationToken,
"PASS {0}",
this.Password);
if (success)
{
ftpReply = await this.ReceiveAndLogAsync(controlComplexSocket,
cancellationToken);
}
else
{
ftpReply = FtpReply.Failed;
}
}
}
else
{
ftpReply = FtpReply.Failed;
}
this._authenticated = ftpReply.Success;
if (!this._authenticated)
{
controlComplexSocket = null;
}
}
this._controlComplexSocket = controlComplexSocket;
return(controlComplexSocket);
}
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;
}
/// <remarks>This code does sending specifically for the <paramref name="controlComplexSocket" /> and does some logging</remarks>
private async Task<bool> SendAndLogAsync(ComplexSocket controlComplexSocket,
CancellationToken cancellationToken,
string command,
params object[] args)
{
command = string.Format(command,
args);
if (!command.EndsWith(Environment.NewLine))
{
command = string.Concat(command,
Environment.NewLine);
}
{
var socketRequestEventArg = new SocketRequestEventArg(command);
this.OnSocketRequestAsync(socketRequestEventArg);
}
{
var buffer = this.Encoding.GetBytes(command);
using (var memoryStream = new MemoryStream(buffer))
{
var success = await controlComplexSocket.Socket.SendAsync(this.ChunkSendBufferSize,
controlComplexSocket.GetSocketAsyncEventArgs,
memoryStream,
cancellationToken);
return success;
}
}
}
