/* Download File */
public void Download(string localFile, string remoteFile)
{
try
{
/* Create an FTP Request */
FtpRequest = (FtpWebRequest)FtpWebRequest.Create(InterlocutorAddress + "/" + remoteFile);
/* Log in to the FTP Server with the User Name and Password Provided */
FtpRequest.Credentials = new NetworkCredential(UserName, Password);
LogInToInterlocutor(InterlocutorAddress);
/* When in doubt, use these options */
FtpRequest.UseBinary = true;
FtpRequest.UsePassive = true;
FtpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
FtpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
/* Establish Return Communication with the FTP Server */
FtpResponse = (FtpWebResponse)FtpRequest.GetResponse();
/* Get the FTP Server's Response Stream */
StartDownloadData(localFile, remoteFile, InterlocutorAddress);
FtpStream = FtpResponse.GetResponseStream();
/* Open a File Stream to Write the Downloaded File */
FileStream localFileStream = new FileStream(localFile, FileMode.Create);
/* Buffer for the Downloaded Data */
byte[] byteBuffer = new byte[BufferSize];
int bytesRead = FtpStream.Read(byteBuffer, 0, BufferSize);
/* Download the File by Writing the Buffered Data Until the Transfer is Complete */
try
{
while (bytesRead > 0)
{
localFileStream.Write(byteBuffer, 0, bytesRead);
bytesRead = FtpStream.Read(byteBuffer, 0, BufferSize);
}
}
finally
{ /* Resource Cleanup */
localFileStream.Close();
EndDownloadData(localFile, remoteFile, InterlocutorAddress);
}
}
finally
{
FtpStream.Close();
FtpResponse.Close();
FtpRequest = null;
}
}
/* Get the Size of a File */
public string GetFileSize(string fileName)
{
try
{
/* Create an FTP Request */
FtpRequest = (FtpWebRequest)FtpWebRequest.Create(InterlocutorAddress + "/" + fileName);
/* Log in to the FTP Server with the User Name and Password Provided */
FtpRequest.Credentials = new NetworkCredential(UserName, Password);
LogInToInterlocutor(InterlocutorAddress);
/* When in doubt, use these options */
FtpRequest.UseBinary = true;
FtpRequest.UsePassive = true;
FtpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
FtpRequest.Method = WebRequestMethods.Ftp.GetFileSize;
/* Establish Return Communication with the FTP Server */
FtpResponse = (FtpWebResponse)FtpRequest.GetResponse();
/* Establish Return Communication with the FTP Server */
FtpStream = FtpResponse.GetResponseStream();
/* Get the FTP Server's Response Stream */
StreamReader ftpReader = new StreamReader(FtpStream);
/* Store the Raw Response */
string fileInfo = null;
/* Read the Full Response Stream */
try { while (ftpReader.Peek() != -1)
{
fileInfo = ftpReader.ReadToEnd();
}
}
finally
{
/* Resource Cleanup */
ftpReader.Close();
}
/* Return File Size */
return(fileInfo);
}
finally
{
FtpStream.Close();
FtpResponse.Close();
FtpRequest = null;
}
}
/* List Directory Contents in Detail (Name, Size, Created, etc.) */
public string[] DirectoryListDetailed(string directory)
{
try
{
/* Create an FTP Request */
FtpRequest = (FtpWebRequest)FtpWebRequest.Create(InterlocutorAddress + "/" + directory);
/* Log in to the FTP Server with the User Name and Password Provided */
FtpRequest.Credentials = new NetworkCredential(UserName, Password);
LogInToInterlocutor(InterlocutorAddress);
/* When in doubt, use these options */
FtpRequest.UseBinary = true;
FtpRequest.UsePassive = true;
FtpRequest.KeepAlive = true;
/* Specify the Type of FTP Request */
FtpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
/* Establish Return Communication with the FTP Server */
FtpResponse = (FtpWebResponse)FtpRequest.GetResponse();
/* Establish Return Communication with the FTP Server */
FtpStream = FtpResponse.GetResponseStream();
/* Get the FTP Server's Response Stream */
StreamReader ftpReader = new StreamReader(FtpStream);
/* Store the Raw Response */
string directoryRaw = null;
/* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
try { while (ftpReader.Peek() != -1)
{
directoryRaw += ftpReader.ReadLine() + "|";
}
}
finally
{ /* Resource Cleanup */
ftpReader.Close();
}
/* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
return(directoryRaw.Split("|".ToCharArray()));
}
finally
{
FtpStream.Close();
FtpResponse.Close();
FtpRequest = null;
}
}
/// <summary> Descargar un fichero al servidor Ftp. </summary>
///
/// <param name="remoteFile"> Nombre del fichero remoto. </param>
/// <param name="localFile"> Nombre del fichero local. </param>
/// <param name="crearFichero"> Sobreescribir destino si ya existe. </param>
///
/// <returns> Resultado (S/N/C) </returns>
///
public Char FtpDownloadFile(string remoteFile, string localFile, int crearFichero = (int)FileMode.Create)
{
FileStream localFileStream;
byte[] byteBuffer;
int bytesLeidos;
Resultado = 'N';
try
{
if (String.IsNullOrEmpty(FTPHost) || string.IsNullOrEmpty(FTPUser) || FTPPwd == null)
{
UsrError = "KO - Faltan parámetros de conexión al Host Ftp";
UsrErrorC = -1;
Resultado = 'N';
return(Resultado);
}
// Conexión con el Host Ftp.
FtpRequest = (FtpWebRequest)FtpWebRequest.Create(FTPHost + "/" + remoteFile);
FtpRequest.Credentials = new NetworkCredential(FTPUser, FTPPwd);
FtpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
// Canal de comunicación con el Host Ftp.
FtpResponse = (FtpWebResponse)FtpRequest.GetResponse();
// Retorno de comunicación con el Host Ftp.
FtpFileStream = FtpResponse.GetResponseStream();
// Canal de comunicación con el fichero local.
localFileStream = new FileStream(localFile, FileMode.Create);
byteBuffer = new byte[_BYTE_BUFFER];
// Leer datos del fichero remoto y grabar en fichero local.
bytesLeidos = FtpFileStream.Read(byteBuffer, 0, _BYTE_BUFFER);
while (bytesLeidos > 0)
{
localFileStream.Write(byteBuffer, 0, _BYTE_BUFFER);
bytesLeidos = FtpFileStream.Read(byteBuffer, 0, _BYTE_BUFFER);
}
// Cerrar canales de comunicación Ftp.
localFileStream.Close();
FtpFileStream.Close();
FtpRequest = null;
FtpResponse.Close();
Resultado = 'S';
UsrError = "OK";
}
catch (Exception ex)
{
// Error de Ftp.
UsrErrorC = ex.HResult;
UsrError = ex.Message;
UsrErrorE = ex.StackTrace;
Resultado = 'C';
}
return(Resultado);
}
//------------------------------------------------------------------
// Métodos públicos de la clase.
//------------------------------------------------------------------
/// <summary>
///
/// </summary>
/// <param name="remoteFile"> Nombre del fichero remoto. </param>
///
/// <returns> Resultado (S/N/C) </returns>
///
public Char FtpFileExists(string remoteFile)
{
// string fileInfo; Innecesario.
Resultado = 'N';
try
{
if (String.IsNullOrEmpty(FTPHost) || string.IsNullOrEmpty(FTPUser) || FTPPwd == null)
{
UsrError = "KO - Faltan parámetros de conexión al Host Ftp";
UsrErrorC = -1;
Resultado = 'N';
return(Resultado);
}
FtpRequest = (FtpWebRequest)FtpWebRequest.Create(FTPHost + "/" + remoteFile);
FtpRequest.Credentials = new NetworkCredential(FTPUser, FTPPwd);
FtpRequest.Method = WebRequestMethods.Ftp.GetDateTimestamp;
// Canal de comunicación con el Host Ftp.
FtpResponse = (FtpWebResponse)FtpRequest.GetResponse();
// Retorno de comunicación con el Host Ftp.
FtpFileStream = FtpResponse.GetResponseStream();
// Canal de lectura del Host Ftp. - Innecesario.
// FtpStreamReader = new StreamReader(FtpFileStream);
// fileInfo = FtpStreamReader.ReadToEnd();
// Cerrar canales de comunicación Ftp.
FtpFileStream.Close();
FtpRequest = null;
FtpResponse.Close();
Resultado = 'S';
UsrError = "OK";
}
catch (WebException ex) when(ex.Status.ToString() == "ProtocolError")
{
// Error de Ftp.
UsrErrorC = ex.HResult;
UsrError = ex.Message;
UsrErrorE = ex.StackTrace;
Resultado = 'N';
}
catch (Exception ex)
{
// Error de programa.
UsrErrorC = ex.HResult;
UsrError = ex.Message;
UsrErrorE = ex.StackTrace;
Resultado = 'C';
}
return(Resultado);
}