public FTPConnection Connect()
{
FTPConnection ftpConnection = new FTPConnection();
try
{
ftpConnection.ServerAddress = serverName;
ftpConnection.ServerPort = serverPort;
ftpConnection.UserName = (userName == string.Empty) ? "anonymous" : userName;
ftpConnection.Password = (userName == string.Empty) ? "1" : userPassword;
ftpConnection.ConnectMode = (passivMode) ? FTPConnectMode.PASV : FTPConnectMode.ACTIVE;
ftpConnection.Connect();
return(ftpConnection);
}
catch (FTPException)
{
CloseConnection(ftpConnection);
throw;
}
catch (IOException)
{
CloseConnection(ftpConnection);
throw;
}
catch (SocketException)
{
CloseConnection(ftpConnection);
throw;
}
}
private long connectionCount = 0; // Note: 用于Connection命名，ConnectionName目前只用于日志
private FTPConnection CreateConnection(ServerInfo server, bool setNotifier = false, string connectionName = null)
{
if (connectionName == null)
{
connectionCount++; connectionName = connectionCount.ToString();
}
int retryCount = 0;
while (retryCount <= 3)
{
try
{
retryCount++;
FTPConnection ftpConnection = new FTPConnection(connectionName, server);
if (setNotifier)
{
ftpConnection.FTPInfoNotifier += FTPInfoNotifier;
}
ftpConnection.Connect();
return(ftpConnection);
}
catch (FTPResponseException ex)
{
if (!ex.Recoverable)
{
throw;
}
}
}
throw new FTPResponseException("客户端无法创建Socket，请检查端口号使用情况");
}