private void CloseConnection(FTPConnection ftpConnection)
{
if (ftpConnection.IsConnected)
{
ftpConnection.Close();
}
}
public Task UploadFile(FileUploadingInfo fileUploadingInfo, CancellationToken token, FTPTaskErrorHandler ftpTaskErrorHandler = null)
{
return(Task.Run(() =>
{
lock (fileUploadingInfo)
{
if (fileUploadingInfo.IsFinished)
{
return;
}
FTPConnection ftpConnection = null;
try
{
ftpConnection = CreateConnection(fileUploadingInfo.serverInfo);
Utils.WriteDebugInfo(ftpConnection.connectionName, "用于上传文件的连接已建立。\r\nFileUploadingInfo: " + fileUploadingInfo.ToString());
ftpConnection.UploadFile(fileUploadingInfo, token);
ftpConnection.Close();
fileUploadingInfo.Close();
fileUploadingInfo.IsFinished = true;
Utils.WriteDebugInfo(ftpConnection.connectionName, "操作已完成，连接主动断开。");
}
catch (OperationCanceledException)
{
ftpConnection?.Close();
if (ftpConnection != null)
{
Utils.WriteDebugInfo(ftpConnection.connectionName, "操作被用户取消，连接已断开。");
}
}
catch (FTPResponseException ex)
{
ftpTaskErrorHandler?.Invoke(ex, fileUploadingInfo.Tag);
ftpConnection?.Close();
if (ftpConnection != null)
{
Utils.WriteDebugInfo(ftpConnection.connectionName, "由于发生了不可恢复的异常，连接已断开。" + " FTPResponseException: " + ex.Message);
}
}
}
}));
}
public Task <bool> DeleteDirWithFiles(string name)
{
return(Task.Run(() =>
{
try
{
FTPConnection ftpConnection = CreateConnection(Server);
var result = DeleteDir(name, ftpConnection);
ftpConnection.Close();
return result;
}
catch (FTPResponseException ex)
{
FTPErrorNotifications?.Invoke(ex);
}
return false;
}));
}
public Task <bool> CreatePersistentConnection()
{
return(Task.Run(() =>
{
try
{
lock (persistentConnectionLock)
{
persistentConnection?.Close();
persistentConnection = CreateConnection(Server, true);
CurrentRemotePath = persistentConnection.GetCurrentWorkingDirectory();
}
timerKeepAlive = new Timer((state) =>
{
try
{
lock (persistentConnectionLock)
{
persistentConnection.SendNullCommand();
}
}
catch (FTPResponseException ex)
{
timerKeepAlive.Dispose();
timerKeepAlive = null;
FTPErrorNotifications?.Invoke(ex);
}
}, null, 15000, 15000);
return true;
}
catch (FTPResponseException ex)
{
FTPErrorNotifications?.Invoke(ex);
}
return false;
}));
}
public Task <List <RemoteFile> > GetFileList()
{
return(Task.Run(() =>
{
FTPConnection ftpConnection = null;
try
{
ftpConnection = CreateConnection(Server);
Utils.WriteDebugInfo(ftpConnection.connectionName, "用于获取文件列表的连接已建立。");
ftpConnection.ChangeCurrentWorkingDirectory(CurrentRemotePath);
FTPInfoNotifier?.Invoke("获取文件列表...");
string result = ftpConnection.GetFileList(true);
var list = ParseFileListWithFileInfo(result);
if (list == null)
{
// fallback to NLST
result = ftpConnection.GetFileList(false);
list = ParseFileList(ftpConnection, result);
}
FTPInfoNotifier?.Invoke("FTP 服务就绪，文件列表刷新于 " + DateTime.Now + "，共" + list.Count + "项");
ftpConnection.Close();
Utils.WriteDebugInfo(ftpConnection.connectionName, "操作已成功完成，连接主动断开。");
return list;
}
catch (FTPResponseException ex)
{
FTPErrorNotifications?.Invoke(ex);
ftpConnection?.Close();
if (ftpConnection != null)
{
Utils.WriteDebugInfo(ftpConnection.connectionName, "由于发生了不可恢复的异常，连接已断开。" + " FTPResponseException: " + ex.Message);
}
}
return null;
}));
}