public void CreateAndDeleteFile(IFileInfo fi)
{
IFileStream fs = fi.Create();
fs.Close();
fi.Delete();
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="fileStream">读取文件流</param>
/// <param name="remoteFileName">远程文件名</param>
/// <param name="onSelectedFileTransferMode">选择覆盖模式</param>
/// <returns></returns>
public async Task UploadFile(
IFileStream fileStream,
string remoteFileName,
Func <string, TransferMode> onSelectedFileTransferMode)
{
reset:
LogHelper.DebugWriteLog("begin upload");
var responsed = await this.AwaitOpenUploadFileStatus(remoteFileName); //获取远程文件状态
if (responsed.IsNull()) //返回null表示等待结果期间连接中断
{
var isReset = await this.AwaitResetUploadFile();
if (isReset)
{
goto reset;
}
else
{
fileStream.Close();
return;
}
}
long position = 0;
int fileMode = 0;//0覆盖，1续传,2跳过
if (responsed.Status == 1)
{
TransferMode transferMode = TransferMode.Continuingly;
if (!_transferMode.HasValue)
{
transferMode = onSelectedFileTransferMode.Invoke(remoteFileName);
}
else
{
transferMode = _transferMode.Value;
}
switch (transferMode)
{
case TransferMode.Replace:
fileMode = 0;
break;
case TransferMode.ReplaceAll:
fileMode = 0;
_transferMode = TransferMode.Replace;
break;
case TransferMode.Continuingly:
fileMode = 1;
position = responsed.Position;
break;
case TransferMode.ContinuinglyAll:
fileMode = 1;
position = responsed.Position;
_transferMode = TransferMode.Continuingly;
break;
case TransferMode.JumpOver:
CancelTransfer();
return;
case TransferMode.Cancel:
CancelTransfer();
_transferMode = transferMode;
return;
default:
break;
}
}
else if (responsed.Status == 2)//文件访问失败
{
fileStream.Close();
return;
}
fileStream.Position = position;
var fileSize = fileStream.Length;
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.Begin, remoteFileName, position, fileSize);
var data = await Task.Run(() => this.ReadFileStream(fileStream));
SendTo(CurrentSession, MessageHead.S_FILE_FRIST_DATA,//上传首数据块，带文件选项及长度
new FileFristUploadDataPack()
{
FileMode = fileMode,
Position = position,
FileSize = fileStream.Length,
Data = data
});
while (true)
{
if (TransferTaskFlage == TransferTaskFlage.Abort)
{
//停止
this.RemoteTaskStop();
fileStream.Close();
break;
}
if (fileStream.Position == fileStream.Length || fileMode == 2)
{
//传输完成，或者跳过
fileStream.Close();
break;
}
position += data.Length;
if (!await this.AwaitGetNextFileData())
{
var isReset = await this.AwaitResetUploadFile();
if (isReset)
{
goto reset;
}
else
{
fileStream.Close();
break;
}
}
data = await Task.Run(() => this.ReadFileStream(fileStream));
//底层通信库在正式发送数据包前会进行组包丶压缩等操作，由于文件数据块大，所处理耗时较长,此处使用线程以防止ui发生卡顿
await Task.Run(() => SendTo(CurrentSession, MessageHead.S_FILE_DATA,
new FileUploadDataPack()
{
FileSize = fileStream.Length,
Data = data
}));
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.Transfering, remoteFileName, position, fileSize);
}
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.End, remoteFileName, position, fileSize);
//取消传输
void CancelTransfer()
{
fileMode = 2;
fileStream.Close();
this.RemoteTaskStop();
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.End, remoteFileName, 0, 0);
}
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="fileStream">文件流</param>
/// <param name="remoteFileName">远程文件名</param>
/// <returns></returns>
public async Task DownloadFile(IFileStream fileStream, string remoteFileName)
{
//LogHelper.DebugWriteLog("begin download frist Data fileName:" + Path.GetFileName(localFileName));
long position = fileStream.Length;
reset:
var responsed = await this.AwaitOpenDownloadData(remoteFileName, position);//首数据包，带文件状态信息及文件分块
var status = 0;
//返回null表示已断开连接
if (responsed.IsNull())
{
var positionNull = await this.AwaitResetDownloadFile(fileStream);//等待重新连接
if (positionNull.HasValue)
{
position = positionNull.Value;
goto reset;
}
status = 0;
}
else if (responsed.Status == 1) //成功打开文件
{
await Task.Run(() => fileStream.Write(responsed.Data, 0, responsed.Data.Length));
status = 1;
}
else
{
status = responsed.Status;//文件访问失败
}
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.Begin, remoteFileName, position, responsed.FileSize);
while (status == 1)
{
if (TransferTaskFlage == TransferTaskFlage.Abort)
{
//停止传输
this.RemoteTaskStop();
break;
}
if (fileStream.Length >= responsed.FileSize)
{
break;//文件传输完成
}
var data = await this.AwaitDownloadDataPack().ConfigureAwait(true);
//LogHelper.DebugWriteLog("download data:" + (data == null ? "null" : data.Data.Length.ToString()));
if (this.WhetherClose)
{
break;//传输中途关闭应用
}
if (data.IsNull())
{
var positionNull = await this.AwaitResetDownloadFile(fileStream).ConfigureAwait(true);
if (!positionNull.HasValue)
{
break;//session断开期间应用被关闭
}
position = positionNull.Value;
goto reset;
}
await Task.Run(() => fileStream.Write(data.Data, 0, data.Data.Length));
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.Transfering, remoteFileName, fileStream.Length, responsed.FileSize);
}
this.OnFileTransferProgressEventHandler?.Invoke(this, FileTransferFlag.End, remoteFileName, fileStream.Length, responsed.FileSize);
fileStream.Close();
}