/// <summary>
/// 判斷指定的文件是否存在
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
public bool IsExists(FtpParameter p)
{
string name = ComFunc.FindFileName(p.FTP_URL);
string dir = p.FTP_URL;
if (name.Length > 0)
{
dir = dir.Replace(name, "");
}
StringStd l = ListDirectory(p);
StringStd[] ls = l.Split("\r\n");
List <StringStd> lists = new List <StringStd>();
foreach (StringStd s in ls)
{
lists.Add(s.ToUpper());
}
if (lists.Contains(name.ToUpper()))
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 從fpt上找到對應的存在文件的名稱，以便忽略大小寫，提供給download方法使用
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
protected string FindMappingFileName(FtpParameter p)
{
string name = ComFunc.FindFileName(p.FTP_URL);
string dir = p.FTP_URL;
if (name.Length > 0)
{
dir = dir.Replace(name, "");
}
string l = ListDirectory(p);
string[] ls = l.Split("\r\n");
Dictionary <string, string> lists = new Dictionary <string, string>();
foreach (StringStd s in ls)
{
lists.Add(s.ToUpper(), s);
}
return(lists[name.ToUpper()] == null ? "" : lists[name.ToUpper()]);
}
/// <summary>
/// 下载文件，返回数据流
/// </summary>
/// <param name="p"></param>
/// <param name="processsing"></param>
/// <param name="end"></param>
/// <param name="reserveObject"></param>
/// <returns></returns>
public MemoryStream DownLoadStream(FtpParameter p, Action <FTPStatusData> processsing, Action <FTPStatusData> end, object reserveObject)
{
try
{
string name = ComFunc.FindFileName(p.FTP_URL);
string dir = p.FTP_URL;
if (name.Length > 0)
{
dir = dir.Replace(name, "");
}
//忽略文件名稱大小寫的處理
//if (name.ToUpper() != name)
//{
// name = FindMappingFileName(p);
//}
InitByParameters(p);
ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
FtpWebResponse downloadResponse =
(FtpWebResponse)ftpRequest.GetResponse();
stream = downloadResponse.GetResponseStream();
string fileName =
Path.GetFileName(ftpRequest.RequestUri.AbsolutePath);
MemoryStream rtn = null;
if (fileName.Length == 0)
{
rtn = new MemoryStream();
}
else
{
//如果有指定文件名称
rtn = new MemoryStream();
byte[] buffer = new byte[p.BufferSize];
int bytesRead;
long transfer = 0;
double speed = 0;
var st = DateTime.Now;
var totalbyte = fileStream.Length;
while (true)
{
bytesRead = stream.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
break;
}
rtn.Write(buffer, 0, bytesRead);
transfer += bytesRead;
if (processsing != null)
{
var fsd = new FTPStatusData();
fsd.CurrentByteLength = bytesRead;
fsd.TransferedByteLength = transfer;
fsd.TotalByteLength = totalbyte;
fsd.FileName = Path.GetFileName(name);
fsd.CostTime = DateTime.Now - st;
var s = fsd.CostTime.TotalMilliseconds;
if (s != 0)
{
speed = (double)transfer / s * 1000;
}
fsd.Speed = speed;
fsd.CurrentStatus = FTPStatusData.FtpStaus.Processing;
fsd.ReserveObject = reserveObject;
processsing(fsd);
}
}
if (end != null)
{
var fsd = new FTPStatusData();
fsd.CurrentByteLength = bytesRead;
fsd.TransferedByteLength = transfer;
fsd.TotalByteLength = totalbyte;
fsd.FileName = Path.GetFileName(name);
fsd.CostTime = DateTime.Now - st;
var s = fsd.CostTime.TotalMilliseconds;
if (s != 0)
{
speed = (double)transfer / s * 1000;
}
fsd.Speed = speed;
fsd.CurrentStatus = FTPStatusData.FtpStaus.End;
fsd.ReserveObject = reserveObject;
end(fsd);
}
}
return(rtn);
}
finally
{
Release();
}
}
