/// <summary>
/// 下载文件
/// </summary>
/// <param name="remotefile">远程文件</param>
/// <param name="localfile">本地文件</param>
/// <param name="mode">端点续传模式</param>
/// <returns></returns>
public Int64 DownloadFile(String remotefile, String localfile, FtpTransportMode mode)
{
#region 准备工作
if (String.IsNullOrEmpty(remotefile))
{
return(0);
}
if (String.IsNullOrEmpty(localfile))
{
var str = remotefile;
if (str.Contains("/"))
{
str = str.Substring(str.LastIndexOf("/") + 1);
}
localfile = str;
}
if (localfile[1] != Path.VolumeSeparatorChar)
{
localfile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, localfile);
}
if (File.Exists(localfile))
{
if (mode == FtpTransportMode.OverWrite)
{
File.Delete(localfile);
}
else if (mode == FtpTransportMode.None)
{
return(0);
}
//throw new Exception("目标文件已存在！");
}
#endregion
var e = new LoadFileEventArgs();
if (OnDownloadFile != null)
{
e.Cancel = false;
e.Src = remotefile;
e.Des = localfile;
var fi = new FileInfo(localfile);
if (fi != null && fi.Exists)
{
e.DesSize = fi.Length;
}
OnDownloadFile(this, e);
if (e.Cancel)
{
return(0);
}
}
try
{
#region 载
var ftp = GetFtpRequest(remotefile);
ftp.Method = WebRequestMethods.Ftp.DownloadFile;
ftp.UseBinary = true;
if (!Directory.Exists(Path.GetDirectoryName(localfile)))
{
Directory.CreateDirectory(Path.GetDirectoryName(localfile));
}
var fs = new FileStream(localfile, FileMode.OpenOrCreate, FileAccess.Write);
//如果采用断点续传，则从断点处开始
if (mode == FtpTransportMode.Append)
{
//取远程文件大小
var size = GetFileSize(remotefile);
if (fs.Length >= size)
{
return(0);
}
//设置断点
ftp.ContentOffset = fs.Length;
}
var buffer = new Byte[2048];
Int64 count = 0;
using (var response = GetResponse(ftp))
{
using (var responseStream = response.GetResponseStream())
{
try
{
var read = 0;
do
{
read = responseStream.Read(buffer, 0, buffer.Length);
count += read;
fs.Write(buffer, 0, read);
} while (read != 0);
}
finally
{
fs.Close();
responseStream.Close();
}
}
response.Close();
}
e.SrcSize = count;
return(count);
#endregion
}
finally
{
if (OnDownloadFileFinished != null)
{
var fi = new FileInfo(localfile);
if (fi != null && fi.Exists)
{
e.DesSize = fi.Length;
}
OnDownloadFileFinished(this, e);
}
}
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="localfile">本地文件</param>
/// <param name="remotefile">远程文件</param>
/// <param name="mode">模式</param>
/// <returns></returns>
public Int64 UploadFile(String localfile, String remotefile, FtpTransportMode mode)
{
#region 准备工作
if (String.IsNullOrEmpty(localfile))
{
throw new ArgumentNullException("localfile", "没有指定本地文件名。");
}
if (String.IsNullOrEmpty(remotefile))
{
throw new ArgumentNullException("remotefile", "没有指定远程文件名。");
}
if (localfile[1] != Path.VolumeSeparatorChar)
{
localfile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, localfile);
}
var fi = new FileInfo(localfile);
if (!fi.Exists)
{
throw new Exception("本地文件不存在。");
}
//if (String.IsNullOrEmpty(remotefile)) remotefile = fi.Name;
var e = new LoadFileEventArgs();
if (OnUploadFile != null)
{
e.Cancel = false;
e.Src = localfile;
e.SrcSize = fi.Length;
e.Des = remotefile;
OnUploadFile(this, e);
if (e.Cancel)
{
return(0);
}
}
#endregion
try
{
#region
var ftp = GetFtpRequest(remotefile);
ftp.Method = WebRequestMethods.Ftp.UploadFile;
ftp.UseBinary = true;
var buffer = new Byte[2048];
Int64 size = 0;
using (var fs = fi.OpenRead())
{
try
{
//如果采用断点续传，则从断点处开始
if (mode == FtpTransportMode.Append)
{
//取远程文件大小
var size2 = GetFileSize(remotefile);
if (fs.Length <= size2)
{
return(size2);
}
//设置断点
ftp.ContentOffset = size2;
fs.Position = size2;
}
using (var rs = ftp.GetRequestStream())
{
Int32 dataRead;
do
{
dataRead = fs.Read(buffer, 0, buffer.Length);
size += dataRead;
rs.Write(buffer, 0, dataRead);
} while (dataRead >= buffer.Length);
rs.Close();
}
}
finally
{
fs.Close();
}
}
e.DesSize = size;
return(size);
#endregion
}
finally
{
OnUploadFileFinished?.Invoke(this, e);
}
}
