/// <summary>
/// 下载FTP文件
/// </summary>
/// <param name="part"></param>
void DownloadFTPFile(string key, FTPItem part, double filesize)
{
try
{
//下载文件的URI
Uri u = new Uri(part.ServerFilePath);
//设定下载文件的保存路径
string downFile = part.LocFilePath;
//FtpWebRequest的作成
System.Net.FtpWebRequest ftpReq = (System.Net.FtpWebRequest)System.Net.WebRequest.Create(u);
//设定用户名和密码
ftpReq.Credentials = new System.Net.NetworkCredential(FTPUser, FTPPassword);
//MethodにWebRequestMethods.Ftp.DownloadFile("RETR")设定
ftpReq.Method = System.Net.WebRequestMethods.Ftp.DownloadFile;
//要求终了后关闭连接
ftpReq.KeepAlive = false;
//使用ASCII方式传送
ftpReq.UseBinary = false;
//设定PASSIVE方式无效
ftpReq.UsePassive = false;
//判断是否继续下载
//继续写入下载文件的FileStream
System.IO.FileStream fs;
if (part.IsContinue)
{
if (System.IO.File.Exists(downFile))
{
//继续下载
ftpReq.ContentOffset = (new System.IO.FileInfo(downFile)).Length;
fs = new System.IO.FileStream(downFile, System.IO.FileMode.Append, System.IO.FileAccess.Write);
}
else
{
//一般下载
fs = new System.IO.FileStream(downFile, System.IO.FileMode.Create, System.IO.FileAccess.Write);
}
}
else
{
if (System.IO.File.Exists(downFile))
{
File.Delete(downFile);
}
//一般下载
fs = new System.IO.FileStream(downFile, System.IO.FileMode.Create, System.IO.FileAccess.Write);
}
//取得FtpWebResponse
System.Net.FtpWebResponse ftpRes = (System.Net.FtpWebResponse)ftpReq.GetResponse();
//为了下载文件取得Stream
System.IO.Stream resStrm = ftpRes.GetResponseStream();
//写入下载的数据
byte[] buffer = new byte[20480];
double posLen = 0;
while (part.CloseState == false && part.RunState == FTPRunState.Run)
{
int readSize = resStrm.Read(buffer, 0, buffer.Length);
posLen += readSize;
if (readSize == 0)
{
break;
}
fs.Write(buffer, 0, readSize);
if (OnProgressChanged != null)
{
//System.Threading.Tasks.Task.Factory.StartNew(() =>
//{
OnProgressChanged(key, Math.Round((posLen / filesize) * 100, 2));
//});
}
}
fs.Close();
resStrm.Close();
if (part.RunState == FTPRunState.Run)
{
UploadFileList.TryRemove(key, out part);
if (OnProgressChanged != null)
{
OnProgressChanged(key, 100.00);
}
if (OnCompleted != null)
{
OnCompleted(key, part.ServerFilePath);
}
}
//表示从FTP服务器被送信的状态
//Console.WriteLine("{0}: {1}", ftpRes.StatusCode, ftpRes.StatusDescription);
//关闭连接
ftpRes.Close();
}
catch (Exception ex)
{
part.RunState = FTPRunState.Error;
UploadFileList.TryRemove(key, out part);//出错则删除
OnFailed(key, 150);
}
}
/// <summary>
/// 上传FTP文件
/// </summary>
/// <param name="part"></param>
void UploadFTPFile(string key, FTPItem part)
{
//bool success = true;
FileInfo fileInf = new FileInfo(part.LocFilePath);
long allbye = (long)fileInf.Length;
long startfilesize = 0;
if (part.IsContinue)
{
startfilesize = GetFtpFileSize(part.ServerFilePath, FTPUser, FTPPassword);// GetFileSize(newFileName, ftpServerIP, ftpUserID, ftpPassword, path);
}
if (startfilesize >= allbye)
{
return;
}
long startbye = startfilesize;
string uri = part.ServerFilePath;
FtpWebRequest reqFTP;
// 根据uri创建FtpWebRequest对象
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp用户名和密码
reqFTP.Credentials = new NetworkCredential(FTPUser, FTPPassword);
// 默认为true，连接不会被关闭
// 在一个命令之后被执行
reqFTP.KeepAlive = false;
// 指定执行什么命令
if (part.IsContinue)
{
reqFTP.Method = WebRequestMethods.Ftp.AppendFile;
}
else
{
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
}
// 指定数据传输类型
reqFTP.UseBinary = true;
// 上传文件时通知服务器文件的大小
reqFTP.ContentLength = fileInf.Length;
int buffLength = 20480;// 缓冲大小设置为20kb
byte[] buff = new byte[buffLength];
// 打开一个文件流 (System.IO.FileStream) 去读上传的文件
FileStream fs = fileInf.OpenRead();
try
{
// 把上传的文件写入流
Stream strm = reqFTP.GetRequestStream();
// 每次读文件流的20kb
fs.Seek(startfilesize, SeekOrigin.Begin);
int contentLen = fs.Read(buff, 0, buffLength);
// 流内容没有结束
while (contentLen != 0 && part.CloseState == false && part.RunState == FTPRunState.Run)
{
// 把内容从file stream 写入 upload stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
startbye += contentLen;
if (OnProgressChanged != null)
{
//System.Threading.Tasks.Task.Factory.StartNew(() =>
//{
OnProgressChanged(key, Math.Round(((double)startbye / (double)reqFTP.ContentLength) * 100, 2));
//});
}
}
// 关闭两个流
strm.Close();
fs.Close();
if (part.RunState == FTPRunState.Run)
{
UploadFileList.TryRemove(key, out part);
if (OnProgressChanged != null)
{
OnProgressChanged(key, 100);
}
if (OnCompleted != null)
{
OnCompleted(key, part.ServerFilePath);
}
}
}
catch (Exception ex)
{
part.RunState = FTPRunState.Error;
UploadFileList.TryRemove(key, out part);//出错则删除
OnFailed(key, 150);
}
}
