/// <summary>
/// 下载文件
/// </summary>
/// <param name="ftpInfomation">FTP基本信息模型</param>
/// <param name="fileName">FTP文件名</param>
/// <param name="filePath">本地文件路径</param>
/// <param name="overwrite">是否覆盖文件</param>
/// <param name="errMsg">[OUT]错误信息</param>
public static bool CF_DownloadFile(ModFtpInfomation ftpInfomation, string fileName, string filePath, bool overwrite, out string errMsg)
{
bool result = false;
ftpInfomation.FtpReqInfo.CF_PushRequestPath();
try
{
//判断FTP文件是否存在
EExistence isExistFile = CF_IsExistFile(ftpInfomation, fileName, out errMsg);
if (isExistFile == EExistence.NotExist)
{
errMsg = "FTP文件不存在！";
result = false;
}
else if (isExistFile == EExistence.Exist)
{
FileInfo file = new FileInfo(filePath);
//创建本地文件夹
if (!file.Directory.Exists)
{
file.Directory.Create();
}
bool isExist = file.Exists;
if (isExist)
{
//是否覆盖
if (!overwrite)
{
errMsg = "目标文件已存在！";
result = false;
}
else
{
isExist = false;
}
}
if (!isExist)
{
ftpInfomation.FtpReqInfo.Method = EFtpRequestMethod.DownloadFile;
ftpInfomation.FtpReqInfo.RequestPath = ftpInfomation.GetCombinePath(fileName);
FtpWebResponse ftpWebResponse = CF_GetFtpResponse(ftpInfomation, out errMsg);
if (ftpWebResponse != null)
{
using (Stream stream = ftpWebResponse.GetResponseStream())
{
using (FileStream fileStream = new FileStream(file.FullName, FileMode.Create, FileAccess.Write))
{
ModTransmissionSpeed transmissionSpeed = ftpInfomation.FtpReqInfo.TransmissionSpeed;
if (transmissionSpeed.EnableLimit)
{
//缓存字节数
int bufferSize = transmissionSpeed.Speed * (int)Math.Pow(2, transmissionSpeed.Unit.CF_ToNumber());
//缓存
byte[] btBuffer = new byte[bufferSize];
//读取的字节数
int readSize = stream.Read(btBuffer, 0, bufferSize);
while (readSize > 0)
{
//写入服务器
fileStream.Write(btBuffer, 0, readSize);
//延时
Thread.Sleep(transmissionSpeed.Delay);
readSize = stream.Read(btBuffer, 0, bufferSize);
}
}
else
{
stream.CopyTo(fileStream);
}
}
}
}
result = true;
}
}
}
catch (Exception ex)
{
errMsg = ex.Message;
result = false;
}
ftpInfomation.FtpReqInfo.CF_PopRequestPath();
return(result);
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="ftpInfomation">FTP基本信息模型（目标文件路径）</param>
/// <param name="fileName">FTP文件名</param>
/// <param name="filePath">本地文件路径</param>
/// <param name="overwrite">是否覆盖文件</param>
/// <param name="errMsg">[OUT]错误信息</param>
public static bool CF_UploadFile(ModFtpInfomation ftpInfomation, string fileName, string filePath, bool overwrite, out string errMsg)
{
bool result = false;
ftpInfomation.FtpReqInfo.CF_PushRequestPath();
try
{
//判断原始文件是否存在
FileInfo file = new FileInfo(filePath);
if (!file.Exists)
{
errMsg = "本地文件不存在！";
result = false;
}
else
{
EExistence isExistDir = CF_IsExistDirectory(ftpInfomation, out errMsg);
if (isExistDir == EExistence.Exist || string.IsNullOrEmpty(ftpInfomation.GetCurrentName()))
{
//判断目标文件是否存在
EExistence isExistFile = CF_IsExistFile(ftpInfomation, fileName, out errMsg);
if (isExistFile == EExistence.Exist)
{
//是否覆盖
if (!overwrite)
{
errMsg = "目标文件已存在！";
result = false;
}
else
{
isExistFile = EExistence.NotExist;
}
}
if (isExistFile == EExistence.NotExist)
{
ftpInfomation.FtpReqInfo.Method = EFtpRequestMethod.UploadFile;
ftpInfomation.FtpReqInfo.RequestPath = ftpInfomation.GetCombinePath(fileName);
FtpWebRequest ftpWebRequest = CF_GetFtpRequest(ftpInfomation, out errMsg);
if (ftpWebRequest != null)
{
using (Stream stream = ftpWebRequest.GetRequestStream())
{
using (FileStream fileStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read))
{
ModTransmissionSpeed transmissionSpeed = ftpInfomation.FtpReqInfo.TransmissionSpeed;
if (transmissionSpeed.EnableLimit)
{
//缓存字节数
int bufferSize = transmissionSpeed.Speed * (int)Math.Pow(2, transmissionSpeed.Unit.CF_ToNumber());
//缓存
byte[] btBuffer = new byte[bufferSize];
//读取的字节数
int readSize = fileStream.Read(btBuffer, 0, bufferSize);
while (readSize > 0)
{
//写入本地文件
stream.Write(btBuffer, 0, readSize);
//延时
Thread.Sleep(transmissionSpeed.Delay);
readSize = fileStream.Read(btBuffer, 0, bufferSize);
}
}
else
{
fileStream.CopyTo(stream);
}
}
}
}
result = true;
}
}
else
{
errMsg = "目标文件夹不存在！";
result = false;
}
}
}
catch (Exception ex)
{
errMsg = ex.Message;
result = false;
}
ftpInfomation.FtpReqInfo.CF_PopRequestPath();
return(result);
}
