Question

C# 将FTP文件转移到另一个FTP服务器上如何实现

实时监测服务器上某文件夹是否有新上传的文件夹并将它转移到另外一个FTP服务器上去

Answer 1

C# ftp上传ftp
/// <summary>
/// 上传文件
/// </summary> /
// <param name="fileinfo">需要上传的文件</param>
/// <param name="targetDir">目标路径</param>
/// <param name="hostname">ftp地址</param> /
// <param name="username">ftp用户名</param> /
// <param name="password">ftp密码</param>
public static void UploadFile(FileInfo fileinfo, string targetDir, string hostname, string username, string password)
{ //1. check target
string target;
if (targetDir.Trim() == "")
{ return; }
target = Guid.NewGuid().ToString();
//使用临时文件名
string URI = "FTP://" + hostname + "/" + targetDir + "/" + target;
///WebClient webcl = new WebClient();
System.Net.FtpWebRequest ftp = GetRequest(URI, username, password);
//设置FTP命令 设置所要执行的FTP命令，
//ftp.Method = System.Net.WebRequestMethods.Ftp.ListDirectoryDetails;//假设此处为显示指定路径下的文件列表
ftp.Method = System.Net.WebRequestMethods.Ftp.UploadFile;
//指定文件传输的数据类型
ftp.UseBinary = true;
ftp.UsePassive = true; //告诉ftp文件大小
ftp.ContentLength = fileinfo.Length;
//缓冲大小设置为2KB
const int BufferSize = 2048;
byte[] content = new byte[BufferSize - 1 + 1];
int dataRead; //打开一个文件流 (System.IO.FileStream) 去读上传的文件
using (FileStream fs = fileinfo.OpenRead())
{
try { //把上传的文件写入流
using (Stream rs = ftp.GetRequestStream())
{ do
{ //每次读文件流的2KB
dataRead = fs.Read(content, 0, BufferSize); rs.Write(content, 0, dataRead); }
while (!(dataRead < BufferSize)); rs.Close(); } }
catch (Exception ex) { } finally { fs.Close(); } }
ftp = null; //设置FTP命令
ftp = GetRequest(URI, username, password);
ftp.Method = System.Net.WebRequestMethods.Ftp.Rename; //改名
ftp.RenameTo = fileinfo.Name; try { ftp.GetResponse(); }
catch (Exception ex)
{
ftp = GetRequest(URI, username, password); ftp.Method = System.Net.WebRequestMethods.Ftp.DeleteFile; //删除
ftp.GetResponse(); throw ex; } finally
{
//fileinfo.Delete(); } // 可以记录一个日志 "上传" + fileinfo.FullName + "上传到" + "FTP://" + hostname + "/" + targetDir + "/" + fileinfo.Name + "成功." );
ftp = null;
#region
/***** *FtpWebResponse * ****/ //FtpWebResponse ftpWebResponse = (FtpWebResponse)ftp.GetResponse();
#endregion
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="localDir">下载至本地路径</param>
/// <param name="FtpDir">ftp目标文件路径</param>
/// <param name="FtpFile">从ftp要下载的文件名</param>
/// <param name="hostname">ftp地址即IP</param>
/// <param name="username">ftp用户名</param>
/// <param name="password">ftp密码</param>
public static void DownloadFile(string localDir, string FtpDir, string FtpFile, string hostname, string username, string password)
{
string URI = "FTP://" + hostname + "/" + FtpDir + "/" + FtpFile;
string tmpname = Guid.NewGuid().ToString();
string localfile = localDir + @"\" + tmpname;

System.Net.FtpWebRequest ftp = GetRequest(URI, username, password);
ftp.Method = System.Net.WebRequestMethods.Ftp.DownloadFile;
ftp.UseBinary = true;
ftp.UsePassive = false;

using (FtpWebResponse response = (FtpWebResponse)ftp.GetResponse())
{
using (Stream responseStream = response.GetResponseStream())
{
//loop to read & write to file
using (FileStream fs = new FileStream(localfile, FileMode.CreateNew))
{
try
{
byte[] buffer = new byte[2048];
int read = 0;
do
{
read = responseStream.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, read);
} while (!(read == 0));
responseStream.Close();
fs.Flush();
fs.Close();
}
catch (Exception)
{
//catch error and delete file only partially downloaded
fs.Close();
//delete target file as it's incomplete
File.Delete(localfile);
throw;
}
}

responseStream.Close();
}

response.Close();
}

try
{
File.Delete(localDir + @"\" + FtpFile);
File.Move(localfile, localDir + @"\" + FtpFile);

ftp = null;
ftp = GetRequest(URI, username, password);
ftp.Method = System.Net.WebRequestMethods.Ftp.DeleteFile;
ftp.GetResponse();

}
catch (Exception ex)
{
File.Delete(localfile);
throw ex;
}

// 记录日志 "从" + URI.ToString() + "下载到" + localDir + @"\" + FtpFile + "成功." );
ftp = null;
}

/// <summary>
/// 搜索远程文件
/// </summary>
/// <param name="targetDir"></param>
/// <param name="hostname"></param>
/// <param name="username"></param>
/// <param name="password"></param>
/// <param name="SearchPattern"></param>
/// <returns></returns>
public static List<string> ListDirectory(string targetDir, string hostname, string username, string password, string SearchPattern)
{
List<string> result = new List<string>();
try
{
string URI = "FTP://" + hostname + "/" + targetDir + "/" + SearchPattern;

System.Net.FtpWebRequest ftp = GetRequest(URI, username, password);
ftp.Method = System.Net.WebRequestMethods.Ftp.ListDirectory;
ftp.UsePassive = true;
ftp.UseBinary = true;

string str = GetStringResponse(ftp);
str = str.Replace("\r\n", "\r").TrimEnd('\r');
str = str.Replace("\n", "\r");
if (str != string.Empty)
result.AddRange(str.Split('\r'));

return result;
}
catch { }
return null;
}

private static string GetStringResponse(FtpWebRequest ftp)
{
//Get the result, streaming to a string
string result = "";
using (FtpWebResponse response = (FtpWebResponse)ftp.GetResponse())
{
long size = response.ContentLength;
using (Stream datastream = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(datastream, System.Text.Encoding.Default))
{
result = sr.ReadToEnd();
sr.Close();
}

datastream.Close();
}

response.Close();
}

return result;
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

/// <summary>
/// 向Ftp服务器上传文件并创建和本地相同的目录结构
/// 遍历目录和子目录的文件
/// </summary>
/// <param name="file"></param>
private void GetFileSystemInfos(FileSystemInfo file)
{
string getDirecName=file.Name;
if (!ftpIsExistsFile(getDirecName, "192.168.0.172", "Anonymous", "") && file.Name.Equals(FileName))
{
MakeDir(getDirecName, "192.168.0.172", "Anonymous", "");
}
if (!file.Exists) return;
DirectoryInfo dire = file as DirectoryInfo;
if (dire == null) return;
FileSystemInfo[] files = dire.GetFileSystemInfos();

for (int i = 0; i < files.Length; i++)
{
FileInfo fi = files[i] as FileInfo;
if (fi != null)
{
DirectoryInfo DirecObj=fi.Directory;
string DireObjName = DirecObj.Name;
if (FileName.Equals(DireObjName))
{
UploadFile(fi, DireObjName, "192.168.0.172", "Anonymous", "");
}
else
{
Match m = Regex.Match(files[i].FullName, FileName + "+.*" + DireObjName);
//UploadFile(fi, FileName+"/"+DireObjName, "192.168.0.172", "Anonymous", "");
UploadFile(fi, m.ToString(), "192.168.0.172", "Anonymous", "");
}
}
else
{
string[] ArrayStr = files[i].FullName.Split('\\');
string finame=files[i].Name;
Match m=Regex.Match(files[i].FullName,FileName+"+.*"+finame);
//MakeDir(ArrayStr[ArrayStr.Length - 2].ToString() + "/" + finame, "192.168.0.172", "Anonymous", "");
MakeDir(m.ToString(), "192.168.0.172", "Anonymous", "");
GetFileSystemInfos(files[i]);
}
}
}

/// <summary>
/// 判断ftp服务器上该目录是否存在
/// </summary>
/// <param name="dirName"></param>
/// <param name="ftpHostIP"></param>
/// <param name="username"></param>
/// <param name="password"></param>
/// <returns></returns>
private bool ftpIsExistsFile(string dirName, string ftpHostIP, string username, string password)
{
bool flag = true;
try
{
string uri = "ftp://" + ftpHostIP + "/" + dirName;
System.Net.FtpWebRequest ftp = GetRequest(uri, username, password);
ftp.Method = WebRequestMethods.Ftp.ListDirectory;

FtpWebResponse response = (FtpWebResponse)ftp.GetResponse();
response.Close();
}
catch (Exception )
{
flag = false;
}
return flag;
}

Answer 2

你看看能不能通过对文件夹的属性做记录，然后定时查看是否被修改来实现。