FTP,(File Transfer Protocol),就是檔案傳輸協議，用于互聯網雙向傳輸，控制檔案下載空間在服務器復制檔案從本地計算機或本地上傳檔案復制到服務器上的空間，
因為有一個奇葩的需求，客戶要求把一個服務器的檔案拷貝到另一個服務器還要求用ftp，所以研究了一番ftp.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
using System.Windows.Forms;
namespace TestFTP
{
public class FtpHelper
{
private string ftpServerIP;
private string ftpRemotePath;
private string ftpUserID;
private string ftpPassword;
private string ftpURI;
/// <summary>
/// 連接FTP
/// </summary>
/// <param name="FtpServerIP">FTP連接地址</param>
/// <param name="FtpRemotePath">指定FTP連接成功后的當前目錄, 如果不指定即默認為根目錄</param>
/// <param name="FtpUserID">用戶名</param>
/// <param name="FtpPassword">密碼</param>
public FtpHelper(string ServerIP, string RemotePath, string UserID, string Password)
{
ftpServerIP = ServerIP;
ftpRemotePath = RemotePath;
ftpUserID = UserID;
ftpPassword = Password;
ftpURI = "ftp://" + ftpServerIP + ftpRemotePath + "/";
}
/// <summary>
/// 上傳
/// </summary>
/// <param name="filename">檔案名</param>
public void UploadFile(string FileName)
{
FileInfo fileInfo = new FileInfo(FileName);
string uri = ftpURI + fileInfo.Name;
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.ContentLength = fileInfo.Length;
int BufferSize = 2048;
byte[] buff = new byte[BufferSize];
int ContentLength;
FileStream fs = fileInfo.OpenRead();
try
{
Stream strm = reqFTP.GetRequestStream();
ContentLength = fs.Read(buff, 0, BufferSize);
while (ContentLength != 0)
{
strm.Write(buff, 0, ContentLength);
ContentLength = fs.Read(buff, 0, BufferSize);
}
strm.Close();
fs.Close();
}
catch (Exception ex)
{
throw new Exception("Ftphelper Upload Error --> " + ex.Message);
}
}
/// <summary>
/// 下載
/// </summary>
/// <param name="filePath">檔案路徑</param>
/// <param name="fileName">檔案名</param>
public void DownloadFile(string FileName, string LocalSavePath)
{
FtpWebRequest reqFTP;
try
{
FileStream outputStream = new FileStream(LocalSavePath, FileMode.Create);
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpUserID + ":" + ftpPassword + "@" + ftpServerIP + "/" + FileName));
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.UsePassive = false;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
}
catch (Exception ex)
{
//throw ex;
MessageBox.Show("ex: " + ex);
}
}
/// <summary>
/// 洗掉檔案夾
/// </summary>
/// <param name="folderName">檔案夾名</param>
public void RemoveDirectory(string folderName)
{
try
{
string uri = ftpURI + folderName;
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.KeepAlive = false;
reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
reqFTP.UsePassive = false;
string result = String.Empty;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
long size = response.ContentLength;
Stream datastream = response.GetResponseStream();
StreamReader sr = new StreamReader(datastream);
result = sr.ReadToEnd();
sr.Close();
datastream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper Delete Error --> " + ex.Message + " 檔案名:" + folderName);
}
}
/// <summary>
/// 獲取當前目錄下明細(包含檔案和檔案夾)
/// </summary>
/// <returns>名稱陣列</returns>
public string[] GetFilesDetailList()
{
string[] downloadFiles;
try
{
StringBuilder result = new StringBuilder();
FtpWebRequest ftp;
ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
ftp.UsePassive = false;
WebResponse response = ftp.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
//while (reader.Read() > 0)
//{
//}
string line = reader.ReadLine();
//line = reader.ReadLine();
//line = reader.ReadLine();
while (line != null)
{
result.Append(line);
result.Append("\n");
line = reader.ReadLine();
}
result.Remove(result.ToString().LastIndexOf("\n"), 1);
reader.Close();
response.Close();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
downloadFiles = null;
throw new Exception("FtpHelper Error --> " + ex.Message);
}
}
/// <summary>
/// 獲取當前目錄下檔案串列(僅檔案)
/// </summary>
/// <returns></returns>
public string[] GetFileList(string mask)
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
FtpWebRequest reqFTP;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI));
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
reqFTP.UsePassive = false;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
string line = reader.ReadLine();
while (line != null)
{
if (mask.Trim() != string.Empty && mask.Trim() != "*.*")
{
string mask_ = mask.Substring(0, mask.IndexOf("*"));
if (line.Substring(0, mask_.Length) == mask_)
{
result.Append(line);
result.Append("\n");
}
}
else
{
result.Append(line);
result.Append("\n");
}
line = reader.ReadLine();
}
result.Remove(result.ToString().LastIndexOf('\n'), 1);
reader.Close();
response.Close();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
downloadFiles = null;
if (ex.Message.Trim() != "遠程服務器回傳錯誤: (550) 檔案不可用(例如，未找到檔案，無法訪問檔案)，")
{
throw new Exception("FtpHelper GetFileList Error --> " + ex.Message.ToString());
}
return downloadFiles;
}
}
/// <summary>
/// 獲取當前目錄下所有的檔案夾串列(僅檔案夾)
/// </summary>
/// <returns></returns>
public string[] GetDirectoryList()
{
string[] drectory = GetFilesDetailList();
string m = string.Empty;
foreach (string str in drectory)
{
int dirPos = str.IndexOf("<DIR>");
if (dirPos > 0)
{
/*判斷 Windows 風格*/
m += str.Substring(dirPos + 5).Trim() + "\n";
}
else if (str.Trim().Substring(0, 1).ToUpper() == "D")
{
/*判斷 Unix 風格*/
string dir = str.Substring(54).Trim();
if (dir != "." && dir != "..")
{
m += dir + "\n";
}
}
}
char[] n = new char[] { '\n' };
return m.Split(n);
}
/// <summary>
/// 判斷當前目錄下指定的子目錄是否存在
/// </summary>
/// <param name="RemoteDirectoryName">指定的目錄名</param>
public bool DirectoryExist(string RemoteDirectoryName)
{
string[] dirList = GetDirectoryList();
foreach (string str in dirList)
{
if (str.Trim() == RemoteDirectoryName.Trim())
{
return true;
}
}
return false;
}
/// <summary>
/// 判斷當前目錄下指定的檔案是否存在
/// </summary>
/// <param name="RemoteFileName">遠程檔案名</param>
public bool FileExist(string RemoteFileName)
{
string[] fileList = GetFileList("*.*");
foreach (string str in fileList)
{
if (str.Trim() == RemoteFileName.Trim())
{
return true;
}
}
return false;
}
/// <summary>
/// 創建檔案夾
/// </summary>
/// <param name="dirName"></param>
public void MakeDir(string dirName)
{
FtpWebRequest reqFTP;
try
{
// dirName = name of the directory to create.
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + dirName));
reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper MakeDir Error --> " + ex.Message);
}
}
/// <summary>
/// 獲取指定檔案大小
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public long GetFileSize(string filename)
{
FtpWebRequest reqFTP;
long fileSize = 0;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename));
reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
fileSize = response.ContentLength;
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper GetFileSize Error --> " + ex.Message);
}
return fileSize;
}
/// <summary>
/// 改名
/// </summary>
/// <param name="currentFilename"></param>
/// <param name="newFilename"></param>
public void ReName(string currentFilename, string newFilename)
{
FtpWebRequest reqFTP;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + currentFilename));
reqFTP.Method = WebRequestMethods.Ftp.Rename;
reqFTP.RenameTo = newFilename;
reqFTP.UseBinary = true;
reqFTP.UsePassive = false;
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
throw new Exception("FtpHelper ReName Error --> " + ex.Message);
}
}
/// <summary>
/// 移動檔案
/// </summary>
/// <param name="currentFilename"></param>
/// <param name="newFilename"></param>
public void MovieFile(string currentFilename, string newDirectory)
{
ReName(currentFilename, newDirectory);
}
/// <summary>
/// 切換當前目錄
/// </summary>
/// <param name="DirectoryName"></param>
/// <param name="IsRoot">true 絕對路徑 false 相對路徑</param>
public void GotoDirectory(string DirectoryName, bool IsRoot)
{
if (IsRoot)
{
ftpRemotePath = DirectoryName;
}
else
{
ftpRemotePath += DirectoryName + "/";
}
ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}
}
}
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