C#操作FTP的類，Socket實現，網上找到的，整理了一下，處理了一些BUG，喜歡的拿去用，但不保證全部BUG已捉完。
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
namespace XML自動回執工具
{
/// <summary>
/// FTPClient 的摘要說明。
/// </summary>
/// <summary>
/// FTPClient 的摘要說明。
/// </summary>
public class FTPClient
{
#region 構造函數
/// <summary>
/// 缺省構造函數
/// </summary>
public FTPClient()
{
strRemoteHost = "";
strRemotePath = "/";
strRemoteUser = "";
strRemotePass = "";
strRemotePort = 21;
bConnected = false;
} /// <summary>
/// 構造函數
/// </summary>
/// <param name="remoteHost"></param>
/// <param name="remotePath"></param>
/// <param name="remoteUser"></param>
/// <param name="remotePass"></param>
/// <param name="remotePort"></param>
public FTPClient(string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort)
{
strRemoteHost = remoteHost;
strRemotePath = remotePath;
strRemoteUser = remoteUser;
strRemotePass = remotePass;
strRemotePort = remotePort;
Connect();
}
#endregion
#region 登陸
/// <summary>
/// FTP服務器IP地址
/// </summary>
private string strRemoteHost;
public string RemoteHost
{
get
{
return strRemoteHost;
}
set
{
strRemoteHost = value;
}
}
/// <summary>
/// FTP服務器端口
/// </summary>
private int strRemotePort;
public int RemotePort
{
get
{
return strRemotePort;
}
set
{
strRemotePort = value;
}
}
/// <summary>
/// 當前服務器目錄
/// </summary>
private string strRemotePath;
public string RemotePath
{
get
{
return strRemotePath;
}
set
{
strRemotePath = value;
}
}
/// <summary>
/// 登錄用戶賬號
/// </summary>
private string strRemoteUser;
public string RemoteUser
{
set
{
strRemoteUser = value;
}
}
/// <summary>
/// 用戶登錄密碼
/// </summary>
private string strRemotePass;
public string RemotePass
{
set
{
strRemotePass = value;
}
} /// <summary>
/// 是否登錄
/// </summary>
private Boolean bConnected;
public bool Connected
{
get
{
return bConnected;
}
}
#endregion
#region 鏈接
/// <summary>
/// 建立連接
/// </summary>
public void Connect()
{
socketControl = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Parse(RemoteHost), strRemotePort);
// 鏈接
try
{
socketControl.Connect(ep);
}
catch (Exception)
{
throw new IOException("Couldn't connect to remote server");
} // 獲取應答碼
ReadReply();
if (iReplyCode != 220)
{
DisConnect();
throw new IOException(strReply.Substring(4));
} // 登陸
SendCommand("USER " + strRemoteUser);
if (!(iReplyCode == 331 || iReplyCode == 230))
{
CloseSocketConnect();//關閉連接
throw new IOException(strReply.Substring(4));
}
if (iReplyCode != 230)
{
SendCommand("PASS " + strRemotePass);
if (!(iReplyCode == 230 || iReplyCode == 202))
{
CloseSocketConnect();//關閉連接
throw new IOException(strReply.Substring(4));
}
}
bConnected = true; // 切換到目錄
ChDir(strRemotePath);
}
/// <summary>
/// 關閉連接
/// </summary>
public void DisConnect()
{
if (socketControl != null)
{
SendCommand("QUIT");
}
CloseSocketConnect();
}
#endregion
#region 傳輸模式 /// <summary>
/// 傳輸模式:二進制類型、ASCII類型
/// </summary>
public enum TransferType { Binary, ASCII }; /// <summary>
/// 設置傳輸模式
/// </summary>
/// <param name="ttType">傳輸模式</param>
public void SetTransferType(TransferType ttType)
{
if (ttType == TransferType.Binary)
{
SendCommand("TYPE I");//binary類型傳輸
}
else
{
SendCommand("TYPE A");//ASCII類型傳輸
}
if (iReplyCode != 200)
{
throw new IOException(strReply.Substring(4));
}
else
{
trType = ttType;
}
}
/// <summary>
/// 獲得傳輸模式
/// </summary>
/// <returns>傳輸模式</returns>
public TransferType GetTransferType()
{
return trType;
}
#endregion
#region 文件操作
/// <summary>
/// 獲得文件列表
/// </summary>
/// <param name="strMask">文件名的匹配字符串</param>
/// <returns></returns>
public string[] Dir(string strMask)
{
// 建立鏈接
if (!bConnected)
{
Connect();
} //建立進行數據連接的socket
Socket socketData = CreateDataSocket();
//傳送命令
SendCommand("NLST " + strMask); //分析應答代碼
if (!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226))
{
throw new IOException(strReply.Substring(4));
} //獲得結果
strMsg = "";
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, 0);
strMsg += ASCII.GetString(buffer, 0, iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
//char[] seperator = { '\n' };
string[] seperator = { "\r\n" };
string[] strsFileList = strMsg.Split(seperator, StringSplitOptions.RemoveEmptyEntries);
socketData.Close();//數據socket關閉時也會有返回碼
if (iReplyCode != 226)
{
ReadReply();
if (iReplyCode != 226)
{
throw new IOException(strReply.Substring(4));
}
}
return strsFileList;
}
/// <summary>
/// 獲取文件大小
/// </summary>
/// <param name="strFileName">文件名</param>
/// <returns>文件大小</returns>
private long GetFileSize(string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("SIZE " + Path.GetFileName(strFileName));
long lSize = 0;
if (iReplyCode == 213)
{
lSize = Int64.Parse(strReply.Substring(4));
}
else
{
throw new IOException(strReply.Substring(4));
}
return lSize;
}
/// <summary>
/// 刪除
/// </summary>
/// <param name="strFileName">待刪除文件名</param>
public void Delete(string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("DELE " + strFileName);
if (iReplyCode != 250)
{
throw new IOException(strReply.Substring(4));
}
}
/// <summary>
/// 重命名(如果新文件名與已有文件重名,將覆蓋已有文件)
/// </summary>
/// <param name="strOldFileName">舊文件名</param>
/// <param name="strNewFileName">新文件名</param>
public void Rename(string strOldFileName, string strNewFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand("RNFR " + strOldFileName);
if (iReplyCode != 350)
{
throw new IOException(strReply.Substring(4));
}
// 如果新文件名與原有文件重名,將覆蓋原有文件
SendCommand("RNTO " + strNewFileName);
if (iReplyCode != 250)
{
throw new IOException(strReply.Substring(4));
}
}
#endregion
#region 上傳和下載
/// <summary>
/// 下載一批文件
/// </summary>
/// <param name="strFileNameMask">文件名的匹配字符串</param>
/// <param name="strFolder">本地目錄(不得以/結束)</param>
public void Get(string strFileNameMask, string strFolder)
{
if (!bConnected)
{
Connect();
}
string[] strFiles = Dir(strFileNameMask);
foreach (string strFile in strFiles)
{
if (!strFile.Equals(""))//一般來說strFiles的最後一個元素可能是空字符串
{
Get(strFile, strFolder, strFile);
}
}
}
/// <summary>
/// 下載一個文件
/// </summary>
/// <param name="strRemoteFileName">要下載的文件名</param>
/// <param name="strFolder">本地目錄(不得以/結束)</param>
/// <param name="strLocalFileName">保存在本地時的文件名</param>
public void Get(string strRemoteFileName, string strFolder, string strLocalFileName)
{
if (!bConnected)
{
Connect();
}
SetTransferType(TransferType.Binary);
if (strLocalFileName.Equals(""))
{
strLocalFileName = strRemoteFileName;
}
//if (!File.Exists(strLocalFileName))
//{
// Stream st = File.Create(strLocalFileName);
// st.Close();
//}
FileStream output = new FileStream(strFolder + "\\" + strLocalFileName, FileMode.Create);
Socket socketData = CreateDataSocket();
SendCommand("RETR " + strRemoteFileName);
if (!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReply.Substring(4));
}
while (true)
{
int iBytes = socketData.Receive(buffer, buffer.Length, 0);
output.Write(buffer, 0, iBytes);
if (iBytes <= 0)
{
break;
}
}
output.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if (!(iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReply.Substring(4));
}
}
}
/// <summary>
/// 上傳一批文件
/// </summary>
/// <param name="strFolder">本地目錄(不得以/結束)</param>
/// <param name="strFileNameMask">文件名匹配字符(可以包含*和?)</param>
public void Put(string strFolder, string strFileNameMask)
{
string[] strFiles = Directory.GetFiles(strFolder, strFileNameMask);
foreach (string strFile in strFiles)
{
//strFile是完整的文件名(包含路徑)
Put(strFile);
}
}
/// <summary>
/// 上傳一個文件
/// </summary>
/// <param name="strFileName">本地文件名</param>
public void Put(string strFileName)
{
if (!bConnected)
{
Connect();
}
Socket socketData = CreateDataSocket();
SendCommand("STOR " + Path.GetFileName(strFileName));
if (!(iReplyCode == 125 || iReplyCode == 150))
{
throw new IOException(strReply.Substring(4));
}
FileStream input = new FileStream(strFileName, FileMode.Open);
int iBytes = 0;
while ((iBytes = input.Read(buffer, 0, buffer.Length)) > 0)
{
socketData.Send(buffer, iBytes, 0);
}
input.Close();
if (socketData.Connected)
{
socketData.Close();
}
if (!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if (!(iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReply.Substring(4));
}
}
}
#endregion
#region 目錄操作
/// <summary>
/// 創建目錄
/// </summary>
/// <param name="strDirName">目錄名</param>
public void MkDir(string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand("MKD " + strDirName);
if (iReplyCode != 257)
{
throw new IOException(strReply.Substring(4));
}
}
/// <summary>
/// 刪除目錄
/// </summary>
/// <param name="strDirName">目錄名</param>
public void RmDir(string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand("RMD " + strDirName);
if (iReplyCode != 250)
{
throw new IOException(strReply.Substring(4));
}
}
/// <summary>
/// 改變目錄
/// </summary>
/// <param name="strDirName">新的工作目錄名</param>
public void ChDir(string strDirName)
{
if (strDirName.Equals(".") || strDirName.Equals(""))
{
return;
}
if (!bConnected)
{
Connect();
}
SendCommand("CWD " + strDirName);
if (iReplyCode != 250)
{
throw new IOException(strReply.Substring(4));
}
this.strRemotePath = strDirName;
}
#endregion
#region 內部變量
/// <summary>
/// 服務器返回的應答信息(包含應答碼)
/// </summary>
private string strMsg;
/// <summary>
/// 服務器返回的應答信息(包含應答碼)
/// </summary>
private string strReply;
/// <summary>
/// 服務器返回的應答碼
/// </summary>
private int iReplyCode;
/// <summary>
/// 進行控制連接的socket
/// </summary>
private Socket socketControl;
/// <summary>
/// 傳輸模式
/// </summary>
private TransferType trType;
/// <summary>
/// 接收和發送數據的緩衝區
/// </summary>
private static int BLOCK_SIZE = 512;
Byte[] buffer = new Byte[BLOCK_SIZE];
/// <summary>
/// 編碼方式
/// </summary>
Encoding ASCII = Encoding.ASCII;
#endregion
#region 內部函數
/// <summary>
/// 將一行應答字符串記錄在strReply和strMsg
/// 應答碼記錄在iReplyCode
/// </summary>
private void ReadReply()
{
strMsg = "";
strReply = ReadLine();
iReplyCode = Int32.Parse(strReply.Substring(0, 3));
} /// <summary>
/// 建立進行數據連接的socket
/// </summary>
/// <returns>數據連接socket</returns>
private Socket CreateDataSocket()
{
SendCommand("PASV");
if (iReplyCode != 227)
{
throw new IOException(strReply.Substring(4));
}
int index1 = strReply.IndexOf('(');
int index2 = strReply.IndexOf(')');
string ipData =
strReply.Substring(index1 + 1, index2 - index1 - 1);
int[] parts = new int[6];
int len = ipData.Length;
int partCount = 0;
string buf = "";
for (int i = 0; i < len && partCount <= 6; i++)
{
char ch = Char.Parse(ipData.Substring(i, 1));
if (Char.IsDigit(ch))
buf += ch;
else if (ch != ',')
{
throw new IOException("Malformed PASV strReply: " + strReply);
}
if (ch == ',' || i + 1 == len)
{
try
{
parts[partCount++] = Int32.Parse(buf);
buf = "";
}
catch (Exception)
{
throw new IOException("Malformed PASV strReply: " + strReply);
}
}
}
string ipAddress = parts[0] + "." + parts[1] + "." +
parts[2] + "." + parts[3];
int port = (parts[4] << 8) + parts[5];
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Parse(ipAddress), port);
try
{
s.Connect(ep);
}
catch (Exception)
{
throw new IOException("Can't connect to remote server");
}
return s;
}
/// <summary>
/// 關閉socket連接(用於登錄以前)
/// </summary>
private void CloseSocketConnect()
{
if (socketControl != null)
{
socketControl.Close();
socketControl = null;
}
bConnected = false;
}
/// <summary>
/// 讀取Socket返回的所有字符串
/// </summary>
/// <returns>包含應答碼的字符串行</returns>
private string ReadLine()
{
while (true)
{
int iBytes = socketControl.Receive(buffer, buffer.Length, 0);
strMsg += ASCII.GetString(buffer, 0, iBytes);
if (iBytes < buffer.Length)
{
break;
}
}
char[] seperator = { '\n' };
string[] mess = strMsg.Split(seperator);
if (strMsg.Length > 2)
{
strMsg = mess[mess.Length - 2];
//seperator[0]是10,換行符是由13和0組成的,分隔後10後面雖沒有字符串,
//但也會分配爲空字符串給後面(也是最後一個)字符串數組,
//所以最後一個mess是沒用的空字符串
//但爲什麼不直接取mess[0],因爲只有最後一行字符串應答碼與信息之間有空格
}
else
{
strMsg = mess[0];
}
if (!strMsg.Substring(3, 1).Equals(" "))//返回字符串正確的是以應答碼(如220開頭,後面接一空格,再接問候字符串)
{
return ReadLine();
}
return strMsg;
}
/// <summary>
/// 發送命令並獲取應答碼和最後一行應答字符串
/// </summary>
/// <param name="strCommand">命令</param>
private void SendCommand(String strCommand)
{
Byte[] cmdBytes = Encoding.ASCII.GetBytes((strCommand + "\r\n").ToCharArray());
socketControl.Send(cmdBytes, cmdBytes.Length, 0);
ReadReply();
}
#endregion
}
}