using System;
using System.NET;
using System.IO;
using System.Text;
using System.NET.Sockets;
namespace zhangyuk.NET.csdn.blog.ftpclient
{
?///
?/// FTP Client
?///
?public class FTPClient
?{
? #region 构造函数
? ///
? /// 缺省构造函数
? ///
? public FTPClient()
? {
?? strRemoteHost? = "";
?? strRemotePath? = "";
?? strRemoteUser? = "";
?? strRemotePass? = "";
?? strRemotePort? = 21;
?? bConnected???? = false;
? }
? ///
? /// 构造函数
? ///
? ///
? ///
? ///
? ///
? ///
? 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 登陆
? ///
? /// FTP服务器IP地址
? ///
? private string strRemoteHost;
? public string RemoteHost
? {
?? get
?? {
??? return strRemoteHost;
?? }
?? set
?? {
??? strRemoteHost = value;
?? }
? }
? ///
? /// FTP服务器端口
? ///
? private int strRemotePort;
? public int RemotePort
? {
?? get
?? {
??? return strRemotePort;
?? }
?? set
?? {
??? strRemotePort = value;
?? }
? }
? ///
? /// 当前服务器目录
? ///
? private string strRemotePath;
? public string RemotePath
? {
?? get
?? {
??? return strRemotePath;
?? }
?? set
?? {
??? strRemotePath = value;
?? }
? }
? ///
? /// 登录用户账号
? ///
? private string strRemoteUser;
? public string RemoteUser
? {
?? set
?? {
??? strRemoteUser = value;
?? }
? }
? ///
? /// 用户登录密码
? ///
? private string strRemotePass;
? public string RemotePass
? {
?? set
?? {
??? strRemotePass = value;
?? }
? }
? ///
? /// 是否登录
? ///
? private Boolean bConnected;
? public bool Connected
? {
?? get
?? {
??? return bConnected;
?? }
? }
? #endregion
? #region 链接
? ///
? /// 建立连接
? ///
? public void Connect()
? {
?? socketControl = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
?? IPEndPoint ep = new IPEndPoint(IPAddress.Parse(RemoteHost), strRemotePort);
?? // 链接
?? try
?? {
??? socketControl.Connect(ep);
?? }
?? catch(Exception)
?? {
??? throw new IOException("Couldn't connect to remote server");
?? }
?? // 获取应答码
?? ReadReply();
?? if(iReplyCode != 220)
?? {
??? DisConnect();
??? throw new IOException(strReply.Substring(4));
?? }
?? // 登陆
?? SendCommand("USER "+strRemoteUser);
?? if( !(iReplyCode == 331 || iReplyCode == 230) )
?? {
??? CloseSocketConnect();//关闭连接
??? throw new IOException(strReply.Substring(4));
?? }
?? if( iReplyCode != 230 )
?? {
??? SendCommand("PASS "+strRemotePass);
??? if( !(iReplyCode == 230 || iReplyCode == 202) )
??? {
???? CloseSocketConnect();//关闭连接
???? throw new IOException(strReply.Substring(4));
??? }
?? }
?? bConnected = true;
?? // 切换到目录
?? ChDir(strRemotePath);
? }
???
? ///
? /// 关闭连接
? ///
? public void DisConnect()
? {
?? if( socketControl != null )
?? {
??? SendCommand("QUIT");
?? }
?? CloseSocketConnect();
? }
? #endregion
? #region 传输模式
? ///
? /// 传输模式:二进制类型、ASCII类型
? ///
? public enum TransferType {Binary,ASCII};
? ///
? /// 设置传输模式
? ///
? /// 传输模式
? public void SetTransferType(TransferType ttType)
? {
?? if(ttType == TransferType.Binary)
?? {
??? SendCommand("TYPE I");//binary类型传输
?? }
?? else
?? {
??? SendCommand("TYPE A");//ASCII类型传输
?? }
?? if (iReplyCode != 200)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
?? else
?? {
??? trType = ttType;
?? }
? }
? ///
? /// 获得传输模式
? ///
? ///
? public TransferType GetTransferType()
? {
?? return trType;
? }
???
? #endregion
? #region 文件操作
? ///
? /// 获得文件列表
? ///
? /// 文件名的匹配字符串
? ///
? public string[] Dir(string strMask)
? {
?? // 建立链接
?? if(!bConnected)
?? {
??? Connect();
?? }
?? //建立进行数据连接的socket
?? Socket socketData = CreateDataSocket();
??
?? //传送命令
?? SendCommand("NLST " + strMask);
?? //分析应答代码
?? if(!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226))
?? {
??? throw new IOException(strReply.Substring(4));
?? }
?? //获得结果
?? 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[] strsFileList = strMsg.Split(seperator);
?? socketData.Close();//数据socket关闭时也会有返回码
?? if(iReplyCode != 226)
?? {
??? ReadReply();
??? if(iReplyCode != 226)
??? {
???? throw new IOException(strReply.Substring(4));
??? }
?? }
?? return strsFileList;
? }
???
? ///
? /// 获取文件大小
? ///
? /// 文件名
? ///
? 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;
? }
? ///
? /// 删除
? ///
? /// 待删除文件名
? public void Delete(string strFileName)
? {
?? if(!bConnected)
?? {
??? Connect();
?? }
?? SendCommand("DELE "+strFileName);
?? if(iReplyCode != 250)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
? }
???
? ///
? /// 重命名(如果新文件名与已有文件重名,将覆盖已有文件)
? ///
? /// 旧文件名
? /// 新文件名
? public void Rename(string strOldFileName,string strNewFileName)
? {
?? if(!bConnected)
?? {
??? Connect();
?? }
?? SendCommand("RNFR "+strOldFileName);
?? if(iReplyCode != 350)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
?? //? 如果新文件名与原有文件重名,将覆盖原有文件
?? SendCommand("RNTO "+strNewFileName);
?? if(iReplyCode != 250)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
? }
? #endregion
? #region 上传和下载
? ///
? /// 下载一批文件
? ///
? /// 文件名的匹配字符串
? /// 本地目录(不得以\结束)
? public void Get(string strFileNameMask,string strFolder)
? {
?? if(!bConnected)
?? {
??? Connect();
?? }
?? string[] strFiles = Dir(strFileNameMask);
?? foreach(string strFile in strFiles)
?? {
??? if(!strFile.Equals(""))//一般来说strFiles的最后一个元素可能是空字符串
??? {
???? Get(strFile,strFolder,strFile);
??? }
?? }
? }
???
? ///
? /// 下载一个文件
? ///
? /// 要下载的文件名
? /// 本地目录(不得以\结束)
? /// 保存在本地时的文件名
? 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));
??? }
?? }
? }
???
? ///
? /// 上传一批文件
? ///
? /// 本地目录(不得以\结束)
? /// 文件名匹配字符(可以包含*和?)
? 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(包含路径)
??? Put(strFile);
?? }
? }
???
? ///
? /// 上传一个文件
? ///
? /// 本地文件名
? 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 目录操作
? ///
? /// 创建目录
? ///
? /// 目录名
? public void MkDir(string strDirName)
? {
?? if(!bConnected)
?? {
??? Connect();
?? }
?? SendCommand("MKD "+strDirName);
?? if(iReplyCode != 257)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
? }
???
?
? ///
? /// 删除目录
? ///
? /// 目录名
? public void RmDir(string strDirName)
? {
?? if(!bConnected)
?? {
??? Connect();
?? }
?? SendCommand("RMD "+strDirName);
?? if(iReplyCode != 250)
?? {
??? throw new IOException(strReply.Substring(4));
?? }
? }
???
?
? ///
? /// 改变目录
? ///
? /// 新的工作目录名
? 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 内部变量
? ///
? /// 服务器返回的应答信息(包含应答码)
? ///
? private string strMsg;
? ///
? /// 服务器返回的应答信息(包含应答码)
? ///
? private string strReply;
? ///
? /// 服务器返回的应答码
? ///
? private int iReplyCode;
? ///
? /// 进行控制连接的socket
? ///
? private Socket socketControl;
? ///
? /// 传输模式
? ///
? private TransferType trType;
? ///
? /// 接收和发送数据的缓冲区
? ///
? private static int BLOCK_SIZE = 512;
? Byte[] buffer = new Byte[BLOCK_SIZE];
? ///
? /// 编码方式
? ///
? Encoding ASCII = Encoding.ASCII;
? #endregion
? #region 内部函数
? ///
? /// 将一行应答字符串记录在strReply和strMsg
? /// 应答码记录在iReplyCode
? ///
? private void ReadReply()
? {
?? strMsg = "";
?? strReply = ReadLine();
?? iReplyCode = Int32.Parse(strReply.Substring(0,3));
? }
? ///
? /// 建立进行数据连接的socket
? ///
? ///
? 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;
? }
? ///
? /// 关闭socket连接(用于登录以前)
? ///
? private void CloseSocketConnect()
? {
?? if(socketControl!=null)
?? {
??? socketControl.Close();
??? socketControl = null;
?? }
?? bConnected = false;
? }
?
? ///
? /// 读取Socket返回的所有字符串
? ///
? ///
? 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,换行符是由13和0组成的,分隔后10后面虽没有字符串,
??? //但也会分配为空字符串给后面(也是最后一个)字符串数组,
??? //所以最后一个mess是没用的空字符串
??? //但为什么不直接取mess[0],因为只有最后一行字符串应答码与信息之间有空格
?? }
?? else
?? {
??? strMsg = mess[0];
?? }
?? if(!strMsg.Substring(3,1).Equals(" "))//返回字符串正确的是以应答码(如220开头,后面接一空格,再接问候字符串)
?? {
??? return ReadLine();
?? }
?? return strMsg;
? }
? ///
? /// 发送命令并获取应答码和最后一行应答字符串
? ///
? /// 命令
? private void SendCommand(String strCommand)
? {
?? Byte[] cmdBytes =
?? Encoding.ASCII.GetBytes((strCommand+"\r\n").ToCharArray());
?? socketControl.Send(cmdBytes, cmdBytes.Length, 0);
?? ReadReply();
? }
? #endregion
?}
}
?