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  • C#写的ftp上传类

    这个类是我之前在一个什么地方看到的不记得了，最近要用着大文件上传，翻箱倒柜的找出来。
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    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
      
    namespace WindowsForms
    {
        public class FTPClient
        {
            #region 构造函数
            /// 
            /// 构造函数
            /// 
            ///
            private static FTPClient instance;
            private static object lockObj = new object();
            /// 
            /// 主机地址
            /// 
            private string strRemoteHost = "";
            /// 
            /// 本地文件路径
            /// 
            private string strRemotePath = "";
            /// 
            /// FTP用户名
            /// 
            private string strRemoteUser = "";
            /// 
            /// FTP密码
            /// 
            private string strRemotePass = "";
            private int strRemotePort = 21;
      
            public FTPClient()
            { }
      
            public static FTPClient Instance()
            {
                lock (lockObj)
                {
                    if (instance == null)
                    {
                        instance = new FTPClient();
                    }
                }
                return instance;
            }
      
            /// 
            /// 带参数的构造函数
            /// 
            /// 主机地址
            /// 路径
            /// 用户名
            /// 密码
            /// 端口
            public void FTPClientPram(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
            /// 
            public string RemoteHost
            {
                get
                {
                    return strRemoteHost;
                }
                set
                {
                    strRemoteHost = value;
                }
            }
            /// 
            /// FTP服务器端口
            /// 
            public int RemotePort
            {
                get
                {
                    return strRemotePort;
                }
                set
                {
                    strRemotePort = value;
                }
            }
            /// 
            /// 当前服务器目录
            /// 
            public string RemotePath
            {
                get
                {
                    return strRemotePath;
                }
                set
                {
                    strRemotePath = value;
                }
            }
            /// 
            /// 登录用户账号
            /// 
            public string RemoteUser
            {
                set
                {
                    strRemoteUser = value;
                }
            }
            /// 
            /// 用户登录密码
            /// 
            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("bye");
                    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
            /// 
            /// 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
            /// 文件大小
            public 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
      
            /// 
            /// 上传一个文件
            /// 
            /// 本地文件名
            public void Put(string strFileName)
            {
                if (!bConnected)
                {
                    Connect();
                }
      
                Socket socketData = CreateDataSocket();
                SendCommand("TYPE I");
                if (iReplyCode != 200)
                {
                    throw new IOException(strReply.Substring(4));
                }
                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 = 102400;
                while ((iBytes = input.Read(buffer, 0, buffer.Length)) > 0)
                {
                    socketData.Send(buffer, iBytes, 0);
                }
                input.Close();
                if (socketData.Connected)
                {
                    socketData.Close();
                }
                ReadReply();
                //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 = 10240;
            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
            /// 
            /// 数据连接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
            /// 
            /// 包含应答码的字符串行
            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
        }
      
      
    }
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  • 原文地址：https://www.cnblogs.com/yexinw/p/2067587.html
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