文章修改2011-12-3号
char[] seperator = { '/n' }; 现改为 char[] seperator = { '\n' };//
今天用到下载FTP里所有文件和目录的程序，网上找了很久没找到，没办法只好自己写了！代码写得不太优化希望有兴趣的朋友可以研究优化一下性能。
共两个类库： 一、主类 FtpDownClass 和 二、泛型辅助类。
一、主类 FtpDownClass
命名空间：
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net.Sockets;
using System.Text;
using System.Net;
using System.IO;
using System.Collections.Generic;
//--功能描述：FTP批量上传和下载类，可遍历FTP所有文件及目录 //--作者：童正义 //--QQ：185644777 //--日期：2010-7-2 /// /// FTP上传、下载类 /// public class FtpDownClass { private string strRemoteHost; private int strRemotePort; private string strRemotePath; private string strRemoteUser; private string strRemotePass; private Boolean bConnected; #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; /// /// 传输模式:二进制类型、ASCII类型 /// public enum TransferType { /// /// Binary /// Binary, /// /// ASCII /// ASCII }; /// /// 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.Default; //Encoding ASCII = Encoding.ASCII; #endregion #region 内部函数 #region 构造函数 /// /// 缺省构造函数 /// public FtpDownClass() { strRemoteHost = ""; strRemotePath = ""; strRemoteUser = ""; strRemotePass = ""; strRemotePort = 21; bConnected = false; } /// /// 构造函数 /// public FtpDownClass(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 /// 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 /// /// 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 /// 返回目录下文件名 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 if (strMask != "") { SendCommand("NLST " + strMask); } /* SendCommand("ls " + this.strRemotePath);*/ //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 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; } /// /// 文件删除 /// /// 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 protected int i = 0; /// /// 批量下载文件，可遍历所有文件及子目录 /// /// 目录正则匹配，输入"*",可下载所有文件 /// 本地保存目录(不得以/结束) public void Get(string strFileNameMask, string strFolder) { if (!bConnected) { Connect(); } string[] strFiles = Dir(strFileNameMask); Dictionary dic = new Dictionary(); 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 { dic.Add(strFile, i); } } 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 { if (strFile.IndexOf('.') > 0) { if (i > 0) { for (int n = 0; n < i - Convert.ToInt32(dic[strFile].ToString()); n++) { ChDir("../"); } } Get(strFile, strFolder, strFile); } else { ChDir(strFile); i++; Get("*", strFolder + "//" + strFile.Substring(0, strFile.Length - 1)); //子目录 } } } } /// /// 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 (strLocalFileName.EndsWith("/r")) { strLocalFileName = strLocalFileName.Substring(0, strLocalFileName.Length - 1); } if (strFolder.EndsWith("/r")) { strFolder = strFolder.Substring(0, strFolder.Length - 1); } if (!Directory.Exists(strFolder)) { Directory.CreateDirectory(strFolder); } 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X和?) public void Put(string strFolder, string strFileNameMask) { string[] strFiles = Directory.GetFiles(strFolder, strFileNameMask); foreach (string strFile in strFiles) { Put(strFile); } } /// /// 上传一批文件包含文件夹,支持无限级文件夹 /// ///本地目录(不得以/结束) /// 文件名匹配字符(可以包含X和?) /// 是否包含文件夹 public void Put(string strFolder, string strFileNameMask, bool UpDir) { string TmpDir; if (UpDir) { DirectoryInfo directory; directory = new DirectoryInfo(strFolder); foreach (FileSystemInfo sub in directory.GetFileSystemInfos()) { if (sub.Attributes == FileAttributes.Directory) { try { MkDir(sub.Name); } catch { } TmpDir = strFolder + sub.Name + "//"; this.ChDir(sub.Name); Put(TmpDir, strFileNameMask, true); //递归上传 } else { Put(sub.FullName); } } this.ChDir("../"); //返回上一级目录 } else { Put(strFolder, strFileNameMask); } } /// /// 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 private 私有方法 /// /// 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 = ASCII.GetBytes((strCommand + "/r/n").ToCharArray()); socketControl.Send(cmdBytes, cmdBytes.Length, 0); ReadReply(); } #endregion #endregion }
二、泛型辅助类 TopDictionary
/// /// 符合TOP习惯的纯字符串字典结构。 /// public class TopDictionary : Dictionary { public const string DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss"; public TopDictionary() { } public TopDictionary(IDictionary dictionary) : base(dictionary) { } /// /// 添加一个新的键值对。空键或者空值的键值对将会被忽略。 /// /// 键名称 /// 键对应的值，目前支持：string, int, long, double, bool, DateTime类型 public void Add(string key, object value) { string strValue; if (value == null) { strValue = null; } else if (value is string) { strValue = (string)value; } else if (value is Nullable) { Nullable dateTime = value as Nullable; strValue = dateTime.Value.ToString(DATE_TIME_FORMAT); } else if (value is Nullable) { strValue = (value as Nullable).Value.ToString(); } else if (value is Nullable) { strValue = (value as Nullable).Value.ToString(); } else if (value is Nullable) { strValue = (value as Nullable).Value.ToString(); } else if (value is Nullable) { strValue = (value as Nullable).Value.ToString().ToLower(); } else { strValue = value.ToString(); } this.Add(key, strValue); } public new void Add(string key, string value) { if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(value)) { base.Add(key, value); } } }
三、批量下载调用示例
string DirPath=""; //保存目录
Lib.FtpDownClass ftp = new DataBaseBak.Lib.FtpDownClass();
ftp.RemoteHost = FTP地址;
ftp.RemotePort = 端口;
ftp.RemotePath = 主目录;
ftp.RemoteUser = 帐号;
ftp.RemotePass = 密码;
Console.WriteLine("开始下载文件，请不要关闭程序，下载完将会提示");
ftp.Get("*", DirPath);
Console.WriteLine("下载完成");
