FTP帮助类

[c#]代码库
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
 
namespace WindowsFormsApplication1
{
    #region 文件信息结构  
    public struct FileStruct 
    { 
        public string Flags; 
        public string Owner; 
        public string Group; 
        public bool IsDirectory; 
        public DateTime CreateTime; 
        public string Name; 
    } 
    public enum FileListStyle 
    { 
        UnixStyle, 
        WindowsStyle, 
        Unknown 
    } 
    #endregion 
    class FtpHelper
    {
        /// <summary>  
        /// ftp用户名，匿名为“”  
        /// </summary>  
        private string ftpUser; 
   
        /// <summary>  
        /// ftp用户密码，匿名为“”  
        /// </summary>  
        private string ftpPassWord; 
   
        /// <summary>  
        ///通过用户名，密码连接到FTP服务器  
        /// </summary>  
        /// <param name="ftpUser">ftp用户名，匿名为“”</param>  
        /// <param name="ftpPassWord">ftp登陆密码，匿名为“”</param>  
        public  FtpHelper(string ftpUser, string ftpPassWord) 
        { 
            this.ftpUser = ftpUser; 
            this.ftpPassWord = ftpPassWord; 
        }
 
        public FtpHelper()
       {
            this.ftpUser = ""; 
            this.ftpPassWord = ""; 
       }
        /// <summary>
        /// 删除FTP服务器文件夹（包括文件）
        /// </summary>
        /// <param name="ftpPath"></param>
        public void DeleteAllFile(string ftpPath)
        {
 
            try
            {
                List<FileStruct> files = ListFilesAndDirectories(ftpPath);
                foreach (FileStruct f in files)
                {
                    if (f.IsDirectory) //文件夹，递归查询  
                    {
                        DeleteAllFile(ftpPath + "/" + f.Name);
 
                    }
                    else
                    {
                        DeleteFile(ftpPath + "/" + f.Name);
                    }
                }
                if (ftpPath.Split('/').Length > 4)
                {
                    DeleteDirectory(ftpPath);
                }//是否是根目录
 
            }
            catch (System.Net.WebException we)
            {
                DeleteDirectory(ftpPath);
            }
            catch (Exception ex)
            {
 
                throw ex;
            }
        }
        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="currenFilePath"></param>
        private void DeleteFile(string currenFilePath)
        {
            try
            {
                //实例化FTP连接
                FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(currenFilePath));
                request.Credentials = new NetworkCredential(ftpUser, ftpPassWord);
                request.UsePassive = false;
                //指定FTP操作类型为创建目录
                request.Method = WebRequestMethods.Ftp.DeleteFile;
                //获取FTP服务器的响应
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                response.Close();
 
            }
            catch (Exception ex)
            {
                throw ex;
            }
 
        }
        /// <summary>
        /// 删除文件夹
        /// </summary>
        /// <param name="currentDirectoryPath"></param>
        private void DeleteDirectory(string currentDirectoryPath)
        {
            try
            {
                //实例化FTP连接
                FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(currentDirectoryPath));
                request.Credentials = new NetworkCredential(ftpUser, ftpPassWord);
                request.UsePassive = false;
                //指定FTP操作类型为创建目录
                request.Method = WebRequestMethods.Ftp.RemoveDirectory;
                //获取FTP服务器的响应
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                response.Close();
 
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        /// <summary>  
        /// 上传文件到Ftp服务器  
        /// </summary>  
        /// <param name="uri">把上传的文件保存为ftp服务器文件的uri,如"ftp://192.168.1.104/capture-212.avi"</param>  
        /// <param name="upLoadFile">要上传的本地的文件路径，如D:\capture-2.avi</param>  
        public void UpLoadFile(string UpLoadUri, string upLoadFile) 
        { 
            Stream requestStream = null; 
            FileStream fileStream = null; 
            FtpWebResponse uploadResponse = null; 
   
            try
            { 
                Uri uri = new Uri(UpLoadUri);   
                FtpWebRequest uploadRequest = (FtpWebRequest)WebRequest.Create(uri); 
                uploadRequest.Method = WebRequestMethods.Ftp.UploadFile;
                uploadRequest.Credentials = new NetworkCredential(ftpUser, ftpPassWord);
                uploadRequest.UsePassive = false;
                uploadRequest.Timeout = 900000;
                uploadRequest.ReadWriteTimeout = 900000;
                requestStream = uploadRequest.GetRequestStream(); 
                fileStream = File.Open(upLoadFile, FileMode.Open);  
                byte[] buffer = new byte[2048]; 
                int bytesRead; 
                while (true) 
                { 
                    bytesRead = fileStream.Read(buffer, 0, buffer.Length); 
                    if (bytesRead == 0) 
                        break; 
                    requestStream.Write(buffer, 0, bytesRead); 
                } 
                requestStream.Close(); 
   
                uploadResponse = (FtpWebResponse)uploadRequest.GetResponse(); 
                
   
            } 
            catch (Exception ex) 
            { 
                throw new Exception("上传文件到ftp服务器出错，文件名：" + upLoadFile + "异常信息：" + ex.ToString()); 
            } 
            finally
            { 
                if (uploadResponse != null) 
                    uploadResponse.Close(); 
                if (fileStream != null) 
                    fileStream.Close(); 
                if (requestStream != null) 
                    requestStream.Close(); 
            } 
        }
        /// <summary>
        /// 上传整个文件夹
        /// </summary>
        /// <param name="ftpUri">上传到FTP的路径</param>
        /// <param name="upLoadFile">要上传的本地文件夹目录</param>
        public void UploadDirectory(string ftpPath, string upLoadFile)
        {
            try
            {
                string dirName = upLoadFile.Substring(upLoadFile.LastIndexOf(@"\") + 1);//文件夹名称
                if (!CheckDirectoryExist(ftpPath, dirName))
                {
                    MakeDir(ftpPath, dirName);
                }
                List<List<string>> infos = GetDirDetails(upLoadFile); //获取当前目录下的所有文件和文件夹  
                //先上传文件
                for (int i = 0; i < infos[0].Count; i++)
                {
                    UpLoadFile(ftpPath + "/" + dirName + "/" + infos[0][i], upLoadFile + @"\" + infos[0][i]);
                }
                //再处理文件夹
                for (int i = 0; i < infos[1].Count; i++)
                {
                    UploadDirectory(ftpPath + @"/" + dirName, upLoadFile + @"\" + infos[1][i]);
                }
            }
            catch (System.Net.WebException we)
            {
                UploadDirectory(ftpPath, upLoadFile);
            }
            catch (Exception ex)
            {
                throw ex;
            }
 
         
        }
        /// <summary>
        /// 获取目录下的详细信息
        /// </summary>
        /// <param name="localDir">本机目录</param>
        /// <returns></returns>
        private static List<List<string>> GetDirDetails(string localDir)
        {
            List<List<string>> infos = new List<List<string>>();
            try
            {
                infos.Add(Directory.GetFiles(localDir).ToList()); //获取当前目录的文件
                infos.Add(Directory.GetDirectories(localDir).ToList()); //获取当前目录的目录
                for (int i = 0; i < infos[0].Count; i++)
                {
                    int index = infos[0][i].LastIndexOf(@"\");
                    infos[0][i] = infos[0][i].Substring(index + 1);
                }
                for (int i = 0; i < infos[1].Count; i++)
                {
                    int index = infos[1][i].LastIndexOf(@"\");
                    infos[1][i] = infos[1][i].Substring(index + 1);
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return infos;
        }
 
        /// <summary>
        /// 新建目录
        /// </summary>
        /// <param name="ftpPath">FTP目录路径 例如：ftp://222.76.208.41/xmjsapproval</param>
        /// <param name="dirName">需创建的文件夹名称</param>
        public  void MakeDir(string ftpPath, string dirName)
        {
            try
            {
                //实例化FTP连接
                FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath +@"/"+ dirName));
                request.Credentials = new NetworkCredential(ftpUser, ftpPassWord); 
                //指定FTP操作类型为创建目录
                request.Method = WebRequestMethods.Ftp.MakeDirectory;
                //获取FTP服务器的响应
                FtpWebResponse response = (FtpWebResponse)request.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        /// <summary>  
        /// 从ftp下载文件到本地服务器  
        /// </summary>  
        /// <param name="downloadUrl">要下载的ftp文件路径，如ftp://192.168.1.104/capture-2.avi</param>  
        /// <param name="saveFileUrl">本地保存文件的路径，如(@"d:\capture-22.avi"</param>  
        public void DownLoadFile(string downloadUrl, string saveFileUrl) 
        { 
            Stream responseStream = null; 
            FileStream fileStream = null; 
            StreamReader reader = null; 
   
            try
            { 
                // string downloadUrl = "ftp://192.168.1.104/capture-2.avi";  
   
                FtpWebRequest downloadRequest = (FtpWebRequest)WebRequest.Create(downloadUrl); 
                downloadRequest.Method = WebRequestMethods.Ftp.DownloadFile; 
                
                //string ftpUser = "yoyo";  
                //string ftpPassWord = "123456";  
                downloadRequest.Credentials = new NetworkCredential(ftpUser, ftpPassWord);
                downloadRequest.UsePassive = false;
                downloadRequest.ReadWriteTimeout = 900000;
                downloadRequest.Timeout = 900000;
                downloadRequest.KeepAlive = true;
                FtpWebResponse downloadResponse = (FtpWebResponse)downloadRequest.GetResponse();
                responseStream = downloadResponse.GetResponseStream(); 
                fileStream = File.Create(saveFileUrl); 
                byte[] buffer = new byte[1024]; 
                int bytesRead; 
                while (true) 
                { 
                    bytesRead = responseStream.Read(buffer, 0, buffer.Length); 
                    if (bytesRead == 0) 
                        break; 
                    fileStream.Write(buffer, 0, bytesRead); 
                } 
            } 
            catch (Exception ex) 
            {
                
                throw new Exception("从ftp服务器下载文件出错，文件名：" + downloadUrl + "异常信息：" + ex.ToString()); 
            } 
            finally
            { 
                if (reader != null) 
                { 
                    reader.Close(); 
                } 
                if (responseStream != null) 
                { 
                    responseStream.Close(); 
                } 
                if (fileStream != null) 
                { 
                    fileStream.Close(); 
                } 
            } 
        } 
   
   
        /// <summary>  
        /// 从FTP下载文件到本地服务器,支持断点下载  
        /// </summary>  
        /// <param name="ftpUri">ftp文件路径，如"ftp://localhost/test.txt"</param>  
        /// <param name="saveFile">保存文件的路径，如C:\\test.txt</param>  
        public void BreakPointDownLoadFile(string ftpUri, string saveFile) 
        { 
            System.IO.FileStream fs = null; 
            System.Net.FtpWebResponse ftpRes = null; 
            System.IO.Stream resStrm = null; 
            try
            { 
                //下载文件的URI  
                Uri u = new Uri(ftpUri); 
                //设定下载文件的保存路径  
                string downFile = saveFile; 
   
                //FtpWebRequest的作成  
                System.Net.FtpWebRequest ftpReq = (System.Net.FtpWebRequest) 
                 System.Net.WebRequest.Create(u); 
                //设定用户名和密码  
                ftpReq.Credentials = new System.Net.NetworkCredential(ftpUser, ftpPassWord); 
                //MethodにWebRequestMethods.Ftp.DownloadFile("RETR")设定  
                ftpReq.Method = System.Net.WebRequestMethods.Ftp.DownloadFile; 
                //要求终了后关闭连接  
                ftpReq.KeepAlive = false; 
                //使用ASCII方式传送  
                ftpReq.UseBinary = false; 
                //设定PASSIVE方式无效  
                ftpReq.UsePassive = false; 
   
                //判断是否继续下载  
                //继续写入下载文件的FileStream  
   
                if (System.IO.File.Exists(downFile)) 
                { 
                    //继续下载  
                    ftpReq.ContentOffset = (new System.IO.FileInfo(downFile)).Length; 
                    fs = new System.IO.FileStream( 
                       downFile, System.IO.FileMode.Append, System.IO.FileAccess.Write); 
                } 
                else
                { 
                    //一般下载  
                    fs = new System.IO.FileStream( 
                        downFile, System.IO.FileMode.Create, System.IO.FileAccess.Write); 
                } 
   
                //取得FtpWebResponse  
                ftpRes = (System.Net.FtpWebResponse)ftpReq.GetResponse(); 
                //为了下载文件取得Stream  
                resStrm = ftpRes.GetResponseStream(); 
                //写入下载的数据  
                byte[] buffer = new byte[1024]; 
                while (true) 
                { 
                    int readSize = resStrm.Read(buffer, 0, buffer.Length); 
                    if (readSize == 0) 
                        break; 
                    fs.Write(buffer, 0, readSize); 
                } 
            } 
            catch (Exception ex) 
            { 
                throw new Exception("从ftp服务器下载文件出错，文件名：" + ftpUri + "异常信息：" + ex.ToString()); 
            } 
            finally
            { 
                fs.Close(); 
                resStrm.Close(); 
                ftpRes.Close(); 
            } 
        }
        /// <summary>
        /// 检查目录是否存在
        /// </summary>
        /// <param name="ftpPath">要检查的目录的上一级目录</param>
        /// <param name="dirName">要检查的目录名</param>
        /// <returns>存在返回true，否则false</returns>
        public  bool CheckDirectoryExist(string ftpPath, string dirName)
        {
            bool result = false;
            try
            {
                List<FileStruct> files = ListFilesAndDirectories(ftpPath);
                foreach (FileStruct f in files)
                {
                    if (f.IsDirectory && f.Name == dirName)
                    {
                        result = true;
                        break;
                    }
 
                }
            }
            catch(Exception ex)
            {
                throw ex; 
            }
                return result;
        }
 
   
        #region 从FTP上下载整个文件夹，包括文件夹下的文件和文件夹  
   
        /// <summary>  
        /// 列出FTP服务器上面当前目录的所有文件和目录  
        /// </summary>  
        /// <param name="ftpUri">FTP目录</param>  
        /// <returns></returns>  
        public List<FileStruct> ListFilesAndDirectories(string ftpUri) 
        { 
            WebResponse webresp = null; 
            StreamReader ftpFileListReader = null; 
            FtpWebRequest ftpRequest = null; 
            try
            { 
                ftpRequest = (FtpWebRequest)WebRequest.Create(new Uri(ftpUri)); 
                ftpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails; 
                ftpRequest.Credentials = new NetworkCredential(ftpUser, ftpPassWord);
                ftpRequest.UsePassive = false;//链接模式
                ftpRequest.Timeout = 900000;
                ftpRequest.ReadWriteTimeout = 900000;
                ftpRequest.KeepAlive = true;
                webresp = ftpRequest.GetResponse(); 
                ftpFileListReader = new StreamReader(webresp.GetResponseStream(),Encoding.Default); 
            } 
            catch (Exception ex) 
            {
                throw ex;
                //throw new Exception("获取文件列表出错，错误信息如下：" + ex.ToString()); 
            } 
            string Datastring = ftpFileListReader.ReadToEnd(); 
            return GetList(Datastring); 
   
        } 
   
        /// <summary>  
        /// 列出FTP目录下的所有文件  
        /// </summary>  
        /// <param name="ftpUri">FTP目录</param>  
        /// <returns></returns>  
        public List<FileStruct> ListFiles(string ftpUri) 
        { 
            List<FileStruct> listAll = ListFilesAndDirectories(ftpUri); 
            List<FileStruct> listFile = new List<FileStruct>(); 
            foreach (FileStruct file in listAll) 
            { 
                if (!file.IsDirectory) 
                { 
                    listFile.Add(file); 
                } 
            } 
            return listFile; 
        } 
   
   
        /// <summary>  
        /// 列出FTP目录下的所有目录  
        /// </summary>  
        /// <param name="ftpUri">FRTP目录</param>  
        /// <returns>目录列表</returns>  
        public List<FileStruct> ListDirectories(string ftpUri) 
        { 
            List<FileStruct> listAll = ListFilesAndDirectories(ftpUri); 
            List<FileStruct> listDirectory = new List<FileStruct>(); 
            foreach (FileStruct file in listAll) 
            { 
                if (file.IsDirectory) 
                { 
                    listDirectory.Add(file); 
                } 
            } 
            return listDirectory; 
        } 
   
        /// <summary>  
        /// 获得文件和目录列表  
        /// </summary>  
        /// <param name="datastring">FTP返回的列表字符信息</param>  
        private List<FileStruct> GetList(string datastring) 
        { 
            List<FileStruct> myListArray = new List<FileStruct>(); 
            string[] dataRecords = datastring.Split('\n'); 
            FileListStyle _directoryListStyle = GuessFileListStyle(dataRecords); 
            foreach (string s in dataRecords)
            {
                if (s.IndexOf("total")!=0)
                {
                    if (_directoryListStyle != FileListStyle.Unknown && s != "")
                    {
                        FileStruct f = new FileStruct();
                        f.Name = "..";
                        switch (_directoryListStyle)
                        {
                            case FileListStyle.UnixStyle:
                                f = ParseFileStructFromUnixStyleRecord(s);
                                break;
                            case FileListStyle.WindowsStyle:
                                f = ParseFileStructFromWindowsStyleRecord(s);
                                break;
                        }
                        if (!(f.Name == "." || f.Name == ".."))
                        {
                            myListArray.Add(f);
                        }
                    }
                }
            } 
            return myListArray; 
        } 
        /// <summary>  
        /// 从Unix@  
        /// </summary>  
        /// <param name="Record">文件信息</param>  
        private FileStruct ParseFileStructFromUnixStyleRecord(string Record) 
        { 
            FileStruct f = new FileStruct(); 
            string processstr = Record.Trim(); 
            f.Flags = processstr.Substring(0, 10); 
            f.IsDirectory = (f.Flags[0] == 'd'); 
            processstr = (processstr.Substring(11)).Trim(); 
            _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //跳过一部分  
            f.Owner = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); 
            f.Group = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); 
            _cutSubstringFromStringWithTrim(ref processstr, ' ', 0);   //跳过一部分  
            string yearOrTime = processstr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)[2]; 
            if (yearOrTime.IndexOf(":") >= 0)  //time  
            { 
                processstr = processstr.Replace(yearOrTime, DateTime.Now.Year.ToString()); 
            } 
            f.CreateTime = DateTime.Parse(_cutSubstringFromStringWithTrim(ref processstr, ' ', 8)); 
            f.Name = processstr;   //最后就是名称  
            return f; 
        } 
   
        /// <summary>  
        /// 从Windows格式中返回文件信息  
        /// </summary>  
        /// <param name="Record">文件信息</param>  
        private FileStruct ParseFileStructFromWindowsStyleRecord(string Record) 
        { 
            FileStruct f = new FileStruct(); 
            string processstr = Record.Trim(); 
            string dateStr = processstr.Substring(0, 8); 
            processstr = (processstr.Substring(8, processstr.Length - 8)).Trim(); 
            string timeStr = processstr.Substring(0, 7); 
            processstr = (processstr.Substring(7, processstr.Length - 7)).Trim(); 
            DateTimeFormatInfo myDTFI = new CultureInfo("en-US", false).DateTimeFormat; 
            myDTFI.ShortTimePattern = "t"; 
            f.CreateTime = DateTime.Parse(dateStr + " " + timeStr, myDTFI); 
            if (processstr.Substring(0, 5) == "<DIR>") 
            { 
                f.IsDirectory = true; 
                processstr = (processstr.Substring(5, processstr.Length - 5)).Trim(); 
            } 
            else
            { 
                string[] strs = processstr.Split(new char[] { ' ' },2);// StringSplitOptions.RemoveEmptyEntries);   // true);  
                processstr = strs[1]; 
                f.IsDirectory = false; 
            } 
            f.Name = processstr; 
            return f; 
        } 
        /// <summary>  
        /// 按照一定的规则进行字符串截取  
        /// </summary>  
        /// <param name="s">截取的字符串</param>  
        /// <param name="c">查找的字符</param>  
        /// <param name="startIndex">查找的位置</param>  
        private string _cutSubstringFromStringWithTrim(ref string s, char c, int startIndex) 
        { 
            int pos1 = s.IndexOf(c, startIndex); 
            string retString = s.Substring(0, pos1); 
            s = (s.Substring(pos1)).Trim(); 
            return retString; 
        } 
        /// <summary>  
        /// 判断文件列表的方式Window方式还是Unix方式  
        /// </summary>  
        /// <param name="recordList">文件信息列表</param>  
        private FileListStyle GuessFileListStyle(string[] recordList) 
        { 
            foreach (string s in recordList) 
            { 
                if (s.Length > 10 
                 && Regex.IsMatch(s.Substring(0, 10), "(-|d)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)")) 
                { 
                    return FileListStyle.UnixStyle; 
                } 
                else if (s.Length > 8 
                 && Regex.IsMatch(s.Substring(0, 8), "[0-9][0-9]-[0-9][0-9]-[0-9][0-9]")) 
                { 
                    return FileListStyle.WindowsStyle;
                }
            }
            return FileListStyle.Unknown; 
        } 
   
        /// <summary>    
        /// 从FTP下载整个文件夹    
        /// </summary>    
        /// <param name="ftpDir">FTP文件夹路径</param>    
        /// <param name="saveDir">保存的本地文件夹路径</param>    
        public void DownFtpDir(string ftpDir, string saveDir) 
        {
            try
            {
                List<FileStruct> files = ListFilesAndDirectories(ftpDir);
                if (!Directory.Exists(saveDir))
                {
                    Directory.CreateDirectory(saveDir);
                }
                foreach (FileStruct f in files)
                {
                    if (f.IsDirectory) //文件夹，递归查询  
                    {
                        DownFtpDir(ftpDir + "/" + f.Name, saveDir + "\\" + f.Name);
                    }
                    else //文件，直接下载  
                    {
                        BreakPointDownLoadFile(ftpDir + "/" + f.Name, saveDir + "\\" + f.Name);
                        //DownLoadFile(ftpDir + "/" + f.Name, saveDir + "\\" + f.Name); 
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        } 
   
        #endregion  
    }
}
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