前言
文件传输协议（File Transfer Protocol，FTP）是用于在网络上进行文件传输的一套标准协议，它工作在 OSI 模型的第七层， TCP 模型的第四层， 即应用层， 使用 TCP 传输而不是 UDP， 客户在和服务器建立连接前要经过一个“三次握手”的过程， 保证客户与服务器之间的连接是可靠的， 而且是面向连接， 为数据传输提供可靠保证。
FTP允许用户以文件操作的方式（如文件的增、删、改、查、传送等）与另一主机相互通信。然而， 用户并不真正登录到自己想要存取的计算机上面而成为完全用户， 可用FTP程序访问远程资源， 实现用户往返传输文件、目录管理以及访问电子邮件等等， 即使双方计算机可能配有不同的操作系统和文件存储方式。
一、FTP的花样操作
1.配置文件
public class FTPConfig { /// <summary> /// /// </summary> public FTPConfig() { IsUpload = false; FtpServerIP = "127.0.0.1"; FtpRemotePath = ""; FtpUserID = "ftpTest"; FtpPassword = "a123456."; } /// <summary> /// 是否上传 /// </summary> public bool IsUpload { get; set; } /// <summary> /// FTP的IP地址 /// </summary> public string FtpServerIP { get; set; } /// <summary> /// 上传FTP目录 /// </summary> public string FtpRemotePath { get; set; } /// <summary> /// 用户名 /// </summary> public string FtpUserID { get; set; } /// <summary> /// 密码 /// </summary> public string FtpPassword { get; set; } }
2.FTP的操作封装类
public class FTPHelp { private string ftpURI; private FTPConfig ftpConfig { get; set; } /// <summary> /// 连接FTP /// </summary> /// <param name="ftpConfig"></param> public FTPHelp(FTPConfig ftpConfig) { this.ftpConfig = ftpConfig; if (string.IsNullOrEmpty(this.ftpConfig.FtpRemotePath)) { ftpURI = "ftp://" + this.ftpConfig.FtpServerIP + "/"; } else { ftpURI = "ftp://" + this.ftpConfig.FtpServerIP + "/" + this.ftpConfig.FtpRemotePath + "/"; } } /// <summary> /// 上传 /// </summary> /// <param name="filename"></param> public void Upload(string filename) { if (ftpConfig.IsUpload) { FileInfo fileInfo = new FileInfo(filename); string uri = ftpURI + fileInfo.Name; FtpWebRequest reqFTP; reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); reqFTP.KeepAlive = false; reqFTP.Method = WebRequestMethods.Ftp.UploadFile; reqFTP.UseBinary = true; reqFTP.ContentLength = fileInfo.Length; int buffLength = 2048; byte[] buff = new byte[buffLength]; int contentLen; using (FileStream fs = fileInfo.OpenRead()) { using (Stream strm = reqFTP.GetRequestStream()) { try { contentLen = fs.Read(buff, 0, buffLength); while (contentLen != 0) { strm.Write(buff, 0, contentLen); contentLen = fs.Read(buff, 0, buffLength); } strm.Close(); fs.Close(); } catch (Exception ex) { string errorMessage = "Upload Error --> " + ex.Message; //logger.Error(errorMessage); throw; } } } } else { //logger.Debug("[UploadData] uploadConfig.IsUpload is false,abort to loaddata"); } } /// <summary> /// 下载 /// </summary> /// <param name="filePath"></param> /// <param name="fileName"></param> public void Download(string filePath, string fileName) { FtpWebRequest reqFTP; try { FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create); reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName)); reqFTP.Method = WebRequestMethods.Ftp.DownloadFile; reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); long cl = response.ContentLength; int bufferSize = 2048; int readCount; byte[] buffer = new byte[bufferSize]; readCount = ftpStream.Read(buffer, 0, bufferSize); while (readCount > 0) { outputStream.Write(buffer, 0, readCount); readCount = ftpStream.Read(buffer, 0, bufferSize); } ftpStream.Close(); outputStream.Close(); response.Close(); } catch (Exception ex) { string errorMessage = "Download Error --> " + ex.Message; //logger.Error(errorMessage); throw; } } /// <summary> /// 删除文件 /// </summary> /// <param name="fileName"></param> public void Delete(string fileName) { try { string uri = ftpURI + fileName; FtpWebRequest reqFTP; reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); reqFTP.KeepAlive = false; reqFTP.Method = WebRequestMethods.Ftp.DeleteFile; string result = String.Empty; FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); long size = response.ContentLength; Stream datastream = response.GetResponseStream(); StreamReader sr = new StreamReader(datastream); result = sr.ReadToEnd(); sr.Close(); datastream.Close(); response.Close(); } catch (Exception ex) { string errorMessage = "Delete Error --> " + ex.Message + " 文件名:" + fileName; //logger.Error(errorMessage); throw; } } /// <summary> /// 删除文件夹 /// </summary> /// <param name="folderName"></param> public void RemoveDirectory(string folderName) { try { string uri = ftpURI + folderName; FtpWebRequest reqFTP; reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); reqFTP.KeepAlive = false; reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory; string result = String.Empty; FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); long size = response.ContentLength; Stream datastream = response.GetResponseStream(); StreamReader sr = new StreamReader(datastream); result = sr.ReadToEnd(); sr.Close(); datastream.Close(); response.Close(); } catch (Exception ex) { string errorMessage = "Delete Error --> " + ex.Message + " 文件名:" + folderName; //logger.Error(errorMessage); throw; } } /// <summary> /// 获取当前目录下明细(包含文件和文件夹) /// </summary> /// <returns></returns> public string[] GetFilesDetailList() { string[] downloadFiles; try { StringBuilder result = new StringBuilder(); FtpWebRequest ftp; ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); ftp.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails; WebResponse response = ftp.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default); string line = reader.ReadLine(); while (line != null) { result.Append(line); result.Append("\n"); line = reader.ReadLine(); } result.Remove(result.ToString().LastIndexOf("\n"), 1); reader.Close(); response.Close(); return result.ToString().Split('\n'); } catch (Exception ex) { downloadFiles = null; //logger.Error(ex); return downloadFiles; } } /// <summary> /// 获取当前目录下文件列表(仅文件) /// </summary> /// <returns></returns> public string[] GetFileList(string mask) { string[] downloadFiles; StringBuilder result = new StringBuilder(); FtpWebRequest reqFTP; try { reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); reqFTP.Method = WebRequestMethods.Ftp.ListDirectory; WebResponse response = reqFTP.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default); string line = reader.ReadLine(); while (line != null) { if (mask.Trim() != string.Empty && mask.Trim() != "*.*") { string mask_ = mask.Substring(0, mask.IndexOf("*")); if (line.Substring(0, mask_.Length) == mask_) { result.Append(line); result.Append("\n"); } } else { result.Append(line); result.Append("\n"); } line = reader.ReadLine(); } result.Remove(result.ToString().LastIndexOf('\n'), 1); reader.Close(); response.Close(); return result.ToString().Split('\n'); } catch (Exception ex) { downloadFiles = null; if (ex.Message.Trim() != "远程服务器返回错误: (550) 文件不可用(例如，未找到文件，无法访问文件)。") { string errorMessage = "GetFileList Error --> " + ex.Message.ToString(); //logger.Error(errorMessage); } return downloadFiles; } } /// <summary> /// 获取当前目录下所有的文件夹列表(仅文件夹) /// </summary> /// <returns></returns> public string[] GetDirectoryList() { string[] drectory = GetFilesDetailList(); string m = string.Empty; foreach (string str in drectory) { int dirPos = str.IndexOf("<DIR>"); if (dirPos > 0) { /*判断 Windows 风格*/ m += str.Substring(dirPos + 5).Trim() + "\n"; } else if (str.Trim().Substring(0, 1).ToUpper() == "D") { /*判断 Unix 风格*/ string dir = str.Substring(49).Trim(); if (dir != "." && dir != "..") { m += dir + "\n"; } } } char[] n = new char[] { '\n' }; return m.Split(n); } /// <summary> /// 判断当前目录下指定的子目录是否存在 /// </summary> /// <param name="RemoteDirectoryName">指定的目录名</param> public bool DirectoryExist(string RemoteDirectoryName) { string[] dirList = GetDirectoryList(); foreach (string str in dirList) { if (str.Trim() == RemoteDirectoryName.Trim()) { return true; } } return false; } /// <summary> /// 判断当前目录下指定的文件是否存在 /// </summary> /// <param name="RemoteFileName">远程文件名</param> public bool FileExist(string RemoteFileName) { string[] fileList = GetFileList("*.*"); foreach (string str in fileList) { if (str.Trim() == RemoteFileName.Trim()) { return true; } } return false; } /// <summary> /// 创建文件夹 /// </summary> /// <param name="dirName"></param> public void MakeDir() { if (!string.IsNullOrEmpty(ftpConfig.FtpRemotePath)) { FtpWebRequest reqFTP; try { // dirName = name of the directory to create. reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI)); reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory; reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); ftpStream.Close(); response.Close(); } catch (Exception ex) { string errorMesasge = "MakeDir Error --> " + ex.Message; //logger.Error(errorMesasge); throw; } } } /// <summary> /// 获取指定文件大小 /// </summary> /// <param name="filename"></param> /// <returns></returns> public long GetFileSize(string filename) { FtpWebRequest reqFTP; long fileSize = 0; try { reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename)); reqFTP.Method = WebRequestMethods.Ftp.GetFileSize; reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); fileSize = response.ContentLength; ftpStream.Close(); response.Close(); } catch (Exception ex) { string errorMesasge = "GetFileSize Error --> " + ex.Message; //logger.Error(errorMesasge); throw; } return fileSize; } /// <summary> /// 改名 /// </summary> /// <param name="currentFilename"></param> /// <param name="newFilename"></param> public void ReName(string currentFilename, string newFilename) { FtpWebRequest reqFTP; try { reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + currentFilename)); reqFTP.Method = WebRequestMethods.Ftp.Rename; reqFTP.RenameTo = newFilename; reqFTP.UseBinary = true; reqFTP.Credentials = new NetworkCredential(ftpConfig.FtpUserID, ftpConfig.FtpPassword); FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); ftpStream.Close(); response.Close(); } catch (Exception ex) { string errorMesasge = "ReName Error --> " + ex.Message; //logger.Error(errorMesasge); throw; } } /// <summary> /// 移动文件 /// </summary> /// <param name="currentFilename"></param> /// <param name="newDirectory"></param> public void MovieFile(string currentFilename, string newDirectory) { ReName(currentFilename, newDirectory); } /// <summary> /// 切换当前目录 /// </summary> /// <param name="DirectoryName"></param> /// <param name="IsRoot">true 绝对路径 false 相对路径</param> public void GotoDirectory(string DirectoryName, bool IsRoot) { if (IsRoot) { ftpConfig.FtpRemotePath = DirectoryName; } else { ftpConfig.FtpRemotePath += DirectoryName + "/"; } ftpURI = "ftp://" + ftpConfig.FtpServerIP + "/" + ftpConfig.FtpRemotePath + "/"; } /// <summary> /// 删除订单目录 /// </summary> /// <param name="ftpConfig"></param> /// <param name="folderToDelete"></param> public static void DeleteOrderDirectory(FTPConfig ftpConfig, string folderToDelete) { try { if (!string.IsNullOrEmpty(ftpConfig.FtpServerIP) && !string.IsNullOrEmpty(folderToDelete) && !string.IsNullOrEmpty(ftpConfig.FtpUserID) && !string.IsNullOrEmpty(ftpConfig.FtpPassword)) { FTPTestViewModel fw = new FTPTestViewModel(ftpConfig); //进入订单目录 fw.GotoDirectory(folderToDelete, true); //获取规格目录 string[] folders = fw.GetDirectoryList(); foreach (string folder in folders) { if (!string.IsNullOrEmpty(folder) || folder != "") { //进入订单目录 string subFolder = folderToDelete + "/" + folder; fw.GotoDirectory(subFolder, true); //获取文件列表 string[] files = fw.GetFileList("*.*"); if (files != null) { //删除文件 foreach (string file in files) { fw.Delete(file); } } //删除冲印规格文件夹 fw.GotoDirectory(folderToDelete, true); fw.RemoveDirectory(folder); } } //删除订单文件夹 string parentFolder = folderToDelete.Remove(folderToDelete.LastIndexOf('/')); string orderFolder = folderToDelete.Substring(folderToDelete.LastIndexOf('/') + 1); fw.GotoDirectory(parentFolder, true); fw.RemoveDirectory(orderFolder); } else { throw new Exception("FTP 及路径不能为空！"); } } catch (Exception ex) { throw new Exception("删除订单时发生错误，错误信息为：" + ex.Message); } } }
3.使用
public void Upload() { ftpConfig.IsUpload = true; Upload(@"D:\temp.png"); MessageBox.Show("上传完成!!!"); } public void Download() { Download(@"D:\", "temp.png"); MessageBox.Show("下载完成!!!"); } public void Delete() { Delete("temp.png"); MessageBox.Show("删除完成!!!"); }
