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ftp文件上传和下载

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Net;
  6 using System.Threading;
  7 using System.IO;
  8 
  9 namespace FtpHelper
 10 {
 11     public delegate void DownloadCompleteHandler();
 12     public delegate void DownloadProgressHandler(int bytesRead, int totalBytes);
 13     /// <summary>
 14     /// ftp下载类
 15     /// </summary>
 16     public class FtpDownload
 17     {
 18         public DownloadCompleteHandler CompleteCallback;
 19         public DownloadProgressHandler ProgressCallback;
 20         private FtpWebRequest reqFTP = null;
 21         private FtpWebResponse resFTP = null;
 22         private Thread mThread = null;
 23         //下载文件到本地的存储路径
 24         private string sFileName = string.Empty;
 25 
 26         public string DlFileName
 27         {
 28             get { return sFileName; }
 29             set { sFileName = value; }
 30         }
 31         private FileStream outputStream = null;
 32         private Stream ftpStream = null;
 33         public bool IsComplete = false;
 34         //用于终止下载
 35         private bool stopFlag = false;
 36         //从Ftp下载的文件路径，示例："ftp://192.168.2.200/Project/asss.xls"
 37         private string sFtpUrl = string.Empty;
 38         private string sFtpUser = string.Empty;
 39         private string sFtpPassword = string.Empty;
 40         public int BytesProcessed;
 41 
 42         public FtpDownload(string sUrlPath, string ftpUser, string ftpPassword)
 43         {
 44             sFtpUrl = sUrlPath;
 45             sFtpUser = ftpUser;
 46             sFtpPassword = ftpPassword;
 47 
 48         }
 49         /// <summary>
 50         /// 后台下载
 51         /// </summary>
 52         public void DownloadBackgroundFile()
 53         {
 54             if (CompleteCallback == null)
 55                 throw new ArgumentException("No download complete callback specified.");
 56             //实例化下载线程
 57             mThread = new Thread(new ThreadStart(Download));
 58             mThread.Name = "WebDownload.dlThread";
 59             mThread.IsBackground = true;
 60             mThread.CurrentUICulture = Thread.CurrentThread.CurrentUICulture;
 61             //开启后台下载线程
 62             mThread.Start();
 63         }
 64         protected void Download()
 65         {
 66             try
 67             {
 68                 if (stopFlag)
 69                 {
 70                     IsComplete = true;
 71                     return;
 72                 }
 73                 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(sFtpUrl));
 74                 reqFTP.UseBinary = true;
 75                 reqFTP.Proxy = null;
 76                 reqFTP.UsePassive = false;
 77                 reqFTP.Credentials = new NetworkCredential(sFtpUser, sFtpPassword);
 78                 if (stopFlag)
 79                 {
 80                     IsComplete = true;
 81                     return;
 82                 }
 83                 resFTP = (FtpWebResponse)reqFTP.GetResponse();
 84                 ftpStream = resFTP.GetResponseStream();
 85                 long ContentLength = resFTP.ContentLength;
 86                 int bufferSize = 2048;
 87                 byte[] readBuffer = new byte[bufferSize];
 88                 outputStream = new FileStream(sFileName, FileMode.Create);
 89                 while (true)
 90                 {
 91                     if (stopFlag)
 92                     {
 93                         IsComplete = true;
 94                         return;
 95                     }
 96                     //  Pass do.readBuffer to BeginRead.
 97                     int bytesRead = ftpStream.Read(readBuffer, 0, bufferSize);
 98                     if (bytesRead <= 0)
 99                         break;
100                     outputStream.Write(readBuffer, 0, bytesRead);
101                     BytesProcessed += bytesRead;
102                     OnProgressCallback(BytesProcessed, (int)ContentLength);
103                 }
104 
105                 OnCompleteCallback();
106             }
107             catch (Exception ex)
108             {
109                 try
110                 {
111                     // Remove broken file download
112                     if (outputStream != null)
113                     {
114                         outputStream.Close();
115                         outputStream = null;
116                     }
117                     if (sFileName != null && sFileName.Length > 0)
118                     {
119                         File.Delete(sFileName);
120                     }
121                 }
122                 catch (Exception)
123                 {
124                 }
125                 Logger.Log.Write(ex.Message);
126             }
127             finally
128             {
129                 if (resFTP != null)
130                 {
131                     resFTP.Close();
132                     resFTP = null;
133                 }
134                 if (ftpStream != null)
135                 {
136                     ftpStream.Close();
137                     ftpStream.Dispose();
138                 }
139                 if (outputStream != null)
140                 {
141                     outputStream.Close();
142                     outputStream.Dispose();
143                 }
144                 IsComplete = true;
145             }
146 
147         }
148 
149         private void OnProgressCallback(int bytesRead, int totalBytes)
150         {
151             if (ProgressCallback != null)
152             {
153                 ProgressCallback(bytesRead, totalBytes);
154             }
155         }
156         private void OnCompleteCallback()
157         {
158             if (CompleteCallback != null)
159             {
160                 CompleteCallback();
161             }
162         }
163         /// 终止当前下载
164         /// </summary>
165         public void Cancel()
166         {
167             CompleteCallback = null;
168             ProgressCallback = null;
169             if (mThread != null && mThread != Thread.CurrentThread)
170             {
171                 if (mThread.IsAlive)
172                 {
173                     // Log.Write(Log.Levels.Verbose, "WebDownload.Cancel() : stopping download thread...");
174                     stopFlag = true;
175                     if (!mThread.Join(500))
176                     {
177                         //Log.Write(Log.Levels.Warning, "WebDownload.Cancel() : download thread refuses to die, forcing Abort()");
178                         mThread.Abort();
179                     }
180                 }
181                 mThread = null;
182             }
183         }
184 
185         public void Dispose()
186         {
187             if (mThread != null && mThread != Thread.CurrentThread)
188             {
189                 if (mThread.IsAlive)
190                 {
191                     // Log.Write(Log.Levels.Verbose, "WebDownload.Dispose() : stopping download thread...");
192                     stopFlag = true;
193                     if (!mThread.Join(500))
194                     {
195                         // Log.Write(Log.Levels.Warning, "WebDownload.Dispose() : download thread refuses to die, forcing Abort()");
196                         mThread.Abort();
197                     }
198                 }
199                 mThread = null;
200             }
201 
202             if (reqFTP != null)
203             {
204                 reqFTP.Abort();
205                 reqFTP = null;
206             }
207 
208             if (outputStream != null)
209             {
210                 outputStream.Close();
211                 outputStream = null;
212             }
213 
214             //if (DownloadStartTime != DateTime.MinValue)
215             //    OnDebugCallback(this);
216 
217             GC.SuppressFinalize(this);
218         }
219     }
220 }

View Code

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Net;
  6 using System.Threading;
  7 using System.IO;
  8 
  9 namespace FtpHelper
 10 {
 11     public delegate void UploadCompleteHandler();
 12     public delegate void UploadProgressHandler(int bytesRead, int totalBytes);
 13     public class FtpUpload
 14     {
 15         public UploadCompleteHandler CompleteCallback;
 16         public UploadProgressHandler ProgressCallback;
 17         private FtpWebRequest reqFTP;
 18         private FtpWebResponse resFTP;
 19         private Thread mThread = null;
 20         //本地文件路径
 21         private string sFileName = string.Empty;
 22 
 23         public string UlFileName
 24         {
 25             get { return sFileName; }
 26             set { sFileName = value; }
 27         }
 28         private Stream uploadStream = null;
 29         public bool IsComplete = false;
 30         //用于终止上传
 31         private bool stopFlag = false;
 32         //上传到Ftp路径，示例："ftp://192.168.2.200/Project/asss.xls"
 33         private string sFtpUrl = string.Empty;
 34         private string sFtpUser = string.Empty;
 35         private string sFtpPassword = string.Empty;
 36         private int BytesProcessed;
 37         public FtpUpload(string sUrlPath, string ftpUser, string ftpPassword)
 38         {
 39             sFtpUrl = sUrlPath;
 40             sFtpUser = ftpUser;
 41             sFtpPassword = ftpPassword;
 42         }
 43 
 44         /// <summary>
 45         /// 后台上传
 46         /// </summary>
 47         public void UploadBackgroundFile()
 48         {
 49             if (CompleteCallback == null)
 50                 throw new ArgumentException("未定义上传成功后执行的回调函数！");
 51             //实例化下载线程
 52             mThread = new Thread(new ThreadStart(Upload));
 53             mThread.Name = "upload";
 54             mThread.IsBackground = true;
 55             mThread.CurrentUICulture = Thread.CurrentThread.CurrentUICulture;
 56             //开启后台下载线程
 57             mThread.Start();
 58         }
 59         protected void Upload()
 60         {
 61             using (FileStream fileStream = new FileStream(sFileName, FileMode.Open))
 62             {
 63                 byte[] fsdata = new byte[Convert.ToInt32(fileStream.Length)];
 64                 fileStream.Read(fsdata, 0, Convert.ToInt32(fileStream.Length));
 65                 try
 66                 {
 67                     if (stopFlag)
 68                     {
 69                         IsComplete = true;
 70                         return;
 71                     }
 72                     reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(sFtpUrl));
 73                     reqFTP.UseBinary = true;
 74                     reqFTP.Proxy = null;
 75                     reqFTP.UsePassive = false;
 76                     reqFTP.Credentials = new NetworkCredential(sFtpUser, sFtpPassword);
 77                     if (stopFlag)
 78                     {
 79                         IsComplete = true;
 80                         return;
 81                     }
 82 
 83                     reqFTP.KeepAlive = false;
 84                     reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
 85                     reqFTP.ContentLength = fileStream.Length;
 86 
 87                     int buffLength = 2048;
 88                     byte[] buffer = new byte[buffLength];
 89 
 90                     uploadStream = reqFTP.GetRequestStream();
 91                     fileStream.Position = 0;
 92                     while (true)
 93                     {
 94                         if (stopFlag)
 95                         {
 96                             IsComplete = true;
 97                             return;
 98                         }
 99                         int bytesRead = fileStream.Read(buffer, 0, buffLength);
100                         if (bytesRead <= 0)
101                             break;
102                         uploadStream.Write(buffer, 0, bytesRead);
103 
104                         BytesProcessed += bytesRead;
105                         OnProgressCallback(BytesProcessed, (int)reqFTP.ContentLength);
106                     }               
107                     OnCompleteCallback();
108                 }
109                 catch (Exception ex)
110                 {
111                     if (fileStream != null)
112                     {
113                         fileStream.Close();
114                         //fileStream = null;
115                     }
116                     Logger.Log.Write(ex.Message);
117                     //throw;
118                 }
119                 finally
120                 {
121                     if (uploadStream != null)
122                     {
123                         uploadStream.Close();
124                         uploadStream.Dispose();
125                     }
126                     reqFTP = null;
127                     IsComplete = true;
128                 }
129             }
130         }
131         private void OnProgressCallback(int bytesRead, int totalBytes)
132         {
133             if (ProgressCallback != null)
134             {
135                 ProgressCallback(bytesRead, totalBytes);
136             }
137         }
138         private void OnCompleteCallback()
139         {
140             if (CompleteCallback != null)
141             {
142                 CompleteCallback();
143             }
144         }
145         /// 终止当前下载
146         /// </summary>
147         public void Cancel()
148         {
149             CompleteCallback = null;
150             ProgressCallback = null;
151             if (mThread != null && mThread != Thread.CurrentThread)
152             {
153                 if (mThread.IsAlive)
154                 {
155                     // Log.Write(Log.Levels.Verbose, "WebDownload.Cancel() : stopping download thread...");
156                     stopFlag = true;
157                     if (!mThread.Join(500))
158                     {
159                         //Log.Write(Log.Levels.Warning, "WebDownload.Cancel() : download thread refuses to die, forcing Abort()");
160                         mThread.Abort();
161                     }
162                 }
163                 mThread = null;
164             }
165         }
166 
167         public void Dispose()
168         {
169             if (mThread != null && mThread != Thread.CurrentThread)
170             {
171                 if (mThread.IsAlive)
172                 {
173                     // Log.Write(Log.Levels.Verbose, "WebDownload.Dispose() : stopping download thread...");
174                     stopFlag = true;
175                     if (!mThread.Join(500))
176                     {
177                          //Log.Write(Log.Levels.Warning, "WebDownload.Dispose() : download thread refuses to die, forcing Abort()");
178                         mThread.Abort();
179                     }
180                 }
181                 mThread = null;
182             }
183 
184             if (reqFTP != null)
185             {
186                 reqFTP.Abort();
187                 reqFTP = null;
188             }
189 
190             //if (DownloadStartTime != DateTime.MinValue)
191             //    OnDebugCallback(this);
192             GC.SuppressFinalize(this);
193         }
194 
195     }
196 }

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原文地址：https://www.cnblogs.com/yhlx125/p/3337383.html