c#上传下载ftp(支持断点续传)
这个ftpClient是从网上找来的，自己加了断点续传的方法
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
namespace ftpGet
{
/// <summary>
/// FTP Client
/// </summary>
public class FTPClient
{
#region 构造函数
/// <summary>
/// 缺省构造函数
/// </summary>
public FTPClient()
{
strRemoteHost = "" ;
strRemotePath = "" ;
strRemoteUser = "" ;
strRemotePass = "" ;
strRemotePort = 21 ;
bConnected = false ;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="remoteHost"> FTP服务器IP地址 </param>
/// <param name="remotePath"> 当前服务器目录 </param>
/// <param name="remoteUser"> 登录用户账号 </param>
/// <param name="remotePass"> 登录用户密码 </param>
/// <param name="remotePort"> FTP服务器端口 </param>
public FTPClient( string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort)
{
strRemoteHost = remoteHost;
strRemotePath = remotePath;
strRemoteUser = remoteUser;
strRemotePass = remotePass;
strRemotePort = remotePort;
Connect();
}
#endregion
#region 登陆字段、属性
/// <summary>
/// FTP服务器IP地址
/// </summary>
private string strRemoteHost;
public string RemoteHost
{
get
{
return strRemoteHost;
}
set
{
strRemoteHost = value;
}
}
/// <summary>
/// FTP服务器端口
/// </summary>
private int strRemotePort;
public int RemotePort
{
get
{
return strRemotePort;
}
set
{
strRemotePort = value;
}
}
/// <summary>
/// 当前服务器目录
/// </summary>
private string strRemotePath;
public string RemotePath
{
get
{
return strRemotePath;
}
set
{
strRemotePath = value;
}
}
/// <summary>
/// 登录用户账号
/// </summary>
private string strRemoteUser;
public string RemoteUser
{
set
{
strRemoteUser = value;
}
}
/// <summary>
/// 用户登录密码
/// </summary>
private string strRemotePass;
public string RemotePass
{
set
{
strRemotePass = value;
}
}
/// <summary>
/// 是否登录
/// </summary>
private Boolean bConnected;
public bool Connected
{
get
{
return bConnected;
}
}
#endregion
#region 链接
/// <summary>
/// 建立连接
/// </summary>
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 ;
// 切换到初始目录
if (! string .IsNullOrEmpty(strRemotePath))
{
ChDir(strRemotePath);
}
}
/// <summary>
/// 关闭连接
/// </summary>
public void DisConnect()
{
if (socketControl != null )
{
SendCommand( " QUIT " );
}
CloseSocketConnect();
}
#endregion
#region 传输模式
/// <summary>
/// 传输模式:二进制类型、ASCII类型
/// </summary>
public enum TransferType
{
Binary,
ASCII
} ;
/// <summary>
/// 设置传输模式
/// </summary>
/// <param name="ttType"> 传输模式 </param>
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;
}
}
/// <summary>
/// 获得传输模式
/// </summary>
/// <returns> 传输模式 </returns>
public TransferType GetTransferType()
{
return trType;
}
#endregion
#region 文件操作
/// <summary>
/// 获得文件列表
/// </summary>
/// <param name="strMask"> 文件名的匹配字符串 </param>
/// <returns></returns>
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( " LIST " + 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 += GB2312.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;
}
/// <summary>
/// 获取文件大小
/// </summary>
/// <param name="strFileName"> 文件名 </param>
/// <returns> 文件大小 </returns>
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;
}
/// <summary>
/// 删除
/// </summary>
/// <param name="strFileName"> 待删除文件名 </param>
public void Delete( string strFileName)
{
if (!bConnected)
{
Connect();
}
SendCommand( " DELE " + strFileName);
if (iReplyCode != 250 )
{
throw new IOException(strReply.Substring( 4 ));
}
}
/// <summary>
/// 重命名(如果新文件名与已有文件重名,将覆盖已有文件)
/// </summary>
/// <param name="strOldFileName"> 旧文件名 </param>
/// <param name="strNewFileName"> 新文件名 </param>
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
/// <summary>
/// 下载一批文件
/// </summary>
/// <param name="strFileNameMask"> 文件名的匹配字符串 </param>
/// <param name="strFolder"> 本地目录(不得以\结束) </param>
public void Get( string strFileNameMask, string strFolder)
{
if (!bConnected)
{
Connect();
}
string [] strFiles = Dir(strFileNameMask);
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.LastIndexOf( " . " ) > - 1 )
{
Get(strFile.Replace( " \r " , "" ), strFolder, strFile.Replace( " \r " , "" ));
}
}
}
}
/// <summary>
/// 下载目录
/// </summary>
/// <param name="strRemoteFileName"> 要下载的文件名 </param>
/// <param name="strFolder"> 本地目录(不得以\结束) </param>
/// <param name="strLocalFileName"> 保存在本地时的文件名 </param>
public void Get( string strRemoteFileName, string strFolder, string strLocalFileName)
{
if (strLocalFileName.StartsWith( " -r " ))
{
string [] infos = strLocalFileName.Split( ' ' );
strRemoteFileName=strLocalFileName = infos[infos.Length - 1 ];
if (!bConnected)
{
Connect();
}
SetTransferType(TransferType.Binary);
if (strLocalFileName.Equals( "" ))
{
strLocalFileName = strRemoteFileName;
}
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 ));
}
}
}
}
/// <summary>
/// 下载一个文件
/// </summary>
/// <param name="strRemoteFileName"> 要下载的文件名 </param>
/// <param name="strFolder"> 本地目录(不得以\结束) </param>
/// <param name="strLocalFileName"> 保存在本地时的文件名 </param>
public void GetFile( string strRemoteFileName, string strFolder, string strLocalFileName)
{
if (!bConnected)
{
Connect();
}
SetTransferType(TransferType.Binary);
if (strLocalFileName.Equals( "" ))
{
strLocalFileName = strRemoteFileName;
}
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 ));
}
}
}
/// <summary>
/// 下载一个文件
/// </summary>
/// <param name="strRemoteFileName"> 要下载的文件名 </param>
/// <param name="strFolder"> 本地目录(不得以\结束) </param>
/// <param name="strLocalFileName"> 保存在本地时的文件名 </param>
public void GetBrokenFile( string strRemoteFileName, string strFolder, string strLocalFileName, long size)
{
if (!bConnected)
{
Connect();
}
SetTransferType(TransferType.Binary);
FileStream output = new
FileStream(strFolder + " \\ " + strLocalFileName, FileMode.Append);
Socket socketData = CreateDataSocket();
SendCommand( " REST " + size.ToString());
SendCommand( " RETR " + strRemoteFileName);
if (!(iReplyCode == 150 || iReplyCode == 125
|| iReplyCode == 226 || iReplyCode == 250 ))
{
throw new IOException(strReply.Substring( 4 ));
}
// int byteYu = (int)size % 512;
// int byteChu = (int)size / 512;
// byte[] tempBuffer = new byte[byteYu];
// for (int i = 0; i < byteChu; i++)
// {
// socketData.Receive(buffer, buffer.Length, 0);
// }
// socketData.Receive(tempBuffer, tempBuffer.Length, 0);
// socketData.Receive(buffer, byteYu, 0);
while ( true )
{
int iBytes = socketData.Receive(buffer, buffer.Length, 0 );
// totalBytes += iBytes;
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 ));
}
}
}
/// <summary>
/// 上传一批文件
/// </summary>
/// <param name="strFolder"> 本地目录(不得以\结束) </param>
/// <param name="strFileNameMask"> 文件名匹配字符(可以包含*和?) </param>
public void Put( string strFolder, string strFileNameMask)
{
string [] strFiles = Directory.GetFiles(strFolder, strFileNameMask);
foreach ( string strFile in strFiles)
{
// strFile是完整的文件名(包含路径)
Put(strFile);
}
}
/// <summary>
/// 上传一个文件
/// </summary>
/// <param name="strFileName"> 本地文件名 </param>
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
/// <summary>
/// 创建目录
/// </summary>
/// <param name="strDirName"> 目录名 </param>
public void MkDir( string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand( " MKD " + strDirName);
if (iReplyCode != 257 )
{
throw new IOException(strReply.Substring( 4 ));
}
}
/// <summary>
/// 删除目录
/// </summary>
/// <param name="strDirName"> 目录名 </param>
public void RmDir( string strDirName)
{
if (!bConnected)
{
Connect();
}
SendCommand( " RMD " + strDirName);
if (iReplyCode != 250 )
{
throw new IOException(strReply.Substring( 4 ));
}
}
/// <summary>
/// 改变目录
/// </summary>
/// <param name="strDirName"> 新的工作目录名 </param>
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
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strMsg;
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strReply;
/// <summary>
/// 服务器返回的应答码
/// </summary>
private int iReplyCode;
/// <summary>
/// 进行控制连接的socket
/// </summary>
private Socket socketControl;
/// <summary>
/// 传输模式
/// </summary>
private TransferType trType;
/// <summary>
/// 接收和发送数据的缓冲区
/// </summary>
private static int BLOCK_SIZE = 512 ;
Byte[] buffer = new Byte[BLOCK_SIZE];
/// <summary>
/// 编码方式(为防止出现中文乱码采用 GB2312编码方式)
/// </summary>
Encoding GB2312 = Encoding.GetEncoding( " gb2312 " );
#endregion
#region 内部函数
/// <summary>
/// 将一行应答字符串记录在strReply和strMsg
/// 应答码记录在iReplyCode
/// </summary>
private void ReadReply()
{
strMsg = "" ;
strReply = ReadLine();
iReplyCode = Int32.Parse(strReply.Substring( 0 , 3 ));
}
/// <summary>
/// 建立进行数据连接的socket
/// </summary>
/// <returns> 数据连接socket </returns>
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;
}
/// <summary>
/// 关闭socket连接(用于登录以前)
/// </summary>
private void CloseSocketConnect()
{
if (socketControl != null )
{
socketControl.Close();
socketControl = null ;
}
bConnected = false ;
}
/// <summary>
/// 读取Socket返回的所有字符串
/// </summary>
/// <returns> 包含应答码的字符串行 </returns>
private string ReadLine()
{
while ( true )
{
int iBytes = socketControl.Receive(buffer, buffer.Length, 0 );
strMsg += GB2312.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;
}
/// <summary>
/// 发送命令并获取应答码和最后一行应答字符串
/// </summary>
/// <param name="strCommand"> 命令 </param>
private void SendCommand(String strCommand)
{
Byte[] cmdBytes =
GB2312.GetBytes((strCommand + " \r\n " ).ToCharArray());
socketControl.Send(cmdBytes, cmdBytes.Length, 0 );
ReadReply();
}
#endregion
}
}
当然，大家还要看看Main方法
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ftpGet
{
class Program
{
static string remotingFolder = System.Configuration.ConfigurationSettings.AppSettings[ " remotingFolder " ]; // 远程ftp文件目录
static string localFolder = System.Configuration.ConfigurationSettings.AppSettings[ " localFolder " ]; // 要下载到的本地目录
static string ftpServer = System.Configuration.ConfigurationSettings.AppSettings[ " ftpServer " ]; // ftp服务器
static string user = System.Configuration.ConfigurationSettings.AppSettings[ " user " ]; // 用户名
static string pwd = System.Configuration.ConfigurationSettings.AppSettings[ " pwd " ]; // 密码
static string port = System.Configuration.ConfigurationSettings.AppSettings[ " port " ]; // 端口
static void Main( string [] args)
{
FTPClient client = new FTPClient(ftpServer, " / " , user, pwd, int .Parse(port));
client.Connect();
GetFolder( " * " , remotingFolder, client, CreateFolder());
client.DisConnect();
ClearFolder();
Console.WriteLine( " 下载完毕 " );
System.Threading.Thread.Sleep( 3000 );
}
/// <summary>
/// 在本地目录下创建一个以日期为名称的目录，我做这个ftp的主要目的是为了每天都备份
/// </summary>
/// <returns> 创建的目录名 </returns>
private static string CreateFolder()
{
string folder=localFolder + " \\ " +DateTime.Now.ToShortDateString();
if (!Directory.Exists(folder))
Directory.CreateDirectory(folder);
return folder;
}
/// <summary>
/// 在下载结束后清空程序目录的多余文件
/// </summary>
private static void ClearFolder()
{
string folder = Environment.CurrentDirectory;
string [] dictorys = Directory.GetFiles(folder);
foreach ( string dictory in dictorys)
{
FileInfo info = new FileInfo(dictory);
if (info.Length == 0 )
File.Delete(dictory);
}
}
/// <summary>
/// 递归获取ftp文件夹的内容
/// </summary>
/// <param name="fileMark"> 文件标记 </param>
/// <param name="path"> 远程路径 </param>
/// <param name="client"></param>
/// <param name="folder"></param>
private static void GetFolder( string fileMark, string path, FTPClient client, string folder)
{
string [] dirs = client.Dir(path); // 获取目录下的内容
client.ChDir(path); // 改变目录
foreach ( string dir in dirs)
{
string [] infos = dir.Split( ' ' );
string info = infos[infos.Length - 1 ].Replace( " \r " , "" );
if (dir.StartsWith( " d " ) && ! string .IsNullOrEmpty(dir)) // 为目录
{
if (!info.EndsWith( " . " ) && !info.EndsWith( " .. " )) // 筛选出真实的目录
{
Directory.CreateDirectory(folder + " \\ " + info);
GetFolder(fileMark, path + " / " + info, client, folder + " \\ " + info);
client.ChDir(path);
}
}
else if (dir.StartsWith( " -r " )) // 为文件
{
string file = folder + " \\ " + info;
if (File.Exists(file))
{
long remotingSize = client.GetFileSize(info);
FileInfo fileInfo = new FileInfo(file);
long localSize = fileInfo.Length;
if (remotingSize != localSize) // 短点续传
{
client.GetBrokenFile(info, folder, info, localSize);
}
}
else
{
client.GetFile(info, folder, info); // 下载文件
Console.WriteLine( " 文件 " + folder + info + " 已经下载 " );
}
}
}
}
}
}
配置文件
<? xml version="1.0" encoding="utf-8" ?>
< configuration >
< appSettings >
< add key ="remotingFolder" value ="/temp" />
< add key ="localFolder" value ="c:\temp" />
< add key ="ftpServer" value ="*" />
< add key ="user" value ="*" />
< add key ="pwd" value ="*" />
< add key ="port" value ="21" />
</ appSettings >
</ configuration >
作者： Leo_wl
出处： http://www.cnblogs.com/Leo_wl/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
版权信息查看更多关于c#上传下载ftp(支持断点续传)的详细内容...