Discuz!NT 2.6带了一个FTP类，位于Discuz.Common\FTP.cs，使用它可以非常的方便的进行文件上传、下载操作以及其他常规文件(夹)操作。下边为该FTP类完整内容：
程序代码
简单使用示例：
程序代码
程序代码using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Text.RegularExpressions;
using System.Collections;
namespace Discuz.Common
{
/// <summary>
/// FTP类
/// </summary>
public class FTP
{
#region 变量声明
/// <summary>
/// 服务器连接地址
/// </summary>
public string server;
/// <summary>
/// 登陆帐号
/// </summary>
public string user;
/// <summary>
/// 登陆口令
/// </summary>
public string pass;
/// <summary>
/// 端口号
/// </summary>
public int port;
/// <summary>
/// 无响应时间（FTP在指定时间内无响应）
/// </summary>
public int timeout;
/// <summary>
/// 服务器错误状态信息
/// </summary>
public string errormessage;
/// <summary>
/// 服务器状态返回信息
/// </summary>
private string messages;
/// <summary>
/// 服务器的响应信息
/// </summary>
private string responseStr;
/// <summary>
/// 链接模式（主动或被动，默认为被动）
/// </summary>
private bool passive_mode;
/// <summary>
/// 上传或下载信息字节数
/// </summary>
private long bytes_total;
/// <summary>
/// 上传或下载的文件大小
/// </summary>
private long file_size;
/// <summary>
/// 主套接字
/// </summary>
private Socket main_sock;
/// <summary>
/// 要链接的网络地址终结点
/// </summary>
private IPEndPoint main_ipEndPoint;
/// <summary>
/// 侦听套接字
/// </summary>
private Socket listening_sock;
/// <summary>
/// 数据套接字
/// </summary>
private Socket data_sock;
/// <summary>
/// 要链接的网络数据地址终结点
/// </summary>
private IPEndPoint data_ipEndPoint;
/// <summary>
/// 用于上传或下载的文件流对象
/// </summary>
private FileStream file;
/// <summary>
/// 与FTP服务器交互的状态值
/// </summary>
private int response;
/// <summary>
/// 读取并保存当前命令执行后从FTP服务器端返回的数据信息
/// </summary>
private string bucket;
#endregion
#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
public FTP()
{
server = null;
user = null;
pass = null;
port = 21;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public FTP(string server, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
port = 21;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public FTP(string server, int port, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
/// <param name="mode">链接方式</param>
public FTP(string server, int port, string user, string pass, int mode)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = mode <= 1 ? true : false;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
this.timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
/// <param name="mode">链接方式</param>
/// <param name="timeout">无响应时间(限时),单位:秒 (小于或等于0为不受时间限制)</param>
public FTP(string server, int port, string user, string pass, int mode, int timeout_sec)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = mode <= 1 ? true : false;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
this.timeout = (timeout_sec <= 0) ? int.MaxValue : (timeout_sec * 1000); //无响应时间
messages = "";
errormessage = "";
}
#endregion
#region 属性
/// <summary>
/// 当前是否已连接
/// </summary>
public bool IsConnected
{
get
{
if (main_sock != null)
return main_sock.Connected;
return false;
}
}
/// <summary>
/// 当message缓冲区有数据则返回
/// </summary>
public bool MessagesAvailable
{
get
{
if (messages.Length > 0)
return true;
return false;
}
}
/// <summary>
/// 获取服务器状态返回信息, 并清空messages变量
/// </summary>
public string Messages
{
get
{
string tmp = messages;
messages = "";
return tmp;
}
}
/// <summary>
/// 最新指令发出后服务器的响应
/// </summary>
public string ResponseString
{
get
{
return responseStr;
}
}
/// <summary>
///在一次传输中,发送或接收的字节数
/// </summary>
public long BytesTotal
{
get
{
return bytes_total;
}
}
/// <summary>
///被下载或上传的文件大小,当文件大小无效时为0
/// </summary>
public long FileSize
{
get
{
return file_size;
}
}
/// <summary>
/// 链接模式:
/// true 被动模式 [默认]
/// false: 主动模式
/// </summary>
public bool PassiveMode
{
get
{
return passive_mode;
}
set
{
passive_mode = value;
}
}
#endregion
#region 操作
/// <summary>
/// 操作失败
/// </summary>
private void Fail()
{
Disconnect();
errormessage += responseStr;
//throw new Exception(responseStr);
}
/// <summary>
/// 下载文件类型
/// </summary>
/// <param name="mode">true:二进制文件 false:字符文件</param>
private void SetBinaryMode(bool mode)
{
if (mode)
SendCommand("TYPE I");
else
SendCommand("TYPE A");
ReadResponse();
if (response != 200)
Fail();
}
/// <summary>
/// 发送命令
/// </summary>
/// <param name="command"></param>
private void SendCommand(string command)
{
Byte[] cmd = Encoding.ASCII.GetBytes((command + "\r\n").ToCharArray());
if (command.Length > 3 && command.Substring(0, 4) == "PASS")
{
messages = "\rPASS xxx";
}
else
{
messages = "\r" + command;
}
try
{
main_sock.Send(cmd, cmd.Length, 0);
}
catch (Exception ex)
{
try
{
Disconnect();
errormessage += ex.Message;
return;
}
catch
{
main_sock.Close();
file.Close();
main_sock = null;
main_ipEndPoint = null;
file = null;
}
}
}
private void FillBucket()
{
Byte[] bytes = new Byte[512];
long bytesgot;
int msecs_passed = 0;
while (main_sock.Available < 1)
{
System.Threading.Thread.Sleep(50);
msecs_passed += 50;
//当等待时间到,则断开链接
if (msecs_passed > timeout)
{
Disconnect();
errormessage += "Timed out waiting on server to respond.";
return;
}
}
while (main_sock.Available > 0)
{
bytesgot = main_sock.Receive(bytes, 512, 0);
bucket += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
System.Threading.Thread.Sleep(50);
}
}
private string GetLineFromBucket()
{
int i;
string buf = "";
if ((i = bucket.IndexOf('\n')) < 0)
{
while (i < 0)
{
FillBucket();
i = bucket.IndexOf('\n');
}
}
buf = bucket.Substring(0, i);
bucket = bucket.Substring(i + 1);
return buf;
}
/// <summary>
/// 返回服务器端返回信息
/// </summary>
private void ReadResponse()
{
string buf;
messages = "";
while (true)
{
buf = GetLineFromBucket();
if (Regex.Match(buf, "^[0-9]+ ").Success)
{
responseStr = buf;
response = int.Parse(buf.Substring(0, 3));
break;
}
else
messages += Regex.Replace(buf, "^[0-9]+-", "") + "\n";
}
}
/// <summary>
/// 打开数据套接字
/// </summary>
private void OpenDataSocket()
{
if (passive_mode)
{
string[] pasv;
string server;
int port;
Connect();
SendCommand("PASV");
ReadResponse();
if (response != 227)
Fail();
try
{
int i1, i2;
i1 = responseStr.IndexOf('(') + 1;
i2 = responseStr.IndexOf(')') - i1;
pasv = responseStr.Substring(i1, i2).Split(',');
}
catch (Exception)
{
Disconnect();
errormessage += "Malformed PASV response: " + responseStr;
return ;
}
if (pasv.Length < 6)
{
Disconnect();
errormessage += "Malformed PASV response: " + responseStr;
return ;
}
server = String.Format("{0}.{1}.{2}.{3}", pasv[0], pasv[1], pasv[2], pasv[3]);
port = (int.Parse(pasv[4]) << 8) + int.Parse(pasv[5]);
try
{
CloseDataSocket();
data_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#if NET1
data_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
#else
data_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
#endif
data_sock.Connect(data_ipEndPoint);
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
return ;
}
}
else
{
Connect();
try
{
CloseDataSocket();
listening_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// 对于端口,则发送IP地址.下面则提取相应信息
string sLocAddr = main_sock.LocalEndPoint.ToString();
int ix = sLocAddr.IndexOf(':');
if (ix < 0)
{
errormessage += "Failed to parse the local address: " + sLocAddr;
return;
}
string sIPAddr = sLocAddr.Substring(0, ix);
// 系统自动绑定一个端口号(设置 port = 0)
System.Net.IPEndPoint localEP = new IPEndPoint(IPAddress.Parse(sIPAddr), 0);
listening_sock.Bind(localEP);
sLocAddr = listening_sock.LocalEndPoint.ToString();
ix = sLocAddr.IndexOf(':');
if (ix < 0)
{
errormessage += "Failed to parse the local address: " + sLocAddr;
}
int nPort = int.Parse(sLocAddr.Substring(ix + 1));
// 开始侦听链接请求
listening_sock.Listen(1);
string sPortCmd = string.Format("PORT {0},{1},{2}",
sIPAddr.Replace('.', ','),
nPort / 256, nPort % 256);
SendCommand(sPortCmd);
ReadResponse();
if (response != 200)
Fail();
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
return;
}
}
}
private void ConnectDataSocket()
{
if (data_sock != null) // 已链接
return;
try
{
data_sock = listening_sock.Accept(); // Accept is blocking
listening_sock.Close();
listening_sock = null;
if (data_sock == null)
{
throw new Exception("Winsock error: " +
Convert.ToString(System.Runtime.InteropServices.Marshal.GetLastWin32Error()));
}
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
}
}
private void CloseDataSocket()
{
if (data_sock != null)
{
if (data_sock.Connected)
{
data_sock.Close();
}
data_sock = null;
}
data_ipEndPoint = null;
}
/// <summary>
/// 关闭所有链接
/// </summary>
public void Disconnect()
{
CloseDataSocket();
if (main_sock != null)
{
if (main_sock.Connected)
{
SendCommand("QUIT");
main_sock.Close();
}
main_sock = null;
}
if (file != null)
file.Close();
main_ipEndPoint = null;
file = null;
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
/// <param name="server">要链接的IP地址或主机名</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public void Connect(string server, int port, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
Connect();
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
/// <param name="server">要链接的IP地址或主机名</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public void Connect(string server, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
Connect();
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
public bool Connect()
{
if (server == null)
{
errormessage += "No server has been set.\r\n";
}
if (user == null)
{
errormessage += "No server has been set.\r\n";
}
if (main_sock != null)
if (main_sock.Connected)
return true;
try
{
main_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#if NET1
main_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
#else
main_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
#endif
main_sock.Connect(main_ipEndPoint);
}
catch (Exception ex)
{
errormessage += ex.Message;
return false;
}
ReadResponse();
if (response != 220)
Fail();
SendCommand("USER " + user);
ReadResponse();
switch (response)
{
case 331:
if (pass == null)
{
Disconnect();
errormessage += "No password has been set.";
return false;
}
SendCommand("PASS " + pass);
ReadResponse();
if (response != 230)
{
Fail();
return false;
}
break;
case 230:
break;
}
return true;
}
/// <summary>
/// 获取FTP当前(工作)目录下的文件列表
/// </summary>
/// <returns>返回文件列表数组</returns>
public ArrayList List()
{
Byte[] bytes = new Byte[512];
string file_list = "";
long bytesgot = 0;
int msecs_passed = 0;
ArrayList list = new ArrayList();
Connect();
OpenDataSocket();
SendCommand("LIST");
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
CloseDataSocket();
throw new Exception(responseStr);
}
ConnectDataSocket();
while (data_sock.Available < 1)
{
System.Threading.Thread.Sleep(50);
msecs_passed += 50;
if (msecs_passed > (timeout / 10))
{
break;
}
}
while (data_sock.Available > 0)
{
bytesgot = data_sock.Receive(bytes, bytes.Length, 0);
file_list += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
System.Threading.Thread.Sleep(50);
}
CloseDataSocket();
ReadResponse();
if (response != 226)
throw new Exception(responseStr);
foreach (string f in file_list.Split('\n'))
{
if (f.Length > 0 && !Regex.Match(f, "^total").Success)
list.Add(f.Substring(0, f.Length - 1));
}
return list;
}
/// <summary>
/// 获取到文件名列表
/// </summary>
/// <returns>返回文件名列表</returns>
public ArrayList ListFiles()
{
ArrayList list = new ArrayList();
foreach (string f in List())
{
if ((f.Length > 0))
{
if ((f[0] != 'd') && (f.ToUpper().IndexOf("<DIR>") < 0))
list.Add(f);
}
}
return list;
}
/// <summary>
/// 获取路径列表
/// </summary>
/// <returns>返回路径列表</returns>
public ArrayList ListDirectories()
{
ArrayList list = new ArrayList();
foreach (string f in List())
{
if (f.Length > 0)
{
if ((f[0] == 'd') || (f.ToUpper().IndexOf("<DIR>") >= 0))
list.Add(f);
}
}
return list;
}
/// <summary>
/// 获取原始数据信息.
/// </summary>
/// <param name="fileName">远程文件名</param>
/// <returns>返回原始数据信息.</returns>
public string GetFileDateRaw(string fileName)
{
Connect();
SendCommand("MDTM " + fileName);
ReadResponse();
if (response != 213)
{
errormessage += responseStr;
return "";
}
return (this.responseStr.Substring(4));
}
/// <summary>
/// 得到文件日期.
/// </summary>
/// <param name="fileName">远程文件名</param>
/// <returns>返回远程文件日期</returns>
public DateTime GetFileDate(string fileName)
{
return ConvertFTPDateToDateTime(GetFileDateRaw(fileName));
}
private DateTime ConvertFTPDateToDateTime(string input)
{
if (input.Length < 14)
throw new ArgumentException("Input Value for ConvertFTPDateToDateTime method was too short.");
//YYYYMMDDhhmmss":
int year = Convert.ToInt16(input.Substring(0, 4));
int month = Convert.ToInt16(input.Substring(4, 2));
int day = Convert.ToInt16(input.Substring(6, 2));
int hour = Convert.ToInt16(input.Substring(8, 2));
int min = Convert.ToInt16(input.Substring(10, 2));
int sec = Convert.ToInt16(input.Substring(12, 2));
return new DateTime(year, month, day, hour, min, sec);
}
/// <summary>
/// 获取FTP上的当前(工作)路径
/// </summary>
/// <returns>返回FTP上的当前(工作)路径</returns>
public string GetWorkingDirectory()
{
//PWD - 显示工作路径
Connect();
SendCommand("PWD");
ReadResponse();
if (response != 257)
{
errormessage += responseStr;
}
string pwd;
try
{
pwd = responseStr.Substring(responseStr.IndexOf("\"", 0) + 1);//5);
pwd = pwd.Substring(0, pwd.LastIndexOf("\""));
pwd = pwd.Replace("\"\"", "\""); // 替换带引号的路径信息符号
}
catch (Exception ex)
{
errormessage += ex.Message;
return null;
}
return pwd;
}
/// <summary>
/// 跳转服务器上的当前(工作)路径
/// </summary>
/// <param name="path">要跳转的路径</param>
public bool ChangeDir(string path)
{
Connect();
SendCommand("CWD " + path);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
return false;
}
return true;
}
/// <summary>
/// 创建指定的目录
/// </summary>
/// <param name="dir">要创建的目录</param>
public void MakeDir(string dir)
{
Connect();
SendCommand("MKD " + dir);
ReadResponse();
switch (response)
{
case 257:
case 250:
break;
default:
{
errormessage += responseStr;
break;
}
}
}
/// <summary>
/// 移除FTP上的指定目录
/// </summary>
/// <param name="dir">要移除的目录</param>
public void RemoveDir(string dir)
{
Connect();
SendCommand("RMD " + dir);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
return; ;
}
}
/// <summary>
/// 移除FTP上的指定文件
/// </summary>
/// <param name="filename">要移除的文件名称</param>
public void RemoveFile(string filename)
{
Connect();
SendCommand("DELE " + filename);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
}
}
/// <summary>
/// 重命名FTP上的文件
/// </summary>
/// <param name="oldfilename">原文件名</param>
/// <param name="newfilename">新文件名</param>
public void RenameFile(string oldfilename, string newfilename)
{
Connect();
SendCommand("RNFR " + oldfilename);
ReadResponse();
if (response != 350)
{
errormessage += responseStr;
}
else
{
SendCommand("RNTO " + newfilename);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
}
}
}
/// <summary>
/// 获得指定文件的大小(如果FTP支持)
/// </summary>
/// <param name="filename">指定的文件</param>
/// <returns>返回指定文件的大小</returns>
public long GetFileSize(string filename)
{
Connect();
SendCommand("SIZE " + filename);
ReadResponse();
if (response != 213)
{
errormessage += responseStr;
}
return Int64.Parse(responseStr.Substring(4));
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">要上传的文件</param>
public bool OpenUpload(string filename)
{
return OpenUpload(filename, filename, false);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="remotefilename">远程要覆盖的文件名</param>
public bool OpenUpload(string filename, string remotefilename)
{
return OpenUpload(filename, remotefilename, false);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="resume">如果存在,则尝试恢复</param>
public bool OpenUpload(string filename, bool resume)
{
return OpenUpload(filename, filename, resume);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="remote_filename">远程要覆盖的文件名</param>
/// <param name="resume">如果存在,则尝试恢复</param>
public bool OpenUpload(string filename, string remote_filename, bool resume)
{
Connect();
SetBinaryMode(true);
OpenDataSocket();
bytes_total = 0;
try
{
file = new FileStream(filename, FileMode.Open);
}
catch (Exception ex)
{
file = null;
errormessage += ex.Message;
return false;
}
file_size = file.Length;
if (resume)
{
long size = GetFileSize(remote_filename);
SendCommand("REST " + size);
ReadResponse();
if (response == 350)
file.Seek(size, SeekOrigin.Begin);
}
SendCommand("STOR " + remote_filename);
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
file.Close();
file = null;
errormessage += responseStr;
return false;
}
ConnectDataSocket();
return true;
}
/// <summary>
/// 下载指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
public void OpenDownload(string filename)
{
OpenDownload(filename, filename, false);
}
/// <summary>
/// 下载并恢复指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
/// <param name="resume">如文件存在,则尝试恢复</param>
public void OpenDownload(string filename, bool resume)
{
OpenDownload(filename, filename, resume);
}
/// <summary>
/// 下载指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
/// <param name="localfilename">本地文件名</param>
public void OpenDownload(string remote_filename, string localfilename)
{
OpenDownload(remote_filename, localfilename, false);
}
/// <summary>
/// 打开并下载文件
/// </summary>
/// <param name="remote_filename">远程文件名称</param>
/// <param name="local_filename">本地文件名</param>
/// <param name="resume">如果文件存在则恢复</param>
public void OpenDownload(string remote_filename, string local_filename, bool resume)
{
Connect();
SetBinaryMode(true);
bytes_total = 0;
try
{
file_size = GetFileSize(remote_filename);
}
catch
{
file_size = 0;
}
if (resume && File.Exists(local_filename))
{
try
{
file = new FileStream(local_filename, FileMode.Open);
}
catch (Exception ex)
{
file = null;
throw new Exception(ex.Message);
}
SendCommand("REST " + file.Length);
ReadResponse();
if (response != 350)
throw new Exception(responseStr);
file.Seek(file.Length, SeekOrigin.Begin);
bytes_total = file.Length;
}
else
{
try
{
file = new FileStream(local_filename, FileMode.Create);
}
catch (Exception ex)
{
file = null;
throw new Exception(ex.Message);
}
}
OpenDataSocket();
SendCommand("RETR " + remote_filename);
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
file.Close();
file = null;
errormessage += responseStr;
return;
}
ConnectDataSocket();
return;
}
/// <summary>
/// 上传文件(循环调用直到上传完毕)
/// </summary>
/// <returns>发送的字节数</returns>
public long DoUpload()
{
Byte[] bytes = new Byte[512];
long bytes_got;
try
{
bytes_got = file.Read(bytes, 0, bytes.Length);
bytes_total += bytes_got;
data_sock.Send(bytes, (int)bytes_got, 0);
if (bytes_got <= 0)
{
//上传完毕或有错误发生
file.Close();
file = null;
CloseDataSocket();
ReadResponse();
switch (response)
{
case 226:
case 250:
break;
default: //当上传中断时
{
errormessage += responseStr;
return -1;
}
}
SetBinaryMode(false);
}
}
catch (Exception ex)
{
file.Close();
file = null;
CloseDataSocket();
ReadResponse();
SetBinaryMode(false);
//throw ex;
//当上传中断时
errormessage += ex.Message;
return -1;
}
return bytes_got;
}
/// <summary>
/// 下载文件(循环调用直到下载完毕)
/// </summary>
/// <returns>接收到的字节点</returns>
public long DoDownload()
{
Byte[] bytes = new Byte[512];
long bytes_got;
try
{
bytes_got = data_sock.Receive(bytes, bytes.Length, 0);
if (bytes_got <= 0)
{
//下载完毕或有错误发生
CloseDataSocket();
file.Close();
file = null;
ReadResponse();
switch (response)
{
case 226:
case 250:
break;
default:
{
errormessage += responseStr;
return -1;
}
}
SetBinaryMode(false);
return bytes_got;
}
file.Write(bytes, 0, (int)bytes_got);
bytes_total += bytes_got;
}
catch (Exception ex)
{
CloseDataSocket();
file.Close();
file = null;
ReadResponse();
SetBinaryMode(false);
//throw ex;
//当下载中断时
errormessage += ex.Message;
return -1;
}
return bytes_got;
}
#endregion
}
}
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Text.RegularExpressions;
using System.Collections;
namespace Discuz.Common
{
/// <summary>
/// FTP类
/// </summary>
public class FTP
{
#region 变量声明
/// <summary>
/// 服务器连接地址
/// </summary>
public string server;
/// <summary>
/// 登陆帐号
/// </summary>
public string user;
/// <summary>
/// 登陆口令
/// </summary>
public string pass;
/// <summary>
/// 端口号
/// </summary>
public int port;
/// <summary>
/// 无响应时间（FTP在指定时间内无响应）
/// </summary>
public int timeout;
/// <summary>
/// 服务器错误状态信息
/// </summary>
public string errormessage;
/// <summary>
/// 服务器状态返回信息
/// </summary>
private string messages;
/// <summary>
/// 服务器的响应信息
/// </summary>
private string responseStr;
/// <summary>
/// 链接模式（主动或被动，默认为被动）
/// </summary>
private bool passive_mode;
/// <summary>
/// 上传或下载信息字节数
/// </summary>
private long bytes_total;
/// <summary>
/// 上传或下载的文件大小
/// </summary>
private long file_size;
/// <summary>
/// 主套接字
/// </summary>
private Socket main_sock;
/// <summary>
/// 要链接的网络地址终结点
/// </summary>
private IPEndPoint main_ipEndPoint;
/// <summary>
/// 侦听套接字
/// </summary>
private Socket listening_sock;
/// <summary>
/// 数据套接字
/// </summary>
private Socket data_sock;
/// <summary>
/// 要链接的网络数据地址终结点
/// </summary>
private IPEndPoint data_ipEndPoint;
/// <summary>
/// 用于上传或下载的文件流对象
/// </summary>
private FileStream file;
/// <summary>
/// 与FTP服务器交互的状态值
/// </summary>
private int response;
/// <summary>
/// 读取并保存当前命令执行后从FTP服务器端返回的数据信息
/// </summary>
private string bucket;
#endregion
#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
public FTP()
{
server = null;
user = null;
pass = null;
port = 21;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public FTP(string server, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
port = 21;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public FTP(string server, int port, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = true;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
/// <param name="mode">链接方式</param>
public FTP(string server, int port, string user, string pass, int mode)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = mode <= 1 ? true : false;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
this.timeout = 10000; //无响应时间为10秒
messages = "";
errormessage = "";
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="server">服务器IP或名称</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
/// <param name="mode">链接方式</param>
/// <param name="timeout">无响应时间(限时),单位:秒 (小于或等于0为不受时间限制)</param>
public FTP(string server, int port, string user, string pass, int mode, int timeout_sec)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
passive_mode = mode <= 1 ? true : false;
main_sock = null;
main_ipEndPoint = null;
listening_sock = null;
data_sock = null;
data_ipEndPoint = null;
file = null;
bucket = "";
bytes_total = 0;
this.timeout = (timeout_sec <= 0) ? int.MaxValue : (timeout_sec * 1000); //无响应时间
messages = "";
errormessage = "";
}
#endregion
#region 属性
/// <summary>
/// 当前是否已连接
/// </summary>
public bool IsConnected
{
get
{
if (main_sock != null)
return main_sock.Connected;
return false;
}
}
/// <summary>
/// 当message缓冲区有数据则返回
/// </summary>
public bool MessagesAvailable
{
get
{
if (messages.Length > 0)
return true;
return false;
}
}
/// <summary>
/// 获取服务器状态返回信息, 并清空messages变量
/// </summary>
public string Messages
{
get
{
string tmp = messages;
messages = "";
return tmp;
}
}
/// <summary>
/// 最新指令发出后服务器的响应
/// </summary>
public string ResponseString
{
get
{
return responseStr;
}
}
/// <summary>
///在一次传输中,发送或接收的字节数
/// </summary>
public long BytesTotal
{
get
{
return bytes_total;
}
}
/// <summary>
///被下载或上传的文件大小,当文件大小无效时为0
/// </summary>
public long FileSize
{
get
{
return file_size;
}
}
/// <summary>
/// 链接模式:
/// true 被动模式 [默认]
/// false: 主动模式
/// </summary>
public bool PassiveMode
{
get
{
return passive_mode;
}
set
{
passive_mode = value;
}
}
#endregion
#region 操作
/// <summary>
/// 操作失败
/// </summary>
private void Fail()
{
Disconnect();
errormessage += responseStr;
//throw new Exception(responseStr);
}
/// <summary>
/// 下载文件类型
/// </summary>
/// <param name="mode">true:二进制文件 false:字符文件</param>
private void SetBinaryMode(bool mode)
{
if (mode)
SendCommand("TYPE I");
else
SendCommand("TYPE A");
ReadResponse();
if (response != 200)
Fail();
}
/// <summary>
/// 发送命令
/// </summary>
/// <param name="command"></param>
private void SendCommand(string command)
{
Byte[] cmd = Encoding.ASCII.GetBytes((command + "\r\n").ToCharArray());
if (command.Length > 3 && command.Substring(0, 4) == "PASS")
{
messages = "\rPASS xxx";
}
else
{
messages = "\r" + command;
}
try
{
main_sock.Send(cmd, cmd.Length, 0);
}
catch (Exception ex)
{
try
{
Disconnect();
errormessage += ex.Message;
return;
}
catch
{
main_sock.Close();
file.Close();
main_sock = null;
main_ipEndPoint = null;
file = null;
}
}
}
private void FillBucket()
{
Byte[] bytes = new Byte[512];
long bytesgot;
int msecs_passed = 0;
while (main_sock.Available < 1)
{
System.Threading.Thread.Sleep(50);
msecs_passed += 50;
//当等待时间到,则断开链接
if (msecs_passed > timeout)
{
Disconnect();
errormessage += "Timed out waiting on server to respond.";
return;
}
}
while (main_sock.Available > 0)
{
bytesgot = main_sock.Receive(bytes, 512, 0);
bucket += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
System.Threading.Thread.Sleep(50);
}
}
private string GetLineFromBucket()
{
int i;
string buf = "";
if ((i = bucket.IndexOf('\n')) < 0)
{
while (i < 0)
{
FillBucket();
i = bucket.IndexOf('\n');
}
}
buf = bucket.Substring(0, i);
bucket = bucket.Substring(i + 1);
return buf;
}
/// <summary>
/// 返回服务器端返回信息
/// </summary>
private void ReadResponse()
{
string buf;
messages = "";
while (true)
{
buf = GetLineFromBucket();
if (Regex.Match(buf, "^[0-9]+ ").Success)
{
responseStr = buf;
response = int.Parse(buf.Substring(0, 3));
break;
}
else
messages += Regex.Replace(buf, "^[0-9]+-", "") + "\n";
}
}
/// <summary>
/// 打开数据套接字
/// </summary>
private void OpenDataSocket()
{
if (passive_mode)
{
string[] pasv;
string server;
int port;
Connect();
SendCommand("PASV");
ReadResponse();
if (response != 227)
Fail();
try
{
int i1, i2;
i1 = responseStr.IndexOf('(') + 1;
i2 = responseStr.IndexOf(')') - i1;
pasv = responseStr.Substring(i1, i2).Split(',');
}
catch (Exception)
{
Disconnect();
errormessage += "Malformed PASV response: " + responseStr;
return ;
}
if (pasv.Length < 6)
{
Disconnect();
errormessage += "Malformed PASV response: " + responseStr;
return ;
}
server = String.Format("{0}.{1}.{2}.{3}", pasv[0], pasv[1], pasv[2], pasv[3]);
port = (int.Parse(pasv[4]) << 8) + int.Parse(pasv[5]);
try
{
CloseDataSocket();
data_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#if NET1
data_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
#else
data_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
#endif
data_sock.Connect(data_ipEndPoint);
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
return ;
}
}
else
{
Connect();
try
{
CloseDataSocket();
listening_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// 对于端口,则发送IP地址.下面则提取相应信息
string sLocAddr = main_sock.LocalEndPoint.ToString();
int ix = sLocAddr.IndexOf(':');
if (ix < 0)
{
errormessage += "Failed to parse the local address: " + sLocAddr;
return;
}
string sIPAddr = sLocAddr.Substring(0, ix);
// 系统自动绑定一个端口号(设置 port = 0)
System.Net.IPEndPoint localEP = new IPEndPoint(IPAddress.Parse(sIPAddr), 0);
listening_sock.Bind(localEP);
sLocAddr = listening_sock.LocalEndPoint.ToString();
ix = sLocAddr.IndexOf(':');
if (ix < 0)
{
errormessage += "Failed to parse the local address: " + sLocAddr;
}
int nPort = int.Parse(sLocAddr.Substring(ix + 1));
// 开始侦听链接请求
listening_sock.Listen(1);
string sPortCmd = string.Format("PORT {0},{1},{2}",
sIPAddr.Replace('.', ','),
nPort / 256, nPort % 256);
SendCommand(sPortCmd);
ReadResponse();
if (response != 200)
Fail();
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
return;
}
}
}
private void ConnectDataSocket()
{
if (data_sock != null) // 已链接
return;
try
{
data_sock = listening_sock.Accept(); // Accept is blocking
listening_sock.Close();
listening_sock = null;
if (data_sock == null)
{
throw new Exception("Winsock error: " +
Convert.ToString(System.Runtime.InteropServices.Marshal.GetLastWin32Error()));
}
}
catch (Exception ex)
{
errormessage += "Failed to connect for data transfer: " + ex.Message;
}
}
private void CloseDataSocket()
{
if (data_sock != null)
{
if (data_sock.Connected)
{
data_sock.Close();
}
data_sock = null;
}
data_ipEndPoint = null;
}
/// <summary>
/// 关闭所有链接
/// </summary>
public void Disconnect()
{
CloseDataSocket();
if (main_sock != null)
{
if (main_sock.Connected)
{
SendCommand("QUIT");
main_sock.Close();
}
main_sock = null;
}
if (file != null)
file.Close();
main_ipEndPoint = null;
file = null;
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
/// <param name="server">要链接的IP地址或主机名</param>
/// <param name="port">端口号</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public void Connect(string server, int port, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
this.port = port;
Connect();
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
/// <param name="server">要链接的IP地址或主机名</param>
/// <param name="user">登陆帐号</param>
/// <param name="pass">登陆口令</param>
public void Connect(string server, string user, string pass)
{
this.server = server;
this.user = user;
this.pass = pass;
Connect();
}
/// <summary>
/// 链接到FTP服务器
/// </summary>
public bool Connect()
{
if (server == null)
{
errormessage += "No server has been set.\r\n";
}
if (user == null)
{
errormessage += "No server has been set.\r\n";
}
if (main_sock != null)
if (main_sock.Connected)
return true;
try
{
main_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#if NET1
main_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
#else
main_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
#endif
main_sock.Connect(main_ipEndPoint);
}
catch (Exception ex)
{
errormessage += ex.Message;
return false;
}
ReadResponse();
if (response != 220)
Fail();
SendCommand("USER " + user);
ReadResponse();
switch (response)
{
case 331:
if (pass == null)
{
Disconnect();
errormessage += "No password has been set.";
return false;
}
SendCommand("PASS " + pass);
ReadResponse();
if (response != 230)
{
Fail();
return false;
}
break;
case 230:
break;
}
return true;
}
/// <summary>
/// 获取FTP当前(工作)目录下的文件列表
/// </summary>
/// <returns>返回文件列表数组</returns>
public ArrayList List()
{
Byte[] bytes = new Byte[512];
string file_list = "";
long bytesgot = 0;
int msecs_passed = 0;
ArrayList list = new ArrayList();
Connect();
OpenDataSocket();
SendCommand("LIST");
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
CloseDataSocket();
throw new Exception(responseStr);
}
ConnectDataSocket();
while (data_sock.Available < 1)
{
System.Threading.Thread.Sleep(50);
msecs_passed += 50;
if (msecs_passed > (timeout / 10))
{
break;
}
}
while (data_sock.Available > 0)
{
bytesgot = data_sock.Receive(bytes, bytes.Length, 0);
file_list += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
System.Threading.Thread.Sleep(50);
}
CloseDataSocket();
ReadResponse();
if (response != 226)
throw new Exception(responseStr);
foreach (string f in file_list.Split('\n'))
{
if (f.Length > 0 && !Regex.Match(f, "^total").Success)
list.Add(f.Substring(0, f.Length - 1));
}
return list;
}
/// <summary>
/// 获取到文件名列表
/// </summary>
/// <returns>返回文件名列表</returns>
public ArrayList ListFiles()
{
ArrayList list = new ArrayList();
foreach (string f in List())
{
if ((f.Length > 0))
{
if ((f[0] != 'd') && (f.ToUpper().IndexOf("<DIR>") < 0))
list.Add(f);
}
}
return list;
}
/// <summary>
/// 获取路径列表
/// </summary>
/// <returns>返回路径列表</returns>
public ArrayList ListDirectories()
{
ArrayList list = new ArrayList();
foreach (string f in List())
{
if (f.Length > 0)
{
if ((f[0] == 'd') || (f.ToUpper().IndexOf("<DIR>") >= 0))
list.Add(f);
}
}
return list;
}
/// <summary>
/// 获取原始数据信息.
/// </summary>
/// <param name="fileName">远程文件名</param>
/// <returns>返回原始数据信息.</returns>
public string GetFileDateRaw(string fileName)
{
Connect();
SendCommand("MDTM " + fileName);
ReadResponse();
if (response != 213)
{
errormessage += responseStr;
return "";
}
return (this.responseStr.Substring(4));
}
/// <summary>
/// 得到文件日期.
/// </summary>
/// <param name="fileName">远程文件名</param>
/// <returns>返回远程文件日期</returns>
public DateTime GetFileDate(string fileName)
{
return ConvertFTPDateToDateTime(GetFileDateRaw(fileName));
}
private DateTime ConvertFTPDateToDateTime(string input)
{
if (input.Length < 14)
throw new ArgumentException("Input Value for ConvertFTPDateToDateTime method was too short.");
//YYYYMMDDhhmmss":
int year = Convert.ToInt16(input.Substring(0, 4));
int month = Convert.ToInt16(input.Substring(4, 2));
int day = Convert.ToInt16(input.Substring(6, 2));
int hour = Convert.ToInt16(input.Substring(8, 2));
int min = Convert.ToInt16(input.Substring(10, 2));
int sec = Convert.ToInt16(input.Substring(12, 2));
return new DateTime(year, month, day, hour, min, sec);
}
/// <summary>
/// 获取FTP上的当前(工作)路径
/// </summary>
/// <returns>返回FTP上的当前(工作)路径</returns>
public string GetWorkingDirectory()
{
//PWD - 显示工作路径
Connect();
SendCommand("PWD");
ReadResponse();
if (response != 257)
{
errormessage += responseStr;
}
string pwd;
try
{
pwd = responseStr.Substring(responseStr.IndexOf("\"", 0) + 1);//5);
pwd = pwd.Substring(0, pwd.LastIndexOf("\""));
pwd = pwd.Replace("\"\"", "\""); // 替换带引号的路径信息符号
}
catch (Exception ex)
{
errormessage += ex.Message;
return null;
}
return pwd;
}
/// <summary>
/// 跳转服务器上的当前(工作)路径
/// </summary>
/// <param name="path">要跳转的路径</param>
public bool ChangeDir(string path)
{
Connect();
SendCommand("CWD " + path);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
return false;
}
return true;
}
/// <summary>
/// 创建指定的目录
/// </summary>
/// <param name="dir">要创建的目录</param>
public void MakeDir(string dir)
{
Connect();
SendCommand("MKD " + dir);
ReadResponse();
switch (response)
{
case 257:
case 250:
break;
default:
{
errormessage += responseStr;
break;
}
}
}
/// <summary>
/// 移除FTP上的指定目录
/// </summary>
/// <param name="dir">要移除的目录</param>
public void RemoveDir(string dir)
{
Connect();
SendCommand("RMD " + dir);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
return; ;
}
}
/// <summary>
/// 移除FTP上的指定文件
/// </summary>
/// <param name="filename">要移除的文件名称</param>
public void RemoveFile(string filename)
{
Connect();
SendCommand("DELE " + filename);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
}
}
/// <summary>
/// 重命名FTP上的文件
/// </summary>
/// <param name="oldfilename">原文件名</param>
/// <param name="newfilename">新文件名</param>
public void RenameFile(string oldfilename, string newfilename)
{
Connect();
SendCommand("RNFR " + oldfilename);
ReadResponse();
if (response != 350)
{
errormessage += responseStr;
}
else
{
SendCommand("RNTO " + newfilename);
ReadResponse();
if (response != 250)
{
errormessage += responseStr;
}
}
}
/// <summary>
/// 获得指定文件的大小(如果FTP支持)
/// </summary>
/// <param name="filename">指定的文件</param>
/// <returns>返回指定文件的大小</returns>
public long GetFileSize(string filename)
{
Connect();
SendCommand("SIZE " + filename);
ReadResponse();
if (response != 213)
{
errormessage += responseStr;
}
return Int64.Parse(responseStr.Substring(4));
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">要上传的文件</param>
public bool OpenUpload(string filename)
{
return OpenUpload(filename, filename, false);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="remotefilename">远程要覆盖的文件名</param>
public bool OpenUpload(string filename, string remotefilename)
{
return OpenUpload(filename, remotefilename, false);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="resume">如果存在,则尝试恢复</param>
public bool OpenUpload(string filename, bool resume)
{
return OpenUpload(filename, filename, resume);
}
/// <summary>
/// 上传指定的文件
/// </summary>
/// <param name="filename">本地文件名</param>
/// <param name="remote_filename">远程要覆盖的文件名</param>
/// <param name="resume">如果存在,则尝试恢复</param>
public bool OpenUpload(string filename, string remote_filename, bool resume)
{
Connect();
SetBinaryMode(true);
OpenDataSocket();
bytes_total = 0;
try
{
file = new FileStream(filename, FileMode.Open);
}
catch (Exception ex)
{
file = null;
errormessage += ex.Message;
return false;
}
file_size = file.Length;
if (resume)
{
long size = GetFileSize(remote_filename);
SendCommand("REST " + size);
ReadResponse();
if (response == 350)
file.Seek(size, SeekOrigin.Begin);
}
SendCommand("STOR " + remote_filename);
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
file.Close();
file = null;
errormessage += responseStr;
return false;
}
ConnectDataSocket();
return true;
}
/// <summary>
/// 下载指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
public void OpenDownload(string filename)
{
OpenDownload(filename, filename, false);
}
/// <summary>
/// 下载并恢复指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
/// <param name="resume">如文件存在,则尝试恢复</param>
public void OpenDownload(string filename, bool resume)
{
OpenDownload(filename, filename, resume);
}
/// <summary>
/// 下载指定文件
/// </summary>
/// <param name="filename">远程文件名称</param>
/// <param name="localfilename">本地文件名</param>
public void OpenDownload(string remote_filename, string localfilename)
{
OpenDownload(remote_filename, localfilename, false);
}
/// <summary>
/// 打开并下载文件
/// </summary>
/// <param name="remote_filename">远程文件名称</param>
/// <param name="local_filename">本地文件名</param>
/// <param name="resume">如果文件存在则恢复</param>
public void OpenDownload(string remote_filename, string local_filename, bool resume)
{
Connect();
SetBinaryMode(true);
bytes_total = 0;
try
{
file_size = GetFileSize(remote_filename);
}
catch
{
file_size = 0;
}
if (resume && File.Exists(local_filename))
{
try
{
file = new FileStream(local_filename, FileMode.Open);
}
catch (Exception ex)
{
file = null;
throw new Exception(ex.Message);
}
SendCommand("REST " + file.Length);
ReadResponse();
if (response != 350)
throw new Exception(responseStr);
file.Seek(file.Length, SeekOrigin.Begin);
bytes_total = file.Length;
}
else
{
try
{
file = new FileStream(local_filename, FileMode.Create);
}
catch (Exception ex)
{
file = null;
throw new Exception(ex.Message);
}
}
OpenDataSocket();
SendCommand("RETR " + remote_filename);
ReadResponse();
switch (response)
{
case 125:
case 150:
break;
default:
file.Close();
file = null;
errormessage += responseStr;
return;
}
ConnectDataSocket();
return;
}
/// <summary>
/// 上传文件(循环调用直到上传完毕)
/// </summary>
/// <returns>发送的字节数</returns>
public long DoUpload()
{
Byte[] bytes = new Byte[512];
long bytes_got;
try
{
bytes_got = file.Read(bytes, 0, bytes.Length);
bytes_total += bytes_got;
data_sock.Send(bytes, (int)bytes_got, 0);
if (bytes_got <= 0)
{
//上传完毕或有错误发生
file.Close();
file = null;
CloseDataSocket();
ReadResponse();
switch (response)
{
case 226:
case 250:
break;
default: //当上传中断时
{
errormessage += responseStr;
return -1;
}
}
SetBinaryMode(false);
}
}
catch (Exception ex)
{
file.Close();
file = null;
CloseDataSocket();
ReadResponse();
SetBinaryMode(false);
//throw ex;
//当上传中断时
errormessage += ex.Message;
return -1;
}
return bytes_got;
}
/// <summary>
/// 下载文件(循环调用直到下载完毕)
/// </summary>
/// <returns>接收到的字节点</returns>
public long DoDownload()
{
Byte[] bytes = new Byte[512];
long bytes_got;
try
{
bytes_got = data_sock.Receive(bytes, bytes.Length, 0);
if (bytes_got <= 0)
{
//下载完毕或有错误发生
CloseDataSocket();
file.Close();
file = null;
ReadResponse();
switch (response)
{
case 226:
case 250:
break;
default:
{
errormessage += responseStr;
return -1;
}
}
SetBinaryMode(false);
return bytes_got;
}
file.Write(bytes, 0, (int)bytes_got);
bytes_total += bytes_got;
}
catch (Exception ex)
{
CloseDataSocket();
file.Close();
file = null;
ReadResponse();
SetBinaryMode(false);
//throw ex;
//当下载中断时
errormessage += ex.Message;
return -1;
}
return bytes_got;
}
#endregion
}
}
简单使用示例：
程序代码FTP ftp = new FTP("127.0.0.1", "abc", "123456");
//建立文件夹
ftp.MakeDir("com");
ftp.ChangeDir("com");
ftp.MakeDir("mzwu");
ftp.ChangeDir("mzwu");
//文件夹列表
ArrayList list = ftp.ListDirectories();
for (int i = 0; i < list.Count; i++)
{
Response.Write(list[i].ToString() + "<br/>");
}
//删除文件夹(不能直接删除非空文件夹)
ftp.RemoveDir("com\\mzwu");
//上传文件
ftp.Connect();
ftp.OpenUpload(@"F:\mzwucom.jpg", Path.GetFileName(@"F:\mzwucom.jpg"));
while (ftp.DoUpload() > 0)
{
int perc = (int)(((ftp.BytesTotal) * 100) / ftp.FileSize);
Response.Write(perc.ToString() + "%<br/>");
Response.Flush();
}
ftp.Disconnect();
//下载文件
ftp.Connect();
ftp.OpenDownload("mzwucom.jpg", @"E:\mzwucom.jpg");
while (ftp.DoDownload() > 0)
{
int perc = (int)(((ftp.BytesTotal) * 100) / ftp.FileSize);
Response.Write(perc.ToString() + "%<br/>");
Response.Flush();
}
ftp.Disconnect();
//文件列表
ArrayList list = ftp.ListFiles();
for (int i = 0; i < list.Count; i++)
{
Response.Write(list[i].ToString() + "<br/>");
}
//文件重命名
ftp.RenameFile("mzwucom.jpg", "test.jpg");
//删除文件
ftp.RemoveFile("test.jpg");
//显示错误信息
Response.Write(ftp.errormessage);
//建立文件夹
ftp.MakeDir("com");
ftp.ChangeDir("com");
ftp.MakeDir("mzwu");
ftp.ChangeDir("mzwu");
//文件夹列表
ArrayList list = ftp.ListDirectories();
for (int i = 0; i < list.Count; i++)
{
Response.Write(list[i].ToString() + "<br/>");
}
//删除文件夹(不能直接删除非空文件夹)
ftp.RemoveDir("com\\mzwu");
//上传文件
ftp.Connect();
ftp.OpenUpload(@"F:\mzwucom.jpg", Path.GetFileName(@"F:\mzwucom.jpg"));
while (ftp.DoUpload() > 0)
{
int perc = (int)(((ftp.BytesTotal) * 100) / ftp.FileSize);
Response.Write(perc.ToString() + "%<br/>");
Response.Flush();
}
ftp.Disconnect();
//下载文件
ftp.Connect();
ftp.OpenDownload("mzwucom.jpg", @"E:\mzwucom.jpg");
while (ftp.DoDownload() > 0)
{
int perc = (int)(((ftp.BytesTotal) * 100) / ftp.FileSize);
Response.Write(perc.ToString() + "%<br/>");
Response.Flush();
}
ftp.Disconnect();
//文件列表
ArrayList list = ftp.ListFiles();
for (int i = 0; i < list.Count; i++)
{
Response.Write(list[i].ToString() + "<br/>");
}
//文件重命名
ftp.RenameFile("mzwucom.jpg", "test.jpg");
//删除文件
ftp.RemoveFile("test.jpg");
//显示错误信息
Response.Write(ftp.errormessage);
