using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
using System.Collections;
namespace FtpLib
{
public class FTPFactory
{
private string remoteHost,remotePath,remoteUser,remotePass,mes;
private int remotePort,bytes;
private Socket clientSocket;
private int retValue;
private Boolean debug;
private Boolean logined;
private string reply;
private static int BLOCK_SIZE = 512;
Byte[] buffer = new Byte[BLOCK_SIZE];
Encoding ASCII = Encoding.ASCII;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="remHost">远程主机地址</param>
/// <param name="remPort">远程端口</param>
/// <param name="remPath">远程路径</param>
/// <param name="remUser">远程用户</param>
/// <param name="remPass">远程用户密码</param>
/// <param name="debugFlag">调试标志</param>
public FTPFactory(string remHost, int remPort, string remPath, string remUser, string remPass, bool debugFlag)
{
remoteHost = remHost;
remotePort = remPort;
remotePath = remPath;
remoteUser = remUser;
remotePass = remPass;
debug = debugFlag;
logined = false;
}
/// <summary>
/// 远程主机地址
/// </summary>
public string RemoteHost
{
get
{
return this.remoteHost;
}
set
{
this.remoteHost = value;
}
}
/// <summary>
/// 远程端口
/// </summary>
public int RemotePort
{
get
{
return this.remotePort;
}
set
{
this.remotePort = value;
}
}
/// <summary>
/// 远程主机路径
/// </summary>
public string RemotePath
{
get
{
return this.remotePath;
}
set
{
this.remotePath = value;
}
}
/// <summary>
/// 远程用户名
/// </summary>
public string RemoteUser
{
get
{
return this.remoteUser;
}
set
{
this.remoteUser = value;
}
}
/// <summary>
/// 远程用户密码
/// </summary>
public string RemotePass
{
set
{
this.remotePass = value;
}
}
/// <summary>
/// 获得目录列表
/// </summary>
/// <param name="mask">目录</param>
/// <returns>目录集合</returns>
public string[] getDirList(string mask)
{
if(!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("LIST " + mask);
if(!(retValue == 150 || retValue == 125 || retValue == 226))
{
throw new IOException(reply.Substring(4));
}
mes = "";
while(true)
{
int bytes = cSocket.Receive(buffer, buffer.Length, 0);
mes += ASCII.GetString(buffer, 0, bytes);
if(bytes < buffer.Length)
{
break;
}
}
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
cSocket.Close();
ArrayList list = new ArrayList();
foreach(string m in mess)
{
if (m.StartsWith("d") && !m.EndsWith(".\r") && !m.EndsWith("..\r"))
{
if (!"".Equals(this.getDirName(m)))
list.Add(this.getDirName(m));
}
}
string[] dirs = new string[list.Count];
for(int i=0;i<dirs.Length;i++)
{
dirs[i] = list[i].ToString();
}
readReply();
if(retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return dirs;
}
/// <summary>
/// 获得文件列表
/// </summary>
/// <param name="mask">目录</param>
/// <returns>文件列表</returns>
public string[] getFileList(string mask)
{
if(!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("NLST " + mask);
if (retValue == 550)
return new string[0];
if(!(retValue == 150 || retValue == 125 || retValue == 226))
{
throw new IOException(reply.Substring(4));
}
mes = "";
while(true)
{
int bytes = cSocket.Receive(buffer, buffer.Length, 0);
mes += ASCII.GetString(buffer, 0, bytes);
if(bytes < buffer.Length)
{
break;
}
}
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
cSocket.Close();
ArrayList list = new ArrayList();
foreach(string m in mess)
{
if (!"".Equals(m.Replace("\r","")))
list.Add(m.Replace("\r",""));
}
string[] files = new string[list.Count];
for(int i=0;i<files.Length;i++)
{
files[i] = list[i].ToString();
}
readReply();
if(retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return files;
}
/// <summary>
/// 获得文件大小
/// </summary>
/// <param name="fileName">文件名</param>
/// <returns></returns>
public long getFileSize(string fileName)
{
if(!logined)
{
login();
}
sendCommand("SIZE " + fileName);
long size=0;
if(retValue == 213)
{
size = Int64.Parse(reply.Substring(4));
}
else
{
throw new IOException(reply.Substring(4));
}
return size;
}
/// <summary>
/// 登录
/// </summary>
public void login()
{
clientSocket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(Dns.Resolve(remoteHost).AddressList[0], remotePort);
try
{
clientSocket.Connect(ep);
}
catch(Exception)
{
throw new IOException("Couldn't connect to remote server");
}
readReply();
if(retValue != 220)
{
close();
throw new IOException(reply.Substring(4));
}
if(debug)
Console.WriteLine("USER "+remoteUser);
sendCommand("USER "+remoteUser);
if( !(retValue == 331 || retValue == 230) )
{
cleanup();
throw new IOException(reply.Substring(4));
}
if( retValue != 230 )
{
if(debug)
Console.WriteLine("PASS xxx");
sendCommand("PASS "+remotePass);
if( !(retValue == 230 || retValue == 202) )
{
cleanup();
throw new IOException(reply.Substring(4));
}
}
logined = true;
Console.WriteLine("Connected to "+remoteHost);
chdir(remotePath);
}
/// <summary>
/// 设置模式
/// </summary>
/// <param name="mode">模式</param>
/// <remarks>mode为True:Binary模式, mode为False:Ascii模式</remarks>
public void setBinaryMode(Boolean mode)
{
if(mode)
{
sendCommand("TYPE I");
}
else
{
sendCommand("TYPE A");
}
if (retValue != 200)
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="remFileName">远程文件名</param>
public void download(string remFileName)
{
download(remFileName,"",false);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="remFileName">远程文件名</param>
/// <param name="resume">摘要标志</param>
public void download(string remFileName,Boolean resume)
{
download(remFileName,"",resume);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="remFileName">远程文件名</param>
/// <param name="locFileName">本地文件名</param>
/// <remarks>本地文件被创建或者覆盖,但是目录必须存在.</remarks>
public void download(string remFileName,string locFileName)
{
download(remFileName,locFileName,false);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="remFileName">远程文件名</param>
/// <param name="locFileName">本地文件名</param>
/// <param name="resume">摘要标志</param>
/// <remarks>本地文件被创建或者覆盖,但是目录必须存在.</remarks>
public void download(string remFileName,string locFileName,Boolean resume)
{
if(!logined)
{
login();
}
setBinaryMode(true);
Console.WriteLine("Downloading file "+remFileName+" from "+remoteHost + "/"+remotePath);
if (locFileName.Equals(""))
{
locFileName = remFileName;
}
if(!File.Exists(locFileName))
{
Stream st = File.Create(locFileName);
st.Close();
}
FileStream output = new
FileStream(locFileName,FileMode.Open);
Socket cSocket = createDataSocket();
long offset = 0;
if(resume)
{
offset = output.Length;
if(offset > 0 )
{
sendCommand("REST "+offset);
if(retValue != 350)
{
//throw new IOException(reply.Substring(4));
//Some servers may not support resuming.
offset = 0;
}
}
if(offset > 0)
{
if(debug)
{
Console.WriteLine("seeking to " + offset);
}
long npos = output.Seek(offset,SeekOrigin.Begin);
Console.WriteLine("new pos="+npos);
}
}
sendCommand("RETR " + remFileName);
if(!(retValue == 150 || retValue == 125 || retValue == 226))
{
throw new IOException(reply.Substring(4));
}
while(true)
{
bytes = cSocket.Receive(buffer, buffer.Length, 0);
output.Write(buffer,0,bytes);
if(bytes <= 0)
{
break;
}
}
output.Close();
if (cSocket.Connected)
{
cSocket.Close();
}
Console.WriteLine("");
readReply();
if( !(retValue == 226 || retValue == 250) )
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="fileName">文件名</param>
public void upload(string fileName)
{
upload(fileName,false);
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="resume">摘要标志</param>
public void upload(string fileName,Boolean resume)
{
if(!logined)
{
login();
}
Socket cSocket = createDataSocket();
long offset=0;
if(resume)
{
try
{
setBinaryMode(true);
offset = getFileSize(fileName);
}
catch(Exception)
{
offset = 0;
}
}
if(offset > 0 )
{
sendCommand("REST " + offset);
if(retValue != 350)
{
//throw new IOException(reply.Substring(4));
//Remote server may not support resuming.
offset = 0;
}
}
sendCommand("STOR "+Path.GetFileName(fileName));
if( !(retValue == 125 || retValue == 150) )
{
throw new IOException(reply.Substring(4));
}
// open input stream to read source file
FileStream input = new
FileStream(fileName,FileMode.Open);
if(offset != 0)
{
if(debug)
{
Console.WriteLine("seeking to " + offset);
}
input.Seek(offset,SeekOrigin.Begin);
}
Console.WriteLine("Uploading file "+fileName+" to "+remotePath);
while ((bytes = input.Read(buffer,0,buffer.Length)) > 0)
{
cSocket.Send(buffer, bytes, 0);
}
input.Close();
Console.WriteLine("");
if (cSocket.Connected)
{
cSocket.Close();
}
readReply();
if( !(retValue == 226 || retValue == 250) )
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 删除远程文件
/// </summary>
/// <param name="fileName">文件名</param>
public void deleteRemoteFile(string fileName)
{
if(!logined)
{
login();
}
sendCommand("DELE "+fileName);
if(retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 重命名远程文件
/// </summary>
/// <param name="oldFileName">原始文件名</param>
/// <param name="newFileName">新文件名</param>
public void renameRemoteFile(string oldFileName,string newFileName)
{
if(!logined)
{
login();
}
sendCommand("RNFR "+oldFileName);
if(retValue != 350)
{
throw new IOException(reply.Substring(4));
}
// known problem
// rnto will not take care of existing file.
// i.e. It will overwrite if newFileName exist
sendCommand("RNTO "+newFileName);
if(retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 创建目录
/// </summary>
/// <param name="dirName">目录名</param>
public void mkdir(string dirName)
{
if(!logined)
{
login();
}
sendCommand("MKD "+dirName);
if(retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 删除目录
/// </summary>
/// <param name="dirName">目录名</param>
public void rmdir(string dirName)
{
if(!logined)
{
login();
}
sendCommand("RMD "+dirName);
if(retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/// <summary>
/// 改变当前工作路径
/// </summary>
/// <param name="dirName">目录名称</param>
public void chdir(string dirName)
{
if(dirName.Equals("."))
{
return;
}
if(!logined)
{
login();
}
sendCommand("CWD "+dirName);
if(retValue != 250)
{
throw new IOException(reply.Substring(4));
}
this.remotePath = dirName;
Console.WriteLine("Current directory is "+remotePath);
}
/// <summary>
/// 关闭Ftp连接
/// </summary>
public void close()
{
if( clientSocket != null )
{
sendCommand("QUIT");
}
cleanup();
Console.WriteLine("Closing");
}
/// <summary>
/// 设置调试模式
/// </summary>
/// <param name="debug">调式模式</param>
public void setDebug(Boolean debug)
{
this.debug = debug;
}
private void readReply()
{
mes = "";
reply = readLine();
retValue = Int32.Parse(reply.Substring(0,3));
}
private void cleanup()
{
if(clientSocket!=null)
{
clientSocket.Close();
clientSocket = null;
}
logined = false;
}
private string readLine()
{
while(true)
{
bytes = clientSocket.Receive(buffer, buffer.Length, 0);
mes += ASCII.GetString(buffer, 0, bytes);
if(bytes < buffer.Length)
{
break;
}
}
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
if(mes.Length > 2)
{
mes = mess[mess.Length-2];
}
else
{
mes = mess[0];
}
if(!mes.Substring(3,1).Equals(" "))
{
return readLine();
}
if(debug)
{
for(int k=0;k < mess.Length-1;k++)
{
Console.WriteLine(mess[k]);
}
}
return mes;
}
private void sendCommand(String command)
{
Byte[] cmdBytes =
Encoding.ASCII.GetBytes((command+"\r\n").ToCharArray());
clientSocket.Send(cmdBytes, cmdBytes.Length, 0);
readReply();
}
private Socket createDataSocket()
{
sendCommand("PASV");
if(retValue != 227)
{
throw new IOException(reply.Substring(4));
}
int index1 = reply.IndexOf('(');
int index2 = reply.IndexOf(')');
string ipData =
reply.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 reply: " +
reply);
}
if (ch == ',' || i+1 == len)
{
try
{
parts[partCount++] = Int32.Parse(buf);
buf="";
}
catch (Exception)
{
throw new IOException("Malformed PASV reply: " +
reply);
}
}
}
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(Dns.Resolve(ipAddress).AddressList[0], port);
try
{
s.Connect(ep);
}
catch(Exception)
{
throw new IOException("Can't connect to remote server");
}
return s;
}
private string getDirName(string mess)
{
string dirName = string.Empty;
Char blank = ' ';
bool flag = false;
int j = 0;
Char[] chars = mess.ToCharArray();
for(int i=0;i<chars.Length;i++)
{
if (!flag)
{
if (blank == chars[i])
flag = true;
}
else
{
if (blank != chars[i])
{
flag = false;
j ++;
}
}
if (j==8)
{
dirName = mess.Substring(i).Replace("\r","");
break;
}
}
return dirName;
}
}
}