using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
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;
public FTPFactory()
{
remoteHost = "localhost";
remotePath = ".";
remoteUser = "anonymous";
remotePass = "[email protected]";
remotePort = 21;
debug = false;
logined = false;
}
public void setRemoteHost(string remoteHost)
{
this.remoteHost = remoteHost;
}
public string getRemoteHost()
{
return remoteHost;
}
public void setRemotePort(int remotePort)
{
this.remotePort = remotePort;
}
public int getRemotePort()
{
return remotePort;
}
public void setRemotePath(string remotePath)
{
this.remotePath = remotePath;
}
public string getRemotePath()
{
return remotePath;
}
public void setRemoteUser(string remoteUser)
{
this.remoteUser = remoteUser;
}
public void setRemotePass(string remotePass)
{
this.remotePass = remotePass;
}
public string[] getFileList(string mask)
{
if (!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("NLST " + mask);
if (!(retValue == 150 || retValue == 125))
{
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();
readReply();
if (retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return mess;
}
public long getFileSize(string fileName)
{
if (!logined)
{
login();
}
sendCommand("SIZE " + fileName);
long size = 0;
if (retValue == 213)
{
size = reply.Substring(4).ToInt64();
}
else
{
throw new IOException(reply.Substring(4));
}
return size;
}
public void login()
{
clientSocket = new Socket(AddressFamily.AfINet, SocketType.SockStream, ProtocolType.ProtTCP);
IPEndPoint ep = new IPEndPoint(DNS.Resolve(remoteHost), remotePort);
int i = clientSocket.Connect(ep);
if (i != 0)
{
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);
}
public void setBinaryMode(Boolean mode)
{
if (mode)
{
sendCommand("TYPE I");
}
else
{
sendCommand("TYPE A");
}
if (retValue != 200)
{
throw new IOException(reply.Substring(4));
}
}
public void download(string fileName)
{
download(fileName, false);
}
public void download(string fileName, Boolean resume)
{
if (!logined)
{
login();
}
setBinaryMode(true);
long totalSize = 0;
try
{
totalSize = getFileSize(fileName);
}
catch (Exception)
{
throw new Exception("File Not Found " + fileName);
}
Console.WriteLine("Downloading file " + fileName + " from " + remoteHost + "/" + remotePath);
if (!File.FileExists(fileName))
{
Stream st = File.Create(fileName);
st.Close();
}
FileStream output = new FileStream(fileName, 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));
//Server 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 " + fileName);
if (!(retValue == 150 || retValue == 125))
{
throw new IOException(reply.Substring(4));
}
float iCnt = 0;
float per = 0, oldPer = 1;
while (true)
{
bytes = cSocket.Receive(buffer, buffer.Length, 0);
output.Write(buffer, 0, bytes);
// Showing the progress. 1..50
iCnt += bytes;
per = (int)((iCnt / totalSize) * 100);
if (per != oldPer && per % 2 == 0)
{
Console.Write(".");
oldPer = per;
}
if (bytes < buffer.Length)
{
break;
}
}
output.Close();
cSocket.Close();
Console.WriteLine("");
readReply();
if (!(retValue == 226 || retValue == 250))
{
throw new IOException(reply.Substring(4));
}
}
public void upload(string fileName)
{
upload(fileName, false);
}
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 " + 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);
}
//for progress bar
long totalSize = input.Length - offset;
float iCnt = 0;
int per = 0, oldPer = 1;
Console.WriteLine("Uploading file " + fileName + " to " + remotePath);
while ((bytes = input.Read(buffer, 0, buffer.Length)) > 0)
{
cSocket.Send(buffer, bytes, 0);
// Showing the progress. 1..50
iCnt += bytes;
per = (int)((iCnt / totalSize) * 100);
if (per != oldPer && per % 2 == 0)
{
Console.Write(".");
oldPer = per;
}
}
input.Close();
Console.WriteLine("");
cSocket.Close();
readReply();
if (!(retValue == 226 || retValue == 250))
{
throw new IOException(reply.Substring(4));
}
}
public void deleteRemoteFile(string fileName)
{
if (!logined)
{
login();
}
sendCommand("DELE " + fileName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
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));
}
}
public void mkdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("MKD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
public void rmdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("RMD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
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);
}
public void close()
{
if (clientSocket != null)
{
sendCommand("QUIT");
}
cleanup();
Console.WriteLine("Closing...");
}
public void setDebug(Boolean debug)
{
this.debug = debug;
}
private void readReply()
{
mes = "";
reply = readLine();
retValue = reply.Substring(0, 3).ToInt32();
}
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 = ipData.Substring(i, 1).ToChar();
if (Char.IsDigit(ch))
buf += ch;
else if (ch != ',')
{
throw new IOException("Malformed PASV reply: " + reply);
}
if (ch == ',' || i + 1 == len)
{
try
{
parts[partCount++] = buf.ToInt32();
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.AfINet, SocketType.SockStream, ProtocolType.ProtTCP);
IPEndPoint ep = new IPEndPoint(DNS.Resolve(ipAddress), port);
int sucess = s.Connect(ep);
if (sucess != 0)
{
throw new IOException("Can't connect to remote server");
}
return s;
}
}
}
public class Test
{
public static void Main()
{
try
{
Console.WriteLine("Starting...");
FTPFactory ff = new FTPFactory();
ff.setDebug(true);
ff.setRemoteHost("192.168.10.19");
ff.setRemoteUser("jaimon");
ff.setRemotePass("mathew");
ff.login();
string[] fileNames = ff.getFileList("*.*");
for (int i = 0; i < fileNames.Length; i++)
{
Console.WriteLine(fileNames[i]);
}
ff.download("Readme.zip", true);
ff.close();
}
catch (Exception e)
{
Console.WriteLine("Caught Error :" + e.Message);
}
}
}
