JavaScript:
/*
FTPFactory.cs @ 2004
Better view with tab space=4
Written by Jaimon Mathew (jaimonmathew@rediffmail.com)
Rolander,Dan (Dan.Rolander@marriott.com) has modified the download
method to cope with file name with path information. He also
provided the XML comments so that the library provides Intellisense
descriptions.
*/
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
namespace Common
{
///
/// This class provides the functionality for FTP Server connection
/// and related functions.
///
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;
///
/// Default constuctor for FTP Factory class
///
public FTPFactory()
{
remoteHost = "localhost";
remotePath = ".";
remoteUser = null;
remotePass = null;
remotePort = 21;
debug = false;
logined = false;
}
///
/// Sets the name of the FTP server to connect to
///
/// Remote host Name
public void setRemoteHost(string remoteHost)
{
this.remoteHost = remoteHost;
}
///
/// Returns the name of the current FTP server
///
/// Host Name
public string getRemoteHost()
{
return remoteHost;
}
///
/// Sets the port number to use for FTP.
///
/// Port number
public void setRemotePort(int remotePort)
{
this.remotePort = remotePort;
}
///
/// Returns the current port number.
///
/// Current port number
public int getRemotePort()
{
return remotePort;
}
///
/// Sets the remote directory path.
///
/// The remote directory path
public void setRemotePath(string remotePath)
{
this.remotePath = remotePath;
}
///
/// Return the current remote directory path.
///
/// The current remote directory path.
public string getRemotePath()
{
return remotePath;
}
///
/// Sets the user name to use for logging into the remote server.
///
/// Username
public void setRemoteUser(string remoteUser)
{
this.remoteUser = remoteUser;
}
///
/// Sets the password to user for logging into the remote server.
///
/// Password
public void setRemotePass(string remotePass)
{
this.remotePass = remotePass;
}
///
/// Returns a string array containing the remote directory's file list.
///
/// Mask to be used for filteration
/// List of files in string array format
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;
}
///
/// Returns the size of a file.
///
/// Name of the file for which the size is required
/// size in long format
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;
}
///
/// Login to the remote server.
///
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);
}
///
/// Sets the mode for file transfer
///
/// Value of the Mode, if the value of mode is true, set binary mode for downloads, else set Ascii mode.
public void setBinaryMode(Boolean mode)
{
if (mode)
{
sendCommand("TYPE I");
}
else
{
sendCommand("TYPE A");
}
if (retValue != 200)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Download a file to the Assembly's local directory, keeping the same file name.
///
/// File to be downlaoded
public void download(string remFileName)
{
download(remFileName, "", false);
}
///
/// Download a remote file to the Assembly's local directory,
/// keeping the same file name, and set the resume flag.
///
/// File to be downlaoded
/// Flag to set if the resume is managed or not
public void download(string remFileName, Boolean resume)
{
download(remFileName, "", resume);
}
///
/// Download a remote file to a local file name which can include
/// a path. The local file name will be created or overwritten,
/// but the path must exist.
///
/// File to be downlaoded
/// Local file name
public void download(string remFileName, string locFileName)
{
download(remFileName, locFileName, false);
}
///
/// Download a remote file to a local file name which can include
/// a path, and set the resume flag. The local file name will be
/// created or overwritten, but the path must exist.
///
/// File to be downlaoded
/// Local file name
/// Flag stating if it is required to set the resume
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))
{
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));
}
}
///
/// Uploads a file
///
/// File name to be uplaoded
public void upload(string fileName)
{
upload(fileName, false);
}
///
/// Upload a file and set the resume flag.
///
/// File name to be uplaoded
/// Flag to set if the operation needs the resume functionality
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));
}
}
///
/// Deletes a file from the remote FTP server.
///
/// File name to be deleted
public void deleteRemoteFile(string fileName)
{
if (!logined)
{
login();
}
sendCommand("DELE " + fileName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Renames a file on the remote FTP server.
///
/// Old File Name
/// New File Name
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));
}
}
///
/// Creates a directory on the remote FTP server.
///
/// Name of the directory
public void mkdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("MKD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Deletes a directory on the remote FTP server.
///
/// Removes the directory
public void rmdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("RMD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Change the current working directory on the remote FTP server.
///
/// New directory Name
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);
}
///
/// Close the FTP connection.
///
public void close()
{
if (clientSocket != null)
{
sendCommand("QUIT");
}
cleanup();
Console.WriteLine("Closing...");
}
///
/// Set debug mode.
///
///
public void setDebug(Boolean debug)
{
this.debug = debug;
}
// Reads a reply from the server
private void readReply()
{
mes = "";
reply = readLine();
retValue = Int32.Parse(reply.Substring(0, 3));
}
// Clean up the socket connections
private void cleanup()
{
if (clientSocket != null)
{
clientSocket.Close();
clientSocket = null;
}
logined = false;
}
// Read line
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;
}
}
}use of http://www.codeproject.com/Articles/31624/An-FTP-secure-client-library-for-C