FTP通讯封装
一天，一时，一分，一秒，最近时间的概念离我越来越远，也许是工作太充实了，或许是自己真的老了！前两天编写 有关FTP 的东西，感觉还行。
//===============================================
// Data:2008
//===============================================
using System;
using System.Configuration;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace WindowsApplication3
{
public class FtpHelper
{
#region 成员变量
//static readonly log4net.ILog log = log4net.LogManager.GetLogger("log4net");
private string remoteHost, remotePath, remoteUser, remotePass, mes;
private int remotePort = 21, bytes;
private Socket clientSocket;
private int retValue;
private Boolean debug;
private Boolean logined;
private string reply;
private static int BLOCK_SIZE = 512;
private Byte[] buffer = new Byte;
private Encoding ASCII = Encoding.ASCII;
// FTP当前处理信息事件
public delegate void FTPProcessInfoEventHandler(string msg);
public event FTPProcessInfoEventHandler SetProcessInfoEvent;
#endregion
#region 构造方法
public FtpHelper()
{
//string FTPRemoteIP = ConfigurationSettings.AppSettings["FTPRemoteIP"];
//int FTPRemotePort = Convert.ToInt32(ConfigurationSettings.AppSettings["FTPRemotePort"]);
//string FTPUser = ConfigurationSettings.AppSettings["FTPUser"];
//string FTPPassword = ConfigurationSettings.AppSettings["FTPPassword"];
//remoteHost = FTPRemoteIP;
remotePath = ".";
//remoteUser = FTPUser;
//remotePass = FTPPassword;
//remotePort = FTPRemotePort;
debug = false;
logined = false;
}
#endregion
#region 基本信息设置
/**////
/// Set the name of the FTP server to connect to.
///
/// Server name
public void setRemoteHost(string remoteHost)
{
this.remoteHost = remoteHost;
}
/**////
/// Return the name of the current FTP server.
///
/// Server name
public string getRemoteHost()
{
return remoteHost;
}
/**////
/// Set the port number to use for FTP.
///
/// Port number
public void setRemotePort(int remotePort)
{
this.remotePort = remotePort;
}
/**////
/// Return the current port number.
///
/// Current port number
public int getRemotePort()
{
return remotePort;
}
/**////
/// Set 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;
}
/**////
/// Set the user name to use for logging into the remote server.
///
/// Username
public void setRemoteUser(string remoteUser)
{
this.remoteUser = remoteUser;
}
/**////
/// Set the password to user for logging into the remote server.
///
/// Password
public void setRemotePass(string remotePass)
{
this.remotePass = remotePass;
}
#endregion
#region 属性
/**////
/// 是否登录成功
///
public bool GetLogin
{
get
{
return this.logined;
}
}
#endregion
#region 功能操作
/**////
/// Return a string array containing the remote directory's file list.
///
///
///
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 = "";
Thread.Sleep(700);
while (true)
{
if (cSocket.Connected)
{
int bytes = cSocket.Receive(buffer, buffer.Length, 0);
mes += ASCII.GetString(buffer, 0, bytes);
if (bytes < buffer.Length)
{
break;
}
}
else
{
this.SetProcessInfoText("socket 连接已断！");
//log.Info("socket 连接断了！");
}
}
//log.Info(mes);
char[] seperator = { '\n' };
string[] mess = mes.Split(seperator);
//foreach(string fileName in mess)
//{
//log.Info(fileName);
//}
cSocket.Close();
readReply();
if (retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return mess;
}
public string[] getFileList()
{
if (!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("LIST ");
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;
}
}
//log.Info(mes);
char[] seperator = { '\n' };
string[] mess = mes.Split(seperator);
cSocket.Close();
readReply();
if (retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return mess;
}
/**////
/// Return the size of a file.
///
///
///
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()
{
this.SetProcessInfoText("连接中");
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(Dns.Resolve(remoteHost).AddressList, remotePort);
try
{
clientSocket.Connect(ep);
}
catch (Exception)
{
this.SetProcessInfoText("连接失败！");
// throw new IOException("Couldn't connect to remote server");
}
try
{
readReply();
if (retValue != 220)
{
close();
// throw new IOException(reply.Substring(4));
}
if (debug)
Console.WriteLine("USER " + remoteUser);
this.SetProcessInfoText("检测用户名！");
sendCommand("USER " + remoteUser);
if (!(retValue == 331 || retValue == 230))
{
this.SetProcessInfoText("检测用户名失败！");
cleanup();
// throw new IOException(reply.Substring(4));
}
if (retValue != 230)
{
if (debug)
Console.WriteLine("PASS xxx");
this.SetProcessInfoText("检测用户密码！");
sendCommand("PASS " + remotePass);
if (!(retValue == 230 || retValue == 202))
{
this.SetProcessInfoText("检测用户密码失败！");
cleanup();
// throw new IOException(reply.Substring(4));
}
}
logined = true;
// Console.WriteLine("Connected to " + remoteHost);
this.SetProcessInfoText("连接成功！");
chdir(remotePath);
}
catch (Exception)
{
this.SetProcessInfoText("连接失败！");
// throw new IOException("Couldn't connect to remote server");
}
}
/**////
/// 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.
///
///
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.
///
///
///
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.
///
///
///
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.
///
///
///
///
public void download(string remFileName, string locFileName, Boolean resume)
{
if (!logined)
{
login();
}
setBinaryMode(false);
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.Create);
Socket cSocket = createDataSocket();
long offset = 0;
if (resume)
{
offset = output.Length;
if (offset > 0)
{
setBinaryMode(false);
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 (bytes0)
{
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));
}
}
/**////
/// Delete a file from the remote FTP server.
///
///
public void deleteRemoteFile(string fileName)
{
if (!logined)
{
login();
}
sendCommand("DELE " + fileName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/**////
/// Rename a file on the remote FTP server.
///
///
///
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));
}
}
/**////
/// Create a directory on the remote FTP server.
///
///
public void mkdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("MKD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
/**////
/// Delete a directory on the remote FTP server.
///
///
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.
///
///
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;
}
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;
}
else
{
mes = mess;
}
if (!mes.Substring(3, 1).Equals(" "))
{
return readLine();
}
if (debug)
{
for (int k = 0; k < mess.Length - 1; k++)
{
Console.WriteLine(mess);
}
}
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;
int len = ipData.Length;
int partCount = 0;
string buf = "";
for (int i = 0; i < len && partCount
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