.NET中完成FTP各功能操作

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1.FTP工厂类

usingSystem;
usingSystem.Configuration;
usingSystem.IO;
usingSystem.Net;
usingSystem.Net.Sockets;
usingSystem.Text;
usingSystem.Threading;

namespaceSchool.Common
{
/**////<summary>
///类编号：0043
///类名称：FTPFactory
///内容摘要：FTP工厂，完成FTP各功能操作
///完成日期：2007-1-1210:38:36
///编码作者：林付国
///</summary>
publicclassFTPFactory
{
成员变量#region成员变量

//staticreadonlylog4net.ILoglog=log4net.LogManager.GetLogger("log4net");
privatestringremoteHost,remotePath,remoteUser,remotePass,mes;
privateintremotePort=21,bytes;
privateSocketclientSocket;
privateintretValue;
privateBooleandebug;
privateBooleanlogined;
privatestringreply;

privatestaticintBLOCK_SIZE=512;
privateByte[]buffer=newByte[BLOCK_SIZE];
privateEncodingASCII=Encoding.ASCII;
//FTP当前处理信息事件
publiceventFTPProcessInfoEventHandlerSetProcessInfoEvent;
#endregion

构造方法#region构造方法

publicFTPFactory()
{
//stringFTPRemoteIP=ConfigurationSettings.AppSettings["FTPRemoteIP"];
//intFTPRemotePort=Convert.ToInt32(ConfigurationSettings.AppSettings["FTPRemotePort"]);
//stringFTPUser=ConfigurationSettings.AppSettings["FTPUser"];
//stringFTPPassword=ConfigurationSettings.AppSettings["FTPPassword"];

//remoteHost=FTPRemoteIP;
remotePath=".";
//remoteUser=FTPUser;
//remotePass=FTPPassword;
//remotePort=FTPRemotePort;

debug=false;
logined=false;
}

#endregion

基本信息设置#region基本信息设置

/**////
///SetthenameoftheFTPservertoconnectto.
///
///Servername
publicvoidsetRemoteHost(stringremoteHost)
{
this.remoteHost=remoteHost;
}

/**////
///ReturnthenameofthecurrentFTPserver.
///
///Servername
publicstringgetRemoteHost()
{
returnremoteHost;
}

/**////
///SettheportnumbertouseforFTP.
///
///Portnumber
publicvoidsetRemotePort(intremotePort)
{
this.remotePort=remotePort;
}

/**////
///Returnthecurrentportnumber.
///
///Currentportnumber
publicintgetRemotePort()
{
returnremotePort;
}

/**////
///Settheremotedirectorypath.
///
///Theremotedirectorypath
publicvoidsetRemotePath(stringremotePath)
{
this.remotePath=remotePath;
}

/**////
///Returnthecurrentremotedirectorypath.
///
///Thecurrentremotedirectorypath.
publicstringgetRemotePath()
{
returnremotePath;
}

/**////
///Settheusernametouseforloggingintotheremoteserver.
///
///Username
publicvoidsetRemoteUser(stringremoteUser)
{
this.remoteUser=remoteUser;
}

/**////
///Setthepasswordtouserforloggingintotheremoteserver.
///
///Password
publicvoidsetRemotePass(stringremotePass)
{
this.remotePass=remotePass;
}

#endregion

属性#region属性
/**////<summary>
///是否登录成功
///</summary>
publicboolGetLogin
{
get
{
returnthis.logined;
}
}

#endregion

功能操作#region功能操作

/**////
///Returnastringarraycontainingtheremotedirectory'sfilelist.
///
///
///
publicstring[]getFileList(stringmask)
{
if(!logined)
{
login();
}

SocketcSocket=createDataSocket();

sendCommand("NLST"+mask);

if(!(retValue==150||retValue==125))
{
thrownewIOException(reply.Substring(4));
}

mes="";
Thread.Sleep(700);

while(true)
{
if(cSocket.Connected)
{
intbytes=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(stringfileNameinmess)
//{
//log.Info(fileName);
//}

cSocket.Close();
readReply();

if(retValue!=226)
{
thrownewIOException(reply.Substring(4));
}
returnmess;
}

publicstring[]getFileList()
{
if(!logined)
{
login();
}

SocketcSocket=createDataSocket();

sendCommand("LIST");

if(!(retValue==150||retValue==125))
{
thrownewIOException(reply.Substring(4));
}

mes="";

while(true)
{
intbytes=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)
{
thrownewIOException(reply.Substring(4));
}

returnmess;
}

/**////
///Returnthesizeofafile.
///
///
///
publiclonggetFileSize(stringfileName)
{
if(!logined)
{
login();
}

sendCommand("SIZE"+fileName);

longsize=0;

if(retValue==213)
{
size=Int64.Parse(reply.Substring(4));
}
else
{
thrownewIOException(reply.Substring(4));
}

returnsize;
}

/**////
///Logintotheremoteserver.
///
publicvoidlogin()
{
this.SetProcessInfoText("连接中");

clientSocket=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);

IPEndPointep=newIPEndPoint(Dns.Resolve(remoteHost).AddressList[0],remotePort);

try
{
clientSocket.Connect(ep);
}
catch(Exception)
{
this.SetProcessInfoText("连接失败！");
//thrownewIOException("Couldn'tconnecttoremoteserver");
}

try
{
readReply();

if(retValue!=220)
{
close();
//thrownewIOException(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();
//thrownewIOException(reply.Substring(4));
}

if(retValue!=230)
{
if(debug)
Console.WriteLine("PASSxxx");

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();
//thrownewIOException(reply.Substring(4));
}
}

logined=true;
//Console.WriteLine("Connectedto"+remoteHost);
this.SetProcessInfoText("连接成功！");

chdir(remotePath);
}
catch(Exception)
{
this.SetProcessInfoText("连接失败！");
//thrownewIOException("Couldn'tconnecttoremoteserver");
}
}

/**////
///Ifthevalueofmodeistrue,setbinarymodefordownloads.
///Else,setAsciimode.
///
///
publicvoidsetBinaryMode(Booleanmode)
{
if(mode)
{
sendCommand("TYPEI");
}
else
{
sendCommand("TYPEA");
}
if(retValue!=200)
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///DownloadafiletotheAssembly'slocaldirectory,
///keepingthesamefilename.
///
///
publicvoiddownload(stringremFileName)
{
download(remFileName,"",false);
}

/**////
///DownloadaremotefiletotheAssembly'slocaldirectory,
///keepingthesamefilename,andsettheresumeflag.
///
///
///
publicvoiddownload(stringremFileName,Booleanresume)
{
download(remFileName,"",resume);
}

/**////
///Downloadaremotefiletoalocalfilenamewhichcaninclude
///apath.Thelocalfilenamewillbecreatedoroverwritten,
///butthepathmustexist.
///
///
///
publicvoiddownload(stringremFileName,stringlocFileName)
{
download(remFileName,locFileName,false);
}

/**////
///Downloadaremotefiletoalocalfilenamewhichcaninclude
///apath,andsettheresumeflag.Thelocalfilenamewillbe
///createdoroverwritten,butthepathmustexist.
///
///
///
///
publicvoiddownload(stringremFileName,stringlocFileName,Booleanresume)
{
if(!logined)
{
login();
}
setBinaryMode(false);

Console.WriteLine("Downloadingfile"+remFileName+"from"+remoteHost+"//"+remotePath);

if(locFileName.Equals(""))
{
locFileName=remFileName;
}

if(!File.Exists(locFileName))
{
Streamst=File.Create(locFileName);
st.Close();
}

FileStreamoutput=newFileStream(locFileName,FileMode.Create);
SocketcSocket=createDataSocket();
longoffset=0;

if(resume)
{
offset=output.Length;
if(offset>0)
{
setBinaryMode(false);
sendCommand("REST"+offset);
if(retValue!=350)
{
//thrownewIOException(reply.Substring(4));
//Someserversmaynotsupportresuming.
offset=0;
}
}

if(offset>0)
{
if(debug)
{
Console.WriteLine("seekingto"+offset);
}
longnpos=output.Seek(offset,SeekOrigin.Begin);
Console.WriteLine("newpos="+npos);
}
}

sendCommand("RETR"+remFileName);

if(!(retValue==150||retValue==125))
{
thrownewIOException(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))
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///Uploadafile.
///
///
publicvoidupload(stringfileName)
{
upload(fileName,false);
}

/**////
///Uploadafileandsettheresumeflag.
///
///
///
publicvoidupload(stringfileName,Booleanresume)
{
if(!logined)
{
login();
}
SocketcSocket=createDataSocket();
longoffset=0;

if(resume)
{
try
{
setBinaryMode(true);
offset=getFileSize(fileName);
}
catch(Exception)
{
offset=0;
}
}

if(offset>0)
{
sendCommand("REST"+offset);
if(retValue!=350)
{
//thrownewIOException(reply.Substring(4));
//Remoteservermaynotsupportresuming.
offset=0;
}
}

/**//*==========================*/
sendCommand("STOR"+Path.GetFileName(fileName));
if(!(retValue==125||retValue==150))
{
thrownewIOException(reply.Substring(4));
}

//openinputstreamtoreadsourcefile
FileStreaminput=newFileStream(fileName,FileMode.Open);

if(offset!=0)
{
if(debug)
{
Console.WriteLine("seekingto"+offset);
}
input.Seek(offset,SeekOrigin.Begin);
}

Console.WriteLine("Uploadingfile"+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))
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///DeleteafilefromtheremoteFTPserver.
///
///
publicvoiddeleteRemoteFile(stringfileName)
{
if(!logined)
{
login();
}
sendCommand("DELE"+fileName);

if(retValue!=250)
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///RenameafileontheremoteFTPserver.
///
///
///
publicvoidrenameRemoteFile(stringoldFileName,stringnewFileName)
{
if(!logined)
{
login();
}
sendCommand("RNFR"+oldFileName);

if(retValue!=350)
{
thrownewIOException(reply.Substring(4));
}
//knownproblem
//rntowillnottakecareofexistingfile.
//i.e.ItwilloverwriteifnewFileNameexist
sendCommand("RNTO"+newFileName);

if(retValue!=250)
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///CreateadirectoryontheremoteFTPserver.
///
///
publicvoidmkdir(stringdirName)
{
if(!logined)
{
login();
}
sendCommand("MKD"+dirName);

if(retValue!=250)
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///DeleteadirectoryontheremoteFTPserver.
///
///
publicvoidrmdir(stringdirName)
{
if(!logined)
{
login();
}

sendCommand("RMD"+dirName);

if(retValue!=250)
{
thrownewIOException(reply.Substring(4));
}
}

/**////
///ChangethecurrentworkingdirectoryontheremoteFTPserver.
///
///
publicvoidchdir(stringdirName)
{
if(dirName.Equals("."))
{
return;
}
if(!logined)
{
login();
}
sendCommand("CWD"+dirName);

if(retValue!=250)
{
thrownewIOException(reply.Substring(4));
}

this.remotePath=dirName;
Console.WriteLine("Currentdirectoryis"+remotePath);
}

/**////
///ClosetheFTPconnection.
///
publicvoidclose()
{
if(clientSocket!=null)
{
sendCommand("QUIT");
}
cleanup();
Console.WriteLine("Closing");
}

/**////
///Setdebugmode.
///
///
publicvoidsetDebug(Booleandebug)
{
this.debug=debug;
}

privatevoidreadReply()
{
mes="";
reply=readLine();
retValue=Int32.Parse(reply.Substring(0,3));
}

privatevoidcleanup()
{
if(clientSocket!=null)
{
clientSocket.Close();
clientSocket=null;
}
logined=false;
}

privatestringreadLine()
{
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(""))
{
returnreadLine();
}

if(debug)
{
for(intk=0;k<mess.Length-1;k++)
{
Console.WriteLine(mess[k]);
}
}
returnmes;
}

privatevoidsendCommand(Stringcommand)
{
Byte[]cmdBytes=Encoding.ASCII.GetBytes((command+"/r/n").ToCharArray());
clientSocket.Send(cmdBytes,cmdBytes.Length,0);
readReply();
}

privateSocketcreateDataSocket()
{
sendCommand("PASV");
if(retValue!=227)
{
thrownewIOException(reply.Substring(4));
}

intindex1=reply.IndexOf('(');
intindex2=reply.IndexOf(')');
stringipData=reply.Substring(index1+1,index2-index1-1);
int[]parts=newint[6];
intlen=ipData.Length;
intpartCount=0;
stringbuf="";

for(inti=0;i<len&&partCount<=6;i++)
{
charch=Char.Parse(ipData.Substring(i,1));
if(Char.IsDigit(ch))
buf+=ch;
elseif(ch!=',')
{
thrownewIOException("MalformedPASVreply:"+reply);
}
if(ch==','||i+1==len)
{
try
{
parts[partCount++]=Int32.Parse(buf);
buf="";
}
catch(Exception)
{
thrownewIOException("MalformedPASVreply:"+reply);
}
}
}

stringipAddress=parts[0]+"."+parts[1]+"."+parts[2]+"."+parts[3];
intport=(parts[4]<<8)+parts[5];

Sockets=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
s.SetSocketOption(SocketOptionLevel.Socket,SocketOptionName.SendTimeout,5000);

IPEndPointep=newIPEndPoint(Dns.Resolve(ipAddress).AddressList[0],port);

try
{
s.Connect(ep);
}
catch(Exception)
{
thrownewIOException("Can'tconnecttoremoteserver");
}
returns;
}

#endregion

信息输出方法#region信息输出方法

privatevoidSetProcessInfoText(stringstr)
{
try
{
if(this.SetProcessInfoEvent!=null)
{
this.SetProcessInfoEvent(str);
}
}
catch(Exceptionerr)
{
throw(err);
}
}

#endregion
}
}

2.调用方法

//检查此FTP是否可用
FTPFactoryftp=newFTPFactory();
ftp.setRemoteHost(主机名);
ftp.setRemoteUser(用户名);
ftp.setRemotePass(密码);
ftp.setRemotePort(端口);
ftp.setRemotePath(路径);

ftp.login();

if(!ftp.GetLogin)
{
　　　　　　　　　　　　　　//　提示连接失败
this.Cursor=Cursors.Default;
return;
}
ftp.close();