using System;
using SystemNet;
using SystemNetSockets;
using SystemText;
using SystemIO;
namespace JySoftSaleFrameFacade
{
/// <summary>
/// FTP 的摘要说明。
/// </summary>
public class FTPServer
{
private string strRemoteHost;
private int strRemotePort;
private string strRemotePath;
private string strRemoteUser;
private string strRemotePass;
private Boolean bConnected;
#region 内部变量
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strMsg;
/// <summary>
/// 服务器返回的应答信息(包含应答码)
/// </summary>
private string strReply;
/// <summary>
/// 服务器返回的应答码
/// </summary>
private int iReplyCode;
/// <summary>
/// 进行控制连接的socket
/// </summary>
private Socket socketControl;
/// <summary>
/// 传输模式
/// </summary>
private TransferType trType;
/// <summary>
/// 传输模式:二进制类型、ASCII类型
/// </summary>
public enum TransferType
{
/// <summary>
/// Binary
/// </summary>
Binary,
/// <summary>
/// ASCII
/// </summary>
ASCII
};
/// <summary>
/// 接收和发送数据的缓冲区
/// </summary>
private static int BLOCK_SIZE = 512;
Byte[] buffer = new Byte[ BLOCK_SIZE];
/// <summary>
/// 编码方式
/// </summary>
Encoding ASCII = EncodingDefault;
#endregion
#region 内部函数
#region 构造函数
/// <summary>
/// 缺省构造函数
/// </summary>
public FTPServer()
{
strRemoteHost = "";
strRemotePath = "";
strRemoteUser = "";
strRemotePass = "";
strRemotePort = 21;
bConnected = false;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="remoteHost"></param>
/// <param name="remotePath"></param>
/// <param name="remoteUser"></param>
/// <param name="remotePass"></param>
/// <param name="remotePort"></param>
public FTPServer( string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort )
{
strRemoteHost = remoteHost;
strRemotePath = remotePath;
strRemoteUser = remoteUser;
strRemotePass = remotePass;
strRemotePort = remotePort;
Connect();
}
#endregion
#region 登陆
/// <summary>
/// FTP服务器IP地址
/// </summary>
public string RemoteHost
{
get
{
return strRemoteHost;
}
set
{
strRemoteHost = value;
}
}
/// <summary>
/// FTP服务器端口
/// </summary>
public int RemotePort
{
get
{
return strRemotePort;
}
set
{
strRemotePort = value;
}
}
/// <summary>
/// 当前服务器目录
/// </summary>
public string RemotePath
{
get
{
return strRemotePath;
}
set
{
strRemotePath = value;
}
}
/// <summary>
/// 登录用户账号
/// </summary>
public string RemoteUser
{
set
{
strRemoteUser = value;
}
}
/// <summary>
/// 用户登录密码
/// </summary>
public string RemotePass
{
set
{
strRemotePass = value;
}
}
/// <summary>
/// 是否登录
/// </summary>
public bool Connected
{
get
{
return bConnected;
}
}
#endregion
#region 链接
/// <summary>
/// 建立连接
/// </summary>
public void Connect()
{
socketControl = new Socket(AddressFamilyInterNetwork,SocketTypeStream,ProtocolTypeTcp);
IPEndPoint ep = new IPEndPoint(IPAddressParse(RemoteHost), strRemotePort);
// 链接
try
{
socketControlConnect(ep);
}
catch(Exception)
{
throw new IOException("连接不上FTP服务器！");
}
// 获取应答码
ReadReply();
if(iReplyCode != 220)
{
DisConnect();
throw new IOException(strReplySubstring(4));
}
try
{
// 登陆
SendCommand("USER "+strRemoteUser);
if( !(iReplyCode == 331 || iReplyCode == 230) )
{
CloseSocketConnect();//关闭连接
throw new IOException(strReplySubstring(4));
}
if( iReplyCode != 230 )
{
SendCommand("PASS "+strRemotePass);
if( !(iReplyCode == 230 || iReplyCode == 202) )
{
CloseSocketConnect();//关闭连接
throw new IOException(strReplySubstring(4));
}
}
}
catch
{
throw new IOException("登录用户名密码错误!");
}
bConnected = true;
// 切换到目录
ChDir(strRemotePath);
}
/// <summary>
/// 关闭连接
/// </summary>
public void DisConnect()
{
if( socketControl != null )
{
SendCommand("QUIT");
}
CloseSocketConnect();
}
#endregion
#region 传输模式
/// <summary>
/// 设置传输模式
/// </summary>
/// <param name="ttType">传输模式</param>
public void SetTransferType(TransferType ttType)
{
if(ttType == TransferTypeBinary)
{
SendCommand("TYPE I");//binary类型传输
}
else
{
SendCommand("TYPE A");//ASCII类型传输
}
if (iReplyCode != 200)
{
throw new IOException(strReplySubstring(4));
}
else
{
trType = ttType;
}
}
/// <summary>
/// 获得传输模式
/// </summary>
/// <returns>传输模式</returns>
public TransferType GetTransferType()
{
return trType;
}
#endregion
#region 文件 *** 作
/// <summary>
/// 获得文件列表
/// </summary>
/// <param name="strMask">文件名的匹配字符串</param>
/// <returns></returns>
public string[] Dir(string strMask)
{
// 建立链接
if(!bConnected)
{
Connect();
}
//建立进行数据连接的socket
Socket socketData = CreateDataSocket();
//传送命令
SendCommand("NLST " + strMask);
//分析应答代码
if(!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226))
{
return null;
}
//获得结果
strMsg = "";
while(true)
{
int iBytes = socketDataReceive(buffer, bufferLength, 0);
strMsg += ASCIIGetString(buffer, 0, iBytes);
if(iBytes < bufferLength)
{
break;
}
}
char[] seperator = {'\n'};
string[] strsFileList = strMsgSplit(seperator);
socketDataClose();//数据socket关闭时也会有返回码
if(iReplyCode != 226)
{
ReadReply();
if(iReplyCode != 226)
{
throw new IOException(strReplySubstring(4));
}
}
return strsFileList;
}
/// <summary>
/// 获取文件大小
/// </summary>
/// <param name="strFileName">文件名</param>
/// <returns>文件大小</returns>
private long GetFileSize(string strFileName)
{
if(!bConnected)
{
Connect();
}
SendCommand("SIZE " + PathGetFileName(strFileName));
long lSize=0;
if(iReplyCode == 213)
{
lSize = Int64Parse(strReplySubstring(4));
}
else
{
throw new IOException(strReplySubstring(4));
}
return lSize;
}
/// <summary>
/// 删除
/// </summary>
/// <param name="strFileName">待删除文件名</param>
public void Delete(string strFileName)
{
if(!bConnected)
{
Connect();
}
SendCommand("DELE "+strFileName);
if(iReplyCode != 250)
{
throw new IOException(strReplySubstring(4));
}
}
/// <summary>
/// 重命名(如果新文件名与已有文件重名,将覆盖已有文件)
/// </summary>
/// <param name="strOldFileName">旧文件名</param>
/// <param name="strNewFileName">新文件名</param>
public void Rename(string strOldFileName,string strNewFileName)
{
if(!bConnected)
{
Connect();
}
SendCommand("RNFR "+strOldFileName);
if(iReplyCode != 350)
{
throw new IOException(strReplySubstring(4));
}
// 如果新文件名与原有文件重名,将覆盖原有文件
SendCommand("RNTO "+strNewFileName);
if(iReplyCode != 250)
{
throw new IOException(strReplySubstring(4));
}
}
#endregion
#region 上传和下载
/// <summary>
/// 下载一批文件
/// </summary>
/// <param name="strFileNameMask">文件名的匹配字符串</param>
/// <param name="strFolder">本地目录(不得以\结束)</param>
public void Get(string strFileNameMask,string strFolder)
{
if(!bConnected)
{
Connect();
}
string[] strFiles = Dir(strFileNameMask);
foreach(string strFile in strFiles)
{
if(!strFileEquals(""))//一般来说strFiles的最后一个元素可能是空字符串
{
Get(strFile,strFolder,strFile);
}
}
}
/// <summary>
/// 下载一个文件
/// </summary>
/// <param name="strRemoteFileName">要下载的文件名</param>
/// <param name="strFolder">本地目录(不得以\结束)</param>
/// <param name="strLocalFileName">保存在本地时的文件名</param>
public void Get(string strRemoteFileName,string strFolder,string strLocalFileName)
{
if(!bConnected)
{
Connect();
}
SetTransferType(TransferTypeBinary);
if (strLocalFileNameEquals(""))
{
strLocalFileName = strRemoteFileName;
}
if(!FileExists(strLocalFileName))
{
Stream st = FileCreate(strLocalFileName);
stClose();
}
FileStream output = new
FileStream(strFolder + "\\" + strLocalFileName,FileModeCreate);
Socket socketData = CreateDataSocket();
SendCommand("RETR " + strRemoteFileName);
if(!(iReplyCode == 150 || iReplyCode == 125
|| iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReplySubstring(4));
}
while(true)
{
int iBytes = socketDataReceive(buffer, bufferLength, 0);
outputWrite(buffer,0,iBytes);
if(iBytes <= 0)
{
break;
}
}
outputClose();
if (socketDataConnected)
{
socketDataClose();
}
if(!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if(!(iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReplySubstring(4));
}
}
}
/// <summary>
/// 上传一批文件
/// </summary>
/// <param name="strFolder">本地目录(不得以\结束)</param>
/// <param name="strFileNameMask">文件名匹配字符(可以包含和)</param>
public void Put(string strFolder,string strFileNameMask)
{
string[] strFiles = DirectoryGetFiles(strFolder,strFileNameMask);
foreach(string strFile in strFiles)
{
//strFile是完整的文件名(包含路径)
Put(strFile);
}
}
/// <summary>
/// 上传一个文件
/// </summary>
/// <param name="strFileName">本地文件名</param>
public void Put(string strFileName)
{
if(!bConnected)
{
Connect();
}
Socket socketData = CreateDataSocket();
SendCommand("STOR "+PathGetFileName(strFileName));
if( !(iReplyCode == 125 || iReplyCode == 150) )
{
throw new IOException(strReplySubstring(4));
}
FileStream input = new
FileStream(strFileName,FileModeOpen);
int iBytes = 0;
while ((iBytes = inputRead(buffer,0,bufferLength)) > 0)
{
socketDataSend(buffer, iBytes, 0);
}
inputClose();
if (socketDataConnected)
{
socketDataClose();
}
if(!(iReplyCode == 226 || iReplyCode == 250))
{
ReadReply();
if(!(iReplyCode == 226 || iReplyCode == 250))
{
throw new IOException(strReplySubstring(4));
}
}
}
#endregion
#region 目录 *** 作
/// <summary>
/// 创建目录
/// </summary>
/// <param name="strDirName">目录名</param>
public void MkDir(string strDirName)
{
if(!bConnected)
{
Connect();
}
SendCommand("MKD "+strDirName);
if(iReplyCode != 257)
{
throw new IOException(strReplySubstring(4));
}
}
/// <summary>
/// 删除目录
/// </summary>
/// <param name="strDirName">目录名</param>
public void RmDir(string strDirName)
{
if(!bConnected)
{
Connect();
}
SendCommand("RMD "+strDirName);
if(iReplyCode != 250)
{
throw new IOException(strReplySubstring(4));
}
}
/// <summary>
/// 改变目录
/// </summary>
/// <param name="strDirName">新的工作目录名</param>
public void ChDir(string strDirName)
{
if(strDirNameEquals("") || strDirNameEquals(""))
{
return;
}
if(!bConnected)
{
Connect();
}
SendCommand("CWD "+strDirName);
if(iReplyCode != 250)
{
throw new IOException(strReplySubstring(4));
}
thisstrRemotePath = strDirName;
}
#endregion
/// <summary>
/// 将一行应答字符串记录在strReply和strMsg
/// 应答码记录在iReplyCode
/// </summary>
private void ReadReply()
{
strMsg = "";
strReply = ReadLine();
iReplyCode = Int32Parse(strReplySubstring(0,3));
}
/// <summary>
/// 建立进行数据连接的socket
/// </summary>
/// <returns>数据连接socket</returns>
private Socket CreateDataSocket()
{
SendCommand("PASV");
if(iReplyCode != 227)
{
throw new IOException(strReplySubstring(4));
}
int index1 = strReplyIndexOf('(');
int index2 = strReplyIndexOf(')');
string ipData =
strReplySubstring(index1+1,index2-index1-1);
int[] parts = new int[6];
int len = ipDataLength;
int partCount = 0;
string buf="";
for (int i = 0; i < len && partCount <= 6; i++)
{
char ch = CharParse(ipDataSubstring(i,1));
if (CharIsDigit(ch))
buf+=ch;
else if (ch != ',')
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
if (ch == ',' || i+1 == len)
{
try
{
parts[partCount++] = Int32Parse(buf);
buf="";
}
catch (Exception)
{
throw new IOException("Malformed PASV strReply: " +
strReply);
}
}
}
string ipAddress = parts[0] + ""+ parts[1]+ "" +
parts[2] + "" + parts[3];
int port = (parts[4] << 8) + parts[5];
Socket s = new
Socket(AddressFamilyInterNetwork,SocketTypeStream,ProtocolTypeTcp);
IPEndPoint ep = new
IPEndPoint(IPAddressParse(ipAddress), port);
try
{
sConnect(ep);
}
catch(Exception)
{
throw new IOException("Can't connect to remote server");
}
return s;
}
/// <summary>
/// 关闭socket连接(用于登录以前)
/// </summary>
private void CloseSocketConnect()
{
if(socketControl!=null)
{
socketControlClose();
socketControl = null;
}
bConnected = false;
}
/// <summary>
/// 读取Socket返回的所有字符串
/// </summary>
/// <returns>包含应答码的字符串行</returns>
private string ReadLine()
{
while(true)
{
int iBytes = socketControlReceive(buffer, bufferLength, 0);
strMsg += ASCIIGetString(buffer, 0, iBytes);
if(iBytes < bufferLength)
{
break;
}
}
char[] seperator = {'\n'};
string[] mess = strMsgSplit(seperator);
if(strMsgLength > 2)
{
strMsg = mess[messLength-2];
//seperator[0]是10,换行符是由13和0组成的,分隔后10后面虽没有字符串,
//但也会分配为空字符串给后面(也是最后一个)字符串数组,
//所以最后一个mess是没用的空字符串
//但为什么不直接取mess[0],因为只有最后一行字符串应答码与信息之间有空格
}
else
{
strMsg = mess[0];
}
if(!strMsgSubstring(3,1)Equals(" "))//返回字符串正确的是以应答码(如220开头,后面接一空格,再接问候字符串)
{
return ReadLine();
}
return strMsg;
}
/// <summary>
/// 发送命令并获取应答码和最后一行应答字符串
/// </summary>
/// <param name="strCommand">命令</param>
private void SendCommand(string strCommand)
{
Byte[] cmdBytes = ASCIIGetBytes((strCommand + "\r\n")ToCharArray());
socketControlSend(cmdBytes, cmdBytesLength, 0);
ReadReply();
}
#endregion
}
}所以我推荐你先来pasv啊，pasv不用自己监听端口……
tcp和udp，前者是全相关后者是半相关这个有听说过吧？全相关就是 本地ip本地端口加远程ip远程端口，半相关就是本地ip本地端口没有远程ip远程端口。
tcp是全相关的，所以在你bind之后，是只有本地ip本地端口的，无法传输数据。此时在上面调用listen启用监听，然后accept函数会返回一个新的socket：这个socket因为是远程连过来的，所以有了远程的ip和远程的端口，就可以传数据了（注：调用accept那个socket就可以先关掉了）。
tcp涉及到监听的话就至少有两个socket，一个负责监听，监听之后接受连接。所以在port之前，你要先开一个socket，绑定好ip和端口，然后知道你绑定的是什么端口，然后把你的ip和端口用port发给服务器，比如你ip是19216812端口是12345，那么就
PORT 192,168,1,2,48,57
其中 48 256 + 57 = 12345
之后retr的时候，服务器就会往你给出的这个ip和端口上连接，连上了发数据给你。连不上就425。
pasv更容易一些，pasv之后服务器会给你一个ip和端口，然后你retr发出去之后就创建一个socket区连它给你的ip和端口就可以了，连接的方向正好和PORT的情况相反。端口也是这样的格式，先是ip，然后端口的高8位，然后端口的低8位。权限没设对，第一个检查ftp建立时候配置文件给的权限对不对，然后检查是不是linux防火墙设置的问题，第三个看linux中selinux的设置。
另外,团IDC网上有许多产品团购,便宜有口碑
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