secretchatdlg.cpp

一个用RSA算法实现加密通信的聊天程序。

		dwRead += dw;
	}

	SetFileTime((HANDLE)destFile.m_hFile,&StreamFileInfo.ftCreationTime,
                &StreamFileInfo.ftLastAccessTime,&StreamFileInfo.ftLastWriteTime);
	destFile.Close();
	SetFileAttributes(StreamFileInfo.szFileTitle,StreamFileInfo.dwFileAttributes);
	sockClient.Close();

	//询问打开文件，还是用递送消息吧，反正没事
	if(pMain->m_send_file)//m_send_file是中止标志
		pMain->PostMessage( WM_RUNHIDE,1,0);
	//恢复现场
	pMain->send_file_comeback_scene();	
	//AfxMessageBox("接收完毕！");
	return 0;	
}
/*
DWORD WINAPI send_file_thread(LPVOID param)		//发送文件线程
{
	CSecretChatDlg * pMain = (CSecretChatDlg *)param;

	MessagePackage msg;	
	msg.head = HEAD_SENDFILE;
	msg.ID = HEAD_SENDFILE_TEXT;
	msg.n = SENDFILESIZE;

	//::Sleep(100);	//发送的太快就会出错
	//把消息包分成若干块大小为SENDFILESIZE
	CFile file;
	if(!file.Open(
		pMain->m_send_file_name,
		CFile::modeRead | CFile::typeBinary))
	{
		AfxMessageBox("发送的文件无法读取");
		return 0;
	}
	file.Seek(pMain->m_send_file_seek_position, CFile::begin);
	file.Read(msg.data, SENDFILESIZE);//返回的是现在读写文件的位置
	pMain->m_send_file_seek_position += SENDFILESIZE;
	pMain->SendData(msg, SENDFILESIZE + 12/消息包头部长度/);
	file.Close();

	return 0;
}

DWORD WINAPI receive_file_thread(LPVOID param)		//接收文件线程
{
	CSecretChatDlg * pMain = (CSecretChatDlg *)param;

	MessagePackage msg;	
	msg = pMain->m_receive_file_buffer;

	CFile file;
	if(!file.Open(
		pMain->m_receive_file_name,
		CFile::modeWrite | CFile::typeBinary))
	{
		AfxMessageBox("发送的文件无法读取");
		return 0;
	}
	file.SeekToEnd();	//每次从尾部写入
	file.Write(msg.data, msg.n);
	pMain->m_send_file_seek_position += msg.n;	//已经接收文件的大小
	if(file.GetLength() >= (unsigned int)pMain->m_send_file_length)
	{	//这就表示接收完了文件
		file.SetLength(pMain->m_send_file_length);
		file.Close();

		//提示成功接收
		msg.head = HEAD_SENDFILE;
		msg.ID = 	HEAD_SENDFILE_SUCCEED;
		pMain->SendData(msg, 12);
		//恢复现场
		pMain->send_file_comeback_scene();	

		//询问打开文件，还是用递送消息吧，反正没事
		pMain->PostMessage( WM_RUNHIDE,1,0);
	}
	else
	{
		file.Close();
		//收到一个块后，就向对方确认之后再接收
		msg.head = HEAD_SENDFILE;
		msg.ID = HEAD_SENDFILE_CONCENT;
		pMain->SendData(msg, 12);
	}

	return 0;
}*/
///////////////////////////////////

//在任务栏状态区添加图标
BOOL MyTaskBarAddIcon(HWND hwnd,UINT uID,HICON hicon,LPSTR lpszTip)
{
    BOOL res;
	NOTIFYICONDATA tnid;
    tnid.cbSize = sizeof(NOTIFYICONDATA);
	tnid.hWnd = hwnd;
    tnid.uID = uID;
	tnid.uFlags = NIF_ICON | NIF_TIP | NIF_MESSAGE;
    tnid.uCallbackMessage = MYWM_NOTIFYICON;
	tnid.hIcon = hicon;
    if (lpszTip) lstrcpyn(tnid.szTip, lpszTip, sizeof(tnid.szTip));
    else tnid.szTip[0] = '\0';

    res = Shell_NotifyIcon(NIM_ADD,&tnid);
	if (hicon) DestroyIcon(hicon);
	return res;
}

//从任务栏状态区删除图标
BOOL MyTaskBarDeleteIcon( UINT uID,HWND hwnd)
{
	BOOL res;
    NOTIFYICONDATA tnid;
	tnid.cbSize = sizeof(NOTIFYICONDATA);
    tnid.hWnd = hwnd;
	tnid.uID = uID;
    res = Shell_NotifyIcon(NIM_DELETE, &tnid);
	return res;
}
/////////////////
//托盘图标事件
void CSecretChatDlg::OnMyIconNotify(WPARAM wParam/*uID*/,LPARAM lParam/*消息标识值*/)
{
	switch( lParam)
	{
	case WM_LBUTTONDOWN:	//点击图标
		if (IsWindowVisible())	//如果窗口已打开，隐藏窗口
		{
			//利用这两个动作就可实现动画了
			ShowWindow( SW_MINIMIZE);
			ShowWindow(SW_HIDE);		//隐藏动画
		}
		else					//否则，显示窗口
		{
			//利用这两个动作就可实现动画了	
			ShowWindow( SW_MINIMIZE);
			ShowWindow( SW_SHOWNORMAL);	//显示动画
		}
		break;
	case WM_RBUTTONDOWN:	//右击图标
		//右击是为了弹出菜单
		//要弹出菜单主菜单的属性必须要取消view as popup属性
		CPoint point;
		GetCursorPos( &point);
		CMenu menu;
		VERIFY( menu.LoadMenu( IDR_ICONMENU));
		CMenu * pMenu = menu.GetSubMenu(0);

		if(AfxGetApp()->GetProfileInt("General", "Top", 0))
		{	//总在前面标记
			pMenu->CheckMenuItem( ID_TOP,MF_CHECKED | MF_BYCOMMAND);
		}
	
		//要显示窗口还是隐藏
		if( IsWindowVisible())
		{
			pMenu->DeleteMenu( ID_SHOW,MF_BYCOMMAND);
		}
		else
		{
			pMenu->DeleteMenu( ID_HIDE,MF_BYCOMMAND);
		}
	
		pMenu->TrackPopupMenu( 32,point.x,point.y,this);
		break;
	}
}

BOOL CSecretChatDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	//没有联机
	m_online = FALSE;	

	//窗口初始化显示和设置函数
	InitializationWindow();

	/*创建套接字，并在套接字上监听连接*/
	m_socketListen.Create(LISTEN_PORT);
	m_bListen = m_socketListen.Listen();	//返回值可以判断是否监听成功，否则就已有实例在监听

	//关闭服务器和客户机的套接字对象
	m_pSocket = NULL;
	m_socketListen.m_pServiceSocket = NULL;


	//每隔30秒就向另一方发在线通知，还是不要这个在线通知了这样会减少一些错误吧
	SetTimer(1003, 30000, NULL);	

	//初始化CRITICAL_SECTION变量(m_cs.LockCount会等于-1)？不一定
	::InitializeCriticalSection(&m_cs_receive);

	//可以发送文件
	m_send_file = FALSE;

	//测试部分


	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSecretChatDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		//CAboutDlg dlgAbout;
		//dlgAbout.DoModal();
		m_setupDlg.m_index = 4;
		m_setupDlg.DoModal();
	}
	else if(nID == IDS_JIAMI)
	{
		HKEY hkey;
		char sz[MAX_PATH];	//缓冲区必须要和设置时的相同才能读到数据
		DWORD dwtype, sl = MAX_PATH;
		::RegOpenKeyEx(
			HKEY_CURRENT_USER,
			"Software\\文件密使\\Application",
			NULL,
			KEY_ALL_ACCESS,
			&hkey);
		::RegQueryValueEx(
			hkey,
			"DirectoryName",
			NULL,
			&dwtype,
			(LPBYTE)sz,
			&sl);
		::RegCloseKey(hkey);
		CString strJiaMi = sz;

		::ShellExecute(
			NULL, 
			"open",
			strJiaMi + "\\jiami.exe", 
			"", 
			"",
			SW_SHOW);
	}
	else if(nID == IDS_HELP)
	{
		::ShellExecute( 
			m_hWnd, 
			"open",
			"http://www.wjmshome.com/SecretChat.htm",
			"", 
			"", 
			SW_SHOWNORMAL);
	}
	else if(nID == SC_MINIMIZE)
	{
		//利用这两个动作就可实现动画了
		if(AfxGetApp()->GetProfileInt("General", "Tray", 1))
		{
			ShowWindow( SW_MINIMIZE);
			ShowWindow(SW_HIDE);		//隐藏动画
		}
		else
		{	
			ShowWindow( SW_MINIMIZE);
		}

	}


	CDialog::OnSysCommand(nID, lParam);
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSecretChatDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

HCURSOR CSecretChatDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSecretChatDlg::OnTimer(UINT nIDEvent) 
{
	if(nIDEvent == 1001)	//只负责清除状态提示栏的信息
	{
		m_statusMessages.SetWindowText("");

	}

	//LAN启动周期性连接
	else if(nIDEvent == 1002)
	{
		if(m_online)
			return;

		//只有在没有连接的情况下才，进行LAN周期性连接
		m_IP = AfxGetApp()->GetProfileString("General", "LANIP");
		m_port = LISTEN_PORT;

		if(!prevent_connect())
			return;	//防止自己连接自己

		m_statusMessages.SetWindowText("连接中...");

		/*连接不能在线程了完成否则对方无法创建得到服务器套接字对象，
		所以就发不了消息给客户机了*/
		if( (NULL != (m_pSocket = new CClientSocket)) //确定了指向那个套接字
			&& m_pSocket->Create() )		//创建套接字对象
		{
			if(m_pSocket->Connect(m_IP, m_port) )
			{	
				m_clientOrService = FALSE;	//客户端
				connect_succeed_update();
			}
			else
			{
				CloseSocket();//关闭套接字
			}
		}

		/*非主线程进入得地址不能访问套接字对象
		unsigned long nThreadID;
		::CreateThread(
			NULL,
			0,
			connect_thread,
			this,
			0,
			&nThreadID);*/	
	}

	/************每隔30秒就向另一方发在线通知**********/
	else if(nIDEvent == 1003)
	{
		if(m_online)
		{
			//每隔30秒向对方发送一次在线通知
			MessagePackage	msg;
			msg.head = HEAD_ZAIXIANBIAOJI;
			SendData(msg, 12);	

			//当连续有6个30秒没收到对方的在线通知就断定对方不在断开了
			m_zai_xian_biao_ji++;	//在线标记计算器加一
			if(m_zai_xian_biao_ji > 6)
			{
				if(!m_send_file) //发送文件时不要断开，因为可能由于发送文件使得消息无法发送出去，而产生了错误
				{
					Disconnection();
					m_statusMessages.SetWindowText("对方意外的断开了连接！");	//已经断开服务器连接
				}
			}
		}
		/*unsigned long nThreadID;
		::CreateThread(
			NULL,
			0,
			zai_xian_biao_ji_thread,
			this,
			0,
			&nThreadID);*/
	}

	CDialog::OnTimer(nIDEvent);
}

void CSecretChatDlg::OnOK() 
{
	// TODO: Add extra validation here
	
	//CDialog::OnOK();
}

void CSecretChatDlg::OnCancel() 
{
	//文件传送问答
	if(m_send_file)
	{
		if(MessageBox(
			"是否要取消文件传送？",
			"密聊",
			MB_YESNO | MB_ICONQUESTION) == IDYES)
		{	
			//::TerminateThread(
			//	m_send_file_thread_handle,
			//	NO_ERROR);	//结束线程

			MessagePackage msg;
			msg.head = HEAD_SENDFILE;
			msg.ID = HEAD_SENDFILE_STOP;
			SendData(msg, 12);
			//恢复现场
			send_file_comeback_scene();
		}
		return;
	}

	if(m_online)	//联机时或文件传送中的处理，要用户断开连接才能断开
	{	
		if(MessageBox(
			"连接中，是否关闭？",
			"密聊",
			MB_YESNO | MB_ICONQUESTION) == IDNO)
		{
			return;
		} 
		//只是告诉对方我已经关闭密聊
		MessagePackage	msg;
		msg.head = HEAD_DISCONNECTION;
		msg.ID = HEAD_DISCONNECTION_CLOSE;
		SendData(msg, 12);	
		Disconnection();
	}

	//清除
	MyTaskBarDeleteIcon(101, m_hWnd);	//从任务栏状态区删除图标

	//保存窗口位置
	if(IsWindowVisible() && !IsIconic())
	{	//要可见，没最小化
		CRect rect;
		GetWindowRect(rect);	//保存窗口位置
		CString str;
		str.Format("%i,%i,%i,%i",
			rect.top,
			rect.bottom,
			rect.left,
			rect.right);
		AfxGetApp()->WriteProfileString("Window", "Position", str);
	}

	CDialog::OnCancel();
}

void CSecretChatDlg::OnConnectDisconnection() //连接和断开
{
	//文件传送问答
	if(m_send_file)
	{
		if(MessageBox(
			"是否要取消文件传送？",
			"密聊",
			MB_YESNO | MB_ICONQUESTION) == IDYES)
		{	
			//::TerminateThread(
			//	m_send_file_thread_handle,
			//	NO_ERROR);	//结束线程

			MessagePackage msg;
			msg.head = HEAD_SENDFILE;
			msg.ID = HEAD_SENDFILE_STOP;
			SendData(msg, 12);
			//恢复现场
			send_file_comeback_scene();
		}
		return;
	}

	if(m_online)	//联机时的处理
	{
		if( MessageBox(
			"是否要断开连接?",
			"密聊",
			MB_YESNO | MB_ICONQUESTION) == IDNO)
		{
			return;
		}