mtclientdlg.cpp

《 MFC 编程技巧与范例详解 》〔曾凡锋

// MTClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MTClient.h"
#include "MTClientDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMTClientDlg dialog

CMTClientDlg::CMTClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMTClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMTClientDlg)
	m_strFile = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMTClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMTClientDlg)
	DDX_Control(pDX, ID_DOWNLOAD, m_btnDownload);
	DDX_Control(pDX, ID_CONNECT, m_btnConnect);
	DDX_Control(pDX, IDC_SERVER_IP, m_ipaServer);
	DDX_Text(pDX, IDC_EDIT_FILE, m_strFile);
	DDV_MaxChars(pDX, m_strFile, 80);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMTClientDlg, CDialog)
	//{{AFX_MSG_MAP(CMTClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(ID_CONNECT, OnConnect)
	ON_BN_CLICKED(ID_DOWNLOAD, OnDownload)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMTClientDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	WSADATA wsaData;
	int wsaret = WSAStartup(0x101,&wsaData);

	m_btnDownload.EnableWindow(FALSE);

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

void CMTClientDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		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 CMTClientDlg::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();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMTClientDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMTClientDlg::OnConnect() 
{
	// TODO: Add your control notification handler code here
	if( m_bConnect )
	{
		closesocket(m_socket);
		m_bConnect = FALSE;
		m_btnDownload.EnableWindow(FALSE);
		m_btnConnect.SetWindowText("连接服务器");
		return;
	}
	
	DWORD dwAddr;
	m_ipaServer.GetAddress(dwAddr);
	in_addr ina;
	ina.S_un.S_addr = ntohl(dwAddr);
	char* sIP = inet_ntoa(ina);

	struct hostent *hp;
	unsigned int addr;
	struct sockaddr_in server;

	m_socket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(m_socket==INVALID_SOCKET)
		return;

	addr=inet_addr(sIP);
	hp=gethostbyaddr((char*)&addr,sizeof(addr),AF_INET);

	if(hp==NULL)
	{
		closesocket(m_socket);
		return;
	}
	server.sin_addr.s_addr=*((unsigned long*)hp->h_addr);
	server.sin_family=AF_INET;
	server.sin_port=htons(2008);
	if(connect(m_socket,(struct sockaddr*)&server,sizeof(server)))
	{
		closesocket(m_socket);
		return;	
	}

	m_btnDownload.EnableWindow(TRUE);
	m_btnConnect.SetWindowText("断开服务器");
	m_bConnect = TRUE;
}

void CMTClientDlg::OnDownload() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	if( m_strFile == "" )
		return;
	
	char buff[BUFFER_SIZE];
	int z;
	z=recv(m_socket,buff,BUFFER_SIZE,0);
	buff[z]=0;
	
	strcpy(buff,"auth ncut\r\n");
	send(m_socket,buff,strlen(buff),0);
	
	z=recv(m_socket,buff,BUFFER_SIZE,0);
	buff[z]=0;
	
	
	sprintf(buff,"file %s\r\n",m_strFile);
	send(m_socket,buff,strlen(buff),0);
	
	CFile f;
	char *fname;
	char fname2[256];
	if(!(fname=strrchr(m_strFile,'\\')))
		strcpy(fname2,m_strFile);
	else
		strcpy(fname2,fname+1);	
	
	if( !f.Open(fname2,CFile::modeCreate | CFile::modeWrite) )
		return;
	
	bool first=true;
	bool second=false;
	while(true)
	{		
		z=recv(m_socket,buff,BUFFER_SIZE,0);
		if(z==SOCKET_ERROR)
		{
			AfxMessageBox("socket error \r\n");
			break;
		}	
		if(second)
		{
			if(NoFile(buff,BUFFER_SIZE)<BUFFER_SIZE)
			{
				AfxMessageBox("File not found on server\r\n");
				break;
			}
			second=false;
		}
		if(first)
		{
			if(NoFile(buff,BUFFER_SIZE)<BUFFER_SIZE)
			{
				AfxMessageBox("File not found on server\r\n");
				break;
			}
			first=false;
			second=true;
		}
		
		int b;
		if((b=EndFile(buff,z))<z)
		{		
			f.Write(buff,b);
			AfxMessageBox("File has been saved\r\n");
			break;
		}
		f.Write(buff,z);
	}	
	f.Close();

}

int CMTClientDlg::EndFile(char *buff, int len) 
{
	int pos = len;

	int n = 0;
	while( n < len )
	{
		if( buff[n] == '#' )
		{
			char s[9];
			strncpy(s, &buff[n],8);
			s[8] = '\0';
			if( !strcmp(s, "#SEND OK") )
			{
				pos = n;
				break;
			}
			
		}
		n++;
	}

	return pos;
}

int CMTClientDlg::NoFile(char *buff, int len) 
{
	int pos = len;

	int n = 0;
	while( n < len )
	{
		if( buff[n] == '!' )
		{
			char s[9];
			strncpy(s, &buff[n],8);
			s[8] = '\0';
			if( !strcmp(s, "!NO FILE") )
			{
				pos = n;
				break;
			}
			
		}
		n++;
	}

	return pos;
}