crcseverdlg.cpp

《Visual C++视频技术方案宝典》配套光盘

// CRCSeverDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CRCSever.h"
#include "CRCSeverDlg.h"
#include <windowsx.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()

/////////////////////////////////////////////////////////////////////////////
// CCRCSeverDlg dialog

CCRCSeverDlg::CCRCSeverDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCRCSeverDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCRCSeverDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCRCSeverDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCRCSeverDlg)
	DDX_Control(pDX, IDC_PATH, m_Path);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCRCSeverDlg, CDialog)
	//{{AFX_MSG_MAP(CCRCSeverDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPENFILE, OnOpenfile)
	ON_BN_CLICKED(IDC_SENDFILE, OnSendfile)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCRCSeverDlg message handlers

BOOL CCRCSeverDlg::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
	//创建套接字
	m_server = socket(AF_INET,SOCK_STREAM,0);
	//将网络中的事件关联到窗口的消息函数中
	WSAAsyncSelect(m_server,m_hWnd,2000,FD_WRITE|FD_READ|FD_ACCEPT);
	m_client = 0;
	m_serverIP = "";
	//获取IP地址
	char name[MAX_PATH];
	gethostname(name,MAX_PATH);
	hostent* hostInfo = gethostbyname(name);
	CString ip =  inet_ntoa(*(in_addr*)hostInfo->h_addr_list[0]);

	//服务器端地址
	sockaddr_in serveraddr;
	serveraddr.sin_family = AF_INET;
	m_serverIP = ip;
	//设置本机地址
	serveraddr.sin_addr.S_un.S_addr  = inet_addr(m_serverIP);
	UpdateData(TRUE);
	//设置端口号
	serveraddr.sin_port = htons(70);
	//绑定地址
	if(bind(m_server,(sockaddr*)&serveraddr,sizeof(serveraddr)))
	{
		MessageBox("绑定地址失败.");
		return;
	}
	//开始监听
	listen(m_server,5);
	CreateTable();
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCRCSeverDlg::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 CCRCSeverDlg::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 CCRCSeverDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CCRCSeverDlg::OnOpenfile() 
{
	// TODO: Add your control notification handler code here
	//打开对话框 
	CFileDialog dlg(TRUE,NULL,"",OFN_HIDEREADONLY,"All Files (*.*)|*.*||",this);
    if(IDOK == dlg.DoModal())
	{
		m_pathName = dlg.GetPathName();
		m_strName = dlg.GetFileName();
		m_Path.SetWindowText(m_pathName);
	}
}

void CCRCSeverDlg::OnSendfile() 
{
	// TODO: Add your control notification handler code here
	sockaddr_in serveraddr;
	int len =sizeof(serveraddr);
	if (m_client==0) //客户端连接服务器
	{
		m_client = accept(m_server,(struct sockaddr*)&serveraddr,&len);
	}
	int ret = send(m_client,m_strName,m_strName.GetLength(),0);
	if(ret == SOCKET_ERROR)
	{
		CString str;
		str.Format("发送数据失败，错误码:%d",WSAGetLastError());
		MessageBox(str);
		return;
	}
	Sleep(100);

	CFile file(m_pathName,CFile::modeRead);
	DWORD size = file.GetLength();
			
	HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE,size);
	void* lpBuf = GlobalLock(hGlobal);
	file.ReadHuge(lpBuf,size);
	send(m_client,(char*)lpBuf,size,0);
	GlobalUnlock(hGlobal);
	GlobalFree(hGlobal);
	file.Close();
	Sleep(100);
	char a[1]={'^'}; //结束符
	send(m_client,a,1,0);
	Sleep(100);
	HANDLE hFile = {NULL};
	DWORD dwSize, bytes_read;
	hFile = CreateFile(m_pathName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
		NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
	dwSize = GetFileSize(hFile, NULL);

	CString csData(' ', dwSize);
	ReadFile(hFile, csData.GetBuffer(dwSize), dwSize, &bytes_read, NULL);
	CloseHandle(hFile);
	csData.ReleaseBuffer();

	int nCRC = GetCRC(csData, dwSize);
	char ch[20];
	itoa(nCRC, ch, 16); 
	m_Crc = ch;
}

void CCRCSeverDlg::CreateTable()
{
	unsigned long crc;
	for(int i=0;i<256;i++)
	{
		crc = i;
		for(int j=0;j<8;j++)
		{
			if(crc & 1)
				crc = (crc >> 1) ^ 0xEDB88320;
			else
				crc >>= 1;
		}
		CRC32Table[i] = crc;
	}
}

int CCRCSeverDlg::GetCRC(CString &csData, DWORD dwSize)
{
	unsigned long crc(0xffffffff);
	int len;
	unsigned char* buffer;
	len = dwSize;
	buffer = (unsigned char*)(LPCTSTR)csData;
	while(len--)
		crc = (crc >> 8) ^ CRC32Table[(crc & 0xFF) ^ *buffer++];
	return crc^0xffffffff;
}

BOOL CCRCSeverDlg::PreTranslateMessage(MSG* pMsg) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(pMsg->message==2000)
	{
		char buffer[8];
		//接收客户端的数据
		int num = recv(m_client,buffer,1024,0);
		buffer[num]= 0;
		if(buffer[0]=='1')
		{
			send(m_client,m_Crc,m_Crc.GetLength(),0);
		}
	}
	else
		return CDialog::PreTranslateMessage(pMsg);
}