serverdlg.cpp

网络技术

// ServerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Server.h"
#include "ServerDlg.h"
#include "MySocket.h"
#include "process.h"

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

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

CString filename;
char fn[40];
	

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()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg dialog

CServerDlg::CServerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CServerDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CServerDlg)
		// 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 CServerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CServerDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CServerDlg, CDialog)
	//{{AFX_MSG_MAP(CServerDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_BN_CLICKED(IDC_LISTEN, OnListen)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg message handlers

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

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


void GetBeginPos(int TotalThreads,int ThreadIndex/*from 1*/,long file_length, long &BgPos, long &BlkSize)
{
	long BlockSize, lastBlockSize, BeginPos;
	int i;
	BlockSize=file_length/TotalThreads;
	lastBlockSize=file_length;
	BeginPos=0;
	for(i=1;i<=ThreadIndex-1;i++)
	{
		lastBlockSize=lastBlockSize-BlockSize;
		BeginPos=BeginPos+BlockSize;
	}
	if (ThreadIndex==TotalThreads)
	{
		BgPos=BeginPos;
		BlkSize=lastBlockSize;
	}
	else
	{
		BgPos=BeginPos;
		BlkSize=BlockSize;
	}
}


extern CMySocket listenSocket, sendSockets[5];

#define ReadSize 500
void SendThread(int idx)  // 传输文件数据的函数（搬运工人）
{
	CFile file;
	char data[ReadSize];
	long BeginPos, Size;
	long FileLength;
	long ReadOnce, LeftToRead, count;
	
	if(!file.Open(fn,CFile::modeRead|CFile::shareDenyNone))
	{
		AfxMessageBox("read file error!");
		return;
	}
	FileLength=file.GetLength();
	sendSockets[idx-1]. Send(&FileLength, 4);
	sendSockets[idx-1]. Send(fn, 40);
	// 获取本线程传输任务（传送块的大小和起始位置）
	GetBeginPos(5 , idx, FileLength ,BeginPos, Size); //其中的5表示总共有5个线程，idx表示本线程编号
	file.Seek(BeginPos, CFile::begin); //每个线程函数找到自己任务的起始点
	LeftToRead=Size;
	while(LeftToRead>0)
	{
		ReadOnce=(LeftToRead>ReadSize)?ReadSize:LeftToRead;
		count=file.ReadHuge(data,ReadOnce);
		while((SOCKET_ERROR== sendSockets[idx-1].Send(data,count)))
		{
		}
		LeftToRead=LeftToRead-count;
  	}
	file.Close();
}


void SendThreadFunction(void * pParam)
{
	int idx=(int)pParam;
	SendThread(idx+1);
	_endthread();
}


#define ReadSize 500
void CServerDlg::OnSend() 
{
	// TODO: Add your control notification handler code here
	CFileDialog fd(TRUE);
	if(IDOK==fd.DoModal())  // 选择文件对话框
	{
		//选择了文件
		filename=fd.GetFileName();  //获取选择的文件的文件名
		strcpy(fn,filename.GetBuffer(0));
	}
	else return; //按了取消按钮

	for(int i=0;i<5;i++)
		_beginthread(SendThreadFunction,0,(void *)i);
	
}

void CServerDlg::OnListen() 
{
	// TODO: Add your control notification handler code here
	listenSocket.Create(7000);
	listenSocket.Listen();
}