tcpclientdlg.cpp

多客户端与服务器（多线程）通信

// TCPClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TCPClient.h"
#include "TCPClientDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CTCPClientDlg dialog
#define PORT	34567
#define SIZEFILE 1024

CTCPClientDlg::CTCPClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTCPClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTCPClientDlg)
		// 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 CTCPClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTCPClientDlg)
	DDX_Control(pDX, IDC_HOSTIP, m_HostIP);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTCPClientDlg, CDialog)
	//{{AFX_MSG_MAP(CTCPClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BTN_CONNECT, OnBtnConnect)
	ON_BN_CLICKED(IDC_BTN_DISCONNECT, OnBtnDisconnect)
	ON_BN_CLICKED(IDC_BTN_SERACH, OnBtnSerach)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTCPClientDlg message handlers

BOOL CTCPClientDlg::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
	GetDlgItem(IDC_BTN_DISCONNECT)->EnableWindow(false);
	GetDlgItem(IDC_BTN_SERACH)->EnableWindow(false);

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

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

void CTCPClientDlg::OnBtnConnect() 
{
	// TODO: Add your control notification handler code here

	((CEdit*)GetDlgItem(IDC_EDIT_RECORD))->SetWindowText("");
	
	GetDlgItem(IDC_BTN_CONNECT)->EnableWindow(false);//连接不可用
	GetDlgItem(IDC_BTN_DISCONNECT)->EnableWindow(true);//中断连接可用
	GetDlgItem(IDC_BTN_SERACH)->EnableWindow(true);//搜索可用

	//建立连接，连接成功后发送消息
	int createFlag = m_sock.Create();
	if (0==createFlag)
	{
		MessageBox("CSocket Create Error!"+GetError(GetLastError()));
		return ;
	}
	CString ipStr;
	GetDlgItemText(IDC_HOSTIP,ipStr);
	int connectFlag = m_sock.Connect(ipStr,PORT);
	if (0==connectFlag)
	{
		MessageBox("Connect to Server Error!"+GetError(GetLastError()));
		return ;
	}
	((CEdit*)GetDlgItem(IDC_EDIT_RECORD))->SetWindowText("客户端启动！\r\n连接"+ipStr+"成功\r\n");
}

void CTCPClientDlg::OnBtnDisconnect() 
{
	// TODO: Add your control notification handler code here
	m_sock.Send("D",2);
	m_sock.Close();
	GetDlgItem(IDC_BTN_CONNECT)->EnableWindow(true);//连接可用
	GetDlgItem(IDC_BTN_DISCONNECT)->EnableWindow(false);//中断连接不可用
	GetDlgItem(IDC_BTN_SERACH)->EnableWindow(false);//搜索不可用
}

void CTCPClientDlg::OnBtnSerach() 
{
	// TODO: Add your control notification handler code here
	//连接好了之后用m_sock与服务器通信
	CString fileName;
	CString oldStr;
	GetDlgItemText(IDC_EDIT_FILENAME,fileName);
	if (fileName.GetLength()==0)
	{
		MessageBox("请输入文件名");
		return;
	}
	m_sock.Send(fileName,fileName.GetLength());
	char buf[500]={0};

	int recvFlag = m_sock.Receive(buf,500);  //阻塞接收

	CString result(buf);
	if (result.IsEmpty())
	{
		return;
	}
	
	if (recvFlag==2&&buf[0]=='D')
	{
		result = "服务器已经关闭，自动断开……";
		m_sock.Close();
		GetDlgItem(IDC_BTN_CONNECT)->EnableWindow(true);//连接可用
		GetDlgItem(IDC_BTN_DISCONNECT)->EnableWindow(false);//中断连接不可用
		GetDlgItem(IDC_BTN_SERACH)->EnableWindow(false);//搜索不可用
	}
	else if (recvFlag==2&&buf[0]=='N')
	{
		result = "没有要搜索的文件"+fileName+"……";
		GetDlgItemText(IDC_EDIT_RECORD,oldStr);
		oldStr = oldStr+result+"\r\n";
		SetDlgItemText(IDC_EDIT_RECORD,oldStr);
	}
	else
	{
		CFileDialog dlg(false,NULL,fileName);	//保存文件
		dlg.m_ofn.lpstrTitle="是否接收文件?";//标题条
		//memset(buf,0,500);
		//memcpy(buf,fileName,sizeof(fileName));
		//dlg.m_ofn.lpstrFile=buf;	//文件名称
		if (IDOK==dlg.DoModal()) //表示同意接收
		{
			m_sock.Send("Y",2);
			result = "开始接收文件"+fileName+"……";
			GetDlgItemText(IDC_EDIT_RECORD,oldStr);
			oldStr = oldStr+result+"\r\n";
			SetDlgItemText(IDC_EDIT_RECORD,oldStr);
			CString filePath = dlg.GetPathName();
			SaveTheFile(filePath);
		}
		else
		{
			m_sock.Send("N",2);
			result = "拒绝接收文件"+fileName+"……";
			GetDlgItemText(IDC_EDIT_RECORD,oldStr);
			oldStr = oldStr+result+"\r\n";
			SetDlgItemText(IDC_EDIT_RECORD,oldStr);
		}
	}
}
int CTCPClientDlg::SaveTheFile(CString filePath)
{
	char buf[SIZEFILE]={0};
	CFile f(filePath,CFile::modeCreate|CFile::modeWrite);	//存文件
	
	int n=0;	//接受的字节数 0表示结束
	
	while(true)
	{
		n=m_sock.Receive(buf,SIZEFILE);	//接受
		if(n==2&&buf[0]=='O')	break; //O表示结束
		m_sock.Send("O",2); //测试程序 保持socket畅通，否则Client卡住
		f.Write(buf,n);
	}
	f.Close();
	CString oldStr;
	GetDlgItemText(IDC_EDIT_RECORD,oldStr);
	oldStr = oldStr+"文件接收完毕"+"\r\n";
	SetDlgItemText(IDC_EDIT_RECORD,oldStr);
	return 0;
}


CString CTCPClientDlg::GetError(DWORD error)
{
	CString strError;
	switch(error)
	{
	case WSANOTINITIALISED:
		strError="初始化错误";
		break;
	case WSAENOTCONN:
		strError="对方没有启动";
		break;
	case WSAEWOULDBLOCK :
		strError="对方已经关闭";
		break;
	case WSAECONNREFUSED:
		strError="连接的尝试被拒绝";
		break;
	case WSAENOTSOCK:
		strError="在一个非套接字上尝试了一个操作";
		break;
	case WSAEADDRINUSE:
		strError="特定的地址已在使用中";
		break;
	case WSAECONNRESET:
		strError="与主机的连接被关闭";
		break;
	default:
		strError="一般错误";	
	}
	return strError;
}