simpleclientdlg.cpp

“基本套接字实现基本聊天功能”,教学示例使用。

// SimpleClientDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SimpleClient.h"
#include "SimpleClientDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
//全局变量
CString ChatInfo;  //存储短消息内容
BOOL ChatEnable;   //聊天开关，TRUE时可以聊天，登陆成功前为FALSE

////////////////////////线程接收API函数///////////////////////
//参数为套接字句柄，其中最重要的子函数为recv()库函数//
DWORD WINAPI Recvthread(LPVOID lpparam)
{
	SOCKET  m_socket=(SOCKET)lpparam; //创建接收数据的套接字
	char buff[256];                   //创建接收数据的缓冲区
    int ret;
	while(1)
	{
		ret=recv(m_socket,buff,256,0); //库函数，从一个套接口接收数据
		//recv()函数对SOCk_STREAM类型的套接口，返回所有有用信息
	    if(ret==SOCKET_ERROR)
		{
			closesocket (m_socket);
			return -1;
		}
		buff[ret]='\0';
		if (!strcmp(buff, "登陆成功，现在可以使用短信功能!"))
		{
			ChatEnable=TRUE;
		}
		CString str;
		str=_T("服务器：");
		str+=buff;
		AfxMessageBox(str);
	}
    	return 0;
}


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()

/////////////////////////////////////////////////////////////////////////////
// CSimpleClientDlg dialog

CSimpleClientDlg::CSimpleClientDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSimpleClientDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSimpleClientDlg)
	m_strPass = _T("maoyue");
	m_strServer = _T("127.0.0.1");
	m_strUser = _T("maoy");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_hSocket = NULL;
	isStart=FALSE;
}

void CSimpleClientDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSimpleClientDlg)
	DDX_Text(pDX, IDC_PASS, m_strPass);
	DDX_Text(pDX, IDC_SERVERIP, m_strServer);
	DDX_Text(pDX, IDC_USER, m_strUser);
	DDX_Text(pDX,IDC_MSG,m_strMSG);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSimpleClientDlg, CDialog)
	//{{AFX_MSG_MAP(CSimpleClientDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_BUTTON1, OnSendMSG)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSimpleClientDlg message handlers

BOOL CSimpleClientDlg::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
	
	StartUp();
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CSimpleClientDlg::OnOK() 
{
	//判断套接字是否建立
	if(isStart)
	{
		closesocket(m_hSocket);
		m_hSocket = NULL;
	}
	else
	{
		m_hSocket = socket(AF_INET, SOCK_STREAM,0);
		if (m_hSocket==INVALID_SOCKET)
		{
			AfxMessageBox("Socket Create Error!");
			return;
		}
	}
	UpdateData();      //更新数据

	m_addr.sin_family = AF_INET; //常量AF_INET一般取2 
	m_addr.sin_addr.S_un.S_addr = inet_addr(m_strServer.GetBuffer(0));
	m_addr.sin_port = htons(1028);  //服务器端口号

	int ret;
	int error = 0;
	ret = connect(m_hSocket, (LPSOCKADDR)&m_addr, sizeof(m_addr));
	if(ret == SOCKET_ERROR)
	{
		AfxMessageBox("Connect Error!");
		return ;
	}
	//以下为用户密码封包
	CString str;
	str += char(m_strUser.GetLength());
	str += m_strUser;
	str += char(m_strPass.GetLength());
	str += m_strPass;
	char* buf = str.GetBuffer(0);
	ret = send(m_hSocket, buf, str.GetLength(), 0);
	if(ret != str.GetLength())
	{
		AfxMessageBox("Send data error!");
		return ;
	}
	//建立接收线程
	DWORD dwthread;
	::CreateThread(NULL,0,Recvthread,(LPVOID)m_hSocket,0,&dwthread);	
	isStart=TRUE;  //置客户端状态为开
}

void CSimpleClientDlg::StartUp()
{
	WSADATA wsaData;  //一个结构，加载版本库相关信息
	WORD version = MAKEWORD(2, 0);  //winsock版本号
	int ret = WSAStartup(version, &wsaData); //套接字初始化
	if(ret != 0)
		TRACE("Initilize Error!\n");
}

void CSimpleClientDlg::CleanUp()
{
	if (WSACleanup() != 0)
	{
		TRACE("UnInitilize Error:%d\n", WSAGetLastError());
	}
}

void CSimpleClientDlg::OnCancel() 
{
	if(m_hSocket != NULL)
	{
		closesocket(m_hSocket);
		m_hSocket = NULL;
	}
	CDialog::OnCancel();
}

void CSimpleClientDlg::OnDestroy() //卸载窗口
{
	CDialog::OnDestroy();
	
	if(m_hSocket != NULL)
	{
		closesocket(m_hSocket);
		m_hSocket = NULL;
	}
	CleanUp();
}

void CSimpleClientDlg::OnSendMSG() //发送短消息函数
{
	if(ChatEnable)
	{
		UpdateData();
        int ret;
	    CString str;
	    str="发向服务器的消息为:";
	    str+=m_strMSG;
	    m_strMSG.Empty();
		UpdateData(FALSE);
		ret=send(m_hSocket,str,str.GetLength(),0);
		if(ret<0)
		{
		//return -1;
		}
		AfxMessageBox("Socket have send a msg!");
	}
	else
		AfxMessageBox("连接尚未建立，请先建立连接!");

    }