聊天室程序VC-MFC.doc

網(wǎng)絡程序設計課 程 設 計 報 告 書題 目： 簡單的聊天程序 專 業(yè)： 網(wǎng)絡工程 題目：簡單的聊天程序本題是一個簡單的聊天室程序，采用客戶/服務器模式，分為客戶端程序和服務器端程序。由于服務器只能支持一個客戶，實際上是一個點對點通信的程序?？蛻舳顺绦蚝头掌鞒绦蛲ㄟ^網(wǎng)絡交換聊天字符串內(nèi)容，并在窗口的列表框中顯示。本實例程序的技術要點是：l 如何從CasyncSocket類派生出自己的WinSock類。l 理解WinSock類與應用程序框架的關系。l 重點學習流式套接字對象的使用。l 處理網(wǎng)絡事件的方法。它是基于SOCKET的局域網(wǎng)通信是一種靈活的、易于實現(xiàn)的、低成本的方法。在SOCKET API的幫助下，開發(fā)基于SOCKET的局域網(wǎng)通信軟件也是易于實現(xiàn)的。一、設計內(nèi)容1、設計目的綜合運用本課程及計算機網(wǎng)絡的相關知識設計并實現(xiàn)一個網(wǎng)絡應用程序，以Visual C+作為開發(fā)平臺，通過實踐復習鞏固課堂所學的理論知識，提高對所學知識的綜合應用能力。2、 設計要求 采用客戶/服務器模式，分為客戶端程序和服務器端程序。由于服務器只能支持一個客戶，實際上是一個點對點通信的程序。其既是服務器又是客戶端，在兩臺計算機上運行。2、 設計原理 通過socket()系統(tǒng)調用創(chuàng)建一個Socket數(shù)組后(即設定了接受連接客戶的最大數(shù)目)，與指定的本地端口綁定bind()，就可以在端口進行偵聽listen()。如果有客戶端連接請求，則在數(shù)組中選擇一個空Socket，將目的地址賦給這個Socket。Socket聊天室基本原理是，拋開CGI（公共網(wǎng)關接口）和www服務器，根據(jù)html規(guī)范，接收到瀏覽器的請求以后，模仿www服務器的響應，將聊天內(nèi)容發(fā)回瀏覽器。在瀏覽器看來就像瀏覽一個巨大的頁面一樣始終處于頁面聯(lián)接狀態(tài)， 這就是一個專門的聊天服務器，一個簡化了的www服務器。三、設計過程1、程序設計流程及源代碼(1)流程圖 客戶端 客戶端 目的IP地址 發(fā)送消息 發(fā)送消息 目的IP地址 （2） 源代碼 / ChatDlg.cpp : implementation file/#include stdafx.h#include Chat.h#include ChatDlg.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CAboutDlg dialog used for App Aboutclass CAboutDlg : public CDialogpublic: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/ Implementationprotected:/AFX_MSG(CAboutDlg)/AFX_MSGDECLARE_MESSAGE_MAP();CAboutDlg:CAboutDlg() : CDialog(CAboutDlg:IDD)/AFX_DATA_INIT(CAboutDlg)/AFX_DATA_INITvoid CAboutDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CAboutDlg)/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CAboutDlg, CDialog)/AFX_MSG_MAP(CAboutDlg)/ No message handlers/AFX_MSG_MAPEND_MESSAGE_MAP()/ CChatDlg dialogCChatDlg:CChatDlg(CWnd* pParent /*=NULL*/): CDialog(CChatDlg:IDD, pParent)/AFX_DATA_INIT(CChatDlg)/ NOTE: the ClassWizard will add member initialization here/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME);void CChatDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CChatDlg)/ NOTE: the ClassWizard will add DDX and DDV calls here/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CChatDlg, CDialog)/AFX_MSG_MAP(CChatDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BTN_SEND, OnBtnSend)/AFX_MSG_MAPON_MESSAGE(WM_RECVDATA,OnRecvData)END_MESSAGE_MAP()/ CChatDlg message handlersBOOL CChatDlg: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 AppendMenu(MF_SEPARATOR);pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);/ Set the icon for this dialog. The framework does this automatically/ when the applications main window is not a dialogSetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small icon/ TODO: Add extra initialization hereInitSocket();RECVPARAM *pRecvParam=new RECVPARAM;pRecvParam-sock=m_socket;pRecvParam-hwnd=m_hWnd;HANDLE hThread=CreateThread(NULL,0,RecvProc,(LPVOID)pRecvParam,0,NULL);CloseHandle(hThread);return TRUE; / return TRUE unless you set the focus to a controlvoid CChatDlg:OnSysCommand(UINT nID, LPARAM lParam)if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout;dlgAbout.DoModal();elseCDialog: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 CChatDlg:OnPaint() if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint 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 icondc.DrawIcon(x, y, m_hIcon);elseCDialog:OnPaint();/ The system calls this to obtain the cursor to display while the user drags/ the minimized window.HCURSOR CChatDlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;BOOL CChatDlg:InitSocket()m_socket=socket(AF_INET,SOCK_DGRAM,0);if(INVALID_SOCKET=m_socket)MessageBox(套接字創(chuàng)建失敗！);return FALSE;SOCKADDR_IN addrSock;addrSock.sin_family=AF_INET;addrSock.sin_port=htons(6000);addrSock.sin_addr.S_un.S_addr=htonl(INADDR_ANY);int retval;retval=bind(m_socket,(SOCKADDR*)&addrSock,sizeof(SOCKADDR);if(SOCKET_ERROR=retval)closesocket(m_socket);MessageBox(綁定失??！);return FALSE;return TRUE;DWORD WINAPI CChatDlg:RecvProc(LPVOID lpParameter)SOCKET sock=(RECVPARAM*)lpParameter)-sock;HWND hwnd=(RECVPARAM*)lpParameter)-hwnd;SOCKADDR_IN addrFrom;int len=sizeof(SOCKADDR);char recvBuf200;char tempBuf300;int retval;while(TRUE)retval=recvfrom(sock,recvBuf,200,0,(SOCKADDR*)&addrFrom,&len);if(SOCKET_ERROR=retval)break;sprintf(tempBuf,%s說: %s,inet_ntoa(addrFrom.sin_addr),recvBuf);:PostMessage(hwnd,WM_RECVDATA,0,(LPARAM)tempBuf);return 0;void CChatDlg:OnRecvData(WPARAM wParam,LPARAM lParam)CString str=(char*)lParam;CString strTemp;GetDlgItemText(IDC_EDIT_RECV,strTemp);str+=rn;str+=strTemp;SetDlgItemText(IDC_EDIT_RECV,str);void CChatDlg:OnBtnSend() / TODO: Add your control notification handler code hereDWORD dwIP;(CIPAddressCtrl*)GetDlgItem(IDC_IPADDRESS1)-GetAddress(dwIP);SOCKADDR_IN addrTo;addrTo.sin_family=AF_INET;addrTo.sin_port=htons(6000);addrTo.sin_addr.S_un.S_addr=htonl(dwIP);CString strSend;CString xin;GetDlgItemText(IDC_EDIT_RECV,xin);xin+=rn;GetDlgItemText(IDC_EDIT_SEND,strSend);xin+=strSend;SetDlgItemText(IDC_EDIT_RECV,xin);sendto(m_socket,strSend,strSen