C++课程设计：基于Socket通信的聊天室

1、.课 程 设 计 报 告 课程名称： 高级语言课程设计 设计题目： 基于Socket通信的聊天室 专 业：计算机科学与技术 姓 名： 学 号： 指导教师：李 晓 虹2016 年 1 月 10 日:1需求分析1.1聊天室程序的开发背景近年来，互连网发展日新月异，网络使空间的距离不再成为人们沟通的障碍，世界各个角落的人们可以通过Internet收发邮件、实时聊天、获取最新的资讯。因此本次毕业设计以“面向连接的Winsock网络会话程序开发”为题，制作一个C/S聊天室程序，通过制作该程序还能更好的学习网络socket编程的相关知识。 1.2聊天室的设计目标 本课题是建立聊天通信模型,设计一个聊天室软

2、件，只是简单的利用Socket来实现端到端的通信，主要功能为： 服务器端功能：1、初始化socket, 进行单对单的点对点连接模式2、输入远程用户的IP地址可以进行socket连接。3、接受用户传送来的聊天信息，然后显示在列表上。4、接受用户传送来的连接判断命令，并向用户发出响应命令。2.总体设计 2.1 功能要求² 支持点到点的连接，在服务器和多个客户端之间进行数据传输；² 接收客户端发送的消息，并显示在一个列表框中；² 显示出连接的用户计算机名字；2.2系统主要功能和主要功能描述：聊天程序必须能够做3件事情：（1） 聊天程序要在待定的端口上通过socket发送

3、聊天文字，并发送到开启相同程序的客户端。 （2） 聊天程序要及时接受从其他地方发送过来的信息，然后把这些信息显示在列表框中去。（3） 服务器还要监控这些连接的状态，在客户主动离开或发生故障时从列表中删除相应的表项，并及时更新连接表。这些要求可以通过CSocket类提供的功能实现。从CSocket派生出两个类CListenSocket和CClientSocket,它们分别用来侦听客户的连接请求和建立与客户的连接。服务器只需要一个侦听套接字CListenSocket，然后根据客户的连接请求动态创建客户套接字CClientSocket。客户套接字的数量是不可预知的，因此需要一个列表来记录。MFC的C

4、PtrList类就能实现这种功能。3.详细设计3.1设计流程图启动启动客户端用户创建子套接字MessageCClientSocketCClientSocketMessage登陆成功连接上发送message显示找到客户端并显示3.2设计实现（1）首先启动Visual C+ 6.0，利用MFC AppWizardEXE建立一个新的MFC工程,工程名为tcpclient，在MFC AppWizard Step1的时候选择Dialog based 即基于对话框，在Step4时勾选Windows Sockets选项（如图3-11），其他默认值下一步。图3-11（2）程序主要分为三个窗口，第一个是发送数据

5、的窗口，需要输入连接到服务器的相关设置信息，一般为IP地址，第二个是聊天信息显示窗口，也就是接受数据的窗口，该窗口显示接收到的消息；第三个是消息编辑发送窗口，需要输入你要发送的信息内容并发送，还有一个是主机名窗口，输入目标的主机名即可发送信息。图3-12 (3)下面重点介绍一下单击连接服务器按钮时的处理网络连接的函数。代码设置如下：BOOL CChatRoomDlg:OnInitDialog()CDialog:OnInitDialog();ASSERT(IDM_ABOUTBOX & 0xFFF0) = IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX < 0xF

6、000);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 do

7、es this automatically/ when the application's main window is not a dialogSetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small icon/ TODO: Add extra initialization hereInitSocket();return TRUE; / return TRUE unless you set the focus to a control（5）接下来就是创建通信隧道，绑定监听端口的函数，代码设置如下：

8、HCURSOR CChatRoomDlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;BOOL CChatRoomDlg:InitSocket()m_socket = WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);if(INVALID_SOCKET = m_socket)MessageBox("创建套接字失败");return FALSE;SOCKADDR_IN addrSock;addrSock.sin_addr.S_un.S_addr = htonl(INADDR_ANY);addrSock.s

9、in_family = AF_INET;addrSock.sin_port = htons(6000);if(SOCKET_ERROR = bind(m_socket, (SOCKADDR *)&addrSock, sizeof(SOCKADDR)MessageBox("绑定失败");return FALSE;if(SOCKET_ERROR = WSAAsyncSelect(m_socket, m_hWnd, UM_SOCK, FD_READ)MessageBox("注册网络读取事件失败");return FALSE;return TRUE;通过

10、WSASocket()函数，来创建socket套接字建立通信隧道，再用htons来绑定本机的6000端口，即监听端口。（6）要显示客户端接收到来自其他用户的信息，代码设置如下：void CChatRoomDlg:OnSock(WPARAM wParam, LPARAM lParam)switch(LOWORD(lParam)case FD_READ:WSABUF wsabuf;wsabuf.buf = new char200;wsabuf.len = 200;DWORD dwRead;DWORD dwFlag = 0;SOCKADDR_IN addrFrom;int len = sizeof(

11、SOCKADDR);CString str,strTemp;HOSTENT *pHost;if(SOCKET_ERROR = WSARecvFrom(m_socket, &wsabuf, 1, &dwRead, &dwFlag, (SOCKADDR *)&addrFrom, &len, NULL, NULL)MessageBox("接收数据失败");return ;pHost = gethostbyaddr(char *)&addrFrom.sin_addr.S_un.S_addr,4,AF_INET);/str.Format

12、("%s说：%s", inet_ntoa(addrFrom.sin_addr), wsabuf.buf);str.Format("%s说：%s", pHost->h_name, wsabuf.buf);str += "rn"GetDlgItemText(IDC_EDIT_RECV, strTemp);str += strTemp;SetDlgItemText(IDC_EDIT_RECV,str);break;设计步骤： 接受来自服务器套接字的信息数据保存到addrFrom中，调整格式后将其打印到消息区。（7）当本地程序发送信息时

13、调用的功能函数。void CChatRoomDlg:OnBtnSend() / TODO: Add your control notification handler code hereDWORD dwIP;CString strSend;WSABUF wsabuf;DWORD dwSend;int len;CString strHostName;SOCKADDR_IN addrTo;HOSTENT *pHost;if(GetDlgItemText(IDC_EDIT_HOSTNAME, strHostName), strHostName = "")(CIPAddressCt

14、rl *)GetDlgItem(IDC_IPADDRESS1)->GetAddress(dwIP);addrTo.sin_addr.S_un.S_addr = htonl(dwIP);elsepHost = gethostbyname(strHostName);addrTo.sin_addr.S_un.S_addr = *(DWORD *)pHost->h_addr_list0);addrTo.sin_family = AF_INET;addrTo.sin_port = htons(6000);GetDlgItemText(IDC_EDIT_SEND, strSend);len =

15、 strSend.GetLength();wsabuf.buf = strSend.GetBuffer(len);wsabuf.len = len +1;SetDlgItemText(IDC_EDIT_SEND, "");if(SOCKET_ERROR = WSASendTo(m_socket, &wsabuf, 1, &dwSend, 0, (SOCKADDR *)&addrTo, sizeof(SOCKADDR), NULL, NULL)MessageBox("发送数据失败");return;4.系统调试在本地编译-组建-运行

16、后的结果，如图4-1所示：图4-1在远程一台客户端运行同样的程序，在两台客户端中填入对方的IP地址，如图4-2所示：图4-2在编辑框中填写发送的文字信息，如图4-3所示：图4-3发送后，如图4-4、图4-5所示：图4-4图4-5测试成功。5.结果分析通过点到点的连接建立了Socket连接，从而可以进行消息传输。6.总结通过一周的课程设计，让我学会了很多东西，也算能比较熟练地掌握MFC这一个软件了，动手能力增强了不少。源码：ChatRoom.cpp#include "stdafx.h"#include "ChatRoom.h"#include "

17、ChatRoomDlg.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endifBEGIN_MESSAGE_MAP(CChatRoomApp, CWinApp)ON_COMMAND(ID_HELP, CWinApp:OnHelp)END_MESSAGE_MAP()/ CChatRoomApp constructionCChatRoomApp:CChatRoomApp()CChatRoomApp:CChatRoomApp()WSACleanup();/ The on

18、e and only CChatRoomApp objectCChatRoomApp theApp;/ CChatRoomApp initializationBOOL CChatRoomApp:InitInstance()WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD( 2, 2 );err = WSAStartup( wVersionRequested, &wsaData );if ( err != 0 ) /* Tell the user that we could not fi

19、nd a usable */* WinSock DLL. */return FALSE;if ( LOBYTE( wsaData.wVersion ) != 2 | HIBYTE( wsaData.wVersion ) != 2 ) /* Tell the user that we could not find a usable */* WinSock DLL. */WSACleanup( );return FALSE; /* The WinSock DLL is acceptable. Proceed. */AfxEnableControlContainer();#ifdef _AFXDLL

20、Enable3dControls();#elseEnable3dControlsStatic();#endifCChatRoomDlg dlg;m_pMainWnd = &dlg;int nResponse = dlg.DoModal();if (nResponse = IDOK)else if (nResponse = IDCANCEL)return FALSE;ChatRoomDlg.cpp#include "stdafx.h"#include "ChatRoom.h"#include "ChatRoomDlg.h"#if

21、def _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endifclass 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 Do

22、DataExchange(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);

23、/AFX_DATA_MAP(CAboutDlg)/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CAboutDlg, CDialog)/AFX_MSG_MAP(CAboutDlg)/ No message handlers/AFX_MSG_MAPEND_MESSAGE_MAP()/ CChatRoomDlg dialogCChatRoomDlg:CChatRoomDlg(CWnd* pParent /*=NULL*/): CDialog(CChatRoomDlg:IDD, pParent)/AFX_DATA_INIT(CChatRoomDlg)/ NOTE: the ClassW

24、izard will add member initialization here/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);m_socket = 0;CChatRoomDlg:CChatRoomDlg()if(m_socket)closesocket(m_socket);void CChatRoomDlg:DoDataExchange(CDataExchange* pD

25、X)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CChatRoomDlg)/ NOTE: the ClassWizard will add DDX and DDV calls here/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CChatRoomDlg, CDialog)/AFX_MSG_MAP(CChatRoomDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BTN_SEND, OnBtnSend)/AFX_MSG_MAPON_MESS

26、AGE(UM_SOCK, OnSock)END_MESSAGE_MAP()/ CChatRoomDlg message handlersBOOL CChatRoomDlg:OnInitDialog()CDialog:OnInitDialog();ASSERT(IDM_ABOUTBOX & 0xFFF0) = IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX < 0xF000);CMenu* pSysMenu = GetSystemMenu(FALSE);if (pSysMenu != NULL)CString strAboutMenu;strAboutMenu.

27、LoadString(IDS_ABOUTBOX);if (!strAboutMenu.IsEmpty()pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);SetIcon(m_hIcon, TRUE);SetIcon(m_hIcon, FALSE);/ TODO: Add extra initialization hereInitSocket();return TRUE; void CChatRoomDlg:OnSysCommand(UINT n

28、ID, LPARAM lParam)if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout;dlgAbout.DoModal();elseCDialog:OnSysCommand(nID, lParam);void CChatRoomDlg:OnPaint() if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in cl

29、ient 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();HCURSOR CChatRoomDlg:On

30、QueryDragIcon()return (HCURSOR) m_hIcon;BOOL CChatRoomDlg:InitSocket()m_socket = WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);if(INVALID_SOCKET = m_socket)MessageBox("创建套接字失败");return FALSE;SOCKADDR_IN addrSock;addrSock.sin_addr.S_un.S_addr = htonl(INADDR_ANY);addrSock.sin_family = AF_INET;add

31、rSock.sin_port = htons(6000);if(SOCKET_ERROR = bind(m_socket, (SOCKADDR *)&addrSock, sizeof(SOCKADDR)MessageBox("绑定失败");return FALSE;if(SOCKET_ERROR = WSAAsyncSelect(m_socket, m_hWnd, UM_SOCK, FD_READ)MessageBox("注册网络读取事件失败");return FALSE;return TRUE;void CChatRoomDlg:OnSock(

32、WPARAM wParam, LPARAM lParam)switch(LOWORD(lParam)case FD_READ:WSABUF wsabuf;wsabuf.buf = new char200;wsabuf.len = 200;DWORD dwRead;DWORD dwFlag = 0;SOCKADDR_IN addrFrom;int len = sizeof(SOCKADDR);CString str,strTemp;HOSTENT *pHost;if(SOCKET_ERROR = WSARecvFrom(m_socket, &wsabuf, 1, &dwRead, &dwFlag, (SOCKADDR *)&addrFrom, &len, NULL, NULL)MessageBox("接收数据失败");return ;pHost = gethostbyaddr(char *)&addrFrom.sin_addr.S_un.S_addr,4,AF_INET);/str.Format("%s说：%s", ine