VC：简单聊天室程序1 --- 多线程编写网络聊天室程序

最新推荐文章于 2021-01-26 08:35:39 发布

原创最新推荐文章于 2021-01-26 08:35:39 发布 · 1.6k 阅读

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文章标签：

#聊天 #多线程 #网络 #socket #initialization

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本文介绍了一个简单的多线程网络聊天室程序的设计与实现。该程序使用UDP协议进行消息传递，并通过创建独立的接收线程来处理客户端消息，确保了聊天室的实时性和稳定性。

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简单聊天室程序1 --- 多线程编写网络聊天室程序
#define WM_RECVDATA WM_USER+1
ON_MESSAGE(WM_RECVDATA,OnRecvData)

struct RECVPARAM
{
SOCKET sock;
HWND hwnd;
};

BOOL CChatDlg::InitSocket()
{
m_socket=socket(AF_INET,SOCK_DGRAM,0);
if(INVALID_SOCKET==m_socket)
{
MessageBox("套接字创建失败！");
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("绑定失败!");
  return FALSE;
}
return TRUE;

}

BOOL CChatDlg::OnInitDialog()
{
// TODO: Add extra initialization here
InitSocket();
RECVPARAM *pRecvParam=new RECVPARAM;
pRecvParam->sock=m_socket;
pRecvParam->hwnd=m_hWnd;
//创建接收现成 RecvProc
HANDLE hThread=CreateThread(NULL,0,RecvProc,(LPVOID)pRecvParam,0,NULL);
CloseHandle(hThread);
return TRUE; // return TRUE unless you set the focus to a control
}

DWORD WINAPI CChatDlg::RecvProc(LPVOID lpParameter)
{
SOCKET sock=((RECVPARAM*)lpParameter)->sock;
HWND hwnd=((RECVPARAM*)lpParameter)->hwnd;
delete lpParameter; //视频讲述时，遗忘了释放内存的操作。sunxin

SOCKADDR_IN addrFrom;
int len=sizeof(SOCKADDR);

char recvBuf[200];
char tempBuf[300];
int retval;
while(TRUE)
{
  retval=recvfrom(sock,recvBuf,200,0,(SOCKADDR*)&addrFrom,&len);
  if(SOCKET_ERROR==retval)
   break;
  sprintf(tempBuf,"%s说: %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+="\r\n";
str+=strTemp;
SetDlgItemText(IDC_EDIT_RECV,str);
}

void CChatDlg::OnBtnSend()
{
// TODO: Add your control notification handler code here
DWORD 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;
GetDlgItemText(IDC_EDIT_SEND,strSend);
sendto(m_socket,strSend,strSend.GetLength()+1,0,
(SOCKADDR*)&addrTo,sizeof(SOCKADDR));
SetDlgItemText(IDC_EDIT_SEND,"");
}