Socket传输文件示例（下）

UINT ReceiveDataThread(LPVOID lpParam)

{

         CTzg004Dlg *pDlg=(CTzg004Dlg *)lpParam;

         //保存文件对话框

         CFileDialog dlg(FALSE,NULL,NULL,OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,

                   "所有文件 (*.*)|*.*||");

         while(dlg.DoModal()!=IDOK)

         {

                  AfxMessageBox("选择文件出错，请重新选择！");

         }                

         CString str,str1,str2;

         CSocket  sockRecv;

         sockRecv.Create();

         pDlg->m_CtrlIPSend.GetWindowText(str);//得到发送端IP地址

         pDlg->GetDlgItem(IDC_BUTTON_RECEIVE)->EnableWindow(FALSE);//禁止接收按钮

         while(sockRecv.Connect(str,pDlg->m_iDataPort2)==0)//连接发送方地址，若上网，可改为实际IP地址，端口要跟Server端相同。

         {

                  Sleep(50);

         }

         pDlg->GetDlgItem(IDC_BUTTON_REC_END)->EnableWindow(TRUE);//打开终止接收按钮

         str2=dlg.GetPathName();//得到文件名

         CFile file;

         file.Open(str2, CFile::modeCreate | CFile::modeWrite);

         BOOL bFileFail=FALSE;

         DWORD dwTemp =  0;

         sockRecv.AsyncSelect(0);

         sockRecv.IOCtl( FIONBIO, &dwTemp);//变为阻塞方式

        

         UINT uiLength;

         sockRecv.Receive(&uiLength, 4);//接收发方（Server端）的文件大小

         int  iBufSize = 1024  * 5;

         int  iSize = iBufSize;

         LPBYTE  pBuf = new BYTE[iBufSize];

         int  iNumByte;

         UINT uiTotal = 0;

         while(uiTotal < uiLength)

         {

                   int iEnd=0;

                   //接收端终止

                  if(pDlg->m_bRecEnd)

                   {

                            AfxMessageBox("接收端终止！");

                            goto ExitLable2;

                   }

                   //接收发送端状态数据

                  iNumByte=sockRecv.Receive(&iEnd, sizeof(int));

                  if(iNumByte == SOCKET_ERROR)

                   {

                            AfxMessageBox("接收信号错误！");

                            goto ExitLable2;

                   }

                   //发送端终止

                  if(iEnd==1)

                   {

                            AfxMessageBox("发送端终止！");

                            goto ExitLable2;

                   }

 

                  if((int)(uiLength - uiTotal) < iBufSize)

                            iSize = uiLength - uiTotal;

                   int iCount=0;

                   //读取定长数据

                  while(iCount<iSize)

                   {

                            iNumByte = sockRecv.Receive(pBuf, iSize-iCount);

                            if(iNumByte == SOCKET_ERROR)

                            {

                                     AfxMessageBox("接收错误！");

                                     goto ExitLable2;

                            }

                            iCount+=iNumByte;

                            file.Write(pBuf, iNumByte);

                   }

                   uiTotal += iCount;//以实际接收字节为准

                   //设置接收进度

                  pDlg->m_CtrlProgressRec.SetPos(int(((double)uiTotal/uiLength)*100));

                  str.Format("接收进度：%d%%",int(((double)uiTotal/uiLength)*100));

                   //显示接收进度百分比

                  pDlg->GetDlgItem(IDC_STATIC_REC)->GetWindowText(str1);

                  if(str1!=str)

                            pDlg->GetDlgItem(IDC_STATIC_REC)->SetWindowText(str);

         }

         //接收文件成功

         AfxMessageBox("接收文件成功！");

         bFileFail=TRUE;

ExitLable2:

         delete[] pBuf;

         file.Close();

         //文件接收失败，则删除接收文件

         if(!bFileFail)

         {

                  CFile::Remove( str2 );

         }

         sockRecv.Close();

         pDlg->m_CtrlProgressRec.SetPos(0);//恢复接收进度

         //禁止终止接收按钮

         pDlg->GetDlgItem(IDC_BUTTON_REC_END)->EnableWindow(FALSE);

         //打开接收按钮

         pDlg->GetDlgItem(IDC_BUTTON_RECEIVE)->EnableWindow(TRUE);

         //恢复提示进度

         pDlg->GetDlgItem(IDC_STATIC_REC)->SetWindowText("接收进度：");

         return 0;

}

 

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