局域网文件传输及消息发送

1、?网络程序设计?课程设计报告书题目：局域网文件传输与消息通信专业：网络工程学号：20211423学生姓名：史政法指导教师：魏宁完成日期：2021年06月06日一、题目及要求Window程序设计的根本要求：1 .熟练掌握网络的根本概念和原理；2 .熟练掌握网络编程接口Socket概念及编程原理；3 .掌握基于TCP/IP的Internet编程技术；4 .掌握各种软件开发工具的使用过程及方法.本实例程序的技术要点是：如何从CasyncSocket类派生出自己的WinSock类.理解WinSock类与应用程序框架的关系.重点学习流式套接字对象的使用.处理网络事件的方法.二、系统概要设计1、CSock

2、et类的介绍在MFC中,为了提供面向对象的编程方式而封装了两个WinSock类：一个是CAsyncSocket类,另一个是CSocket类.他们的不同点在于前者使用的是非阻塞模式操作,而后者可以支持阻塞模式的I/O操彳KCSocket类是从CAsyncSocket类中继承来的,他为程序员提供了更高级的抽象性.由于CSocket类和CArchive类一起使用,并且治理了通讯的大多数操作,从而使程序员从网络编程的底层细节中解脱了出来,不必使用CAsyncSocket的一些成员函数和一些WindowsSocketAPI函数来处理通信问题.共同使用CSocket和CArchive类对象进行编程是最简单

3、的WinSock编程模式.下面是使用CSocket类进行网络通信的过程(1) 构造CSocket类对象(2) 用CSocket类对象的Create函数创立WindowsSocket,Create()函数会调用Bind()函数将此函数绑定的指定的地址和端口.(3) Socket创立完毕后,Listen()函数在效劳器端进行监听客户的连接请求.(4) 在这一步,效劳器端调用Accept0函数对客户端发来的请求进行接受和处理,而客户端那么调用Connect()函数向效劳器发出连接请求.(5) 在客户端和效劳器端的数据传输完成后,应该分别在两边销毁创立的CSocket对象.2、编程思路和工程实现用MF

4、CAppWizard新建一个给予对话框的工程,在第三步中添加WindowsSocketS的十穴住.米开【J松件IDCapiiun丁工11人上v/kc+a+ictovfH11IDIDC_STATIC/Ki卡口口in,日于九小siaiiciexiv/kc+a+ictovfIDC_STATIC_SERVPORT,八儿FIJip.萝I在接的in日于九小siaiiciexiv/kc+a*icfovfIDC_STATIC_MSG玄旺1女口Jip.消自日于九4siaiiciexiIDC_MYIP1F3ip叫川binierneiaddIDC_YOURIPip地址inierneiadd幺扃左号木匹priithe

5、xIDC_EDIT_MSG“ULH耳l/euiiuoxhiittcnIDC_BUIIONCONNECT启动npYjjaknuuiiunhiittnnIDC_BUIION_DISCONNE关闭npvjJaknuuiiunIDC_BUTTON_SENDMSGu|y也位UuiiunIDC_BUIION_SEND_FIL友透们思叩望也位Uuiiun土方TTh14ccIDC_BUTTON_STOP1透乂件/吉t./力；王uiv修班UuiiunhiittonIDCANCELnpYjjaknuuiiun进程prucessIDC_PROGRESS_SEND_F支持,建立的程序界面如右图:图1一程序主对话框中的

6、控件属性MessageMapsMemberVariables|Aulomatian|ActiveXEvents|ClassInfo|Control1D&TypeMemberIDCBUTTONDISCONNECTIDCBUTTONSENDFILEIDCBUTTONSENDMSGIDCBUTTONSTOPIDCBUTTONCONNECTIDCEDITMSGCStringmMsgSendIDCMYIPCIPAddressCtrtmMylpIDCPROGRESSSENDFILECProgressCtrlmProgress|lDCYOUHIPClFAddressCtrfmYourlpEmjed：

7、Passname：AddClass.,nieiran:|cFll£tranDlg*AddVariable.DX.JIFiletranDIfl.h,D：l八Filetr注nDlg>cpp二IDCANCELDeleteVariableDescription：maptoCIPAddressCtrlmember0inoluv图2对话框中的控件对象定义相应的成员变量编程思路：首先在对话框中输入要连接的IP地址,然后单击“启动按钮,要连接的主机也做相同的操作,两边都准备完事后,两台计算机就可以消息和文件的传输了.单击“启动按钮时,处理函数启动了监听线程来启动效劳,主要的语句如下：pThre

8、adListen=:AfxBeginThread(_ListenTcpThread,this);点击“发送消息按钮时,处理函数启动了消息发送线程来进行消息的传送,语句如下:pThreadSendMsg=:AfxBeginThread(_SendMsgThread,this);当点击“传送文件按钮时,处理函数启动了文件传输线程来进行文件传输,语句如下:pThreadSendMsg=:AfxBeginThread(_SendFileThread,this);下面主要介绍一下要用到的三个线程和一个文件接收处理函数.首先要产生三个线程对象：CWinThread_ListenTcpThread;CWin

9、Thread_SendFileThread;CWinThread_SendMsgThread;三、系统详细设计1 .监听线程函数UINT_ListenTcpThread(LPVOIDlparam)CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopServer=true)return-1;CSocketsockSrvr;pDlg->m_Potr=PORT;保存当前使用端口,用于关闭intcreateSucceed=sockSrvr.Create(pDlg->m_Potr);if(createSucceed=0)AfxMes

10、sageBox("_ListenTcpThreadCreate错误!"+pDlg->GetError(GetLastError();return-1;intlistenSucceed=sockSrvr.Listen();开始监听if(listenSucceed=0)(AfxMessageBox("_ListenTcpThreadListen错误!"+pDlg->GetError(GetLastError();return-1;CSocketrecSo;SOCKADDR_INclient;intiAddrSize=sizeof(client);

11、intacceptSucceed=sockSrvr.Accept(recSo,(SOCKADDR*)&client,&iAddrSize);接受连接并取得对方IPif(acceptSucceed=0)(AfxMessageBox("_ListenTcpThreadAccept错误!"+pDlg->GetError(GetLastError();return-1;sockSrvr.Close();/关闭charflagFLAG=0;if(recSo.Receive(flag,FLAG)!=2)return-1;pDlg->m_type=flag0;

12、if(pDlg->m_type='D')return0;pThreadListen=:AfxBeginThread(_ListenTcpThread,pDlg);pDlg->ReceiveFileMsg(recSo,client);return0;2 .传送文件线程函数UINT_SendFileThread(LPVOIDlparam)CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopServer=true)return-1;CSocketsockClient;sockClient.Create();CSt

13、ringip;pDlg->m_YourIp.GetWindowText(ip);sockClient.Connect(ip,PORT);首先发送标记F为文件,2intend=0;end=sockClient.Send("F",FLAG);/发送标志是否成功if(end=SOCKET_ERROR)AfxMessageBox("_SendFileThreadSend错误！"+pDlg->GetError(GetLastError();return-1;elseif(end！=2)AfxMessageBox("文件头错误");r

14、eturn-1;/CFilemyFile;FILEINFOmyFileInfo;if(!myFile.Open(pDlg->m_fileName,CFile:modeRead|CFile:typeBinary)return-1;myFileInfo.fileLength=myFile.GetLength();/得到文件大小strcpy(myFileInfo.fileName,myFile.GetFileName();/得到文件名称sockClient.Send(&myFileInfo,sizeof(myFileInfo);发送文件信息pDlg->m_Progress.Set

15、Range32(0,myFileInfo.fileLength);myFile.Seek(0,CFile:begin);charm_bufSIZEFILE=0;CStringstrError;intnum=0;end=0;inttemp=0;for(;)if(pDlg->FileWork=false)pDlg->FileWork=true;pDlg->GetDlgItem(IDCANCEL)->EnableWindow(false);pDlg->GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(false);)n

16、um=myFile.Read(m_buf,SIZEFILE);if(num=0)break;end=sockClient.Send(m_buf,num);temp+=end;pDlg->m_Progress.SetPos(temp);if(pDlg->FileStop=true)pDlg->FileStop=false;pDlg->FileWork=false;break;)if(end=SOCKET_ERROR)AfxMessageBox("_SendFileThreadSend错误!"+pDlg->GetError(GetLastError

17、();break;)pDlg->m_Progress.SetPos(0);CStringstrLocalName;pDlg->GetLocalHostName(strLocalName);CStringstrLocalIP;pDlg->GetIpAddress(strLocalName,strLocalIP);if(temp=myFileInfo.fileLength)AfxMessageBox("文件发送成功");elseAfxMessageBox("文件发送失败");myFile.Close();sockClient.Close()

18、;pDlg->FileWork=false;pDlg->GetDlgItem(IDC_PROGRESS_SEND_FILE)->ShowWindow(SW_HIDE);pDlg->GetDlgItem(IDC_BUTTON_STOP)->EnableWindow(false);pDlg->GetDlgItem(IDCANCEL)->EnableWindow(true);pDlg->GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(true);return0;)3.发送消息线程函数UINT_Sen

19、dMsgThread(LPVOIDlparam)/TCP发送信息线程CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopServer=true)return-1;CSocketsockClient;sockClient.Create();CStringip,strError;pDlg->m_YourIp.GetWindowText(ip);intconn=sockClient.Connect(ip,PORT);if(conn=0)/AfxMessageBox("_SendMsgThreadConnect错误!"

20、;+pDlg->GetError(GetLastError();sockClient.ShutDown(2);sockClient.Close();AfxEndThread(1L);return0;首先发送标记M为信息,2intend=0;end=sockClient.Send("M",FLAG);if(end=SOCKET_ERROR)AfxMessageBox("_SendMsgThreadSend错误!"+pDlg->GetError(GetLastError();return-1;elseif(end!=2)AfxMessageBox

21、("消息头错误");return-1;CStringstrMsg=pDlg->message;end=sockClient.Send(strMsg,strMsg.GetLength();if(end=SOCKET_ERROR)AfxMessageBox("_SendMsgThreadSend错误!"+pDlg->GetError(GetLastError();return-1;inti=0;sockClient.Close();return0;4.文件接收处理函数intCFiletranDlg:SaveYourFile(CSocket&

22、;recSo,SOCKADDR_IN&client)CStringfname;CFileDialogdlg(false);另存文件FILEINFOmyFileInfo;recSo.Receive(&myFileInfo,sizeof(FILEINFO);intfileLength=myFileInfo.fileLength;CStringstrfileIp,strfileName,strfileLength;strfileIp.Format(inet_ntoa(client.sin_addr);strfileName.Format(myFileInfo.fileName);st

23、rfileLength.Format("%f",myFileInfo.fileLength/1024.0);CStringtitle="文件"+strfileName+"大小"+strfileLength+"KB"+"来在"+strfileIp+"是否接受"dlg.m_ofn.lpstrTitle=title;/标题条charfileme500=0;必须足够大小strcpy(fileme,strfileIp+strfileName);dlg.m_ofn.lpstrFile=f

24、ileme;文件名称if(dlg.DoModal()=IDOK)fname=dlg.GetPathName();得到文件名名称、路径GetDlgItem(IDC_PROGRESS_SEND_FILE)->ShowWindow(SW_SHOW);elseGetDlgItem(IDC_PROGRESS_SEND_FILE)->ShowWindow(SW_HIDE);GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(true);GetDlgItem(IDCANCEL)->EnableWindow(true);recSo.Close

25、();return0;charbufSIZEFILE=0;CFilef(fname,CFile:modeCreate|CFile:modeWrite);存文件m_Progress.SetRange32(0,fileLength);intn=0;接受的字节数0表示结束inttemp=0;GetDlgItem(IDCANCEL)->EnableWindow(false);GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(false);for(;)n=recSo.Receive(buf,SIZEFILE);接受if(n=0)/0表示结束bre

26、ak;接受完毕f.Write(buf,n);temp+=n;m_Progress.SetPos(temp);if(FileWork=false)FileWork=true;if(FileStop=true)FileStop=false;FileWork=false;break;f.Close();m_Progress.SetPos(0);if(temp=fileLength)MessageBox("文件接受成功");elseMessageBox("文件接受失败");FileWork=false;GetDlgItem(IDC_PROGRESS_SEND_F

27、ILE)->ShowWindow(SW_HIDE);GetDlgItem(IDC_BUTTON_STOP)->EnableWindow(false);GetDlgItem(IDCANCEL)->EnableWindow(true);GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(true);return0;四、课程设计总结采用多线程方法,利用MFC的CSocket类,可以简单方便的实现计算机用户间的文件传输和消息发送功能.以上的程序在VisualC+6.0环境编译通过,并且在学校机房内(本机和本机、本机和他机之间)测试能到

28、达根本的要求.当然我们可以通过继续增加线程来进一步拓展程序的功能.指导教师评语：成绩：指导教师:添加的代码：#include"stdafx.h"#include"Filetran.h"#include"FiletranDlg.h"#ifdef_DEBUG#definenewDEBUG_NEW#undefTHIS_FILEstaticcharTHIS_FILE口=_FILE_;#endif#definePORT34567#defineSIZEFILE1024#defineFLAG2CWinThread*pThreadSendFile;C

29、WinThread*pThreadListen;CWinThread*pThreadSendMsg;CFiletranDlg二CFiletranDlg(CWnd*pParent/*=NULL*/):CDialog(CFiletranDlg:IDD,pParent)/AFX_DATA_INIT(CFiletranDlg)m_MsgSend=_T("");message=_T("");/AFX_DATA_INIT/NotethatLoadIcondoesnotrequireasubsequentDestroyIconinWin32m_hIcon=AfxGet

30、App()->LoadIcon(IDR_MAINFRAME);FileWork=FileStop=false;StopServer=false;voidCFiletranDlg:DoDataExchange(CDataExchange*pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CFiletranDlg)DDX_Control(pDX,IDC_PROGRESS_SEND_FILE,m_Progress);DDX_Control(pDX,IDC_YOURIP,m_YourIp);DDX_Control(pDX,IDC_MYIP,m_MyIp)

31、;DDX_Text(pDX,IDC_EDIT_MSG,m_MsgSend);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CFiletranDlg,CDialog)/AFX_MSG_MAP(CFiletranDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BUTTONCONNECT,OnButtonconnect)ON_BN_CLICKED(IDC_BUTTON_DISCONNECT,OnButtonDisconnect)ON_BN_CLICKED(IDC_BUTTON_SEND

32、_FILE,OnButtonSendFile)ON_BN_CLICKED(IDC_BUTTON_STOP,OnButtonStop)ON_BN_CLICKED(IDC_BUTTON_SENDMSG,OnButtonSendmsg)/AFX_MSG_MAPEND_MESSAGE_MAP()BOOLCFiletranDlg:OnInitDialog()CDialog:OnInitDialog();ASSERT(IDM_ABOUTBOX&0xFFF0)=IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX<0xF000);CMenu*pSysMenu=GetSystemM

33、enu(FALSE);if(pSysMenu!=NULL)CStringstrAboutMenu;strAboutMenu.LoadString(IDS_ABOUTBOX);if(!strAboutMenu.IsEmpty()pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING,IDM_ABOUTBOX,strAboutMenu);SetIcon(m_hIcon,TRUE);/SetbigiconSetIcon(m_hIcon,FALSE);/SetsmalliconCStringstrLocalName

34、;GetLocalHostName(strLocalName);CStringstrLocalIP;GetIpAddress(strLocalName,strLocalIP);m_MyIp.SetWindowText(strLocalIP);得到本地的ipCStringtext="MyProgramTCP方式；SetWindowText(text);GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(false);/断开不可用GetDlgItem(IDC_BUTTONCONNECT)->EnableWindow(true);/连

35、接可用GetDlgItem(IDC_BUTTON_SEND_FILE)->EnableWindow(false);GetDlgItem(IDC_BUTTON_STOP)->EnableWindow(false);GetDlgItem(IDC_BUTTON_SENDMSG)->EnableWindow(false);returnTRUE;/returnTRUEunlessyousetthefocustoacontrolvoidCFiletranDlg:OnSysCommand(UINTnID,LPARAMlParam)if(nID&0xFFF0)=IDM_ABOUTBO

36、X)CAboutDlgdlgAbout;dlgAbout.DoModal();)else(CDialog:OnSysCommand(nID,lParam);)voidCFiletranDlg:OnPaint()(if(IsIconic()(CPaintDCdc(this);/devicecontextforpaintingSendMessage(WM_ICONERASEBKGND,(WPARAM)dc.GetSafeHdc(),0);intcxIcon=GetSystemMetrics(SM_CXICON);intcyIcon=GetSystemMetrics(SM_CYICON);CRect

37、rect;GetClientRect(&rect);intx=(rect.Width()-cxIcon+1)/2;inty=(rect.Height()-cylcon+1)/2;dc.DrawIcon(x,y,m_hlcon);).else(CDialog:OnPaint();)HCURSORCFiletranDlg:OnQueryDragIcon()(return(HCURSOR)m_hIcon;).UINT_ListenTcpThread(LPVOIDlparam)(.CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopS

38、erver=true)return-1;CSocketsockSrvr;pDlg->m_Potr=PORT;/保存当前使用端口,用于关闭intcreateSucceed=sockSrvr.Create(pDlg->m_Potr);if(createSucceed=0)(AfxMessageBox("_ListenTcpThreadCreate错误!"+pDlg->GetError(GetLastError();return-1;)intlistenSucceed=sockSrvr.Listen();开始监听if(listenSucceed=0)AfxMes

39、sageBox("_ListenTcpThreadListen错误!"+pDlg->GetError(GetLastError();return-1;)CSocketrecSo;SOCKADDR_INclient;intiAddrSize=sizeof(client);intacceptSucceed=sockSrvr.Accept(recSo,(SOCKADDR*)&client,&iAddrSize);if(acceptSucceed=0)AfxMessageBox("_ListenTcpThreadAccept错误!"+pDl

40、g->GetError(GetLastError();return-1;)sockSrvr.Close();/厌闭charflagFLAG=0;if(recSo.Receive(flag,FLAG)!=2)return-1;pDlg->m_type=flag0;if(pDlg->m_type='D')return0;pThreadListen=:AfxBeginThread(_ListenTcpThread,pDlg);pDlg->ReceiveFileMsg(recSo,client);return0;UINT_SendFileThread(LPVOI

41、Dlparam)CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopServer=true)return-1;CSocketsockClient;sockClient.Create();CStringip;pDlg->m_YourIp.GetWindowText(ip);sockClient.Connect(ip,PORT);/首先发送标记F为文件,2intend=0;end=sockClient.Send("F",FLAG);/发送标志是否成功if(end=SOCKET_ERROR)(AfxMessageB

42、ox("_SendFileThreadSend错误!"+pDlg->GetError(GetLastError();return-1;elseif(end!=2)(AfxMessageBox("文件头错误");return-1;CFilemyFile;FILEINFOmyFileInfo;if(!myFile.Open(pDlg->m_fileName,CFile二modeRead|CFile二typeBinary)return-1;myFileInfo.fileLength=myFile.GetLength();/得到文件大小strcpy(

43、myFileInfo.fileName,myFile.GetFileName();/得到文件名称sockClient.Send(&myFileInfo,sizeof(myFileInfo);发送文件信息pDlg->m_Progress.SetRange32(0,myFileInfo.fileLength);myFile.Seek(0,CFile:begin);charm_bufSIZEFILE=0;CStringstrError;intnum=0;end=0;inttemp=0;for(;)if(pDlg->FileWork=false)pDlg->FileWork=

44、true;pDlg->GetDlgItem(IDCANCEL)->EnableWindow(false);pDlg->GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(false);num=myFile.Read(m_buf,SIZEFILE);if(num=0)break;end=sockClient.Send(m_buf,num);temp+=end;pDlg->m_Progress.SetPos(temp);if(pDlg->FileStop=true)pDlg->FileStop=false;pDl

45、g->FileWork=false;break;)if(end=SOCKET_ERROR)(AfxMessageBox("_SendFileThreadSend错误!"+pDlg->GetError(GetLastError();break;)pDlg->m_Progress.SetPos(0);CStringstrLocalName;pDlg->GetLocalHostName(strLocalName);CStringstrLocalIP;pDlg->GetIpAddress(strLocalName,strLocalIP);if(temp

46、=myFileInfo.fileLength)AfxMessageBox("文件发送成功");elseAfxMessageBox("文件发送失败");myFile.Close();sockClient.Close();pDlg->FileWork=false;pDlg->GetDlgItem(IDC_PROGRESS_SEND_FILE)->ShowWindow(SW_HIDE);pDlg->GetDlgItem(IDC_BUTTON_STOP)->EnableWindow(false);pDlg->GetDlgIte

47、m(IDCANCEL)->EnableWindow(true);pDlg->GetDlgItem(IDC_BUTTON_DISCONNECT)->EnableWindow(true);return0;)UINT_SendMsgThread(LPVOIDlparam)/TCP发送信息线程(CFiletranDlg*pDlg=(CFiletranDlg*)lparam;if(pDlg->StopServer=true)return-1;CSocketsockClient;sockClient.Create();CStringip,strError;pDlg->m_Yo

48、urIp.GetWindowText(ip);intconn=sockClient.Connect(ip,PORT);if(conn=0)/(AfxMessageBox("_SendMsgThreadConnect错误!"+pDlg->GetError(GetLastError();sockClient.ShutDown(2);sockClient.Close();AfxEndThread(1L);return0;)/首先发送标记M为信息,2intend=0;end=sockClient.Send("M",FLAG);if(end=SOCKET_E

49、RROR)AfxMessageBox("_SendMsgThreadSend错误!"+pDlg->GetError(GetLastError();return-1;)elseif(end!=2)AfxMessageBox("消息头错误");return-1;)CStringstrMsg=pDlg->message;end=sockClient.Send(strMsg,strMsg.GetLength();if(end=SOCKET_ERROR)AfxMessageBox("_SendMsgThreadSend错误!"+pD

50、lg->GetError(GetLastError();return-1;)inti=0;sockClient.Close();return0;)intCFiletranDlg:GetLocalHostName(CString&sHostName)charszHostName256;intnRetCode;nRetCode=gethostname(szHostName,sizeof(szHostName);if(nRetCode!=0)sHostName=_T('没有取得!");returnGetLastError();)sHostName=szHostName;return0;)intCFiletranDlg:GetIpAddress(constCString&sHostName,CString&sIpAddress)HOSTENT*pHe;pHe=gethostbyname(sHostName);structin_addrinAddr;inAddr.s_addr=*(unsignedlong*)pHe->h_addr_list0);sIpAddress=inet_ntoa(inAddr);if(sIpAddress.IsEmpty()sIpAddress=_T