Question

求一段简单的文件传输代码。用C++ socket写的。越简单愈好

Answer 1

Server.cpp 内容如下：

#include "stdafx.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// The one and only application object

CWinApp theApp;

using namespace std;

#define PORT 34000 /// Select any free port you wish

void SendFile(LPCTSTR strFilename)
{
AfxSocketInit(NULL);
CSocket sockSrvr;
sockSrvr.Create(PORT); // Creates our server socket
sockSrvr.Listen(); // Start listening for the client at PORT
CSocket sockRecv;
sockSrvr.Accept(sockRecv); // Use another CSocket to accept the connection

CFile myFile;
if(!myFile.Open(strFilename, CFile::modeRead | CFile::typeBinary))
return;

int myFileLength = myFile.GetLength(); // Going to send the correct File Size

sockRecv.Send(&myFileLength, 4); // 4 bytes long

byte* data = new byte[myFileLength];

myFile.Read(data, myFileLength);

//1024

int iRet ;
iRet = sockRecv.Send(data, myFileLength); //Send the whole thing now
cout << "Ret = " << iRet << endl;

cout << "send file over!" << endl;

myFile.Close();
delete data;

sockRecv.Close();
}

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;

// initialize MFC and print and error on failure
cout << "init send file" << endl;
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
// TODO: change error code to suit your needs
cerr << _T("Fatal Error: MFC initialization failed") << endl;
nRetCode = 1;
}
else
{
//SendFile("C:\\autoexec.bat");
cout << "send file" << endl;
SendFile("I:\\程序.txt");
}

getchar();

return nRetCode;
}

client.cpp 代码如下：
#include "stdafx.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// The one and only application object

CWinApp theApp;

using namespace std;
#define PORT 34000

void GetFile(LPCTSTR strFilename)
{
AfxSocketInit(NULL);
CSocket sockClient;
sockClient.Create();
sockClient.Connect("127.0.0.1", PORT); // "127.0.0.1" is the IP to your server, same port

int dataLength;
sockClient.Receive(&dataLength, 4); //Now we get the File Size first

byte* data = new byte[dataLength];
sockClient.Receive(data, dataLength); //Get the whole thing

CFile destFile(strFilename, CFile::modeCreate | CFile::modeWrite | CFile::typeBinary);

destFile.Write(data, dataLength); // Write it

destFile.Close();

cout << "Recive file over!" << endl;

delete data;
sockClient.Close();

}

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;

// initialize MFC and print and error on failure
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
// TODO: change error code to suit your needs
cerr << _T("Fatal Error: MFC initialization failed") << endl;
nRetCode = 1;
}
else
cout << "recive file start " << endl;
GetFile("I:\\程序copy.txt");
return nRetCode;
}

百度不支持附件，不然可以把工程给你。