使用CSockets進行檔案傳送

本文配套源碼

這是一對實現在兩台電腦間傳送檔案的函數,我沒有看到過使用CSocket進行檔案傳送的代碼,希望此代碼對你有用.代碼中包含兩個函數,第一個用於伺服器端,第二個用於用戶端.

需要說明的是本文提供的方法並不適用於大型檔案的傳送.

下面給出伺服器端代碼:

void SendFile()
{
#define PORT 34000 /// Select any free port you wish
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;
myFile.Open("C:\\ANYFILE.EXE", CFile::modeRead | CFile::typeBinary);
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);
sockRecv.Send(data, myFileLength); //Send the whole thing now
myFile.Close();
delete data;
sockRecv.Close();
}以下是用戶端代碼 void GetFile()
{
#define PORT 34000 /// Select any free port you wish
AfxSocketInit(NULL);
CSocket sockClient;
sockClient.Create();
// "127.0.0.1" is the IP to your server, same port
sockClient.Connect("127.0.0.1", 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("C:\\temp\\ANYFILE.EXE",
　CFile::modeCreate | CFile::modeWrite | CFile::typeBinary);
destFile.Write(data, dataLength); // Write it
destFile.Close();
delete data;
sockClient.Close();
}

最好確認伺服器端函數在用戶端函數之前運行,本文的代碼可以方便地添加到工程中,解決伺服器/客戶模型中的檔案傳送問題.