关于VC实现资源下载的问题

[yeching]

有一个资源地址，如http://www.dd1314.com/dingdingyinyue/20065532148361.mp3，
如何用C++实现 将该资源下载下来？

[waizqfor]

[Quote=引用楼主 yeching 的帖子:]
有一个资源地址，如http://www.dd1314.com/dingdingyinyue/20065532148361.mp3，
如何用C++实现 将该资源下载下来？
[/Quote]
其实就是Http下载文件 通过协议来看就可以了
或者是TCP那种的SOCKET文件传输

//****************************************************************************************//

//函数 CDoUpdateDlg::DownFile

//主要功能: 

//参数列表: 

//         1、CString strUrl：是文件的URL地址

//         2、strFile：文件名

//         3、CString strPath：是存放到本地的路径

//返回值: 

//备注: 

//****************************************************************************************//

bool DownFile(CString strUrl, CString strFile, CString strPath)

{

    m_nCurFileSize = 0;

    bool bRet = false;

    CString strSentence;

    CInternetSession sess;//Create session

    CHttpFile* fileGet;

    CException* e;

    TRY

    {

        fileGet=(CHttpFile*)sess.OpenURL(strUrl);//Open file

    }

    CATCH_ALL(e)

    {

        fileGet = 0;

        return false;

    }

    END_CATCH_ALL
    DWORD dwStatus;
    DWORD dwBuffLen = sizeof(dwStatus);
    if(fileGet)
    {
        BOOL bSuccess = fileGet->QueryInfo(
            HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER,
            &dwStatus, &dwBuffLen);
        m_nCurFilePos = 0;
        char buffer[1024 * 4   1];
        unsigned long nSize = 1024 * 4;
        int n = 0;
        if( bSuccess && dwStatus >= 200 && dwStatus < 300 ) 
        {
            fileGet->QueryInfo(HTTP_QUERY_CONTENT_LENGTH|HTTP_QUERY_FLAG_NUMBER, &dwStatus, &dwBuffLen);
            m_nCurFileSize = dwStatus;
            char szFileName[1024];
            GetAppPath(szFileName, 1024);
            strcpy(szFileName, strPath);
            strcat(szFileName, strFile);
            FILE *f;
            f = fopen(szFileName, "wb");
            if(f == NULL)
            {
                fileGet->Close();
                delete fileGet;
                return false;
            }
            if(m_nCurFileSize < nSize)
                nSize = m_nCurFileSize;
            int nCount = fileGet->Read(buffer, nSize);
            unsigned long nDownLen = 0;
            while(nCount > 0)
            {
                nDownLen  = nCount;
                m_nCurFilePos  = nCount;
                CDC *pDC = GetDC();
                DrawDownProcess(pDC);
                ReleaseDC(pDC);
                fwrite(buffer, sizeof(char), nCount, f);
                nCount = fileGet->Read(buffer, nSize);
            }
            fclose(f);
            if(m_nCurFileSize > nDownLen)
                bRet = false;
            else
                bRet = true;
        }
        fileGet->Close();
        delete fileGet;
    }
    else
    {
        TRACE0("对不起，连接超时，无法打开站点！");
        bRet = false;
    }
    sess.Close();
    return bRet;
}