GbkToUtf8 Utf8ToGbk PackHttp

void CFunc::GbkToUtf8(CString &strGBK)
{
    int len = MultiByteToWideChar(CP_ACP, , (LPCTSTR)strGBK, -, NULL, );
    unsigned short *wszUtf8 = new unsigned short[len + ];
    memset(wszUtf8, , len *  + );
    MultiByteToWideChar(CP_ACP, , (LPCTSTR)strGBK, -, wszUtf8, len);
    len = WideCharToMultiByte(CP_UTF8, , wszUtf8, -, NULL, , NULL, NULL);
    char *pszUtf8 = new char[len + ];
    memset(pszUtf8, , len + );
    WideCharToMultiByte(CP_UTF8, , wszUtf8, -, pszUtf8, len, NULL, NULL);
    strGBK = (CString)pszUtf8;

    delete []pszUtf8;
    delete []wszUtf8;
    return;
}

void CFunc::Utf8ToGbk(CString &strUtf8)
{
    int len = MultiByteToWideChar(CP_UTF8, , (LPCTSTR)strUtf8, -, NULL, );
    unsigned short *wszGBK = new unsigned short[len + ];
    memset(wszGBK, , len *  + );
    MultiByteToWideChar(CP_UTF8, , (LPCTSTR)strUtf8, -, wszGBK, len);
    len = WideCharToMultiByte(CP_ACP, , wszGBK, -, NULL, , NULL, NULL);
    char *pszGBK = new char[len + ];
    memset(pszGBK, , len + );
    WideCharToMultiByte(CP_ACP, , wszGBK, -, pszGBK, len, NULL, NULL);
    strUtf8 = (CString)pszGBK;

    delete []pszGBK;
    delete []wszGBK;
    return;
}

long CFunc::PackHttp(const char *URL, const char *fileName)
{
    FILE *fp = NULL;
    char *buffer = new char[MAXBUF];
    ULONG nBytesRead = ;
    CString strRead = "";
    ULONG lTotal = ;

    CInternetSession session(NULL, , INTERNET_OPEN_TYPE_DIRECT, NULL, );
    CStdioFile *pFile = NULL;

    memset(buffer, , sizeof(buffer));
    fp = fopen(fileName, "wb");

    try
    {
        pFile = session.OpenURL(URL, , INTERNET_FLAG_TRANSFER_BINARY | INTERNET_FLAG_RELOAD);
        if (!pFile)
        {
            fclose(fp);
            ::DeleteFile(fileName);
            delete []buffer;
            return  -;
        }
        nBytesRead = pFile->Read(buffer, MAXBUF - );
        while (nBytesRead > )
        {
            lTotal += nBytesRead;
            fwrite(buffer, , nBytesRead, fp);
            memset(buffer, , sizeof(buffer));
            nBytesRead = pFile->Read(buffer, MAXBUF - );
        }
    }
    catch (CInternetException *e)
    {
        fclose(fp);
        ::DeleteFile(fileName);
        e->Delete();
        return  - ;
    }
    fclose(fp);
    return lTotal;
}