Knowledge Base Nr: 00177 videotextcache.cpp - http://www.swe-kaiser.de

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Win32: Cachen von langdauernden Vörgängen (Beispiel Videotextauswertung)

  
void CExtractvtDlg::DoGetTVProg(const char* lpszSender)
{
    CStringArray arPage;

    SYSTEMTIME now;
    ::GetSystemTime(&now);

    CString strCacheFile;

    strCacheFile.Format("c:\\temp\\vt%d.%d.%d%s.txt", now.wYear, now.wMonth, now.wDay, lpszSender);

    int nAttr = ::GetFileAttributes(strCacheFile);
    if (nAttr > 0)
    {
        FILE* fp = fopen(strCacheFile, "rt");
        if (!fp)
        {
            ASSERT(FALSE);
            return;
        }

        char szLine[500] = {0};
        while (fgets(szLine, sizeof(szLine), fp) != NULL)
        {
            arPage.Add(szLine);
        }

        fclose(fp);
    }
    else
    {
        FILE* fp = fopen(strCacheFile, "wt");
        if (!fp)
        {
            ASSERT(FALSE);
            return;
        }

        CVideoTextSupport vtsupp;

        int nFirstPage = 301;
        int nLastPage = 304;
        int nTimeout_ms = 60000;

        int nErr = vtsupp.LoadPage(lpszSender, nFirstPage, nLastPage, arPage, false, nTimeout_ms);
        if (nErr)
        {
            fclose(fp);
            ::DeleteFile(strCacheFile);

            CString str;

            str.Format("ERROR: LoadPage()=>%d", nErr);
            arPage.Add(str);
        }
        else
        {
            for (int n=0; n<arPage.GetSize(); n++)
            {
                if (arPage[n][1] == ' ')
                {
                    arPage.RemoveAt(n);
                    n--;
                }
                else
                {
                    fprintf(fp, arPage[n]);
                }
            }

            fclose(fp);
        }
    }

    m_lb.ResetContent();
    for (int n=0; n<arPage.GetSize()-1; n++)
    {
        CString strLine;

        strLine.Format("%s\t%s\t%s\t%s"
                     , lpszSender
                     , (const char*)arPage[n].Mid(1, 6)
                     , (const char*)arPage[n+1].Mid(1, 6)
                     , (const char*)arPage[n].Mid(14, 23) );

        m_lb.AddString(strLine);
    }
}