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DataFlex Examples

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(DataFlex) Extract HTML Title, Description, Keywords

This example expands on the "getting started" example by showing how to access the HTML title, description, and keywords within each page spidered. These are the contents of the META tags for keywords, description, and title found in the HTML header.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoSpider
    Integer i
    Boolean iSuccess
    String sTemp1
    Integer iTemp1

    Get Create (RefClass(cComChilkatSpider)) To hoSpider
    If (Not(IsComObjectCreated(hoSpider))) Begin
        Send CreateComObject of hoSpider
    End

    //  The spider object crawls a single web site at a time.  As you'll see
    //  in later examples, you can collect outbound links and use them to
    //  crawl the web.  For now, we'll simply spider 10 pages of chilkatsoft.com
    Send ComInitialize To hoSpider "www.chilkatsoft.com"

    //  Add the 1st URL:
    Send ComAddUnspidered To hoSpider "http://www.chilkatsoft.com/"

    //  Begin crawling the site by calling CrawlNext repeatedly.

    For i From 0 To 9

        Get ComCrawlNext Of hoSpider To iSuccess
        If (iSuccess = True) Begin
            //  Show the URL of the page just spidered.
            Get ComLastUrl Of hoSpider To sTemp1
            Showln sTemp1

            //  The HTML META keywords, title, and description are available in these properties:
            Get ComLastHtmlTitle Of hoSpider To sTemp1
            Showln sTemp1
            Get ComLastHtmlDescription Of hoSpider To sTemp1
            Showln sTemp1
            Get ComLastHtmlKeywords Of hoSpider To sTemp1
            Showln sTemp1

            //  The HTML is available in the LastHtml property
        End
        Else Begin
            //  Did we get an error or are there no more URLs to crawl?
            Get ComNumUnspidered Of hoSpider To iTemp1
            If (iTemp1 = 0) Begin
                Showln "No more URLs to spider"
            End
            Else Begin
                Get ComLastErrorText Of hoSpider To sTemp1
                Showln sTemp1
            End

        End

        //  Sleep 1 second before spidering the next URL.
        Send ComSleepMs To hoSpider 1000
    Loop



End_Procedure

 

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