Chilkat Examples

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PureBasic Examples

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(PureBasic) 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 PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkSpider.pb"

Procedure ChilkatExample()

    spider.i = CkSpider::ckCreate()
    If spider.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  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
    CkSpider::ckInitialize(spider,"www.chilkatsoft.com")

    ;  Add the 1st URL:
    CkSpider::ckAddUnspidered(spider,"http://www.chilkatsoft.com/")

    ;  Begin crawling the site by calling CrawlNext repeatedly.
    i.i
    For i = 0 To 9
        success.i
        success = CkSpider::ckCrawlNext(spider)
        If success = 1
            ;  Show the URL of the page just spidered.
            Debug CkSpider::ckLastUrl(spider)

            ;  The HTML META keywords, title, and description are available in these properties:
            Debug CkSpider::ckLastHtmlTitle(spider)
            Debug CkSpider::ckLastHtmlDescription(spider)
            Debug CkSpider::ckLastHtmlKeywords(spider)

            ;  The HTML is available in the LastHtml property
        Else
            ;  Did we get an error or are there no more URLs to crawl?
            If CkSpider::ckNumUnspidered(spider) = 0
                Debug "No more URLs to spider"
            Else
                Debug CkSpider::ckLastErrorText(spider)
            EndIf

        EndIf

        ;  Sleep 1 second before spidering the next URL.
        CkSpider::ckSleepMs(spider,1000)
    Next


    CkSpider::ckDispose(spider)


    ProcedureReturn
EndProcedure

 

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