Getting Started Spidering a Site

This is a very simple "getting started" example for spidering a web site. As you'll see in future examples, the Chilkat Spider library can be used to crawl the Web. For now, we'll concentrate on spidering a single site.

Download Chilkat Spider ActiveX

LOCAL loSpider
LOCAL i
LOCAL lnSuccess

*  The Chilkat Spider component/library is free.
loSpider = CreateObject('Chilkat.Spider')

*  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
loSpider.Initialize("www.chilkatsoft.com")

*  Add the 1st URL:
loSpider.AddUnspidered("http://www.chilkatsoft.com/")

*  Begin crawling the site by calling CrawlNext repeatedly.

FOR i = 0 TO 9

    lnSuccess = loSpider.CrawlNext()
    IF (lnSuccess = 1) THEN
        *  Show the URL of the page just spidered.
        ? loSpider.LastUrl
        *  The HTML is available in the LastHtml property
    ELSE
        *  Did we get an error or are there no more URLs to crawl?
        IF (loSpider.NumUnspidered = 0) THEN
            =MESSAGEBOX("No more URLs to spider")
        ELSE
            =MESSAGEBOX(loSpider.LastErrorText)
        ENDIF

    ENDIF

    *  Sleep 1 second before spidering the next URL.
    loSpider.SleepMs(1000)
NEXT