Visual FoxPro

Getting Started Spidering a Site

See more Spider Examples

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. Visual FoxPro

LOCAL lnSuccess
LOCAL loSpider
LOCAL i

lnSuccess = 0

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
            ? "No more URLs to spider"
        ELSE
            ? loSpider.LastErrorText
        ENDIF

    ENDIF

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

RELEASE loSpider