Node.js

Avoid URLs Matching Any of a Set of Patterns

See more Spider Examples

Demonstrates how to use "avoid patterns" to prevent spidering any URL that matches a wildcarded pattern. This example avoids URLs containing the substrings "java", "python", or "perl". Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var spider = new 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
    spider.Initialize("www.chilkatsoft.com");

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

    //  Avoid URLs matching these patterns:
    spider.AddAvoidPattern("*java*");
    spider.AddAvoidPattern("*python*");
    spider.AddAvoidPattern("*perl*");

    //  Begin crawling the site by calling CrawlNext repeatedly.
    var i;
    for (i = 0; i <= 9; i++) {

        success = spider.CrawlNext();
        if (success == true) {
            //  Show the URL of the page just spidered.
            console.log(spider.LastUrl);
            //  The HTML is available in the LastHtml property
        }
        else {
            //  Did we get an error or are there no more URLs to crawl?
            if (spider.NumUnspidered == 0) {
                console.log("No more URLs to spider");
            }
            else {
                console.log(spider.LastErrorText);
            }

        }

        //  Sleep 1 second before spidering the next URL.
        spider.SleepMs(1000);
    }


}

chilkatExample();