Ruby

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". Ruby

require 'chilkat'

success = false

spider = Chilkat::CkSpider.new()

# 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.

for i in 0 .. 9

    success = spider.CrawlNext()
    if (success == true)
        # Show the URL of the page just spidered.
        print spider.lastUrl() + "\n";
        # The HTML is available in the LastHtml property
    else
        # Did we get an error or are there no more URLs to crawl?
        if (spider.get_NumUnspidered() == 0)
            print "No more URLs to spider" + "\n";
        else
            print spider.lastErrorText() + "\n";
        end

    end

    # Sleep 1 second before spidering the next URL.
    spider.SleepMs(1000)
end