Go

Avoid URLs Matching Any of a Set of Patterns

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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". Go

    success := false

    spider := chilkat.NewSpider()

    // 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 int
    for i = 0; i <= 9; i++ {

        success = spider.CrawlNext()
        if success == true {
            // Show the URL of the page just spidered.
            fmt.Println(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 {
                fmt.Println("No more URLs to spider")
            } else {
                fmt.Println(spider.LastErrorText())
            }

        }

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


    spider.DisposeSpider()