Avoid URLs Matching Any of a Set of Patterns

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".

Download Chilkat Spider ActiveX

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  The Chilkat Spider component/library is free.
set spider = Server.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
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 = 0 To 10

    success = spider.CrawlNext()
    If (success = 1) Then
        '  Show the URL of the page just spidered.
        Response.Write spider.LastUrl & "<br>"
        '  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) Then
            Response.Write "No more URLs to spider" & "<br>"
        Else
            Response.Write spider.LastErrorText & "<br>"
        End If

    End If

    '  Sleep 1 second before spidering the next URL.
    spider.SleepMs 1000
Next


%>
</body>
</html>

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