Lua

Extract HTML Title, Description, Keywords

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This example expands on the "getting started" example by showing how to access the HTML title, description, and keywords within each page spidered. These are the contents of the META tags for keywords, description, and title found in the HTML header. Lua

local chilkat = require("chilkat")

local success = false

local spider = chilkat.Spider.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:add_unspidered("http://www.chilkatsoft.com/")

-- Begin crawling the site by calling CrawlNext repeatedly.
for i = 0, 9 do
    success = spider:crawl_next()
    if success then
        -- Show the URL of the page just spidered.
        print(spider.last_url)

        -- The HTML META keywords, title, and description are available in these properties:
        print(spider.last_html_title)
        print(spider.last_html_description)
        print(spider.last_html_keywords)

        -- The HTML is available in the LastHtml property
    else
        -- Did we get an error or are there no more URLs to crawl?
        if spider.num_unspidered == 0 then
            print("No more URLs to spider")
        else
            print(spider.last_error_text)
        end
    end

    -- Sleep 1 second before spidering the next URL.
    spider:sleep_ms(1000)
end