Class: Apollo::Crawler::StackoverflowCrawler

Inherits:
BaseCrawler
  • Object
show all
Defined in:
lib/apollo_crawler/crawler/stackoverflow_crawler.rb

Constant Summary collapse

@@MATCHER_ITEM = 
"//div[@class = 'summary']/h3/a"

Instance Method Summary collapse

Methods inherited from BaseCrawler

create_metadoc, #enqueue_url, #etl, fetch, #fetch_document, #initialize, name_re, #process_url, try_get_doc, try_get_url, #url_processed?

Constructor Details

This class inherits a constructor from Apollo::Crawler::BaseCrawler

Instance Method Details

#extract_data(doc) ⇒ Object 



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# File 'lib/apollo_crawler/crawler/stackoverflow_crawler.rb', line 36

def extract_data(doc)
	res = doc.xpath(@@MATCHER_ITEM).map { |node|
		url = BaseCrawler.try_get_url(self.url, node['href']).to_s
		next if url.nil?

		{ 
			:text => node.text,
			:link => url
		}
	}

	return res
end

#extract_links(doc) ⇒ Object 



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# File 'lib/apollo_crawler/crawler/stackoverflow_crawler.rb', line 50

def extract_links(doc)
	res = doc.xpath("(//div[@class = 'pager fl']/a)[last()]").map { |node|
		url = BaseCrawler.try_get_url(self.url, node['href']).to_s
		next if url.nil?

		{ 
			:link => url
		}
	}
	
	return res.uniq
end

#name ⇒ Object 



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# File 'lib/apollo_crawler/crawler/stackoverflow_crawler.rb', line 28

def name()
	return "Stackoverflow"
end

#url ⇒ Object 



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# File 'lib/apollo_crawler/crawler/stackoverflow_crawler.rb', line 32

def url()
	return "http://stackoverflow.com/questions"
end