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Crawl website links #crawl
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| require 'net/http' | |
| require 'uri' | |
| if ARGV[0].nil? | |
| puts "Usage : #{$0} url [output] " | |
| exit | |
| end | |
| class Crawler | |
| attr_reader :url_list | |
| def initialize | |
| @url_list = [] | |
| end | |
| def crawl(url) | |
| urls = extract_urls(url) | |
| queue = urls | |
| while !queue.empty? | |
| puts "analysing #{queue[0]}..\n" | |
| children = extract_urls(queue.shift) | |
| children.each { |u| queue.push(u) unless queue.include? u } | |
| queue.each { |u| @url_list << u unless @url_list.include? u } | |
| break if @url_list.count >= 1000 | |
| end | |
| end | |
| def extract_urls(url) | |
| uri = URI.parse(url) | |
| response = Net::HTTP.get_response(uri) | |
| matches = response.body.scan(/<a .*href=["'](http[^s].*?)["']/) | |
| return matches.flatten | |
| end | |
| end | |
| crawler = Crawler.new | |
| crawler.crawl(ARGV[0]) | |
| puts "\n\nLINKS ARE :\n" | |
| puts crawler.url_list | |
| if (!ARGV[1].nil?) | |
| File.open(ARGV[1], 'w') {|f| f.write(crawler.url_list) } | |
| end |
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