Class: PbaCrawler::Generic

Inherits:
Object
  • Object
show all
Defined in:
lib/pba_crawler/generic.rb

Constant Summary collapse

@@proxies =

list of proxies address

""
@@cursor = 
0
@@proxy = 
nil
@@proxy_list_reload = 
false

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Generic

Returns a new instance of Generic.



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# File 'lib/pba_crawler/generic.rb', line 12

def initialize
  #load proxy list
  @@proxies = Proxy.order(:position)
end

Instance Method Details

#crawl_url(url, use_proxy = true) ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 17

def crawl_url(url,use_proxy=true)

  if use_proxy.eql?(true)

    unless @@proxy_list_reload
      load_proxy_list
    end


    @@proxy = @@proxies.fetch(@@cursor)

    p "#{url}|#{@@proxy.address}|#{@@proxy.port}"

    agent = Mechanize.new { |a|
      a.html_parser = Nokogiri::HTML
      a.open_timeout = 20
      a.read_timeout = 20
    }

    agent.set_proxy(@@proxy.address,@@proxy.port)
    agent.user_agent = 'Mozilla/5.0 (Windows; U; Windows NT 6.1; nl; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13'

    get_url(agent,url)
  else
    agent = Mechanize.new { |a|
      a.html_parser = Nokogiri::HTML
      a.open_timeout = 20
      a.read_timeout = 20
    }
    agent.get(url)
  end
end

#get_current_proxy ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 85

def get_current_proxy
  @@proxy
end

#get_url(agent, url) ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 59

def get_url(agent,url)
  begin
    response = agent.get(url)
    if response
      p "ok"
      @@proxy.update_attributes(:last_request_at => Time.now)
    else
      p "nok"
      response = rescue_get_url(agent,url)
    end
  rescue
    response = rescue_get_url(agent,url)
  end
  response
end

#load_proxy_list ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 89

def load_proxy_list
  #/proxylist.php?port=&type=&ssl=&country=&latency=1000&reliability=9000&sort=reliability&desc=true&pnum=1#table

  url = "http://www.xroxy.com/proxylist.php?port=&type=&ssl=&country=&latency=1000&reliability=9000"

  last_created_proxy = Proxy.order("created_at DESC").first

  if last_created_proxy.nil? || ((Time.now - last_created_proxy.created_at) / 1.hour)>2
    Proxy.delete_all
    begin
      (1..4).each do |index|
        agent = crawl_url("#{url}&pnum=#{index}",false)
        agent.parser.xpath("//a[@title='View this Proxy details']").each do |a|
          address = a.content.strip
          port = a.parent.next.next.children.first.content.strip
          Proxy.create(:address=> address, :port=> port)
        end
        sleep 3
      end
    rescue

    end
    @@proxy_list_reload = true
  else
    @@proxy_list_reload = true
  end
  
end

#load_sample ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 120

def load_sample
  list = [
    ["101.0.6.87","31280"],
    ["109.120.130.2","3128"],
    ["62.215.5.69","8080"],
    ["62.215.5.66","8080"],
    ["212.33.199.19","80"],
    ["196.1.70.201","80"],
    ["194.87.32.233","80"],
    ["94.125.27.20","8080"],
    ["95.66.35.1","80"],
    ["124.164.247.43","3128"],
    ["186.225.98.17","3128"],
    ["122.155.13.135","3128"],
    ["148.81.130.19","80"],
    ["202.129.58.68","80"],
    ["97.100.143.20","27977"],
    ["24.12.13.154","27977"],
    ["200.129.180.61","80"]
  ]
  Proxy.delete_all
  list.each do |add|
    Proxy.create(:address => add[0], :port => add[1].to_i, :last_request_at => Time.now)
  end
end

#next_proxy ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 50

def next_proxy
  if @@cursor + 1 < @@proxies.size
    @@cursor = @@cursor + 1
    true
  else
    false
  end
end

#rescue_get_url(agent, url) ⇒ Object 



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# File 'lib/pba_crawler/generic.rb', line 75

def rescue_get_url(agent,url)
  if @@cursor + 1 < @@proxies.size
    @@cursor = @@cursor + 1
    @@proxy = @@proxies.fetch(@@cursor)
    p "#{url}|#{@@proxy.address}|#{@@proxy.port}"
    agent.set_proxy(@@proxy.address,@@proxy.port)
    response = get_url(agent,url)
   end
end