Class: DeathByCaptcha::Recaptcha

Inherits:
Object
  • Object
show all
Defined in:
lib/death_by_captcha/recaptcha.rb

Defined Under Namespace

Classes: CaptchaInvalid, ChallengeFieldMissing, ImageMissing, ResolveFailed, Response

Constant Summary collapse

@@default_options = 
{ report: true }

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(site_id) ⇒ Recaptcha

Returns a new instance of Recaptcha.



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# File 'lib/death_by_captcha/recaptcha.rb', line 13

def initialize( site_id )
  @site_id = site_id
end

Class Method Details

.default_options ⇒ Object 



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# File 'lib/death_by_captcha/recaptcha.rb', line 9

def self.default_options
  @@default_options
end

Instance Method Details

#resolve(opts = {}) ⇒ Object 



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# File 'lib/death_by_captcha/recaptcha.rb', line 17

def resolve( opts = {} )
  options = @@default_options.merge( opts )
  response = nil

  begin
    request = Net::HTTP::Get.new( "/recaptcha/api/challenge?k=#{@site_id}" )
    result = send_request( request )
    matches = result.body.match( /challenge : '([^\']+)',/ )

    # get recaptcha_challenge_field value
    raise ChallengeFieldMissing if matches.nil?
    recaptcha_challenge_field = matches[1]

    # get image
    data = Net::HTTP.get( URI.parse( "http://www.google.com/recaptcha/api/image?c=#{recaptcha_challenge_field}" ) )
    captcha_status = DeathByCaptcha.decode!( data )
    code = captcha_status["text"]
  rescue CaptchaInvalid
    DeathByCaptcha.report( captcha_status["captcha"] ) if options[:report] == true
    raise CaptchaInvalid
  end
  
  return Response.new( captcha_status["text"], recaptcha_challenge_field )
end

#resolve_with_certification(opts = {}) ⇒ Object 



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# File 'lib/death_by_captcha/recaptcha.rb', line 42

def resolve_with_certification( opts = {} )
  options = @@default_options.merge( opts )

  begin
    request = Net::HTTP::Get.new( "/recaptcha/api/noscript?k=#{@site_id}" )
    result = send_request( request )
    doc = Nokogiri::HTML.parse( result.body )
  
    # get recaptcha_challenge_field value
    recaptcha_challenge_field_input = doc.xpath( "//input[@name='recaptcha_challenge_field']" ).first
    raise ChallengeFieldMissing if recaptcha_challenge_field_input.nil? || recaptcha_challenge_field_input.attributes["value"].nil?
  
    # get image
    image_node = doc.xpath( "//center/img" ).first
    raise ImageMissing if image_node.nil? || image_node.attributes["src"].nil?
    data = Net::HTTP.get( URI.parse( "http://www.google.com/recaptcha/api/#{image_node.attributes["src"].value}" ) )
    captcha_status = nil
    code = nil
    begin
      captcha_status = DeathByCaptcha.decode!( data )
      code = captcha_status["text"]
    rescue DeathByCaptcha::RequestError => e
      raise ResolveFailed, e.class.to_s
    rescue DeathByCaptcha::CaptchaDecodeFailed => e
      raise ResolveFailed, e.class.to_s
    end
  
    raise ResolveFailed, "no captcha" if code.nil?
  
    recaptcha_challenge_field = recaptcha_challenge_field_input.attributes["value"].value
    params = { recaptcha_challenge_field: recaptcha_challenge_field, recaptcha_response_field: code, submit: "Je ne suis pas un robot" }
  
    request = Net::HTTP::Post.new( "/recaptcha/api/noscript?k=#{@site_id}" )
    request.set_form_data( params )
    result = send_request( request )
    doc = Nokogiri::HTML.parse( result.body )
    textarea_node = doc.xpath( "//textarea" ).first
  
    raise CaptchaInvalid if textarea_node.nil?
  rescue CaptchaInvalid
    DeathByCaptcha.report( captcha_status["captcha"] ) if options[:report] == true
    raise CaptchaInvalid
  end
  
  return Response.new( captcha_status["text"], textarea_node.inner_text )
end