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# ReCAPTCHA
module Ambethia
module ReCaptcha
RECAPTCHA_API_SERVER = 'http://api.recaptcha.net';
RECAPTCHA_API_SECURE_SERVER = 'https://api-secure.recaptcha.net';
RECAPTCHA_VERIFY_SERVER = 'api-verify.recaptcha.net';
SKIP_VERIFY_ENV = ['test']
module Helper
# Your public API can be specified in the +options+ hash or preferably the environment
# variable +RECAPTCHA_PUBLIC_KEY+.
def recaptcha_tags(options = {})
# Default options
key = options[:public_key] ||= ENV['RECAPTCHA_PUBLIC_KEY']
error = options[:error] ||= session[:recaptcha_error]
uri = options[:ssl] ? RECAPTCHA_API_SECURE_SERVER : RECAPTCHA_API_SERVER
xhtml = Builder::XmlMarkup.new :target => out=(''), :indent => 2 # Because I can.
if options[:display]
xhtml.script(:type => "text/javascript"){ xhtml.text! "var RecaptchaOptions = #{options[:display].to_json};\n"}
end
xhtml.script(:type => "text/javascript", :src => "#{uri}/challenge?k=#{key}&error=#{error}") {}
unless options[:noscript] == false
xhtml.noscript do
xhtml.iframe(:src => "#{uri}/noscript?k=#{key}",
:height => options[:iframe_height] ||= 300,
:width => options[:iframe_width] ||= 500,
:frameborder => 0) {}; xhtml.br
xhtml.textarea(:name => "recaptcha_challenge_field", :rows => 3, :cols => 40) {}
xhtml.input :name => "recaptcha_response_field",
:type => "hidden", :value => "manual_challenge"
end
end
raise ReCaptchaError, "No public key specified." unless key
return out
end # recaptcha_tags
end # Helpers
module Controller
# Your private API key must be specified in the environment variable +RECAPTCHA_PRIVATE_KEY+
def verify_recaptcha(model = nil)
return true if SKIP_VERIFY_ENV.include? ENV['RAILS_ENV']
raise ReCaptchaError, "No private key specified." unless ENV['RECAPTCHA_PRIVATE_KEY']
begin
recaptcha = Net::HTTP.post_form URI.parse("http://#{RECAPTCHA_VERIFY_SERVER}/verify"), {
:privatekey => ENV['RECAPTCHA_PRIVATE_KEY'],
:remoteip => request.remote_ip,
:challenge => params[:recaptcha_challenge_field],
:response => params[:recaptcha_response_field]
}
answer, error = recaptcha.body.split.map(&:chomp)
unless answer == 'true'
session[:recaptcha_error] = error
model.errors.add_to_base "Captcha response is incorrect, please try again." if model
return false
else
session[:recaptcha_error] = nil
return true
end
rescue Exception => e
raise ReCaptchaError, e
end
end # verify_recaptcha
end # ControllerHelpers
class ReCaptchaError < StandardError; end
end # ReCaptcha
end # Ambethia
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