textcaptcha¶ ↑

textcaptcha utilizies the textcaptcha.com API to help prevent SPAM. The idea behind the library is to be framework agnostic.

Configuring¶ ↑

If you’ve not yet obtained an API key for textcaptcha.com, do so at textcaptcha.com/register.

Textcaptcha.configure do |config|
  config.api_key = 'yourapikeyhere'
end

Retrieving a textCAPTCHA¶ ↑

captcha = Textcaptcha.obtain
  # => { :question => "What's eight - 7?", :answers => [ "c4ca4238a0b923820dcc509a6f75849b", "f97c5d29941bfb1b2fdab0874906ab82" ] }

Validating an answer¶ ↑

Validate the user’s answer compared to the answers retrieved from Textcaptcha.obtain

captcha = Textcaptcha.obtain
  # => { :question => "What's eight - 7?", :answers => [ "c4ca4238a0b923820dcc509a6f75849b", "f97c5d29941bfb1b2fdab0874906ab82" ] }
Textcaptcha.valid? 'sixteen', captcha[:answers]
  # => false

Rails 3 Implementation¶ ↑

Since textcaptcha remains framework agnostic, there’s a bit more work to implement it, yet minimal.

On the sign up form, retrieve the question and answer(s).

# app/controllers/users_controller.rb
# GET /users/new
def new
  Textcaptcha.configure do |config|
    config.api_key = 'yourapikeyhere'
  end

  captcha                   = Textcaptcha.obtain
  session[:captcha_answers] = captcha[:answers]
  @captcha_question         = captcha[:question]
  @user                     = User.new
end

# POST /users
def create
  user = User.new(params[:user])
  if Textcaptcha.valid?(params[:captcha_answer], session[:captcha_answers]) && user.save
    # ...
  end
end

In your view.

# app/views/users/new.html.erb
<%= label_tag 'captcha_answer', @captcha_question %>
<%= text_field_tag 'captcha_answer' %>

Contributing¶ ↑

Be a hero in helping with the battle against spam.

Fork
Write test(s)
Implement
Submit pull request