fnm-recaptcha

= reCAPTCHA

Author:: Jason L Perry (http://ambethia.com) Copyright:: Copyright (c) 2007 Jason L Perry License:: {MIT}[http://creativecommons.org/licenses/MIT/] Info:: http://ambethia.com/recaptcha Git:: http://github.com/ambethia/recaptcha/tree/master Bugs:: http://github.com/ambethia/recaptcha/issues

This plugin adds helpers for the {reCAPTCHA API}[http://recaptcha.net]. In your views you can use the +recaptcha_tags+ method to embed the needed javascript, and you can validate in your controllers with +verify_recaptcha+.

You'll want to add your public and private API keys in the environment variables +RECAPTCHA_PUBLIC_KEY+ and +RECAPTCHA_PRIVATE_KEY+, respectively. You could also specify them in config/environment.rb if you are so inclined (see below). Exceptions will be raised if you call these methods and the keys can't be found.

== Rails Installation

reCAPTCHA for Rails can be installed as a gem:

config.gem "ambethia-recaptcha", :lib => "recaptcha/rails", :source => "http://gems.github.com"

Or, as a standard rails plugin:

script/plugin install git://github.com/ambethia/recaptcha.git

== Merb Installation

reCAPTCHA can also be used in a Merb application when installed as a gem:

dependency "alm-recaptcha", ">=0.2.2.1", :require_as => "recaptcha/merb"

Initial Merb compatability funded by ALM Labs.

== Setting up your API Keys

There are two ways to setup your reCAPTCHA API keys once you {obtain}[http://recaptcha.net/whyrecaptcha.html] a pair. You can pass in your keys as options at runtime, for example:

recaptcha_tags :public_key => '6Lc6BAAAAAAAAChqRbQZcn_yyyyyyyyyyyyyyyyy'

and later,

verify_recaptcha :private_key => '6Lc6BAAAAAAAAKN3DRm6VA_xxxxxxxxxxxxxxxxx'

Or, preferably, you can keep your keys out of your code base by exporting the environment variables mentioned earlier. You might do this in the .profile/rc, or equivalent for the user running your application:

export RECAPTCHA_PUBLIC_KEY = '6Lc6BAAAAAAAAChqRbQZcn_yyyyyyyyyyyyyyyyy' export RECAPTCHA_PRIVATE_KEY = '6Lc6BAAAAAAAAKN3DRm6VA_xxxxxxxxxxxxxxxxx'

If that's not your thing, and dropping things into config/environment.rb is, you can just do:

ENV['RECAPTCHA_PUBLIC_KEY'] = '6Lc6BAAAAAAAAChqRbQZcn_yyyyyyyyyyyyyyyyy' ENV['RECAPTCHA_PRIVATE_KEY'] = '6Lc6BAAAAAAAAKN3DRm6VA_xxxxxxxxxxxxxxxxx'

== +recaptcha_tags+

Some of the options available:

:ssl:: Uses secure http for captcha widget (default +false+) :noscript:: Include content (default +true+) :display:: Takes a hash containing the +theme+ and +tabindex+ options per the API. (default +nil+) :ajax:: Render the dynamic AJAX captcha per the API. (default +false+) :public_key:: Your public API key, takes precedence over the ENV variable (default +nil+) :error:: Override the error code returned from the reCAPTCHA API (default +nil+)

You can also override the html attributes for the sizes of the generated +textarea+ and +iframe+ elements, if CSS isn't your thing. Inspect the source of +recaptcha_tags+ to see these options.

== +verify_recaptcha+

This method returns +true+ or +false+ after processing the parameters from the reCAPTCHA widget. Why isn't this a model validation? Because that violates MVC. Use can use it like this, or how ever you like. Passing in the ActiveRecord object is optional, if you do--and the captcha fails to verify--an error will be added to the object for you to use.

Some of the options available:

:model:: Model to set errors :message:: Custom error message :private_key:: Your private API key, takes precedence over the ENV variable (default +nil+). :timeout:: The number of seconds to wait for reCAPTCHA servers before give up. (default +3+)

respond_to do |format| if verify_recaptcha(:model => @post, :message => 'Oh! It's error with reCAPTCHA!') && @post.save # ... else # ... end end

== TODO

• Remove Rails/ActionController dependencies
• Framework agnostic
• Add some helpers to use in before_filter and what not
• Better documentation