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Short description Yacaph (pronouced Yakaf) is "Yet Another CAPtcha Helper" for Rails. The difference with this one is that it doesn't need to generate images on the fly nor use any session data: it's completely stateless. Furthermore, the images (generated off-line) blend nicely even with changing background colors.
Description = Yacaph Yacaph, which stands for "Yet Another CAPtcha Helper". It's a lean and mean captcha processor. The reason it's lean is because it doesn't need to create images on the fly nor store any information in the users session. Everything required to validate the captcha is provided by the user request. Using Yacaph is a five step process 1. Install RMagick 2. Install the plugin 3. Generate a bunch of images off-line 4. Use the helper method(s) 5. Validate user input == Install the RMagic Follow the instructions on their site: http://rmagick.rubyforge.org/install-faq.html == Install the Plugin Installing the plugin is as simple as issuing this command from the root of your rails application directory: script/plugin install svn://rubyforge.org//var/svn/yacaph/trunk == Generate a bunch of images off-line The reason why you don't need to generate images on the fly is that they have been generated in advance and all you do is pick one at random. To do this you run the rake task: rake yacaph:generate COUNT=250 This will create the '/public/images/captcha' directory if it doesn't already exist and put 250 randomly generated captcha gifs. This can take a while so you might as well get something to drink. Feel free to toy around with the settings within the yacaph.rb file to get just the right look/size for your images. == Use the helper methods In your forms all you need to do is: <%= yacaph_block %> and add a little bit of CSS styling to get a nice looking captcha validation text field and image. If you don't like the way it's setup then use the other helper methods, which are more granular. == Validate user input In your controller, you will need to do the following: PostController < ApplicationController include YacaphHelper def create ... if yacaph_validated? ... else ... end end end That's it. Did I tell you that it flies? It's really fast (of course it's got nothing to do!) Enjoy! Copyright (c) 2007 Eric Methot, released under the MIT license
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License Ruby's Rails' (MIT) GPL LGPL BSD Apache Artistic PublicDomain BSD-type Free-Trial Free-but-Restricted OpenSource Proprietary Shareware Source-available-proprietary Commercial
Category Assets Controllers Internationalization Misc. Enhancements Model Rails Engines Searching and Queries Security Statistics and Logs Testing View Extensions
