@@ -3,8 +3,7 @@ This captcha generator is based on the very fine work of Eric Methot (http://blogs.ericmethot.com/) all credit and thanks should go to him. -This fork fixes an issue that prevents the captcha validation from working -when you generate images in a file format other than PNG. +This fork allows you to specify a file type for captcha image generation (png or gif). Using Captcha is a five step process @@ -62,7 +61,7 @@ Next, generate the images by running the following rake task, this takes a while rake captcha:generate COUNT=250 This will create the '/public/system/captcha' directory if it doesn't -already exist and put 250 randomly generated captcha gifs. +already exist and put 250 randomly generated captcha images. You can specify the following parameters when running the rake task: @@ -70,7 +69,7 @@ COUNT - the number of images to generate, default 3 IMAGE_HEIGHT - the height of the captcha image in pixels, default 50 IMAGE_WIDTH - the width of the captcha image in pixels, default 260 CAPTCHA_LENGTH - the number of characters in the captcha, default 5 - +FILE_FORMAT - the file type of the captcha image (png or gif) == Use the helper methods README @@ -12,28 +12,31 @@ module CaptchaImageGenerator @@default_parameters = { :image_width => 240, :image_height => 50, - :captcha_length => 5 + :captcha_length => 5, + :file_format => 'png' } def self.generate_captcha_image(params = {}) params.reverse_merge!(@@default_parameters) - text_img = Magick::Image.new(params[:image_width], params[:image_height]) - black_img = Magick::Image.new(params[:image_width], params[:image_height]) do + file_format = ['png', 'gif'].include?(params[:file_format]) ? ".#{params[:file_format]}" : '.png' + + text_img = Magick::Image.new(params[:image_width].to_i, params[:image_height].to_i) + black_img = Magick::Image.new(params[:image_width].to_i, params[:image_height].to_i) do self.background_color = 'black' end # Generate a 5 character random string - random_string = (1..params[:captcha_length]).collect { @@eligible_chars[rand(@@eligible_chars.size)] }.join(' ') + random_string = (1..params[:captcha_length].to_i).collect { @@eligible_chars[rand(@@eligible_chars.size)] }.join(' ') # Gerenate the filename based on the string where we have removed the spaces - filename = CaptchaUtil::encrypt_string(random_string.gsub(' ', '').downcase) + '.png' + filename = CaptchaUtil::encrypt_string(random_string.gsub(' ', '').downcase) + file_format # Render the text in the image text_img.annotate(Magick::Draw.new, 0,0,0,0, random_string) { self.gravity = Magick::WestGravity - self.font_family = 'times' + self.font_family = 'Thonburi' self.font_weight = Magick::BoldWeight self.fill = '#666666' self.stroke = 'black' @@ -44,7 +47,7 @@ module CaptchaImageGenerator # Apply a little blur and fuzzing text_img = text_img.gaussian_blur(1.2, 1.2) text_img = text_img.sketch(20, 30.0, 30.0) - text_img = text_img.wave(7, 90) + text_img = text_img.wave(3, 90) # Now we need to get the white out text_mask = text_img.negate lib/captcha_image_generator.rb @@ -19,8 +19,8 @@ namespace :captcha do def resolve_params params = {} - ['IMAGE_WIDTH', 'IMAGE_HEIGHT', 'CAPTCHA_LENGTH'].each do |param| - params[param.downcase.to_sym] = ENV[param].to_i if ENV[param] + ['IMAGE_WIDTH', 'IMAGE_HEIGHT', 'CAPTCHA_LENGTH', 'FILE_FORMAT'].each do |param| + params[param.downcase.to_sym] = ENV[param] if ENV[param] end params end tasks/generate.rake d52a63713b4b18f790c71bde5d3748654814ed29 Corey corey@seologic.com http://github.com/zendesk/captcha/commit/05123e4e11ad3daf57979ee0078f2db92a3e9645 05123e4e11ad3daf57979ee0078f2db92a3e9645 2009-06-17T11:14:10-07:00 2009-06-17T11:14:10-07:00 Accepts FILE_FORMAT argument on rake task to generate images. 1e693f9500525dec563786ffca60f31d8c0fc06a Corey corey@seologic.com