在ruby on rails中实现验证码
参考http://blog.csdn.net/sanyking/archive/2007/09/04/1772372.aspx
但noisy_image.rb在linux下会出错，要改为
class NoisyImagerequire 'RMagick'include Magickattr_reader :code, :code_imageJiggle = 15Wobble = 15def initialize(len) chars = ('a'..'z').to_a - ['a','e','i','o','u'] code_array=[] 1.upto(len) {code_array << chars} granite = Magick::ImageList.new('xc:#EDF7E7') canvas = Magick::ImageList.new canvas.new_image(32*len, 50, Magick::TextureFill.new(granite)) text = Magick::Draw.new text.font_family = 'times' text.pointsize = 40 cur = 10 code_array.each{|c| rand(10) > 5 ? rot=rand(Wobble):rot= -rand(Wobble) rand(10) > 5 ? weight = NormalWeight : weight = BoldWeight text.annotate(canvas,0,0,cur,30+rand(Jiggle),c){ self.rotation=rot self.font_weight = weight self.fill = 'green' } cur += 30 } @code = code_array.to_s @code_image = canvas.to_blob{ self.format="JPG" }endend
页:
[1]