Newbie here.
This is not a question but a report on a work-around for a problem I detected with the gem validates_captcha.
My environment is Windows, Vista, Rails Rails 2.3.5 Ruby 1.8.6 gem 1.3.5 validates_captcha-0.9.6
The problem: validates_captcha is generating a default gif with the word "captcha" in it rather than a captcha with the value of a a random string (the captcha) in it.
The work-around: In module .\lib\validates_captcha\image_generator\simple.rb there is the following module
- - - - - - - - def generate(captcha_code) image_width = captcha_code.length * 20 + 10
cmd = cmd << "convert -size #{image_width}x40 xc:grey84 -background grey84 -fill black "
captcha_code.split(//).each_with_index do |char, i| cmd << " -pointsize #{rand(8) + 15} " cmd << " -weight #{rand(2) == 0 ? '4' : '8'}00 " cmd << " -draw 'text #{5 + 20 * i},#{rand(10) + 20} \"#{char}\"' " end
cmd << " -rotate #{rand(2) == 0 ? '-' : ''}5 -fill grey40 "
captcha_code.size.times do cmd << " -draw 'line #{rand(image_width)},0 #{rand(image_width)},60' " end
cmd << " gif:-"
image_magick_command = cmd.join
`#{image_magick_command}` end - - - - - - - -
The problem appears to be in the line cmd << " gif:-"
replace this with cmd << " gif:c:\tmp\SomeTempFile.gif"
and then read (binary) c:\tmp\SomeTempFile.gif and push that string out instead of `#{image_magick_command}` pumping the output to stdout.
SomeTempFile.gif should probably not be a unique name since several users might want to generate captchas at the same time. I keyed my name off of the captcha code but there may be a better way to do this. If anone has a good solution to this, I'd love to hear it.
Oh, do remember to delete the uniquely named file or your tmp directory will fill up quickly.
It works for me. Your mileage may vary.
