Created
December 18, 2012 10:32
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极简验证码生成 ImageMagick & MiniMagick
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require 'mini_magick' | |
class CustomAdmin::MiniCaptchaController < CustomAdmin::ApplicationController | |
before_filter :clear_captcha_session, :only => :mini_captcha | |
def mini_captcha | |
send_data( | |
generate_mini_captcha_image, | |
:type => 'image/jpeg', | |
:disposition => 'inline', | |
:filename => 'mini_captcha.jpg') | |
end | |
private | |
# TODO: 在内存中生成验证码图片 | |
def generate_mini_captcha_image(opts = {}) | |
label = SecureRandom.hex(3) | |
session[:captcha] = label | |
image = MiniMagick::Image.new('mini_captcha.jpg') | |
image.run_command("convert -pointsize 16 -kerning 1 +noise Laplacian -undercolor lightgrey label:#{label} mini_captcha.jpg") | |
image.to_blob | |
end | |
end |
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module CustomAdmin | |
module ApplicationHelper | |
def show_mini_captcha | |
raw "<img src='mini_captcha?v=#{Time.now.to_i}'/>" | |
end | |
end | |
end |
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map.namespace :custom_admin do |custom_admin| | |
custom_admin.mini_captcha 'mini_captcha', :controller => 'mini_captcha', :action => 'mini_captcha' | |
end |
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