class Rack::DevFavicon

Constants

VERSION

Public Class Methods

new(app, options = {}) click to toggle source
# File lib/rack-devfavicon.rb, line 6
def initialize(app, options = {})
  @app = app
end

Public Instance Methods

call(env) click to toggle source
# File lib/rack-devfavicon.rb, line 10
def call(env)
  unless env['PATH_INFO'] =~ %r{\A /favicon\.(?:png|ico) \z}xm
    return @app.call(env)
  end

  env.delete('HTTP_IF_MODIFIED_SINCE') # do not cache the icon file

  status, headers, response = @app.call(env)

  data = ''
  response.each do |buf|
    data << buf
  end

  img = Magick::Image.from_blob(data) do |info|
    info.format = headers['Content-Type'] =~ /png/ ? 'PNG' : 'ICO'
  end[0]
  img = img.quantize(4, Magick::GRAYColorspace)

  [status, headers, [img.to_blob]]
end