Class: Rack::CanIUse

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/caniuse.rb

Constant Summary collapse

DefaultOptions = 
{
  features: [],
  redirect: 'http://browsehappy.com/'
}
Base = 
::File.join(::File.dirname(__FILE__), '..', '..')

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ CanIUse

Returns a new instance of CanIUse.



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# File 'lib/rack/caniuse.rb', line 15

def initialize(app, options = {})
  
  options.reverse_merge!(DefaultOptions)
  @app, @options, @features = app, options, {}
  
  options[:features].each do |feature|
    path = ::File.join(Base, 'caniuse', 
    'features-json', feature + '.json')
    unless ::File.readable?(path)
      raise "Invalid feature #{feature}."
    end
    hash = JSON.parse(::File.read(path))
    @features[feature] = hash
  end
  
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/caniuse.rb', line 32

def call(env)
  agent = env['HTTP_USER_AGENT']
  browser = Browser.new(ua: agent,
  accept_language: 'en-us')
  validate_support(browser)
  @app.call(env)
end