Class: ResponsivePreview::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/responsive_preview/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/responsive_preview/middleware.rb', line 3

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/responsive_preview/middleware.rb', line 7

def call(env)
  request = Rack::Request.new(env)
  status, headers, response = @app.call(env)
  action_controller = env['action_controller.instance']

  if action_controller&.wants_responsive_preview?
    original_response = Array(response.body).join
    body = action_controller.render_to_string(html: original_response, layout: "responsive_preview")
    headers["Content-Length"] = body.bytesize.to_s
    response = [body]
  end

  return [status, headers, response]
end