asciinema.org/app/controllers/asciicasts_controller.rb

class AsciicastsController < ApplicationController

  before_filter :load_resource, :only => [:show, :raw, :edit, :update, :destroy]
  before_filter :ensure_authenticated!, :only => [:edit, :update, :destroy]
  before_filter :ensure_owner!, :only => [:edit, :update, :destroy]

  respond_to :html, :json, :js

  def index
    asciicasts = AsciicastList.new(params[:category], params[:order])

    render locals: {
      asciicast_list: AsciicastListDecorator.new(asciicasts, params[:page])
    }
  end

  def show
    respond_to do |format|
      format.html do
        view_counter.increment(@asciicast, cookies)
        @asciicast = AsciicastDecorator.new(@asciicast)
        respond_with @asciicast
      end

      format.json do
        respond_with @asciicast
      end

      format.js do
        respond_with @asciicast
      end
    end
  end

  def raw
    response.headers.delete('X-Frame-Options')
    @asciicast = AsciicastDecorator.new(@asciicast)
    render :layout => 'raw'
  end

  def edit
  end

  def update
    if @asciicast.update_attributes(params[:asciicast])
      redirect_to asciicast_path(@asciicast),
                  :notice => 'Asciicast was updated.'
    else
      render :edit
    end
  end

  def destroy
    if @asciicast.destroy
      redirect_to profile_path(current_user),
                  :notice => 'Asciicast was deleted.'
    else
      redirect_to asciicast_path(@asciicast),
                  :alert => "Oops, we couldn't remove this asciicast. " \
                            "Try again later."
    end
  end

  private

  def load_resource
    @asciicast = Asciicast.find(params[:id])
  end

  def ensure_owner!
    if current_user != @asciicast.user
      redirect_to asciicast_path(@asciicast), :alert => "You can't do that."
    end
  end

  def view_counter
    @view_counter ||= ViewCounter.new
  end

end