Laravel 4：独特访客数量的Cookie

Question

I am creating a simple blog in which a user can add, update and view posts. I have implemented the views count functionality in the post that shows the number of views on the post. For that, what I did is:

1. Created an event listener:

   Event::listen('post.viewed', 'PostHandler@updatePostViewsAction');

2. Created the PostHandler and updatePostViewsAction

   class PostHandler
   {
       public function handle()
       {
           // 
       }
   
       public function updatePostViewsAction( $post )
       {
           // Update view counter of post
           $post->views_count = $post->views_count + 1;
           $post->save();
       }
   }
   

This is working fine and the views count is succesfuly being updated. But later on I decided to make the views to be uniquely counted. For this, I have tried using the cookies i.e. create a cookie on users computer, whenever he views a post and increment the views_count . If the users comes back again and views the post again, check if there is a cookie available, if it is available then don't increment the views_count, otherwise increment that. Below is, how I have implemented this:

class PostHandler
{
    public function handle()
    {
        // 
    }

    public function updatePostViewsAction( $post )
    {
        if ( !Cookie::get('post_viewed') ) {
            // Update view counter of post
            $post->views_count = $post->views_count + 1;
            $post->save();
            Cookie::forever('post_viewed', true);
        }
    }
}

But it doesn't seem to work, as the views_count is getting incremented each and every time. Can anyone please tell me, what am I doing wrong here?

Answer 1

In order to save a cookie with Laravel, you are required to send it to the response. However, you can workaround it by sending the cookie to the queue.

public function updatePostViewsAction( $post )
{
    if ( !Cookie::get('post_viewed') ) {
        // Update view counter of post
        $post->views_count = $post->views_count + 1;
        $post->save();
        // Create a cookie before the response and set it for 30 days
        Cookie::queue('post_viewed', true, 60 * 24 * 30);
    }
}

Source from Laravel Docs http://laravel.com/docs/requests#cookies:

Queueing A Cookie For The Next Response

If you would like to set a cookie before a response has been created, use the Cookie::queue() method. The cookie will automatically be attached to the final response from your application.