woocommerce/includes/admin/class-wc-admin-addons.php

<?php
/**
 * Addons Page
 *
 * @author 		WooThemes
 * @category 	Admin
 * @package 	WooCommerce/Admin
 * @version     2.1.0
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if ( ! class_exists( 'WC_Admin_Addons' ) ) :

/**
 * WC_Admin_Addons Class
 */
class WC_Admin_Addons {

	/**
	 * Handles output of the reports page in admin.
	 */
	public function output() {

		if ( false === ( $addons = get_transient( 'woocommerce_addons_data' ) ) ) {
			$addons_json = wp_remote_get( 'http://d3t0oesq8995hv.cloudfront.net/woocommerce-addons.json', array( 'user-agent' => 'WooCommerce Addons Page' ) );
			if ( ! is_wp_error( $addons_json ) ) {
				$addons = json_decode( wp_remote_retrieve_body( $addons_json ) );
				if ( $addons ) {
					set_transient( 'woocommerce_addons_data', $addons );
				}
			}
		}

		$view = isset( $_GET['view'] ) ? sanitize_text_field( $_GET['view'] ) : '';

		include_once( 'views/html-admin-page-addons.php' );
	}
}

endif;

return new WC_Admin_Addons();