golden hour

/var/www/html/wp-content/plugins/query-monitor/dispatchers

File/Folder	Size	Actions
AJAX.php	2.11 KB
Html.php	21.25 KB
REST.php	1.82 KB
REST_Envelope.php	1.56 KB
Redirect.php	1.77 KB
WP_Die.php	3.5 KB

Edit: AJAX.php

<?php
/**
 * Ajax request dispatcher.
 *
 * @package query-monitor
 */

defined( 'ABSPATH' ) || exit;

class QM_Dispatcher_AJAX extends QM_Dispatcher {

public $id = 'ajax';

public function __construct( QM_Plugin $qm ) {
		parent::__construct( $qm );

// This dispatcher needs to run on a priority lower than 1 so it can output
		// its headers before wp_ob_end_flush_all() flushes all the output buffers:
		// https://github.com/WordPress/wordpress-develop/blob/0a3a3c5119897c6d551a42ae9b5dbfa4f576f2c9/src/wp-includes/default-filters.php#L382
		add_action( 'shutdown', array( $this, 'dispatch' ), 0 );
	}

public function init() {

if ( ! self::user_can_view() ) {
			return;
		}

if ( QM_Util::is_ajax() ) {
			// Start an output buffer for Ajax requests so headers can be output at the end:
			ob_start();
		}

parent::init();
	}

public function dispatch() {

if ( ! $this->should_dispatch() ) {
			return;
		}

$this->before_output();

foreach ( $this->get_outputters( 'headers' ) as $id => $output ) {
			$output->output();
		}

$this->after_output();

}

protected function before_output() {

require_once $this->qm->plugin_path( 'output/Headers.php' );

foreach ( glob( $this->qm->plugin_path( 'output/headers/*.php' ) ) as $file ) {
			require_once $file;
		}
	}

protected function after_output() {

# flush once, because we're nice
		if ( ob_get_length() ) {
			ob_flush();
		}

}

public function is_active() {

if ( ! QM_Util::is_ajax() ) {
			return false;
		}

if ( ! self::user_can_view() ) {
			return false;
		}

# If the headers have already been sent then we can't do anything about it
		if ( headers_sent() ) {
			return false;
		}

# Don't process if the minimum required actions haven't fired:
		if ( is_admin() ) {
			if ( ! did_action( 'admin_init' ) ) {
				return false;
			}
		} else {
			if ( ! did_action( 'wp' ) ) {
				return false;
			}
		}

return true;

}

function register_qm_dispatcher_ajax( array $dispatchers, QM_Plugin $qm ) {
	$dispatchers['ajax'] = new QM_Dispatcher_AJAX( $qm );
	return $dispatchers;
}

add_filter( 'qm/dispatchers', 'register_qm_dispatcher_ajax', 10, 2 );