#11: http_response

http_response.php

<?php
/**
 * Return canned body content for invalid http requests
 *
 * @see WP_Http::request()
 * 
 * @param array $response The http response.
 * @param array $args An array of arguments.
 * @param string $url The request URL.
 *
 * @return array The filtered http response.
 */
function wpdocs_invalid_request_response( $response, $args, $url ) {
	if ( ! in_array( $response['response']['code'], array( 200, 301, 302 ) ) )
		$response['body'] = __( 'No content found', 'yourtextdomain' );

	return $response;
}
add_filter( 'http_response', 'wpdocs_invalid_request_response', 10, 3 );

http://fotd.werdswords.com/http_response