Swoole PHP

<?php

use Swoole\Http\Request;
use Swoole\Http\Response;
use Swoole\Http\Server;

$gif = base64_decode('R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==');

$server = new Server('0.0.0.0', 8080);
$server->set(['http_compression' => false]); // gzip only makes a tiny GIF bigger

$server->on('request', function (Request $request, Response $response) use ($gif) {
    if ($request->server['request_uri'] !== '/pixel.gif') {
        $response->status(404);
        $response->end();
        return;
    }
    $response->header('Content-Type', 'image/gif');
    $response->header('Cache-Control', 'no-store');
    $response->end($gif);
});

$server->start();