unfurl.php

<?php

$dir = __DIR__;
require ($dir . '/src/XF.php');

XF::start($dir);
$app = XF::setupApp('XF\Pub\App');

$request = $app->request();

if (!$request->isPost())
{
	header('Content-type: text/plain; charset=utf-8', true, 405);
	echo 'This action is available via POST only.';
	return;
}

header('Content-Type: application/json; charset=UTF-8');
header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");

$resultIds = $request->filter('result_ids', 'array-uint');

if (!$resultIds)
{
	// note: line-break used as a delimiter between responses
	echo json_encode([]) . "\n";
	exit;
}

@set_time_limit(0);
@ob_implicit_flush(1);
@ob_end_flush();

/** @var \XF\Entity\UnfurlResult[] $results */
$results = $app->em()->findByIds('XF:UnfurlResult', $resultIds);

if (!$results || !$results->count())
{
	// note: line-break used as a delimiter between responses
	echo json_encode([]) . "\n";
}

foreach ($results AS $result)
{
	if (!$result->pending)
	{
		continue;
	}

	/** @var \XF\Service\Unfurl\Fetcher $fetcher */
	$fetcher = $app->service('XF:Unfurl\Fetcher', $result);

	if ($fetcher->fetch())
	{
		$response = [
			'html' => $fetcher->render(),
			'success' => true
		];
	}
	else
	{
		$response = [
			'success' => false
		];
	}

	$response['result_id'] = $result->result_id;

	// note: line-break used as a delimiter between responses
	echo json_encode($response) . "\n";
}