<?php
if (!empty($this->context->transport->errorMessage))
{
	\Chibi\HeadersHelper::set('Content-Type', 'text/plain; charset=utf-8');
	echo $this->context->transport->errorMessage;
}
else
{
	$lastModified = filemtime($this->context->transport->filePath);
	$eTag = $this->context->transport->fileHash;
	$ttl = $this->context->transport->cacheDaysToLive * 24 * 3600;

	$ifModifiedSince = isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])
		? $_SERVER['HTTP_IF_MODIFIED_SINCE']
		: false;

	$eTagHeader = isset($_SERVER['HTTP_IF_NONE_MATCH'])
		? trim(trim($_SERVER['HTTP_IF_NONE_MATCH']), '"')
		: false;

	\Chibi\HeadersHelper::set('ETag', '"' . $eTag . '"');
	\Chibi\HeadersHelper::set('Last-Modified', gmdate('D, d M Y H:i:s \G\M\T', $lastModified));
	\Chibi\HeadersHelper::set('Pragma', 'public');
	\Chibi\HeadersHelper::set('Cache-Control', 'public, max-age=' . $ttl);
	\Chibi\HeadersHelper::set('Expires', gmdate('D, d M Y H:i:s \G\M\T', time() + $ttl));

	if (isset($this->context->transport->customFileName))
	{
		\Chibi\HeadersHelper::set(
			'Content-Disposition',
			'inline; filename="' . $this->context->transport->customFileName . '"');
	}

	\Chibi\HeadersHelper::set(
		'Content-Type',
		$this->context->transport->mimeType);

	if (strtotime($ifModifiedSince) == $lastModified or $eTagHeader == $eTag)
	{
		header('HTTP/1.1 304 Not Modified');
		exit;
	}

	readfile($this->context->transport->filePath);
	flush();
}