74 lines
2.1 KiB
PHP
74 lines
2.1 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* This file is part of Narrowspark.
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*
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* (c) Daniel Bannert <d.bannert@anolilab.de>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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namespace Narrowspark\HttpEmitter;
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use Psr\Http\Message\ResponseInterface;
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final class Util
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{
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/**
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* Private constructor; non-instantiable.
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*
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* @codeCoverageIgnore
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*/
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private function __construct()
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{
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}
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/**
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* Inject the Content-Length header if is not already present.
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*
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* @param \Psr\Http\Message\ResponseInterface $response
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*
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* @return \Psr\Http\Message\ResponseInterface
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*/
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public static function injectContentLength(ResponseInterface $response): ResponseInterface
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{
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// PSR-7 indicates int OR null for the stream size; for null values,
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// we will not auto-inject the Content-Length.
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if (! $response->hasHeader('Content-Length')
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&& $response->getBody()->getSize() !== null
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) {
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$response = $response->withHeader('Content-Length', (string) $response->getBody()->getSize());
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}
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return $response;
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}
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/**
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* Cleans or flushes output buffers up to target level.
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*
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* Resulting level can be greater than target level if a non-removable buffer has been encountered.
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*
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* @param int $maxBufferLevel The target output buffering level
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* @param bool $flush Whether to flush or clean the buffers
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*
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* @return void
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*/
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public static function closeOutputBuffers(int $maxBufferLevel, bool $flush): void
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{
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$status = \ob_get_status(true);
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$level = \count($status);
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$flags = \PHP_OUTPUT_HANDLER_REMOVABLE | ($flush ? \PHP_OUTPUT_HANDLER_FLUSHABLE : \PHP_OUTPUT_HANDLER_CLEANABLE);
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while ($level-- > $maxBufferLevel && (bool) ($s = $status[$level]) && ($s['del'] ?? ! isset($s['flags']) || $flags === ($s['flags'] & $flags))) {
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if ($flush) {
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\ob_end_flush();
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} else {
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\ob_end_clean();
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}
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}
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}
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}
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