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<?php |
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|
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/** |
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* This file is part of the Nette Framework (https://nette.org) |
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* Copyright (c) 2004 David Grudl (https://davidgrudl.com) |
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*/ |
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declare (strict_types=1); |
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namespace Packetery\Nette\Http; |
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|
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use Packetery\Nette; |
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/** |
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* HTTP-specific tasks. |
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*/ |
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class Context |
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{ |
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use \Packetery\Nette\SmartObject; |
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/** @var IRequest */ |
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private $request; |
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/** @var IResponse */ |
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private $response; |
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public function __construct(IRequest $request, IResponse $response) |
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{ |
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$this->request = $request; |
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$this->response = $response; |
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} |
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/** |
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* Attempts to cache the sent entity by its last modification date. |
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* @param string|int|\DateTimeInterface $lastModified |
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*/ |
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public function isModified($lastModified = null, ?string $etag = null) : bool |
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{ |
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if ($lastModified) { |
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$this->response->setHeader('Last-Modified', Helpers::formatDate($lastModified)); |
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} |
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if ($etag) { |
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$this->response->setHeader('ETag', '"' . \addslashes($etag) . '"'); |
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} |
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$ifNoneMatch = $this->request->getHeader('If-None-Match'); |
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if ($ifNoneMatch === '*') { |
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$match = \true; |
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// match, check if-modified-since |
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} elseif ($ifNoneMatch !== null) { |
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$etag = $this->response->getHeader('ETag'); |
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if ($etag === null || \strpos(' ' . \strtr($ifNoneMatch, ",\t", ' '), ' ' . $etag) === \false) { |
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return \true; |
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} else { |
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$match = \true; |
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// match, check if-modified-since |
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} |
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} |
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$ifModifiedSince = $this->request->getHeader('If-Modified-Since'); |
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if ($ifModifiedSince !== null) { |
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$lastModified = $this->response->getHeader('Last-Modified'); |
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if ($lastModified !== null && \strtotime($lastModified) <= \strtotime($ifModifiedSince)) { |
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$match = \true; |
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} else { |
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return \true; |
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} |
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} |
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if (empty($match)) { |
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return \true; |
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} |
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$this->response->setCode(IResponse::S304_NotModified); |
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return \false; |
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} |
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public function getRequest() : IRequest |
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{ |
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return $this->request; |
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} |
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public function getResponse() : IResponse |
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{ |
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return $this->response; |
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} |
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} |
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