1197 lines
32 KiB
PHP
1197 lines
32 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\HttpFoundation;
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/**
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* Response represents an HTTP response.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @api
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*/
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class Response
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{
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/**
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* @var \Symfony\Component\HttpFoundation\ResponseHeaderBag
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*/
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public $headers;
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/**
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* @var string
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*/
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protected $content;
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/**
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* @var string
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*/
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protected $version;
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/**
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* @var integer
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*/
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protected $statusCode;
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/**
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* @var string
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*/
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protected $statusText;
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/**
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* @var string
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*/
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protected $charset;
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/**
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* Status codes translation table.
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*
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* The list of codes is complete according to the
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* {@link http://www.iana.org/assignments/http-status-codes/ Hypertext Transfer Protocol (HTTP) Status Code Registry}
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* (last updated 2012-02-13).
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*
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* Unless otherwise noted, the status code is defined in RFC2616.
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*
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* @var array
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*/
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public static $statusTexts = array(
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100 => 'Continue',
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101 => 'Switching Protocols',
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102 => 'Processing', // RFC2518
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200 => 'OK',
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201 => 'Created',
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202 => 'Accepted',
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203 => 'Non-Authoritative Information',
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204 => 'No Content',
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205 => 'Reset Content',
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206 => 'Partial Content',
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207 => 'Multi-Status', // RFC4918
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208 => 'Already Reported', // RFC5842
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226 => 'IM Used', // RFC3229
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300 => 'Multiple Choices',
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301 => 'Moved Permanently',
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302 => 'Found',
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303 => 'See Other',
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304 => 'Not Modified',
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305 => 'Use Proxy',
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306 => 'Reserved',
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307 => 'Temporary Redirect',
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308 => 'Permanent Redirect', // RFC-reschke-http-status-308-07
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400 => 'Bad Request',
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401 => 'Unauthorized',
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402 => 'Payment Required',
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403 => 'Forbidden',
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404 => 'Not Found',
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405 => 'Method Not Allowed',
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406 => 'Not Acceptable',
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407 => 'Proxy Authentication Required',
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408 => 'Request Timeout',
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409 => 'Conflict',
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410 => 'Gone',
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411 => 'Length Required',
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412 => 'Precondition Failed',
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413 => 'Request Entity Too Large',
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414 => 'Request-URI Too Long',
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415 => 'Unsupported Media Type',
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416 => 'Requested Range Not Satisfiable',
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417 => 'Expectation Failed',
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418 => 'I\'m a teapot', // RFC2324
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422 => 'Unprocessable Entity', // RFC4918
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423 => 'Locked', // RFC4918
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424 => 'Failed Dependency', // RFC4918
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425 => 'Reserved for WebDAV advanced collections expired proposal', // RFC2817
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426 => 'Upgrade Required', // RFC2817
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428 => 'Precondition Required', // RFC6585
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429 => 'Too Many Requests', // RFC6585
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431 => 'Request Header Fields Too Large', // RFC6585
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500 => 'Internal Server Error',
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501 => 'Not Implemented',
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502 => 'Bad Gateway',
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503 => 'Service Unavailable',
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504 => 'Gateway Timeout',
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505 => 'HTTP Version Not Supported',
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506 => 'Variant Also Negotiates (Experimental)', // RFC2295
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507 => 'Insufficient Storage', // RFC4918
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508 => 'Loop Detected', // RFC5842
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510 => 'Not Extended', // RFC2774
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511 => 'Network Authentication Required', // RFC6585
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);
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/**
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* Constructor.
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*
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* @param string $content The response content
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* @param integer $status The response status code
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* @param array $headers An array of response headers
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*
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* @throws \InvalidArgumentException When the HTTP status code is not valid
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*
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* @api
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*/
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public function __construct($content = '', $status = 200, $headers = array())
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{
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$this->headers = new ResponseHeaderBag($headers);
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$this->setContent($content);
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$this->setStatusCode($status);
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$this->setProtocolVersion('1.0');
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if (!$this->headers->has('Date')) {
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$this->setDate(new \DateTime(null, new \DateTimeZone('UTC')));
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}
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}
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/**
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* Factory method for chainability
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*
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* Example:
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*
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* return Response::create($body, 200)
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* ->setSharedMaxAge(300);
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*
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* @param string $content The response content
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* @param integer $status The response status code
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* @param array $headers An array of response headers
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*
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* @return Response
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*/
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public static function create($content = '', $status = 200, $headers = array())
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{
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return new static($content, $status, $headers);
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}
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/**
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* Returns the Response as an HTTP string.
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*
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* The string representation of the Response is the same as the
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* one that will be sent to the client only if the prepare() method
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* has been called before.
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*
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* @return string The Response as an HTTP string
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*
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* @see prepare()
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*/
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public function __toString()
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{
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return
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sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText)."\r\n".
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$this->headers."\r\n".
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$this->getContent();
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}
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/**
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* Clones the current Response instance.
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*/
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public function __clone()
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{
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$this->headers = clone $this->headers;
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}
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/**
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* Prepares the Response before it is sent to the client.
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*
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* This method tweaks the Response to ensure that it is
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* compliant with RFC 2616. Most of the changes are based on
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* the Request that is "associated" with this Response.
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*
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* @param Request $request A Request instance
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*
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* @return Response The current response.
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*/
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public function prepare(Request $request)
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{
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$headers = $this->headers;
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if ($this->isInformational() || in_array($this->statusCode, array(204, 304))) {
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$this->setContent(null);
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}
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// Content-type based on the Request
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if (!$headers->has('Content-Type')) {
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$format = $request->getRequestFormat();
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if (null !== $format && $mimeType = $request->getMimeType($format)) {
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$headers->set('Content-Type', $mimeType);
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}
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}
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// Fix Content-Type
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$charset = $this->charset ?: 'UTF-8';
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if (!$headers->has('Content-Type')) {
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$headers->set('Content-Type', 'text/html; charset='.$charset);
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} elseif (0 === strpos($headers->get('Content-Type'), 'text/') && false === strpos($headers->get('Content-Type'), 'charset')) {
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// add the charset
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$headers->set('Content-Type', $headers->get('Content-Type').'; charset='.$charset);
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}
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// Fix Content-Length
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if ($headers->has('Transfer-Encoding')) {
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$headers->remove('Content-Length');
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}
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if ($request->isMethod('HEAD')) {
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// cf. RFC2616 14.13
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$length = $headers->get('Content-Length');
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$this->setContent(null);
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if ($length) {
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$headers->set('Content-Length', $length);
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}
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}
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// Fix protocol
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if ('HTTP/1.0' != $request->server->get('SERVER_PROTOCOL')) {
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$this->setProtocolVersion('1.1');
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}
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// Check if we need to send extra expire info headers
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if ('1.0' == $this->getProtocolVersion() && 'no-cache' == $this->headers->get('Cache-Control')) {
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$this->headers->set('pragma', 'no-cache');
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$this->headers->set('expires', -1);
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}
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$this->ensureIEOverSSLCompatibility($request);
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return $this;
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}
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/**
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* Sends HTTP headers.
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*
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* @return Response
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*/
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public function sendHeaders()
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{
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// headers have already been sent by the developer
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if (headers_sent()) {
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return $this;
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}
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// status
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header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText));
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// headers
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foreach ($this->headers->allPreserveCase() as $name => $values) {
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foreach ($values as $value) {
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header($name.': '.$value, false);
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}
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}
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// cookies
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foreach ($this->headers->getCookies() as $cookie) {
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setcookie($cookie->getName(), $cookie->getValue(), $cookie->getExpiresTime(), $cookie->getPath(), $cookie->getDomain(), $cookie->isSecure(), $cookie->isHttpOnly());
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}
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return $this;
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}
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/**
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* Sends content for the current web response.
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*
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* @return Response
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*/
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public function sendContent()
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{
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echo $this->content;
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return $this;
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}
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/**
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* Sends HTTP headers and content.
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*
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* @return Response
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*
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* @api
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*/
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public function send()
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{
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$this->sendHeaders();
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$this->sendContent();
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if (function_exists('fastcgi_finish_request')) {
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fastcgi_finish_request();
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} elseif ('cli' !== PHP_SAPI) {
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// ob_get_level() never returns 0 on some Windows configurations, so if
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// the level is the same two times in a row, the loop should be stopped.
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$previous = null;
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$obStatus = ob_get_status(1);
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while (($level = ob_get_level()) > 0 && $level !== $previous) {
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$previous = $level;
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if ($obStatus[$level - 1]) {
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if (version_compare(PHP_VERSION, '5.4', '>=')) {
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if (isset($obStatus[$level - 1]['flags']) && ($obStatus[$level - 1]['flags'] & PHP_OUTPUT_HANDLER_REMOVABLE)) {
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ob_end_flush();
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}
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} else {
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if (isset($obStatus[$level - 1]['del']) && $obStatus[$level - 1]['del']) {
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ob_end_flush();
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}
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}
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}
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}
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flush();
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}
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return $this;
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}
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/**
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* Sets the response content.
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*
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* Valid types are strings, numbers, and objects that implement a __toString() method.
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*
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* @param mixed $content
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*
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* @return Response
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*
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* @throws \UnexpectedValueException
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*
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* @api
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*/
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public function setContent($content)
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{
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if (null !== $content && !is_string($content) && !is_numeric($content) && !is_callable(array($content, '__toString'))) {
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throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', gettype($content)));
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}
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$this->content = (string) $content;
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return $this;
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}
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/**
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* Gets the current response content.
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*
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* @return string Content
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*
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* @api
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*/
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public function getContent()
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{
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return $this->content;
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}
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/**
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* Sets the HTTP protocol version (1.0 or 1.1).
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*
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* @param string $version The HTTP protocol version
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*
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* @return Response
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*
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* @api
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*/
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public function setProtocolVersion($version)
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{
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$this->version = $version;
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return $this;
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}
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/**
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* Gets the HTTP protocol version.
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*
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* @return string The HTTP protocol version
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*
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* @api
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*/
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public function getProtocolVersion()
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{
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return $this->version;
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}
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/**
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* Sets the response status code.
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*
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* @param integer $code HTTP status code
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* @param mixed $text HTTP status text
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*
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* If the status text is null it will be automatically populated for the known
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* status codes and left empty otherwise.
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*
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* @return Response
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*
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* @throws \InvalidArgumentException When the HTTP status code is not valid
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*
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* @api
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*/
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public function setStatusCode($code, $text = null)
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{
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$this->statusCode = $code = (int) $code;
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if ($this->isInvalid()) {
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throw new \InvalidArgumentException(sprintf('The HTTP status code "%s" is not valid.', $code));
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}
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if (null === $text) {
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$this->statusText = isset(self::$statusTexts[$code]) ? self::$statusTexts[$code] : '';
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return $this;
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}
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if (false === $text) {
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$this->statusText = '';
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return $this;
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}
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$this->statusText = $text;
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return $this;
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}
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/**
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* Retrieves the status code for the current web response.
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*
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* @return integer Status code
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*
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* @api
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*/
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public function getStatusCode()
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{
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return $this->statusCode;
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}
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/**
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* Sets the response charset.
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*
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* @param string $charset Character set
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*
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* @return Response
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*
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* @api
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*/
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public function setCharset($charset)
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{
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$this->charset = $charset;
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return $this;
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}
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/**
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* Retrieves the response charset.
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*
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* @return string Character set
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*
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* @api
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*/
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public function getCharset()
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{
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return $this->charset;
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}
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/**
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* Returns true if the response is worth caching under any circumstance.
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*
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* Responses marked "private" with an explicit Cache-Control directive are
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* considered uncacheable.
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*
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* Responses with neither a freshness lifetime (Expires, max-age) nor cache
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* validator (Last-Modified, ETag) are considered uncacheable.
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*
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* @return Boolean true if the response is worth caching, false otherwise
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*
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* @api
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*/
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public function isCacheable()
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{
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if (!in_array($this->statusCode, array(200, 203, 300, 301, 302, 404, 410))) {
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return false;
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}
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if ($this->headers->hasCacheControlDirective('no-store') || $this->headers->getCacheControlDirective('private')) {
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return false;
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}
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return $this->isValidateable() || $this->isFresh();
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}
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/**
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* Returns true if the response is "fresh".
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*
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* Fresh responses may be served from cache without any interaction with the
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* origin. A response is considered fresh when it includes a Cache-Control/max-age
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* indicator or Expires header and the calculated age is less than the freshness lifetime.
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*
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* @return Boolean true if the response is fresh, false otherwise
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*
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* @api
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*/
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public function isFresh()
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{
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return $this->getTtl() > 0;
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}
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/**
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* Returns true if the response includes headers that can be used to validate
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* the response with the origin server using a conditional GET request.
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*
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* @return Boolean true if the response is validateable, false otherwise
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*
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* @api
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*/
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public function isValidateable()
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{
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return $this->headers->has('Last-Modified') || $this->headers->has('ETag');
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}
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/**
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* Marks the response as "private".
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*
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* It makes the response ineligible for serving other clients.
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*
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* @return Response
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*
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* @api
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*/
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public function setPrivate()
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{
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$this->headers->removeCacheControlDirective('public');
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$this->headers->addCacheControlDirective('private');
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return $this;
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}
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/**
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* Marks the response as "public".
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*
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* It makes the response eligible for serving other clients.
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*
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* @return Response
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*
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* @api
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*/
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public function setPublic()
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{
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$this->headers->addCacheControlDirective('public');
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$this->headers->removeCacheControlDirective('private');
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return $this;
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}
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/**
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* Returns true if the response must be revalidated by caches.
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*
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* This method indicates that the response must not be served stale by a
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* cache in any circumstance without first revalidating with the origin.
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* When present, the TTL of the response should not be overridden to be
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* greater than the value provided by the origin.
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*
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* @return Boolean true if the response must be revalidated by a cache, false otherwise
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*
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* @api
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*/
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public function mustRevalidate()
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{
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return $this->headers->hasCacheControlDirective('must-revalidate') || $this->headers->has('proxy-revalidate');
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}
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|
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/**
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* Returns the Date header as a DateTime instance.
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*
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* @return \DateTime A \DateTime instance
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*
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* @throws \RuntimeException When the header is not parseable
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*
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* @api
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*/
|
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public function getDate()
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{
|
|
return $this->headers->getDate('Date', new \DateTime());
|
|
}
|
|
|
|
/**
|
|
* Sets the Date header.
|
|
*
|
|
* @param \DateTime $date A \DateTime instance
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setDate(\DateTime $date)
|
|
{
|
|
$date->setTimezone(new \DateTimeZone('UTC'));
|
|
$this->headers->set('Date', $date->format('D, d M Y H:i:s').' GMT');
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the age of the response.
|
|
*
|
|
* @return integer The age of the response in seconds
|
|
*/
|
|
public function getAge()
|
|
{
|
|
if (null !== $age = $this->headers->get('Age')) {
|
|
return (int) $age;
|
|
}
|
|
|
|
return max(time() - $this->getDate()->format('U'), 0);
|
|
}
|
|
|
|
/**
|
|
* Marks the response stale by setting the Age header to be equal to the maximum age of the response.
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function expire()
|
|
{
|
|
if ($this->isFresh()) {
|
|
$this->headers->set('Age', $this->getMaxAge());
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of the Expires header as a DateTime instance.
|
|
*
|
|
* @return \DateTime|null A DateTime instance or null if the header does not exist
|
|
*
|
|
* @api
|
|
*/
|
|
public function getExpires()
|
|
{
|
|
try {
|
|
return $this->headers->getDate('Expires');
|
|
} catch (\RuntimeException $e) {
|
|
// according to RFC 2616 invalid date formats (e.g. "0" and "-1") must be treated as in the past
|
|
return \DateTime::createFromFormat(DATE_RFC2822, 'Sat, 01 Jan 00 00:00:00 +0000');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the Expires HTTP header with a DateTime instance.
|
|
*
|
|
* Passing null as value will remove the header.
|
|
*
|
|
* @param \DateTime|null $date A \DateTime instance or null to remove the header
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setExpires(\DateTime $date = null)
|
|
{
|
|
if (null === $date) {
|
|
$this->headers->remove('Expires');
|
|
} else {
|
|
$date = clone $date;
|
|
$date->setTimezone(new \DateTimeZone('UTC'));
|
|
$this->headers->set('Expires', $date->format('D, d M Y H:i:s').' GMT');
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of seconds after the time specified in the response's Date
|
|
* header when the response should no longer be considered fresh.
|
|
*
|
|
* First, it checks for a s-maxage directive, then a max-age directive, and then it falls
|
|
* back on an expires header. It returns null when no maximum age can be established.
|
|
*
|
|
* @return integer|null Number of seconds
|
|
*
|
|
* @api
|
|
*/
|
|
public function getMaxAge()
|
|
{
|
|
if ($this->headers->hasCacheControlDirective('s-maxage')) {
|
|
return (int) $this->headers->getCacheControlDirective('s-maxage');
|
|
}
|
|
|
|
if ($this->headers->hasCacheControlDirective('max-age')) {
|
|
return (int) $this->headers->getCacheControlDirective('max-age');
|
|
}
|
|
|
|
if (null !== $this->getExpires()) {
|
|
return $this->getExpires()->format('U') - $this->getDate()->format('U');
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the number of seconds after which the response should no longer be considered fresh.
|
|
*
|
|
* This methods sets the Cache-Control max-age directive.
|
|
*
|
|
* @param integer $value Number of seconds
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setMaxAge($value)
|
|
{
|
|
$this->headers->addCacheControlDirective('max-age', $value);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Sets the number of seconds after which the response should no longer be considered fresh by shared caches.
|
|
*
|
|
* This methods sets the Cache-Control s-maxage directive.
|
|
*
|
|
* @param integer $value Number of seconds
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setSharedMaxAge($value)
|
|
{
|
|
$this->setPublic();
|
|
$this->headers->addCacheControlDirective('s-maxage', $value);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the response's time-to-live in seconds.
|
|
*
|
|
* It returns null when no freshness information is present in the response.
|
|
*
|
|
* When the responses TTL is <= 0, the response may not be served from cache without first
|
|
* revalidating with the origin.
|
|
*
|
|
* @return integer|null The TTL in seconds
|
|
*
|
|
* @api
|
|
*/
|
|
public function getTtl()
|
|
{
|
|
if (null !== $maxAge = $this->getMaxAge()) {
|
|
return $maxAge - $this->getAge();
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the response's time-to-live for shared caches.
|
|
*
|
|
* This method adjusts the Cache-Control/s-maxage directive.
|
|
*
|
|
* @param integer $seconds Number of seconds
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setTtl($seconds)
|
|
{
|
|
$this->setSharedMaxAge($this->getAge() + $seconds);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Sets the response's time-to-live for private/client caches.
|
|
*
|
|
* This method adjusts the Cache-Control/max-age directive.
|
|
*
|
|
* @param integer $seconds Number of seconds
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setClientTtl($seconds)
|
|
{
|
|
$this->setMaxAge($this->getAge() + $seconds);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the Last-Modified HTTP header as a DateTime instance.
|
|
*
|
|
* @return \DateTime|null A DateTime instance or null if the header does not exist
|
|
*
|
|
* @throws \RuntimeException When the HTTP header is not parseable
|
|
*
|
|
* @api
|
|
*/
|
|
public function getLastModified()
|
|
{
|
|
return $this->headers->getDate('Last-Modified');
|
|
}
|
|
|
|
/**
|
|
* Sets the Last-Modified HTTP header with a DateTime instance.
|
|
*
|
|
* Passing null as value will remove the header.
|
|
*
|
|
* @param \DateTime|null $date A \DateTime instance or null to remove the header
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setLastModified(\DateTime $date = null)
|
|
{
|
|
if (null === $date) {
|
|
$this->headers->remove('Last-Modified');
|
|
} else {
|
|
$date = clone $date;
|
|
$date->setTimezone(new \DateTimeZone('UTC'));
|
|
$this->headers->set('Last-Modified', $date->format('D, d M Y H:i:s').' GMT');
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns the literal value of the ETag HTTP header.
|
|
*
|
|
* @return string|null The ETag HTTP header or null if it does not exist
|
|
*
|
|
* @api
|
|
*/
|
|
public function getEtag()
|
|
{
|
|
return $this->headers->get('ETag');
|
|
}
|
|
|
|
/**
|
|
* Sets the ETag value.
|
|
*
|
|
* @param string|null $etag The ETag unique identifier or null to remove the header
|
|
* @param Boolean $weak Whether you want a weak ETag or not
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setEtag($etag = null, $weak = false)
|
|
{
|
|
if (null === $etag) {
|
|
$this->headers->remove('Etag');
|
|
} else {
|
|
if (0 !== strpos($etag, '"')) {
|
|
$etag = '"'.$etag.'"';
|
|
}
|
|
|
|
$this->headers->set('ETag', (true === $weak ? 'W/' : '').$etag);
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Sets the response's cache headers (validation and/or expiration).
|
|
*
|
|
* Available options are: etag, last_modified, max_age, s_maxage, private, and public.
|
|
*
|
|
* @param array $options An array of cache options
|
|
*
|
|
* @return Response
|
|
*
|
|
* @throws \InvalidArgumentException
|
|
*
|
|
* @api
|
|
*/
|
|
public function setCache(array $options)
|
|
{
|
|
if ($diff = array_diff(array_keys($options), array('etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public'))) {
|
|
throw new \InvalidArgumentException(sprintf('Response does not support the following options: "%s".', implode('", "', array_values($diff))));
|
|
}
|
|
|
|
if (isset($options['etag'])) {
|
|
$this->setEtag($options['etag']);
|
|
}
|
|
|
|
if (isset($options['last_modified'])) {
|
|
$this->setLastModified($options['last_modified']);
|
|
}
|
|
|
|
if (isset($options['max_age'])) {
|
|
$this->setMaxAge($options['max_age']);
|
|
}
|
|
|
|
if (isset($options['s_maxage'])) {
|
|
$this->setSharedMaxAge($options['s_maxage']);
|
|
}
|
|
|
|
if (isset($options['public'])) {
|
|
if ($options['public']) {
|
|
$this->setPublic();
|
|
} else {
|
|
$this->setPrivate();
|
|
}
|
|
}
|
|
|
|
if (isset($options['private'])) {
|
|
if ($options['private']) {
|
|
$this->setPrivate();
|
|
} else {
|
|
$this->setPublic();
|
|
}
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Modifies the response so that it conforms to the rules defined for a 304 status code.
|
|
*
|
|
* This sets the status, removes the body, and discards any headers
|
|
* that MUST NOT be included in 304 responses.
|
|
*
|
|
* @return Response
|
|
*
|
|
* @see http://tools.ietf.org/html/rfc2616#section-10.3.5
|
|
*
|
|
* @api
|
|
*/
|
|
public function setNotModified()
|
|
{
|
|
$this->setStatusCode(304);
|
|
$this->setContent(null);
|
|
|
|
// remove headers that MUST NOT be included with 304 Not Modified responses
|
|
foreach (array('Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified') as $header) {
|
|
$this->headers->remove($header);
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the response includes a Vary header.
|
|
*
|
|
* @return Boolean true if the response includes a Vary header, false otherwise
|
|
*
|
|
* @api
|
|
*/
|
|
public function hasVary()
|
|
{
|
|
return null !== $this->headers->get('Vary');
|
|
}
|
|
|
|
/**
|
|
* Returns an array of header names given in the Vary header.
|
|
*
|
|
* @return array An array of Vary names
|
|
*
|
|
* @api
|
|
*/
|
|
public function getVary()
|
|
{
|
|
if (!$vary = $this->headers->get('Vary')) {
|
|
return array();
|
|
}
|
|
|
|
return is_array($vary) ? $vary : preg_split('/[\s,]+/', $vary);
|
|
}
|
|
|
|
/**
|
|
* Sets the Vary header.
|
|
*
|
|
* @param string|array $headers
|
|
* @param Boolean $replace Whether to replace the actual value of not (true by default)
|
|
*
|
|
* @return Response
|
|
*
|
|
* @api
|
|
*/
|
|
public function setVary($headers, $replace = true)
|
|
{
|
|
$this->headers->set('Vary', $headers, $replace);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Determines if the Response validators (ETag, Last-Modified) match
|
|
* a conditional value specified in the Request.
|
|
*
|
|
* If the Response is not modified, it sets the status code to 304 and
|
|
* removes the actual content by calling the setNotModified() method.
|
|
*
|
|
* @param Request $request A Request instance
|
|
*
|
|
* @return Boolean true if the Response validators match the Request, false otherwise
|
|
*
|
|
* @api
|
|
*/
|
|
public function isNotModified(Request $request)
|
|
{
|
|
if (!$request->isMethodSafe()) {
|
|
return false;
|
|
}
|
|
|
|
$lastModified = $request->headers->get('If-Modified-Since');
|
|
$notModified = false;
|
|
if ($etags = $request->getEtags()) {
|
|
$notModified = (in_array($this->getEtag(), $etags) || in_array('*', $etags)) && (!$lastModified || $this->headers->get('Last-Modified') == $lastModified);
|
|
} elseif ($lastModified) {
|
|
$notModified = $lastModified == $this->headers->get('Last-Modified');
|
|
}
|
|
|
|
if ($notModified) {
|
|
$this->setNotModified();
|
|
}
|
|
|
|
return $notModified;
|
|
}
|
|
|
|
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
|
|
/**
|
|
* Is response invalid?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isInvalid()
|
|
{
|
|
return $this->statusCode < 100 || $this->statusCode >= 600;
|
|
}
|
|
|
|
/**
|
|
* Is response informative?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isInformational()
|
|
{
|
|
return $this->statusCode >= 100 && $this->statusCode < 200;
|
|
}
|
|
|
|
/**
|
|
* Is response successful?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isSuccessful()
|
|
{
|
|
return $this->statusCode >= 200 && $this->statusCode < 300;
|
|
}
|
|
|
|
/**
|
|
* Is the response a redirect?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isRedirection()
|
|
{
|
|
return $this->statusCode >= 300 && $this->statusCode < 400;
|
|
}
|
|
|
|
/**
|
|
* Is there a client error?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isClientError()
|
|
{
|
|
return $this->statusCode >= 400 && $this->statusCode < 500;
|
|
}
|
|
|
|
/**
|
|
* Was there a server side error?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isServerError()
|
|
{
|
|
return $this->statusCode >= 500 && $this->statusCode < 600;
|
|
}
|
|
|
|
/**
|
|
* Is the response OK?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isOk()
|
|
{
|
|
return 200 === $this->statusCode;
|
|
}
|
|
|
|
/**
|
|
* Is the response forbidden?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isForbidden()
|
|
{
|
|
return 403 === $this->statusCode;
|
|
}
|
|
|
|
/**
|
|
* Is the response a not found error?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isNotFound()
|
|
{
|
|
return 404 === $this->statusCode;
|
|
}
|
|
|
|
/**
|
|
* Is the response a redirect of some form?
|
|
*
|
|
* @param string $location
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isRedirect($location = null)
|
|
{
|
|
return in_array($this->statusCode, array(201, 301, 302, 303, 307, 308)) && (null === $location ?: $location == $this->headers->get('Location'));
|
|
}
|
|
|
|
/**
|
|
* Is the response empty?
|
|
*
|
|
* @return Boolean
|
|
*
|
|
* @api
|
|
*/
|
|
public function isEmpty()
|
|
{
|
|
return in_array($this->statusCode, array(201, 204, 304));
|
|
}
|
|
|
|
/**
|
|
* Check if we need to remove Cache-Control for ssl encrypted downloads when using IE < 9
|
|
*
|
|
* @link http://support.microsoft.com/kb/323308
|
|
*/
|
|
protected function ensureIEOverSSLCompatibility(Request $request)
|
|
{
|
|
if (false !== stripos($this->headers->get('Content-Disposition'), 'attachment') && preg_match('/MSIE (.*?);/i', $request->server->get('HTTP_USER_AGENT'), $match) == 1 && true === $request->isSecure()) {
|
|
if (intval(preg_replace("/(MSIE )(.*?);/", "$2", $match[0])) < 9) {
|
|
$this->headers->remove('Cache-Control');
|
|
}
|
|
}
|
|
}
|
|
}
|