1431 lines
41 KiB
PHP
1431 lines
41 KiB
PHP
<?php
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/**
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* CakeResponse
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Network
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* @since CakePHP(tm) v 2.0
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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App::uses('File', 'Utility');
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/**
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* CakeResponse is responsible for managing the response text, status and headers of a HTTP response.
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*
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* By default controllers will use this class to render their response. If you are going to use
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* a custom response class it should subclass this object in order to ensure compatibility.
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*
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* @package Cake.Network
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*/
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class CakeResponse {
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/**
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* Holds HTTP response statuses
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*
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* @var array
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*/
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protected $_statusCodes = array(
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100 => 'Continue',
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101 => 'Switching Protocols',
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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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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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307 => 'Temporary Redirect',
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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 Time-out',
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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 Large',
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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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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 Time-out',
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505 => 'Unsupported Version'
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);
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/**
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* Holds known mime type mappings
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*
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* @var array
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*/
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protected $_mimeTypes = array(
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'html' => array('text/html', '*/*'),
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'json' => 'application/json',
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'xml' => array('application/xml', 'text/xml'),
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'rss' => 'application/rss+xml',
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'ai' => 'application/postscript',
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'bcpio' => 'application/x-bcpio',
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'bin' => 'application/octet-stream',
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'ccad' => 'application/clariscad',
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'cdf' => 'application/x-netcdf',
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'class' => 'application/octet-stream',
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'cpio' => 'application/x-cpio',
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'cpt' => 'application/mac-compactpro',
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'csh' => 'application/x-csh',
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'csv' => array('text/csv', 'application/vnd.ms-excel', 'text/plain'),
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'dcr' => 'application/x-director',
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'dir' => 'application/x-director',
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'dms' => 'application/octet-stream',
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'doc' => 'application/msword',
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'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'drw' => 'application/drafting',
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'dvi' => 'application/x-dvi',
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'dwg' => 'application/acad',
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'dxf' => 'application/dxf',
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'dxr' => 'application/x-director',
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'eot' => 'application/vnd.ms-fontobject',
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'eps' => 'application/postscript',
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'exe' => 'application/octet-stream',
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'ez' => 'application/andrew-inset',
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'flv' => 'video/x-flv',
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'gtar' => 'application/x-gtar',
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'gz' => 'application/x-gzip',
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'bz2' => 'application/x-bzip',
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'7z' => 'application/x-7z-compressed',
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'hdf' => 'application/x-hdf',
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'hqx' => 'application/mac-binhex40',
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'ico' => 'image/x-icon',
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'ips' => 'application/x-ipscript',
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'ipx' => 'application/x-ipix',
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'js' => 'application/javascript',
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'latex' => 'application/x-latex',
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'lha' => 'application/octet-stream',
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'lsp' => 'application/x-lisp',
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'lzh' => 'application/octet-stream',
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'man' => 'application/x-troff-man',
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'me' => 'application/x-troff-me',
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'mif' => 'application/vnd.mif',
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'ms' => 'application/x-troff-ms',
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'nc' => 'application/x-netcdf',
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'oda' => 'application/oda',
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'otf' => 'font/otf',
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'pdf' => 'application/pdf',
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'pgn' => 'application/x-chess-pgn',
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'pot' => 'application/vnd.ms-powerpoint',
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'pps' => 'application/vnd.ms-powerpoint',
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'ppt' => 'application/vnd.ms-powerpoint',
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'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
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'ppz' => 'application/vnd.ms-powerpoint',
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'pre' => 'application/x-freelance',
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'prt' => 'application/pro_eng',
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'ps' => 'application/postscript',
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'roff' => 'application/x-troff',
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'scm' => 'application/x-lotusscreencam',
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'set' => 'application/set',
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'sh' => 'application/x-sh',
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'shar' => 'application/x-shar',
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'sit' => 'application/x-stuffit',
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'skd' => 'application/x-koan',
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'skm' => 'application/x-koan',
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'skp' => 'application/x-koan',
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'skt' => 'application/x-koan',
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'smi' => 'application/smil',
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'smil' => 'application/smil',
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'sol' => 'application/solids',
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'spl' => 'application/x-futuresplash',
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'src' => 'application/x-wais-source',
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'step' => 'application/STEP',
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'stl' => 'application/SLA',
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'stp' => 'application/STEP',
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'sv4cpio' => 'application/x-sv4cpio',
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'sv4crc' => 'application/x-sv4crc',
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'svg' => 'image/svg+xml',
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'svgz' => 'image/svg+xml',
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'swf' => 'application/x-shockwave-flash',
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't' => 'application/x-troff',
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'tar' => 'application/x-tar',
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'tcl' => 'application/x-tcl',
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'tex' => 'application/x-tex',
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'texi' => 'application/x-texinfo',
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'texinfo' => 'application/x-texinfo',
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'tr' => 'application/x-troff',
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'tsp' => 'application/dsptype',
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'ttc' => 'font/ttf',
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'ttf' => 'font/ttf',
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'unv' => 'application/i-deas',
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'ustar' => 'application/x-ustar',
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'vcd' => 'application/x-cdlink',
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'vda' => 'application/vda',
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'xlc' => 'application/vnd.ms-excel',
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'xll' => 'application/vnd.ms-excel',
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'xlm' => 'application/vnd.ms-excel',
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'xls' => 'application/vnd.ms-excel',
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'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
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'xlw' => 'application/vnd.ms-excel',
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'zip' => 'application/zip',
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'aif' => 'audio/x-aiff',
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'aifc' => 'audio/x-aiff',
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'aiff' => 'audio/x-aiff',
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'au' => 'audio/basic',
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'kar' => 'audio/midi',
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'mid' => 'audio/midi',
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'midi' => 'audio/midi',
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'mp2' => 'audio/mpeg',
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'mp3' => 'audio/mpeg',
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'mpga' => 'audio/mpeg',
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'ogg' => 'audio/ogg',
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'oga' => 'audio/ogg',
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'spx' => 'audio/ogg',
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'ra' => 'audio/x-realaudio',
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'ram' => 'audio/x-pn-realaudio',
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'rm' => 'audio/x-pn-realaudio',
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'rpm' => 'audio/x-pn-realaudio-plugin',
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'snd' => 'audio/basic',
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'tsi' => 'audio/TSP-audio',
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'wav' => 'audio/x-wav',
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'aac' => 'audio/aac',
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'asc' => 'text/plain',
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'c' => 'text/plain',
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'cc' => 'text/plain',
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'css' => 'text/css',
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'etx' => 'text/x-setext',
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'f' => 'text/plain',
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'f90' => 'text/plain',
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'h' => 'text/plain',
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'hh' => 'text/plain',
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'htm' => array('text/html', '*/*'),
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'ics' => 'text/calendar',
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'm' => 'text/plain',
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'rtf' => 'text/rtf',
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'rtx' => 'text/richtext',
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'sgm' => 'text/sgml',
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'sgml' => 'text/sgml',
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'tsv' => 'text/tab-separated-values',
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'tpl' => 'text/template',
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'txt' => 'text/plain',
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'text' => 'text/plain',
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'avi' => 'video/x-msvideo',
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'fli' => 'video/x-fli',
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'mov' => 'video/quicktime',
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'movie' => 'video/x-sgi-movie',
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'mpe' => 'video/mpeg',
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'mpeg' => 'video/mpeg',
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'mpg' => 'video/mpeg',
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'qt' => 'video/quicktime',
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'viv' => 'video/vnd.vivo',
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'vivo' => 'video/vnd.vivo',
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'ogv' => 'video/ogg',
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'webm' => 'video/webm',
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'mp4' => 'video/mp4',
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'm4v' => 'video/mp4',
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'f4v' => 'video/mp4',
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'f4p' => 'video/mp4',
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'm4a' => 'audio/mp4',
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'f4a' => 'audio/mp4',
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'f4b' => 'audio/mp4',
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'gif' => 'image/gif',
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'ief' => 'image/ief',
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'jpg' => 'image/jpeg',
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'jpeg' => 'image/jpeg',
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'jpe' => 'image/jpeg',
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'pbm' => 'image/x-portable-bitmap',
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'pgm' => 'image/x-portable-graymap',
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'png' => 'image/png',
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'pnm' => 'image/x-portable-anymap',
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'ppm' => 'image/x-portable-pixmap',
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'ras' => 'image/cmu-raster',
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'rgb' => 'image/x-rgb',
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'tif' => 'image/tiff',
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'tiff' => 'image/tiff',
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'xbm' => 'image/x-xbitmap',
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'xpm' => 'image/x-xpixmap',
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'xwd' => 'image/x-xwindowdump',
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'ice' => 'x-conference/x-cooltalk',
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'iges' => 'model/iges',
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'igs' => 'model/iges',
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'mesh' => 'model/mesh',
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'msh' => 'model/mesh',
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'silo' => 'model/mesh',
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'vrml' => 'model/vrml',
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'wrl' => 'model/vrml',
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'mime' => 'www/mime',
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'pdb' => 'chemical/x-pdb',
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'xyz' => 'chemical/x-pdb',
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'javascript' => 'application/javascript',
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'form' => 'application/x-www-form-urlencoded',
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'file' => 'multipart/form-data',
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'xhtml' => array('application/xhtml+xml', 'application/xhtml', 'text/xhtml'),
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'xhtml-mobile' => 'application/vnd.wap.xhtml+xml',
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'atom' => 'application/atom+xml',
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'amf' => 'application/x-amf',
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'wap' => array('text/vnd.wap.wml', 'text/vnd.wap.wmlscript', 'image/vnd.wap.wbmp'),
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'wml' => 'text/vnd.wap.wml',
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'wmlscript' => 'text/vnd.wap.wmlscript',
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'wbmp' => 'image/vnd.wap.wbmp',
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'woff' => 'application/x-font-woff',
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'webp' => 'image/webp',
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'appcache' => 'text/cache-manifest',
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'manifest' => 'text/cache-manifest',
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'htc' => 'text/x-component',
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'rdf' => 'application/xml',
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'crx' => 'application/x-chrome-extension',
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'oex' => 'application/x-opera-extension',
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'xpi' => 'application/x-xpinstall',
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'safariextz' => 'application/octet-stream',
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'webapp' => 'application/x-web-app-manifest+json',
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'vcf' => 'text/x-vcard',
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'vtt' => 'text/vtt',
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'mkv' => 'video/x-matroska',
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);
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/**
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* Protocol header to send to the client
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*
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* @var string
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*/
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protected $_protocol = 'HTTP/1.1';
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/**
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* Status code to send to the client
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*
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* @var integer
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*/
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protected $_status = 200;
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/**
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* Content type to send. This can be an 'extension' that will be transformed using the $_mimetypes array
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* or a complete mime-type
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*
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* @var integer
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*/
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protected $_contentType = 'text/html';
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/**
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* Buffer list of headers
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*
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* @var array
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*/
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protected $_headers = array();
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/**
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* Buffer string for response message
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*
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* @var string
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*/
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protected $_body = null;
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/**
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* File object for file to be read out as response
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*
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* @var File
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*/
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protected $_file = null;
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/**
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* File range. Used for requesting ranges of files.
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*
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* @var array
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*/
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protected $_fileRange = null;
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/**
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* The charset the response body is encoded with
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*
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* @var string
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*/
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protected $_charset = 'UTF-8';
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/**
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* Holds all the cache directives that will be converted
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* into headers when sending the request
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*
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* @var string
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*/
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protected $_cacheDirectives = array();
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/**
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* Holds cookies to be sent to the client
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*
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* @var array
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*/
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protected $_cookies = array();
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/**
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* Constructor
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*
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* @param array $options list of parameters to setup the response. Possible values are:
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* - body: the response text that should be sent to the client
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* - status: the HTTP status code to respond with
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* - type: a complete mime-type string or an extension mapped in this class
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* - charset: the charset for the response body
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*/
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public function __construct(array $options = array()) {
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if (isset($options['body'])) {
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$this->body($options['body']);
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}
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if (isset($options['status'])) {
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$this->statusCode($options['status']);
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}
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if (isset($options['type'])) {
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$this->type($options['type']);
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}
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if (!isset($options['charset'])) {
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$options['charset'] = Configure::read('App.encoding');
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}
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$this->charset($options['charset']);
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}
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/**
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* Sends the complete response to the client including headers and message body.
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* Will echo out the content in the response body.
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*
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* @return void
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*/
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public function send() {
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if (isset($this->_headers['Location']) && $this->_status === 200) {
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$this->statusCode(302);
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}
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$codeMessage = $this->_statusCodes[$this->_status];
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$this->_setCookies();
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$this->_sendHeader("{$this->_protocol} {$this->_status} {$codeMessage}");
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$this->_setContent();
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$this->_setContentLength();
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$this->_setContentType();
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foreach ($this->_headers as $header => $values) {
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foreach ((array)$values as $value) {
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$this->_sendHeader($header, $value);
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}
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}
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if ($this->_file) {
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$this->_sendFile($this->_file, $this->_fileRange);
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$this->_file = $this->_fileRange = null;
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} else {
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$this->_sendContent($this->_body);
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}
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}
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/**
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* Sets the cookies that have been added via CakeResponse::cookie() before any
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* other output is sent to the client. Will set the cookies in the order they
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* have been set.
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*
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* @return void
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*/
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protected function _setCookies() {
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foreach ($this->_cookies as $name => $c) {
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setcookie(
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$name, $c['value'], $c['expire'], $c['path'],
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$c['domain'], $c['secure'], $c['httpOnly']
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);
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}
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}
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/**
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* Formats the Content-Type header based on the configured contentType and charset
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* the charset will only be set in the header if the response is of type text/*
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*
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* @return void
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*/
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protected function _setContentType() {
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if (in_array($this->_status, array(304, 204))) {
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return;
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}
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$whitelist = array(
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'application/javascript', 'application/json', 'application/xml', 'application/rss+xml'
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);
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$charset = false;
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if (
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$this->_charset &&
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(strpos($this->_contentType, 'text/') === 0 || in_array($this->_contentType, $whitelist))
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) {
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$charset = true;
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}
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if ($charset) {
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$this->header('Content-Type', "{$this->_contentType}; charset={$this->_charset}");
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} else {
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$this->header('Content-Type', "{$this->_contentType}");
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}
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}
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/**
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* Sets the response body to an empty text if the status code is 204 or 304
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*
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* @return void
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*/
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protected function _setContent() {
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if (in_array($this->_status, array(304, 204))) {
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$this->body('');
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}
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}
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/**
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* Calculates the correct Content-Length and sets it as a header in the response
|
|
* Will not set the value if already set or if the output is compressed.
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _setContentLength() {
|
|
$shouldSetLength = !isset($this->_headers['Content-Length']) && !in_array($this->_status, range(301, 307));
|
|
if (isset($this->_headers['Content-Length']) && $this->_headers['Content-Length'] === false) {
|
|
unset($this->_headers['Content-Length']);
|
|
return;
|
|
}
|
|
if ($shouldSetLength && !$this->outputCompressed()) {
|
|
$offset = ob_get_level() ? ob_get_length() : 0;
|
|
if (ini_get('mbstring.func_overload') & 2 && function_exists('mb_strlen')) {
|
|
$this->length($offset + mb_strlen($this->_body, '8bit'));
|
|
} else {
|
|
$this->length($this->_headers['Content-Length'] = $offset + strlen($this->_body));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sends a header to the client.
|
|
*
|
|
* @param string $name the header name
|
|
* @param string $value the header value
|
|
* @return void
|
|
*/
|
|
protected function _sendHeader($name, $value = null) {
|
|
if (!headers_sent()) {
|
|
if ($value === null) {
|
|
header($name);
|
|
} else {
|
|
header("{$name}: {$value}");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sends a content string to the client.
|
|
*
|
|
* @param string $content string to send as response body
|
|
* @return void
|
|
*/
|
|
protected function _sendContent($content) {
|
|
echo $content;
|
|
}
|
|
|
|
/**
|
|
* Buffers a header string to be sent
|
|
* Returns the complete list of buffered headers
|
|
*
|
|
* ### Single header
|
|
* e.g `header('Location', 'http://example.com');`
|
|
*
|
|
* ### Multiple headers
|
|
* e.g `header(array('Location' => 'http://example.com', 'X-Extra' => 'My header'));`
|
|
*
|
|
* ### String header
|
|
* e.g `header('WWW-Authenticate: Negotiate');`
|
|
*
|
|
* ### Array of string headers
|
|
* e.g `header(array('WWW-Authenticate: Negotiate', 'Content-type: application/pdf'));`
|
|
*
|
|
* Multiple calls for setting the same header name will have the same effect as setting the header once
|
|
* with the last value sent for it
|
|
* e.g `header('WWW-Authenticate: Negotiate'); header('WWW-Authenticate: Not-Negotiate');`
|
|
* will have the same effect as only doing `header('WWW-Authenticate: Not-Negotiate');`
|
|
*
|
|
* @param string|array $header. An array of header strings or a single header string
|
|
* - an associative array of "header name" => "header value" is also accepted
|
|
* - an array of string headers is also accepted
|
|
* @param string|array $value. The header value(s)
|
|
* @return array list of headers to be sent
|
|
*/
|
|
public function header($header = null, $value = null) {
|
|
if ($header === null) {
|
|
return $this->_headers;
|
|
}
|
|
$headers = is_array($header) ? $header : array($header => $value);
|
|
foreach ($headers as $header => $value) {
|
|
if (is_numeric($header)) {
|
|
list($header, $value) = array($value, null);
|
|
}
|
|
if ($value === null) {
|
|
list($header, $value) = explode(':', $header, 2);
|
|
}
|
|
$this->_headers[$header] = is_array($value) ? array_map('trim', $value) : trim($value);
|
|
}
|
|
return $this->_headers;
|
|
}
|
|
|
|
/**
|
|
* Acccessor for the location header.
|
|
*
|
|
* Get/Set the Location header value.
|
|
* @param null|string $url Either null to get the current location, or a string to set one.
|
|
* @return string|null When setting the location null will be returned. When reading the location
|
|
* a string of the current location header value (if any) will be returned.
|
|
*/
|
|
public function location($url = null) {
|
|
if ($url === null) {
|
|
$headers = $this->header();
|
|
return isset($headers['Location']) ? $headers['Location'] : null;
|
|
}
|
|
$this->header('Location', $url);
|
|
}
|
|
|
|
/**
|
|
* Buffers the response message to be sent
|
|
* if $content is null the current buffer is returned
|
|
*
|
|
* @param string $content the string message to be sent
|
|
* @return string current message buffer if $content param is passed as null
|
|
*/
|
|
public function body($content = null) {
|
|
if ($content === null) {
|
|
return $this->_body;
|
|
}
|
|
return $this->_body = $content;
|
|
}
|
|
|
|
/**
|
|
* Sets the HTTP status code to be sent
|
|
* if $code is null the current code is returned
|
|
*
|
|
* @param integer $code the HTTP status code
|
|
* @return integer current status code
|
|
* @throws CakeException When an unknown status code is reached.
|
|
*/
|
|
public function statusCode($code = null) {
|
|
if ($code === null) {
|
|
return $this->_status;
|
|
}
|
|
if (!isset($this->_statusCodes[$code])) {
|
|
throw new CakeException(__d('cake_dev', 'Unknown status code'));
|
|
}
|
|
return $this->_status = $code;
|
|
}
|
|
|
|
/**
|
|
* Queries & sets valid HTTP response codes & messages.
|
|
*
|
|
* @param integer|array $code If $code is an integer, then the corresponding code/message is
|
|
* returned if it exists, null if it does not exist. If $code is an array, then the
|
|
* keys are used as codes and the values as messages to add to the default HTTP
|
|
* codes. The codes must be integers greater than 99 and less than 1000. Keep in
|
|
* mind that the HTTP specification outlines that status codes begin with a digit
|
|
* between 1 and 5, which defines the class of response the client is to expect.
|
|
* Example:
|
|
*
|
|
* httpCodes(404); // returns array(404 => 'Not Found')
|
|
*
|
|
* httpCodes(array(
|
|
* 381 => 'Unicorn Moved',
|
|
* 555 => 'Unexpected Minotaur'
|
|
* )); // sets these new values, and returns true
|
|
*
|
|
* httpCodes(array(
|
|
* 0 => 'Nothing Here',
|
|
* -1 => 'Reverse Infinity',
|
|
* 12345 => 'Universal Password',
|
|
* 'Hello' => 'World'
|
|
* )); // throws an exception due to invalid codes
|
|
*
|
|
* For more on HTTP status codes see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6.1
|
|
*
|
|
* @return mixed associative array of the HTTP codes as keys, and the message
|
|
* strings as values, or null of the given $code does not exist.
|
|
* @throws CakeException If an attempt is made to add an invalid status code
|
|
*/
|
|
public function httpCodes($code = null) {
|
|
if (empty($code)) {
|
|
return $this->_statusCodes;
|
|
}
|
|
if (is_array($code)) {
|
|
$codes = array_keys($code);
|
|
$min = min($codes);
|
|
if (!is_int($min) || $min < 100 || max($codes) > 999) {
|
|
throw new CakeException(__d('cake_dev', 'Invalid status code'));
|
|
}
|
|
$this->_statusCodes = $code + $this->_statusCodes;
|
|
return true;
|
|
}
|
|
if (!isset($this->_statusCodes[$code])) {
|
|
return null;
|
|
}
|
|
return array($code => $this->_statusCodes[$code]);
|
|
}
|
|
|
|
/**
|
|
* Sets the response content type. It can be either a file extension
|
|
* which will be mapped internally to a mime-type or a string representing a mime-type
|
|
* if $contentType is null the current content type is returned
|
|
* if $contentType is an associative array, content type definitions will be stored/replaced
|
|
*
|
|
* ### Setting the content type
|
|
*
|
|
* e.g `type('jpg');`
|
|
*
|
|
* ### Returning the current content type
|
|
*
|
|
* e.g `type();`
|
|
*
|
|
* ### Storing content type definitions
|
|
*
|
|
* e.g `type(array('keynote' => 'application/keynote', 'bat' => 'application/bat'));`
|
|
*
|
|
* ### Replacing a content type definition
|
|
*
|
|
* e.g `type(array('jpg' => 'text/plain'));`
|
|
*
|
|
* @param string $contentType
|
|
* @return mixed current content type or false if supplied an invalid content type
|
|
*/
|
|
public function type($contentType = null) {
|
|
if ($contentType === null) {
|
|
return $this->_contentType;
|
|
}
|
|
if (is_array($contentType)) {
|
|
foreach ($contentType as $type => $definition) {
|
|
$this->_mimeTypes[$type] = $definition;
|
|
}
|
|
return $this->_contentType;
|
|
}
|
|
if (isset($this->_mimeTypes[$contentType])) {
|
|
$contentType = $this->_mimeTypes[$contentType];
|
|
$contentType = is_array($contentType) ? current($contentType) : $contentType;
|
|
}
|
|
if (strpos($contentType, '/') === false) {
|
|
return false;
|
|
}
|
|
return $this->_contentType = $contentType;
|
|
}
|
|
|
|
/**
|
|
* Returns the mime type definition for an alias
|
|
*
|
|
* e.g `getMimeType('pdf'); // returns 'application/pdf'`
|
|
*
|
|
* @param string $alias the content type alias to map
|
|
* @return mixed string mapped mime type or false if $alias is not mapped
|
|
*/
|
|
public function getMimeType($alias) {
|
|
if (isset($this->_mimeTypes[$alias])) {
|
|
return $this->_mimeTypes[$alias];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Maps a content-type back to an alias
|
|
*
|
|
* e.g `mapType('application/pdf'); // returns 'pdf'`
|
|
*
|
|
* @param string|array $ctype Either a string content type to map, or an array of types.
|
|
* @return mixed Aliases for the types provided.
|
|
*/
|
|
public function mapType($ctype) {
|
|
if (is_array($ctype)) {
|
|
return array_map(array($this, 'mapType'), $ctype);
|
|
}
|
|
|
|
foreach ($this->_mimeTypes as $alias => $types) {
|
|
if (in_array($ctype, (array)$types)) {
|
|
return $alias;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the response charset
|
|
* if $charset is null the current charset is returned
|
|
*
|
|
* @param string $charset
|
|
* @return string current charset
|
|
*/
|
|
public function charset($charset = null) {
|
|
if ($charset === null) {
|
|
return $this->_charset;
|
|
}
|
|
return $this->_charset = $charset;
|
|
}
|
|
|
|
/**
|
|
* Sets the correct headers to instruct the client to not cache the response
|
|
*
|
|
* @return void
|
|
*/
|
|
public function disableCache() {
|
|
$this->header(array(
|
|
'Expires' => 'Mon, 26 Jul 1997 05:00:00 GMT',
|
|
'Last-Modified' => gmdate("D, d M Y H:i:s") . " GMT",
|
|
'Cache-Control' => 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0'
|
|
));
|
|
}
|
|
|
|
/**
|
|
* Sets the correct headers to instruct the client to cache the response.
|
|
*
|
|
* @param string $since a valid time since the response text has not been modified
|
|
* @param string $time a valid time for cache expiry
|
|
* @return void
|
|
*/
|
|
public function cache($since, $time = '+1 day') {
|
|
if (!is_int($time)) {
|
|
$time = strtotime($time);
|
|
}
|
|
$this->header(array(
|
|
'Date' => gmdate("D, j M Y G:i:s ", time()) . 'GMT'
|
|
));
|
|
$this->modified($since);
|
|
$this->expires($time);
|
|
$this->sharable(true);
|
|
$this->maxAge($time - time());
|
|
}
|
|
|
|
/**
|
|
* Sets whether a response is eligible to be cached by intermediate proxies
|
|
* This method controls the `public` or `private` directive in the Cache-Control
|
|
* header
|
|
*
|
|
* @param boolean $public If set to true, the Cache-Control header will be set as public
|
|
* if set to false, the response will be set to private
|
|
* if no value is provided, it will return whether the response is sharable or not
|
|
* @param integer $time time in seconds after which the response should no longer be considered fresh
|
|
* @return boolean
|
|
*/
|
|
public function sharable($public = null, $time = null) {
|
|
if ($public === null) {
|
|
$public = array_key_exists('public', $this->_cacheDirectives);
|
|
$private = array_key_exists('private', $this->_cacheDirectives);
|
|
$noCache = array_key_exists('no-cache', $this->_cacheDirectives);
|
|
if (!$public && !$private && !$noCache) {
|
|
return null;
|
|
}
|
|
$sharable = $public || ! ($private || $noCache);
|
|
return $sharable;
|
|
}
|
|
if ($public) {
|
|
$this->_cacheDirectives['public'] = true;
|
|
unset($this->_cacheDirectives['private']);
|
|
$this->sharedMaxAge($time);
|
|
} else {
|
|
$this->_cacheDirectives['private'] = true;
|
|
unset($this->_cacheDirectives['public']);
|
|
$this->maxAge($time);
|
|
}
|
|
if (!$time) {
|
|
$this->_setCacheControl();
|
|
}
|
|
return (bool)$public;
|
|
}
|
|
|
|
/**
|
|
* Sets the Cache-Control s-maxage directive.
|
|
* The max-age is the number of seconds after which the response should no longer be considered
|
|
* a good candidate to be fetched from a shared cache (like in a proxy server).
|
|
* If called with no parameters, this function will return the current max-age value if any
|
|
*
|
|
* @param integer $seconds if null, the method will return the current s-maxage value
|
|
* @return integer
|
|
*/
|
|
public function sharedMaxAge($seconds = null) {
|
|
if ($seconds !== null) {
|
|
$this->_cacheDirectives['s-maxage'] = $seconds;
|
|
$this->_setCacheControl();
|
|
}
|
|
if (isset($this->_cacheDirectives['s-maxage'])) {
|
|
return $this->_cacheDirectives['s-maxage'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the Cache-Control max-age directive.
|
|
* The max-age is the number of seconds after which the response should no longer be considered
|
|
* a good candidate to be fetched from the local (client) cache.
|
|
* If called with no parameters, this function will return the current max-age value if any
|
|
*
|
|
* @param integer $seconds if null, the method will return the current max-age value
|
|
* @return integer
|
|
*/
|
|
public function maxAge($seconds = null) {
|
|
if ($seconds !== null) {
|
|
$this->_cacheDirectives['max-age'] = $seconds;
|
|
$this->_setCacheControl();
|
|
}
|
|
if (isset($this->_cacheDirectives['max-age'])) {
|
|
return $this->_cacheDirectives['max-age'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the Cache-Control must-revalidate directive.
|
|
* must-revalidate indicates that the response should not be served
|
|
* stale by a cache under any circumstance without first revalidating
|
|
* with the origin.
|
|
* If called with no parameters, this function will return whether must-revalidate is present.
|
|
*
|
|
* @param integer $seconds if null, the method will return the current
|
|
* must-revalidate value
|
|
* @return boolean
|
|
*/
|
|
public function mustRevalidate($enable = null) {
|
|
if ($enable !== null) {
|
|
if ($enable) {
|
|
$this->_cacheDirectives['must-revalidate'] = true;
|
|
} else {
|
|
unset($this->_cacheDirectives['must-revalidate']);
|
|
}
|
|
$this->_setCacheControl();
|
|
}
|
|
return array_key_exists('must-revalidate', $this->_cacheDirectives);
|
|
}
|
|
|
|
/**
|
|
* Helper method to generate a valid Cache-Control header from the options set
|
|
* in other methods
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _setCacheControl() {
|
|
$control = '';
|
|
foreach ($this->_cacheDirectives as $key => $val) {
|
|
$control .= $val === true ? $key : sprintf('%s=%s', $key, $val);
|
|
$control .= ', ';
|
|
}
|
|
$control = rtrim($control, ', ');
|
|
$this->header('Cache-Control', $control);
|
|
}
|
|
|
|
/**
|
|
* Sets the Expires header for the response by taking an expiration time
|
|
* If called with no parameters it will return the current Expires value
|
|
*
|
|
* ## Examples:
|
|
*
|
|
* `$response->expires('now')` Will Expire the response cache now
|
|
* `$response->expires(new DateTime('+1 day'))` Will set the expiration in next 24 hours
|
|
* `$response->expires()` Will return the current expiration header value
|
|
*
|
|
* @param string|DateTime $time
|
|
* @return string
|
|
*/
|
|
public function expires($time = null) {
|
|
if ($time !== null) {
|
|
$date = $this->_getUTCDate($time);
|
|
$this->_headers['Expires'] = $date->format('D, j M Y H:i:s') . ' GMT';
|
|
}
|
|
if (isset($this->_headers['Expires'])) {
|
|
return $this->_headers['Expires'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the Last-Modified header for the response by taking an modification time
|
|
* If called with no parameters it will return the current Last-Modified value
|
|
*
|
|
* ## Examples:
|
|
*
|
|
* `$response->modified('now')` Will set the Last-Modified to the current time
|
|
* `$response->modified(new DateTime('+1 day'))` Will set the modification date in the past 24 hours
|
|
* `$response->modified()` Will return the current Last-Modified header value
|
|
*
|
|
* @param string|DateTime $time
|
|
* @return string
|
|
*/
|
|
public function modified($time = null) {
|
|
if ($time !== null) {
|
|
$date = $this->_getUTCDate($time);
|
|
$this->_headers['Last-Modified'] = $date->format('D, j M Y H:i:s') . ' GMT';
|
|
}
|
|
if (isset($this->_headers['Last-Modified'])) {
|
|
return $this->_headers['Last-Modified'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the response as Not Modified by removing any body contents
|
|
* setting the status code to "304 Not Modified" and removing all
|
|
* conflicting headers
|
|
*
|
|
* @return void
|
|
*/
|
|
public function notModified() {
|
|
$this->statusCode(304);
|
|
$this->body('');
|
|
$remove = array(
|
|
'Allow',
|
|
'Content-Encoding',
|
|
'Content-Language',
|
|
'Content-Length',
|
|
'Content-MD5',
|
|
'Content-Type',
|
|
'Last-Modified'
|
|
);
|
|
foreach ($remove as $header) {
|
|
unset($this->_headers[$header]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the Vary header for the response, if an array is passed,
|
|
* values will be imploded into a comma separated string. If no
|
|
* parameters are passed, then an array with the current Vary header
|
|
* value is returned
|
|
*
|
|
* @param string|array $cacheVariances a single Vary string or a array
|
|
* containing the list for variances.
|
|
* @return array
|
|
*/
|
|
public function vary($cacheVariances = null) {
|
|
if ($cacheVariances !== null) {
|
|
$cacheVariances = (array)$cacheVariances;
|
|
$this->_headers['Vary'] = implode(', ', $cacheVariances);
|
|
}
|
|
if (isset($this->_headers['Vary'])) {
|
|
return explode(', ', $this->_headers['Vary']);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets the response Etag, Etags are a strong indicative that a response
|
|
* can be cached by a HTTP client. A bad way of generating Etags is
|
|
* creating a hash of the response output, instead generate a unique
|
|
* hash of the unique components that identifies a request, such as a
|
|
* modification time, a resource Id, and anything else you consider it
|
|
* makes it unique.
|
|
*
|
|
* Second parameter is used to instruct clients that the content has
|
|
* changed, but sematicallly, it can be used as the same thing. Think
|
|
* for instance of a page with a hit counter, two different page views
|
|
* are equivalent, but they differ by a few bytes. This leaves off to
|
|
* the Client the decision of using or not the cached page.
|
|
*
|
|
* If no parameters are passed, current Etag header is returned.
|
|
*
|
|
* @param string $hash the unique has that identifies this response
|
|
* @param boolean $weak whether the response is semantically the same as
|
|
* other with the same hash or not
|
|
* @return string
|
|
*/
|
|
public function etag($tag = null, $weak = false) {
|
|
if ($tag !== null) {
|
|
$this->_headers['Etag'] = sprintf('%s"%s"', ($weak) ? 'W/' : null, $tag);
|
|
}
|
|
if (isset($this->_headers['Etag'])) {
|
|
return $this->_headers['Etag'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns a DateTime object initialized at the $time param and using UTC
|
|
* as timezone
|
|
*
|
|
* @param string|integer|DateTime $time
|
|
* @return DateTime
|
|
*/
|
|
protected function _getUTCDate($time = null) {
|
|
if ($time instanceof DateTime) {
|
|
$result = clone $time;
|
|
} elseif (is_int($time)) {
|
|
$result = new DateTime(date('Y-m-d H:i:s', $time));
|
|
} else {
|
|
$result = new DateTime($time);
|
|
}
|
|
$result->setTimeZone(new DateTimeZone('UTC'));
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Sets the correct output buffering handler to send a compressed response. Responses will
|
|
* be compressed with zlib, if the extension is available.
|
|
*
|
|
* @return boolean false if client does not accept compressed responses or no handler is available, true otherwise
|
|
*/
|
|
public function compress() {
|
|
$compressionEnabled = ini_get("zlib.output_compression") !== '1' &&
|
|
extension_loaded("zlib") &&
|
|
(strpos(env('HTTP_ACCEPT_ENCODING'), 'gzip') !== false);
|
|
return $compressionEnabled && ob_start('ob_gzhandler');
|
|
}
|
|
|
|
/**
|
|
* Returns whether the resulting output will be compressed by PHP
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function outputCompressed() {
|
|
return strpos(env('HTTP_ACCEPT_ENCODING'), 'gzip') !== false
|
|
&& (ini_get("zlib.output_compression") === '1' || in_array('ob_gzhandler', ob_list_handlers()));
|
|
}
|
|
|
|
/**
|
|
* Sets the correct headers to instruct the browser to download the response as a file.
|
|
*
|
|
* @param string $filename the name of the file as the browser will download the response
|
|
* @return void
|
|
*/
|
|
public function download($filename) {
|
|
$this->header('Content-Disposition', 'attachment; filename="' . $filename . '"');
|
|
}
|
|
|
|
/**
|
|
* Sets the protocol to be used when sending the response. Defaults to HTTP/1.1
|
|
* If called with no arguments, it will return the current configured protocol
|
|
*
|
|
* @param string protocol to be used for sending response
|
|
* @return string protocol currently set
|
|
*/
|
|
public function protocol($protocol = null) {
|
|
if ($protocol !== null) {
|
|
$this->_protocol = $protocol;
|
|
}
|
|
return $this->_protocol;
|
|
}
|
|
|
|
/**
|
|
* Sets the Content-Length header for the response
|
|
* If called with no arguments returns the last Content-Length set
|
|
*
|
|
* @param integer $bytes Number of bytes
|
|
* @return integer|null
|
|
*/
|
|
public function length($bytes = null) {
|
|
if ($bytes !== null) {
|
|
$this->_headers['Content-Length'] = $bytes;
|
|
}
|
|
if (isset($this->_headers['Content-Length'])) {
|
|
return $this->_headers['Content-Length'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a response has not been modified according to the 'If-None-Match'
|
|
* (Etags) and 'If-Modified-Since' (last modification date) request
|
|
* headers headers. If the response is detected to be not modified, it
|
|
* is marked as so accordingly so the client can be informed of that.
|
|
*
|
|
* In order to mark a response as not modified, you need to set at least
|
|
* the Last-Modified etag response header before calling this method. Otherwise
|
|
* a comparison will not be possible.
|
|
*
|
|
* @param CakeRequest $request Request object
|
|
* @return boolean whether the response was marked as not modified or not.
|
|
*/
|
|
public function checkNotModified(CakeRequest $request) {
|
|
$etags = preg_split('/\s*,\s*/', $request->header('If-None-Match'), null, PREG_SPLIT_NO_EMPTY);
|
|
$modifiedSince = $request->header('If-Modified-Since');
|
|
if ($responseTag = $this->etag()) {
|
|
$etagMatches = in_array('*', $etags) || in_array($responseTag, $etags);
|
|
}
|
|
if ($modifiedSince) {
|
|
$timeMatches = strtotime($this->modified()) == strtotime($modifiedSince);
|
|
}
|
|
$checks = compact('etagMatches', 'timeMatches');
|
|
if (empty($checks)) {
|
|
return false;
|
|
}
|
|
$notModified = !in_array(false, $checks, true);
|
|
if ($notModified) {
|
|
$this->notModified();
|
|
}
|
|
return $notModified;
|
|
}
|
|
|
|
/**
|
|
* String conversion. Fetches the response body as a string.
|
|
* Does *not* send headers.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function __toString() {
|
|
return (string)$this->_body;
|
|
}
|
|
|
|
/**
|
|
* Getter/Setter for cookie configs
|
|
*
|
|
* This method acts as a setter/getter depending on the type of the argument.
|
|
* If the method is called with no arguments, it returns all configurations.
|
|
*
|
|
* If the method is called with a string as argument, it returns either the
|
|
* given configuration if it is set, or null, if it's not set.
|
|
*
|
|
* If the method is called with an array as argument, it will set the cookie
|
|
* configuration to the cookie container.
|
|
*
|
|
* @param array $options Either null to get all cookies, string for a specific cookie
|
|
* or array to set cookie.
|
|
*
|
|
* ### Options (when setting a configuration)
|
|
* - name: The Cookie name
|
|
* - value: Value of the cookie
|
|
* - expire: Time the cookie expires in
|
|
* - path: Path the cookie applies to
|
|
* - domain: Domain the cookie is for.
|
|
* - secure: Is the cookie https?
|
|
* - httpOnly: Is the cookie available in the client?
|
|
*
|
|
* ## Examples
|
|
*
|
|
* ### Getting all cookies
|
|
*
|
|
* `$this->cookie()`
|
|
*
|
|
* ### Getting a certain cookie configuration
|
|
*
|
|
* `$this->cookie('MyCookie')`
|
|
*
|
|
* ### Setting a cookie configuration
|
|
*
|
|
* `$this->cookie((array) $options)`
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function cookie($options = null) {
|
|
if ($options === null) {
|
|
return $this->_cookies;
|
|
}
|
|
|
|
if (is_string($options)) {
|
|
if (!isset($this->_cookies[$options])) {
|
|
return null;
|
|
}
|
|
return $this->_cookies[$options];
|
|
}
|
|
|
|
$defaults = array(
|
|
'name' => 'CakeCookie[default]',
|
|
'value' => '',
|
|
'expire' => 0,
|
|
'path' => '/',
|
|
'domain' => '',
|
|
'secure' => false,
|
|
'httpOnly' => false
|
|
);
|
|
$options += $defaults;
|
|
|
|
$this->_cookies[$options['name']] = $options;
|
|
}
|
|
|
|
/**
|
|
* Setup for display or download the given file.
|
|
*
|
|
* If $_SERVER['HTTP_RANGE'] is set a slice of the file will be
|
|
* returned instead of the entire file.
|
|
*
|
|
* ### Options keys
|
|
*
|
|
* - name: Alternate download name
|
|
* - download: If `true` sets download header and forces file to be downloaded rather than displayed in browser
|
|
*
|
|
* @param string $path Path to file
|
|
* @param array $options Options See above.
|
|
* @return void
|
|
* @throws NotFoundException
|
|
*/
|
|
public function file($path, $options = array()) {
|
|
$options += array(
|
|
'name' => null,
|
|
'download' => null
|
|
);
|
|
|
|
if (!is_file($path)) {
|
|
$path = APP . $path;
|
|
}
|
|
|
|
$file = new File($path);
|
|
if (!$file->exists() || !$file->readable()) {
|
|
if (Configure::read('debug')) {
|
|
throw new NotFoundException(__d('cake_dev', 'The requested file %s was not found or not readable', $path));
|
|
}
|
|
throw new NotFoundException(__d('cake', 'The requested file was not found'));
|
|
}
|
|
|
|
$extension = strtolower($file->ext());
|
|
$download = $options['download'];
|
|
if ((!$extension || $this->type($extension) === false) && $download === null) {
|
|
$download = true;
|
|
}
|
|
|
|
$fileSize = $file->size();
|
|
if ($download) {
|
|
$agent = env('HTTP_USER_AGENT');
|
|
|
|
if (preg_match('%Opera(/| )([0-9].[0-9]{1,2})%', $agent)) {
|
|
$contentType = 'application/octet-stream';
|
|
} elseif (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $agent)) {
|
|
$contentType = 'application/force-download';
|
|
}
|
|
|
|
if (!empty($contentType)) {
|
|
$this->type($contentType);
|
|
}
|
|
if ($options['name'] === null) {
|
|
$name = $file->name;
|
|
} else {
|
|
$name = $options['name'];
|
|
}
|
|
$this->download($name);
|
|
$this->header('Accept-Ranges', 'bytes');
|
|
$this->header('Content-Transfer-Encoding', 'binary');
|
|
|
|
$httpRange = env('HTTP_RANGE');
|
|
if (isset($httpRange)) {
|
|
$this->_fileRange($file, $httpRange);
|
|
} else {
|
|
$this->header('Content-Length', $fileSize);
|
|
}
|
|
} else {
|
|
$this->header('Content-Length', $fileSize);
|
|
}
|
|
$this->_clearBuffer();
|
|
$this->_file = $file;
|
|
}
|
|
|
|
/**
|
|
* Apply a file range to a file and set the end offset.
|
|
*
|
|
* If an invalid range is requested a 416 Status code will be used
|
|
* in the response.
|
|
*
|
|
* @param File $file The file to set a range on.
|
|
* @param string $httpRange The range to use.
|
|
* @return void
|
|
*/
|
|
protected function _fileRange($file, $httpRange) {
|
|
list(, $range) = explode('=', $httpRange);
|
|
list($start, $end) = explode('-', $range);
|
|
|
|
$fileSize = $file->size();
|
|
$lastByte = $fileSize - 1;
|
|
|
|
if ($start === '') {
|
|
$start = $fileSize - $end;
|
|
$end = $lastByte;
|
|
}
|
|
if ($end === '') {
|
|
$end = $lastByte;
|
|
}
|
|
|
|
if ($start > $end || $end > $lastByte || $start > $lastByte) {
|
|
$this->statusCode(416);
|
|
$this->header(array(
|
|
'Content-Range' => 'bytes 0-' . $lastByte . '/' . $fileSize
|
|
));
|
|
return;
|
|
}
|
|
|
|
$this->header(array(
|
|
'Content-Length' => $end - $start + 1,
|
|
'Content-Range' => 'bytes ' . $start . '-' . $end . '/' . $fileSize
|
|
));
|
|
|
|
$this->statusCode(206);
|
|
$this->_fileRange = array($start, $end);
|
|
}
|
|
|
|
/**
|
|
* Reads out a file, and echos the content to the client.
|
|
*
|
|
* @param File $file File object
|
|
* @param array $range The range to read out of the file.
|
|
* @return boolean True is whole file is echoed successfully or false if client connection is lost in between
|
|
*/
|
|
protected function _sendFile($file, $range) {
|
|
$compress = $this->outputCompressed();
|
|
$file->open('rb');
|
|
|
|
$end = $start = false;
|
|
if ($range) {
|
|
list($start, $end) = $range;
|
|
}
|
|
if ($start !== false) {
|
|
$file->offset($start);
|
|
}
|
|
|
|
$bufferSize = 8192;
|
|
set_time_limit(0);
|
|
session_write_close();
|
|
while (!feof($file->handle)) {
|
|
if (!$this->_isActive()) {
|
|
$file->close();
|
|
return false;
|
|
}
|
|
$offset = $file->offset();
|
|
if ($end && $offset >= $end) {
|
|
break;
|
|
}
|
|
if ($end && $offset + $bufferSize >= $end) {
|
|
$bufferSize = $end - $offset + 1;
|
|
}
|
|
echo fread($file->handle, $bufferSize);
|
|
if (!$compress) {
|
|
$this->_flushBuffer();
|
|
}
|
|
}
|
|
$file->close();
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns true if connection is still active
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function _isActive() {
|
|
return connection_status() === CONNECTION_NORMAL && !connection_aborted();
|
|
}
|
|
|
|
/**
|
|
* Clears the contents of the topmost output buffer and discards them
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function _clearBuffer() {
|
|
//@codingStandardsIgnoreStart
|
|
return @ob_end_clean();
|
|
//@codingStandardsIgnoreEnd
|
|
}
|
|
|
|
/**
|
|
* Flushes the contents of the output buffer
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _flushBuffer() {
|
|
//@codingStandardsIgnoreStart
|
|
@flush();
|
|
@ob_flush();
|
|
//@codingStandardsIgnoreEnd
|
|
}
|
|
|
|
}
|