/lib/Cake/Network/CakeResponse.php - アノテート - pictcode - Redmine

spyder1211

<?php

2

/**

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 * CakeResponse

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5

 * 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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 * 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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 * @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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21

/**

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 * CakeResponse is responsible for managing the response text, status and headers of a HTTP response.

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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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 * @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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 * @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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                429 => 'Too Many Requests',

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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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 * @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'),

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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',

179

                'unv' => 'application/i-deas',

180

                'ustar' => 'application/x-ustar',

181

                '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',

228

                'tpl' => 'text/template',

229

                'txt' => 'text/plain',

230

                'text' => 'text/plain',

231

                'avi' => 'video/x-msvideo',

232

                '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',

243

                'mp4' => 'video/mp4',

244

                'm4v' => 'video/mp4',

245

                'f4v' => 'video/mp4',

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                'f4p' => 'video/mp4',

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                'm4a' => 'audio/mp4',

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                'f4a' => 'audio/mp4',

249

                'f4b' => 'audio/mp4',

250

                'gif' => 'image/gif',

251

                'ief' => 'image/ief',

252

                'jpg' => 'image/jpeg',

253

                'jpeg' => 'image/jpeg',

254

                'jpe' => 'image/jpeg',

255

                'pbm' => 'image/x-portable-bitmap',

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                'pgm' => 'image/x-portable-graymap',

257

                'png' => 'image/png',

258

                'pnm' => 'image/x-portable-anymap',

259

                'ppm' => 'image/x-portable-pixmap',

260

                'ras' => 'image/cmu-raster',

261

                'rgb' => 'image/x-rgb',

262

                'tif' => 'image/tiff',

263

                'tiff' => 'image/tiff',

264

                'xbm' => 'image/x-xbitmap',

265

                'xpm' => 'image/x-xpixmap',

266

                'xwd' => 'image/x-xwindowdump',

267

                'ice' => 'x-conference/x-cooltalk',

268

                'iges' => 'model/iges',

269

                'igs' => 'model/iges',

270

                'mesh' => 'model/mesh',

271

                'msh' => 'model/mesh',

272

                'silo' => 'model/mesh',

273

                'vrml' => 'model/vrml',

274

                'wrl' => 'model/vrml',

275

                'mime' => 'www/mime',

276

                'pdb' => 'chemical/x-pdb',

277

                'xyz' => 'chemical/x-pdb',

278

                'javascript' => 'application/javascript',

279

                'form' => 'application/x-www-form-urlencoded',

280

                'file' => 'multipart/form-data',

281

                'xhtml' => array('application/xhtml+xml', 'application/xhtml', 'text/xhtml'),

282

                'xhtml-mobile' => 'application/vnd.wap.xhtml+xml',

283

                'atom' => 'application/atom+xml',

284

                'amf' => 'application/x-amf',

285

                'wap' => array('text/vnd.wap.wml', 'text/vnd.wap.wmlscript', 'image/vnd.wap.wbmp'),

286

                'wml' => 'text/vnd.wap.wml',

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                'wmlscript' => 'text/vnd.wap.wmlscript',

288

                'wbmp' => 'image/vnd.wap.wbmp',

289

                'woff' => 'application/x-font-woff',

290

                'webp' => 'image/webp',

291

                'appcache' => 'text/cache-manifest',

292

                'manifest' => 'text/cache-manifest',

293

                'htc' => 'text/x-component',

294

                'rdf' => 'application/xml',

295

                'crx' => 'application/x-chrome-extension',

296

                'oex' => 'application/x-opera-extension',

297

                'xpi' => 'application/x-xpinstall',

298

                'safariextz' => 'application/octet-stream',

299

                'webapp' => 'application/x-web-app-manifest+json',

300

                'vcf' => 'text/x-vcard',

301

                'vtt' => 'text/vtt',

302

                'mkv' => 'video/x-matroska',

303

                'pkpass' => 'application/vnd.apple.pkpass'

304

);

305

306

/**

307

 * Protocol header to send to the client

308

309

 * @var string

310

*/

311

        protected $_protocol = 'HTTP/1.1';

312

313

/**

314

 * Status code to send to the client

315

316

 * @var int

317

*/

318

        protected $_status = 200;

319

320

/**

321

 * Content type to send. This can be an 'extension' that will be transformed using the $_mimetypes array

322

 * or a complete mime-type

323

324

 * @var int

325

*/

326

        protected $_contentType = 'text/html';

327

328

/**

329

 * Buffer list of headers

330

331

 * @var array

332

*/

333

        protected $_headers = array();

334

335

/**

336

 * Buffer string for response message

337

338

 * @var string

339

*/

340

        protected $_body = null;

341

342

/**

343

 * File object for file to be read out as response

344

345

 * @var File

346

*/

347

        protected $_file = null;

348

349

/**

350

 * File range. Used for requesting ranges of files.

351

352

 * @var array

353

*/

354

        protected $_fileRange = null;

355

356

/**

357

 * The charset the response body is encoded with

358

359

 * @var string

360

*/

361

        protected $_charset = 'UTF-8';

362

363

/**

364

 * Holds all the cache directives that will be converted

365

 * into headers when sending the request

366

367

 * @var string

368

*/

369

        protected $_cacheDirectives = array();

370

371

/**

372

 * Holds cookies to be sent to the client

373

374

 * @var array

375

*/

376

        protected $_cookies = array();

377

378

/**

379

 * Constructor

380

381

 * @param array $options list of parameters to setup the response. Possible values are:

382

 *        - body: the response text that should be sent to the client

383

 *        - statusCodes: additional allowable response codes

384

 *        - status: the HTTP status code to respond with

385

 *        - type: a complete mime-type string or an extension mapped in this class

386

 *        - charset: the charset for the response body

387

*/

388

        public function __construct(array $options = array()) {

389

                if (isset($options['body'])) {

390

                        $this->body($options['body']);

391

392

                if (isset($options['statusCodes'])) {

393

                        $this->httpCodes($options['statusCodes']);

394

395

                if (isset($options['status'])) {

396

                        $this->statusCode($options['status']);

397

398

                if (isset($options['type'])) {

399

                        $this->type($options['type']);

400

401

                if (!isset($options['charset'])) {

402

                        $options['charset'] = Configure::read('App.encoding');

403

404

                $this->charset($options['charset']);

405

406

407

/**

408

 * Sends the complete response to the client including headers and message body.

409

 * Will echo out the content in the response body.

410

411

 * @return void

412

*/

413

        public function send() {

414

                if (isset($this->_headers['Location']) && $this->_status === 200) {

415

                        $this->statusCode(302);

416

417

418

                $codeMessage = $this->_statusCodes[$this->_status];

419

                $this->_setCookies();

420

                $this->_sendHeader("{$this->_protocol} {$this->_status} {$codeMessage}");

421

                $this->_setContent();

422

                $this->_setContentLength();

423

                $this->_setContentType();

424

                foreach ($this->_headers as $header => $values) {

425

                        foreach ((array)$values as $value) {

426

                                $this->_sendHeader($header, $value);

427

428

429

                if ($this->_file) {

430

                        $this->_sendFile($this->_file, $this->_fileRange);

431

                        $this->_file = $this->_fileRange = null;

432

                } else {

433

                        $this->_sendContent($this->_body);

/**

438

 * Sets the cookies that have been added via CakeResponse::cookie() before any

439

 * other output is sent to the client. Will set the cookies in the order they

440

 * have been set.

441

442

 * @return void

443

*/

444

        protected function _setCookies() {

445

                foreach ($this->_cookies as $name => $c) {

446

                        setcookie(

447

                                $name, $c['value'], $c['expire'], $c['path'],

448

                                $c['domain'], $c['secure'], $c['httpOnly']

449

);

/**

454

 * Formats the Content-Type header based on the configured contentType and charset

455

 * the charset will only be set in the header if the response is of type text

456

457

 * @return void

458

*/

459

        protected function _setContentType() {

460

                if (in_array($this->_status, array(304, 204))) {

461

                        return;

462

463

                $whitelist = array(

464

                        'application/javascript', 'application/json', 'application/xml', 'application/rss+xml'

465

);

466

467

                $charset = false;

468

                if ($this->_charset &&

469

                        (strpos($this->_contentType, 'text/') === 0 || in_array($this->_contentType, $whitelist))

470

) {

471

                        $charset = true;

472

473

474

                if ($charset) {

475

                        $this->header('Content-Type', "{$this->_contentType}; charset={$this->_charset}");

476

                } else {

477

                        $this->header('Content-Type', "{$this->_contentType}");

/**

482

 * Sets the response body to an empty text if the status code is 204 or 304

483

484

 * @return void

485

*/

486

        protected function _setContent() {

487

                if (in_array($this->_status, array(304, 204))) {

488

                        $this->body('');

/**

493

 * Calculates the correct Content-Length and sets it as a header in the response

494

 * Will not set the value if already set or if the output is compressed.

495

496

 * @return void

497

*/

498

        protected function _setContentLength() {

499

                $shouldSetLength = !isset($this->_headers['Content-Length']) && !in_array($this->_status, range(301, 307));

500

                if (isset($this->_headers['Content-Length']) && $this->_headers['Content-Length'] === false) {

501

                        unset($this->_headers['Content-Length']);

502

                        return;

503

504

                if ($shouldSetLength && !$this->outputCompressed()) {

505

                        $offset = ob_get_level() ? ob_get_length() : 0;

506

                        if (ini_get('mbstring.func_overload') & 2 && function_exists('mb_strlen')) {

507

                                $this->length($offset + mb_strlen($this->_body, '8bit'));

508

                        } else {

509

                                $this->length($this->_headers['Content-Length'] = $offset + strlen($this->_body));

/**

515

 * Sends a header to the client.

516

517

 * Will skip sending headers if headers have already been sent.

518

519

 * @param string $name the header name

520

 * @param string $value the header value

521

 * @return void

522

*/

523

        protected function _sendHeader($name, $value = null) {

524

                if (headers_sent($filename, $linenum)) {

525

                        return;

526

527

                if ($value === null) {

528

                        header($name);

529

                } else {

530

                        header("{$name}: {$value}");

/**

535

 * Sends a content string to the client.

536

537

 * @param string $content string to send as response body

538

 * @return void

539

*/

540

        protected function _sendContent($content) {

541

                echo $content;

542

543

544

/**

545

 * Buffers a header string to be sent

546

 * Returns the complete list of buffered headers

547

548

 * ### Single header

549

 * e.g `header('Location', 'http://example.com');`

550

551

 * ### Multiple headers

552

 * e.g `header(array('Location' => 'http://example.com', 'X-Extra' => 'My header'));`

553

554

 * ### String header

555

 * e.g `header('WWW-Authenticate: Negotiate');`

556

557

 * ### Array of string headers

558

 * e.g `header(array('WWW-Authenticate: Negotiate', 'Content-type: application/pdf'));`

559

560

 * Multiple calls for setting the same header name will have the same effect as setting the header once

561

 * with the last value sent for it

562

 *  e.g `header('WWW-Authenticate: Negotiate'); header('WWW-Authenticate: Not-Negotiate');`

563

 * will have the same effect as only doing `header('WWW-Authenticate: Not-Negotiate');`

564

565

 * @param string|array $header An array of header strings or a single header string

566

 *        - an associative array of "header name" => "header value" is also accepted

567

 *        - an array of string headers is also accepted

568

 * @param string|array $value The header value(s)

569

 * @return array list of headers to be sent

570

*/

571

        public function header($header = null, $value = null) {

572

                if ($header === null) {

573

                        return $this->_headers;

574

575

                $headers = is_array($header) ? $header : array($header => $value);

576

                foreach ($headers as $header => $value) {

577

                        if (is_numeric($header)) {

578

                                list($header, $value) = array($value, null);

579

580

                        if ($value === null) {

581

                                list($header, $value) = explode(':', $header, 2);

582

583

                        $this->_headers[$header] = is_array($value) ? array_map('trim', $value) : trim($value);

584

585

                return $this->_headers;

586

587

588

/**

589

 * Accessor for the location header.

590

591

 * Get/Set the Location header value.

592

593

 * @param null|string $url Either null to get the current location, or a string to set one.

594

 * @return string|null When setting the location null will be returned. When reading the location

595

 *    a string of the current location header value (if any) will be returned.

596

*/

597

        public function location($url = null) {

598

                if ($url === null) {

599

                        $headers = $this->header();

600

                        return isset($headers['Location']) ? $headers['Location'] : null;

601

602

                $this->header('Location', $url);

603

                return null;

604

605

606

/**

607

 * Buffers the response message to be sent

608

 * if $content is null the current buffer is returned

609

610

 * @param string $content the string message to be sent

611

 * @return string current message buffer if $content param is passed as null

612

*/

613

        public function body($content = null) {

614

                if ($content === null) {

615

                        return $this->_body;

616

617

                return $this->_body = $content;

618

619

620

/**

621

 * Sets the HTTP status code to be sent

622

 * if $code is null the current code is returned

623

624

 * @param int $code the HTTP status code

625

 * @return int current status code

626

 * @throws CakeException When an unknown status code is reached.

627

*/

628

        public function statusCode($code = null) {

629

                if ($code === null) {

630

                        return $this->_status;

631

632

                if (!isset($this->_statusCodes[$code])) {

633

                        throw new CakeException(__d('cake_dev', 'Unknown status code'));

634

635

                return $this->_status = $code;

636

637

638

/**

639

 * Queries & sets valid HTTP response codes & messages.

640

641

 * @param int|array $code If $code is an integer, then the corresponding code/message is

642

 *        returned if it exists, null if it does not exist. If $code is an array, then the

643

 *        keys are used as codes and the values as messages to add to the default HTTP

644

 *        codes. The codes must be integers greater than 99 and less than 1000. Keep in

645

 *        mind that the HTTP specification outlines that status codes begin with a digit

646

 *        between 1 and 5, which defines the class of response the client is to expect.

647

 *        Example:

648

649

 *        httpCodes(404); // returns array(404 => 'Not Found')

650

651

 *        httpCodes(array(

652

 *            381 => 'Unicorn Moved',

653

 *            555 => 'Unexpected Minotaur'

654

 *        )); // sets these new values, and returns true

655

656

 *        httpCodes(array(

657

 *            0 => 'Nothing Here',

658

 *            -1 => 'Reverse Infinity',

659

 *            12345 => 'Universal Password',

660

 *            'Hello' => 'World'

661

 *        )); // throws an exception due to invalid codes

662

663

 *        For more on HTTP status codes see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6.1

664

665

 * @return mixed associative array of the HTTP codes as keys, and the message

666

 *    strings as values, or null of the given $code does not exist.

667

 * @throws CakeException If an attempt is made to add an invalid status code

668

*/

669

        public function httpCodes($code = null) {

670

                if (empty($code)) {

671

                        return $this->_statusCodes;

672

673

                if (is_array($code)) {

674

                        $codes = array_keys($code);

675

                        $min = min($codes);

676

                        if (!is_int($min) || $min < 100 || max($codes) > 999) {

677

                                throw new CakeException(__d('cake_dev', 'Invalid status code'));

678

679

                        $this->_statusCodes = $code + $this->_statusCodes;

680

                        return true;

681

682

                if (!isset($this->_statusCodes[$code])) {

683

                        return null;

684

685

                return array($code => $this->_statusCodes[$code]);

686

687

688

/**

689

 * Sets the response content type. It can be either a file extension

690

 * which will be mapped internally to a mime-type or a string representing a mime-type

691

 * if $contentType is null the current content type is returned

692

 * if $contentType is an associative array, content type definitions will be stored/replaced

693

694

 * ### Setting the content type

695

696

 * e.g `type('jpg');`

697

698

 * ### Returning the current content type

699

700

 * e.g `type();`

701

702

 * ### Storing content type definitions

703

704

 * e.g `type(array('keynote' => 'application/keynote', 'bat' => 'application/bat'));`

705

706

 * ### Replacing a content type definition

707

708

 * e.g `type(array('jpg' => 'text/plain'));`

709

710

 * @param string $contentType Content type key.

711

 * @return mixed current content type or false if supplied an invalid content type

712

*/

713

        public function type($contentType = null) {

714

                if ($contentType === null) {

715

                        return $this->_contentType;

716

717

                if (is_array($contentType)) {

718

                        foreach ($contentType as $type => $definition) {

719

                                $this->_mimeTypes[$type] = $definition;

720

721

                        return $this->_contentType;

722

723

                if (isset($this->_mimeTypes[$contentType])) {

724

                        $contentType = $this->_mimeTypes[$contentType];

725

                        $contentType = is_array($contentType) ? current($contentType) : $contentType;

726

727

                if (strpos($contentType, '/') === false) {

728

                        return false;

729

730

                return $this->_contentType = $contentType;

731

732

733

/**

734

 * Returns the mime type definition for an alias

735

736

 * e.g `getMimeType('pdf'); // returns 'application/pdf'`

737

738

 * @param string $alias the content type alias to map

739

 * @return mixed string mapped mime type or false if $alias is not mapped

740

*/

741

        public function getMimeType($alias) {

742

                if (isset($this->_mimeTypes[$alias])) {

743

                        return $this->_mimeTypes[$alias];

744

745

                return false;

746

747

748

/**

749

 * Maps a content-type back to an alias

750

751

 * e.g `mapType('application/pdf'); // returns 'pdf'`

752

753

 * @param string|array $ctype Either a string content type to map, or an array of types.

754

 * @return mixed Aliases for the types provided.

755

*/

756

        public function mapType($ctype) {

757

                if (is_array($ctype)) {

758

                        return array_map(array($this, 'mapType'), $ctype);

759

760

761

                foreach ($this->_mimeTypes as $alias => $types) {

762

                        if (in_array($ctype, (array)$types)) {

763

                                return $alias;

764

765

766

                return null;

767

768

769

/**

770

 * Sets the response charset

771

 * if $charset is null the current charset is returned

772

773

 * @param string $charset Character set string.

774

 * @return string current charset

775

*/

776

        public function charset($charset = null) {

777

                if ($charset === null) {

778

                        return $this->_charset;

779

780

                return $this->_charset = $charset;

781

782

783

/**

784

 * Sets the correct headers to instruct the client to not cache the response

785

786

 * @return void

787

*/

788

        public function disableCache() {

789

                $this->header(array(

790

                        'Expires' => 'Mon, 26 Jul 1997 05:00:00 GMT',

791

                        'Last-Modified' => gmdate("D, d M Y H:i:s") . " GMT",

792

                        'Cache-Control' => 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0'

793

));

794

795

796

/**

797

 * Sets the correct headers to instruct the client to cache the response.

798

799

 * @param string $since a valid time since the response text has not been modified

800

 * @param string $time a valid time for cache expiry

801

 * @return void

802

*/

803

        public function cache($since, $time = '+1 day') {

804

                if (!is_int($time)) {

805

                        $time = strtotime($time);

806

807

                $this->header(array(

808

                        'Date' => gmdate("D, j M Y G:i:s ", time()) . 'GMT'

809

));

810

                $this->modified($since);

811

                $this->expires($time);

812

                $this->sharable(true);

813

                $this->maxAge($time - time());

814

815

816

/**

817

 * Sets whether a response is eligible to be cached by intermediate proxies

818

 * This method controls the `public` or `private` directive in the Cache-Control

819

 * header

820

821

 * @param bool $public If set to true, the Cache-Control header will be set as public

822

 *   if set to false, the response will be set to private

823

 *   if no value is provided, it will return whether the response is sharable or not

824

 * @param int $time time in seconds after which the response should no longer be considered fresh

825

 * @return bool

826

*/

827

        public function sharable($public = null, $time = null) {

828

                if ($public === null) {

829

                        $public = array_key_exists('public', $this->_cacheDirectives);

830

                        $private = array_key_exists('private', $this->_cacheDirectives);

831

                        $noCache = array_key_exists('no-cache', $this->_cacheDirectives);

832

                        if (!$public && !$private && !$noCache) {

833

                                return null;

834

835

                        $sharable = $public || !($private || $noCache);

836

                        return $sharable;

837

838

                if ($public) {

839

                        $this->_cacheDirectives['public'] = true;

840

                        unset($this->_cacheDirectives['private']);

841

                } else {

842

                        $this->_cacheDirectives['private'] = true;

843

                        unset($this->_cacheDirectives['public']);

844

845

846

                $this->maxAge($time);

847

                if (!$time) {

848

                        $this->_setCacheControl();

849

850

                return (bool)$public;

851

852

853

/**

854

 * Sets the Cache-Control s-maxage directive.

855

 * The max-age is the number of seconds after which the response should no longer be considered

856

 * a good candidate to be fetched from a shared cache (like in a proxy server).

857

 * If called with no parameters, this function will return the current max-age value if any

858

859

 * @param int $seconds if null, the method will return the current s-maxage value

860

 * @return int

861

*/

862

        public function sharedMaxAge($seconds = null) {

863

                if ($seconds !== null) {

864

                        $this->_cacheDirectives['s-maxage'] = $seconds;

865

                        $this->_setCacheControl();

866

867

                if (isset($this->_cacheDirectives['s-maxage'])) {

868

                        return $this->_cacheDirectives['s-maxage'];

869

870

                return null;

871

872

873

/**

874

 * Sets the Cache-Control max-age directive.

875

 * The max-age is the number of seconds after which the response should no longer be considered

876

 * a good candidate to be fetched from the local (client) cache.

877

 * If called with no parameters, this function will return the current max-age value if any

878

879

 * @param int $seconds if null, the method will return the current max-age value

880

 * @return int

881

*/

882

        public function maxAge($seconds = null) {

883

                if ($seconds !== null) {

884

                        $this->_cacheDirectives['max-age'] = $seconds;

885

                        $this->_setCacheControl();

886

887

                if (isset($this->_cacheDirectives['max-age'])) {

888

                        return $this->_cacheDirectives['max-age'];

889

890

                return null;

891

892

893

/**

894

 * Sets the Cache-Control must-revalidate directive.

895

 * must-revalidate indicates that the response should not be served

896

 * stale by a cache under any circumstance without first revalidating

897

 * with the origin.

898

 * If called with no parameters, this function will return whether must-revalidate is present.

899

900

 * @param bool $enable If null returns whether directive is set, if boolean

901

 *   sets or unsets directive.

902

 * @return bool

903

*/

904

        public function mustRevalidate($enable = null) {

905

                if ($enable !== null) {

906

                        if ($enable) {

907

                                $this->_cacheDirectives['must-revalidate'] = true;

908

                        } else {

909

                                unset($this->_cacheDirectives['must-revalidate']);

910

911

                        $this->_setCacheControl();

912

913

                return array_key_exists('must-revalidate', $this->_cacheDirectives);

914

915

916

/**

917

 * Helper method to generate a valid Cache-Control header from the options set

918

 * in other methods

919

920

 * @return void

921

*/

922

        protected function _setCacheControl() {

923

                $control = '';

924

                foreach ($this->_cacheDirectives as $key => $val) {

925

                        $control .= $val === true ? $key : sprintf('%s=%s', $key, $val);

926

                        $control .= ', ';

927

928

                $control = rtrim($control, ', ');

929

                $this->header('Cache-Control', $control);

930

931

932

/**

933

 * Sets the Expires header for the response by taking an expiration time

934

 * If called with no parameters it will return the current Expires value

935

936

 * ## Examples:

937

938

 * `$response->expires('now')` Will Expire the response cache now

939

 * `$response->expires(new DateTime('+1 day'))` Will set the expiration in next 24 hours

940

 * `$response->expires()` Will return the current expiration header value

941

942

 * @param string|DateTime $time Valid time string or DateTime object.

943

 * @return string

944

*/

945

        public function expires($time = null) {

946

                if ($time !== null) {

947

                        $date = $this->_getUTCDate($time);

948

                        $this->_headers['Expires'] = $date->format('D, j M Y H:i:s') . ' GMT';

949

950

                if (isset($this->_headers['Expires'])) {

951

                        return $this->_headers['Expires'];

952

953

                return null;

954

955

956

/**

957

 * Sets the Last-Modified header for the response by taking a modification time

958

 * If called with no parameters it will return the current Last-Modified value

959

960

 * ## Examples:

961

962

 * `$response->modified('now')` Will set the Last-Modified to the current time

963

 * `$response->modified(new DateTime('+1 day'))` Will set the modification date in the past 24 hours

964

 * `$response->modified()` Will return the current Last-Modified header value

965

966

 * @param string|DateTime $time Valid time string or DateTime object.

967

 * @return string

968

*/

969

        public function modified($time = null) {

970

                if ($time !== null) {

971

                        $date = $this->_getUTCDate($time);

972

                        $this->_headers['Last-Modified'] = $date->format('D, j M Y H:i:s') . ' GMT';

973

974

                if (isset($this->_headers['Last-Modified'])) {

975

                        return $this->_headers['Last-Modified'];

976

977

                return null;

978

979

980

/**

981

 * Sets the response as Not Modified by removing any body contents

982

 * setting the status code to "304 Not Modified" and removing all

983

 * conflicting headers

984

985

 * @return void

986

*/

987

        public function notModified() {

988

                $this->statusCode(304);

989

                $this->body('');

990

                $remove = array(

991

                        'Allow',

992

                        'Content-Encoding',

993

                        'Content-Language',

994

                        'Content-Length',

995

                        'Content-MD5',

996

                        'Content-Type',

997

                        'Last-Modified'

998

);

999

                foreach ($remove as $header) {

1000

                        unset($this->_headers[$header]);

/**

1005

 * Sets the Vary header for the response, if an array is passed,

1006

 * values will be imploded into a comma separated string. If no

1007

 * parameters are passed, then an array with the current Vary header

1008

 * value is returned

1009

1010

 * @param string|array $cacheVariances a single Vary string or an array

1011

 *   containing the list for variances.

1012

 * @return array

1013

*/

1014

        public function vary($cacheVariances = null) {

1015

                if ($cacheVariances !== null) {

1016

                        $cacheVariances = (array)$cacheVariances;

1017

                        $this->_headers['Vary'] = implode(', ', $cacheVariances);

1018

1019

                if (isset($this->_headers['Vary'])) {

1020

                        return explode(', ', $this->_headers['Vary']);

1021

1022

                return null;

1023

1024

1025

/**

1026

 * Sets the response Etag, Etags are a strong indicative that a response

1027

 * can be cached by a HTTP client. A bad way of generating Etags is

1028

 * creating a hash of the response output, instead generate a unique

1029

 * hash of the unique components that identifies a request, such as a

1030

 * modification time, a resource Id, and anything else you consider it

1031

 * makes it unique.

1032

1033

 * Second parameter is used to instruct clients that the content has

1034

 * changed, but sematicallly, it can be used as the same thing. Think

1035

 * for instance of a page with a hit counter, two different page views

1036

 * are equivalent, but they differ by a few bytes. This leaves off to

1037

 * the Client the decision of using or not the cached page.

1038

1039

 * If no parameters are passed, current Etag header is returned.

1040

1041

 * @param string $tag Tag to set.

1042

 * @param bool $weak whether the response is semantically the same as

1043

 *   other with the same hash or not

1044

 * @return string

1045

*/

1046

        public function etag($tag = null, $weak = false) {

1047

                if ($tag !== null) {

1048

                        $this->_headers['Etag'] = sprintf('%s"%s"', ($weak) ? 'W/' : null, $tag);

1049

1050

                if (isset($this->_headers['Etag'])) {

1051

                        return $this->_headers['Etag'];

1052

1053

                return null;

1054

1055

1056

/**

1057

 * Returns a DateTime object initialized at the $time param and using UTC

1058

 * as timezone

1059

1060

 * @param string|DateTime $time Valid time string or unix timestamp or DateTime object.

1061

 * @return DateTime

1062

*/

1063

        protected function _getUTCDate($time = null) {

1064

                if ($time instanceof DateTime) {

1065

                        $result = clone $time;

1066

                } elseif (is_int($time)) {

1067

                        $result = new DateTime(date('Y-m-d H:i:s', $time));

1068

                } else {

1069

                        $result = new DateTime($time);

1070

1071

                $result->setTimeZone(new DateTimeZone('UTC'));

1072

                return $result;

1073

1074

1075

/**

1076

 * Sets the correct output buffering handler to send a compressed response. Responses will

1077

 * be compressed with zlib, if the extension is available.

1078

1079

 * @return bool false if client does not accept compressed responses or no handler is available, true otherwise

1080

*/

1081

        public function compress() {

1082

                $compressionEnabled = ini_get("zlib.output_compression") !== '1' &&

1083

                        extension_loaded("zlib") &&

1084

                        (strpos(env('HTTP_ACCEPT_ENCODING'), 'gzip') !== false);

1085

                return $compressionEnabled && ob_start('ob_gzhandler');

1086

1087

1088

/**

1089

 * Returns whether the resulting output will be compressed by PHP

1090

1091

 * @return bool

1092

*/

1093

        public function outputCompressed() {

1094

                return strpos(env('HTTP_ACCEPT_ENCODING'), 'gzip') !== false

1095

                        && (ini_get("zlib.output_compression") === '1' || in_array('ob_gzhandler', ob_list_handlers()));

1096

1097

1098

/**

1099

 * Sets the correct headers to instruct the browser to download the response as a file.

1100

1101

 * @param string $filename the name of the file as the browser will download the response

1102

 * @return void

1103

*/

1104

        public function download($filename) {

1105

                $this->header('Content-Disposition', 'attachment; filename="' . $filename . '"');

1106

1107

1108

/**

1109

 * Sets the protocol to be used when sending the response. Defaults to HTTP/1.1

1110

 * If called with no arguments, it will return the current configured protocol

1111

1112

 * @param string $protocol Protocol to be used for sending response.

1113

 * @return string protocol currently set

1114

*/

1115

        public function protocol($protocol = null) {

1116

                if ($protocol !== null) {

1117

                        $this->_protocol = $protocol;

1118

1119

                return $this->_protocol;

1120

1121

1122

/**

1123

 * Sets the Content-Length header for the response

1124

 * If called with no arguments returns the last Content-Length set

1125

1126

 * @param int $bytes Number of bytes

1127

 * @return int|null

1128

*/

1129

        public function length($bytes = null) {

1130

                if ($bytes !== null) {

1131

                        $this->_headers['Content-Length'] = $bytes;

1132

1133

                if (isset($this->_headers['Content-Length'])) {

1134

                        return $this->_headers['Content-Length'];

1135

1136

                return null;

1137

1138

1139

/**

1140

 * Checks whether a response has not been modified according to the 'If-None-Match'

1141

 * (Etags) and 'If-Modified-Since' (last modification date) request

1142

 * headers. If the response is detected to be not modified, it

1143

 * is marked as so accordingly so the client can be informed of that.

1144

1145

 * In order to mark a response as not modified, you need to set at least

1146

 * the Last-Modified etag response header before calling this method. Otherwise

1147

 * a comparison will not be possible.

1148

1149

 * @param CakeRequest $request Request object

1150

 * @return bool whether the response was marked as not modified or not.

1151

*/

1152

        public function checkNotModified(CakeRequest $request) {

1153

                $etags = preg_split('/\s*,\s*/', $request->header('If-None-Match'), null, PREG_SPLIT_NO_EMPTY);

1154

                $modifiedSince = $request->header('If-Modified-Since');

1155

                if ($responseTag = $this->etag()) {

1156

                        $etagMatches = in_array('*', $etags) || in_array($responseTag, $etags);

1157

1158

                if ($modifiedSince) {

1159

                        $timeMatches = strtotime($this->modified()) === strtotime($modifiedSince);

1160

1161

                $checks = compact('etagMatches', 'timeMatches');

1162

                if (empty($checks)) {

1163

                        return false;

1164

1165

                $notModified = !in_array(false, $checks, true);

1166

                if ($notModified) {

1167

                        $this->notModified();

1168

1169

                return $notModified;

1170

1171

1172

/**

1173

 * String conversion. Fetches the response body as a string.

1174

 * Does *not* send headers.

1175

1176

 * @return string

1177

*/

1178

        public function __toString() {

1179

                return (string)$this->_body;

1180

1181

1182

/**

1183

 * Getter/Setter for cookie configs

1184

1185

 * This method acts as a setter/getter depending on the type of the argument.

1186

 * If the method is called with no arguments, it returns all configurations.

1187

1188

 * If the method is called with a string as argument, it returns either the

1189

 * given configuration if it is set, or null, if it's not set.

1190

1191

 * If the method is called with an array as argument, it will set the cookie

1192

 * configuration to the cookie container.

1193

1194

 * @param array $options Either null to get all cookies, string for a specific cookie

1195

 *  or array to set cookie.

1196

1197

 * ### Options (when setting a configuration)

1198

 *  - name: The Cookie name

1199

 *  - value: Value of the cookie

1200

 *  - expire: Time the cookie expires in

1201

 *  - path: Path the cookie applies to

1202

 *  - domain: Domain the cookie is for.

1203

 *  - secure: Is the cookie https?

1204

 *  - httpOnly: Is the cookie available in the client?

1205

1206

 * ## Examples

1207

1208

 * ### Getting all cookies

1209

1210

 * `$this->cookie()`

1211

1212

 * ### Getting a certain cookie configuration

1213

1214

 * `$this->cookie('MyCookie')`

1215

1216

 * ### Setting a cookie configuration

1217

1218

 * `$this->cookie((array) $options)`

1219

1220

 * @return mixed

1221

*/

1222

        public function cookie($options = null) {

1223

                if ($options === null) {

1224

                        return $this->_cookies;

1225

1226

1227

                if (is_string($options)) {

1228

                        if (!isset($this->_cookies[$options])) {

1229

                                return null;

1230

1231

                        return $this->_cookies[$options];

1232

1233

1234

                $defaults = array(

1235

                        'name' => 'CakeCookie[default]',

1236

                        'value' => '',

1237

                        'expire' => 0,

1238

                        'path' => '/',

1239

                        'domain' => '',

1240

                        'secure' => false,

1241

                        'httpOnly' => false

1242

);

1243

                $options += $defaults;

1244

1245

                $this->_cookies[$options['name']] = $options;

1246

1247

1248

/**

1249

 * Setup access for origin and methods on cross origin requests

1250

1251

 * This method allow multiple ways to setup the domains, see the examples

1252

1253

 * ### Full URI

1254

 * e.g `cors($request, 'http://www.cakephp.org');`

1255

1256

 * ### URI with wildcard

1257

 * e.g `cors($request, 'http://*.cakephp.org');`

1258

1259

 * ### Ignoring the requested protocol

1260

 * e.g `cors($request, 'www.cakephp.org');`

1261

1262

 * ### Any URI

1263

 * e.g `cors($request, '*');`

1264

1265

 * ### Whitelist of URIs

1266

 * e.g `cors($request, array('http://www.cakephp.org', '*.google.com', 'https://myproject.github.io'));`

1267

1268

 * @param CakeRequest $request Request object

1269

 * @param string|array $allowedDomains List of allowed domains, see method description for more details

1270

 * @param string|array $allowedMethods List of HTTP verbs allowed

1271

 * @param string|array $allowedHeaders List of HTTP headers allowed

1272

 * @return void

1273

*/

1274

        public function cors(CakeRequest $request, $allowedDomains, $allowedMethods = array(), $allowedHeaders = array()) {

1275

                $origin = $request->header('Origin');

1276

                if (!$origin) {

1277

                        return;

1278

1279

1280

                $allowedDomains = $this->_normalizeCorsDomains((array)$allowedDomains, $request->is('ssl'));

1281

                foreach ($allowedDomains as $domain) {

1282

                        if (!preg_match($domain['preg'], $origin)) {

1283

                                continue;

1284

1285

                        $this->header('Access-Control-Allow-Origin', $domain['original'] === '*' ? '*' : $origin);

1286

                        $allowedMethods && $this->header('Access-Control-Allow-Methods', implode(', ', (array)$allowedMethods));

1287

                        $allowedHeaders && $this->header('Access-Control-Allow-Headers', implode(', ', (array)$allowedHeaders));

1288

                        break;

/**

1293

 * Normalize the origin to regular expressions and put in an array format

1294

1295

 * @param array $domains Domains to normalize

1296

 * @param bool $requestIsSSL Whether it's a SSL request.

1297

 * @return array

1298

*/

1299

        protected function _normalizeCorsDomains($domains, $requestIsSSL = false) {

1300

                $result = array();

1301

                foreach ($domains as $domain) {

1302

                        if ($domain === '*') {

1303

                                $result[] = array('preg' => '@.@', 'original' => '*');

1304

                                continue;

1305

1306

1307

                        $original = $preg = $domain;

1308

                        if (strpos($domain, '://') === false) {

1309

                                $preg = ($requestIsSSL ? 'https://' : 'http://') . $domain;

1310

1311

                        $preg = '@' . str_replace('*', '.*', $domain) . '@';

1312

                        $result[] = compact('original', 'preg');

1313

1314

                return $result;

1315

1316

1317

/**

1318

 * Setup for display or download the given file.

1319

1320

 * If $_SERVER['HTTP_RANGE'] is set a slice of the file will be

1321

 * returned instead of the entire file.

1322

1323

 * ### Options keys

1324

1325

 * - name: Alternate download name

1326

 * - download: If `true` sets download header and forces file to be downloaded rather than displayed in browser

1327

1328

 * @param string $path Path to file. If the path is not an absolute path that resolves

1329

 *   to a file, `APP` will be prepended to the path.

1330

 * @param array $options Options See above.

1331

 * @return void

1332

 * @throws NotFoundException

1333

*/

1334

        public function file($path, $options = array()) {

1335

                $options += array(

1336

                        'name' => null,

1337

                        'download' => null

1338

);

1339

1340

                if (strpos($path, '../') !== false || strpos($path, '..\\') !== false) {

1341

                        throw new NotFoundException(__d(

1342

                                'cake_dev',

1343

                                'The requested file contains `..` and will not be read.'

1344

));

1345

1346

1347

                if (!is_file($path)) {

1348

                        $path = APP . $path;

1349

1350

1351

                $file = new File($path);

1352

                if (!$file->exists() || !$file->readable()) {

1353

                        if (Configure::read('debug')) {

1354

                                throw new NotFoundException(__d('cake_dev', 'The requested file %s was not found or not readable', $path));

1355

1356

                        throw new NotFoundException(__d('cake', 'The requested file was not found'));

1357

1358

1359

                $extension = strtolower($file->ext());

1360

                $download = $options['download'];

1361

                if ((!$extension || $this->type($extension) === false) && $download === null) {

1362

                        $download = true;

1363

1364

1365

                $fileSize = $file->size();

1366

                if ($download) {

1367

                        $agent = env('HTTP_USER_AGENT');

1368

1369

                        if (preg_match('%Opera(/| )([0-9].[0-9]{1,2})%', $agent)) {

1370

                                $contentType = 'application/octet-stream';

1371

                        } elseif (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $agent)) {

1372

                                $contentType = 'application/force-download';

1373

1374

1375

                        if (!empty($contentType)) {

1376

                                $this->type($contentType);

1377

1378

                        if ($options['name'] === null) {

1379

                                $name = $file->name;

1380

                        } else {

1381

                                $name = $options['name'];

1382

1383

                        $this->download($name);

1384

                        $this->header('Content-Transfer-Encoding', 'binary');

1385

1386

1387

                $this->header('Accept-Ranges', 'bytes');

1388

                $httpRange = env('HTTP_RANGE');

1389

                if (isset($httpRange)) {

1390

                        $this->_fileRange($file, $httpRange);

1391

                } else {

1392

                        $this->header('Content-Length', $fileSize);

1393

1394

1395

                $this->_clearBuffer();

1396

                $this->_file = $file;

1397

1398

1399

/**

1400

 * Apply a file range to a file and set the end offset.

1401

1402

 * If an invalid range is requested a 416 Status code will be used

1403

 * in the response.

1404

1405

 * @param File $file The file to set a range on.

1406

 * @param string $httpRange The range to use.

1407

 * @return void

1408

*/

1409

        protected function _fileRange($file, $httpRange) {

1410

                list(, $range) = explode('=', $httpRange);

1411

                list($start, $end) = explode('-', $range);

1412

1413

                $fileSize = $file->size();

1414

                $lastByte = $fileSize - 1;

1415

1416

                if ($start === '') {

1417

                        $start = $fileSize - $end;

1418

                        $end = $lastByte;

1419

1420

                if ($end === '') {

1421

                        $end = $lastByte;

1422

1423

1424

                if ($start > $end || $end > $lastByte || $start > $lastByte) {

1425

                        $this->statusCode(416);

1426

                        $this->header(array(

1427

                                'Content-Range' => 'bytes 0-' . $lastByte . '/' . $fileSize

1428

));

1429

                        return;

1430

1431

1432

                $this->header(array(

1433

                        'Content-Length' => $end - $start + 1,

1434

                        'Content-Range' => 'bytes ' . $start . '-' . $end . '/' . $fileSize

1435

));

1436

1437

                $this->statusCode(206);

1438

                $this->_fileRange = array($start, $end);

1439

1440

1441

/**

1442

 * Reads out a file, and echos the content to the client.

1443

1444

 * @param File $file File object

1445

 * @param array $range The range to read out of the file.

1446

 * @return bool True is whole file is echoed successfully or false if client connection is lost in between

1447

*/

1448

        protected function _sendFile($file, $range) {

1449

                $compress = $this->outputCompressed();

1450

                $file->open('rb');

1451

1452

                $end = $start = false;

1453

                if ($range) {

1454

                        list($start, $end) = $range;

1455

1456

                if ($start !== false) {

1457

                        $file->offset($start);

1458

1459

1460

                $bufferSize = 8192;

1461

                set_time_limit(0);

1462

                session_write_close();

1463

                while (!feof($file->handle)) {

1464

                        if (!$this->_isActive()) {

1465

                                $file->close();

1466

                                return false;

1467

1468

                        $offset = $file->offset();

1469

                        if ($end && $offset >= $end) {

1470

                                break;

1471

1472

                        if ($end && $offset + $bufferSize >= $end) {

1473

                                $bufferSize = $end - $offset + 1;

1474

1475

                        echo fread($file->handle, $bufferSize);

1476

                        if (!$compress) {

1477

                                $this->_flushBuffer();

1478

1479

1480

                $file->close();

1481

                return true;

1482

1483

1484

/**

1485

 * Returns true if connection is still active

1486

1487

 * @return bool

1488

*/

1489

        protected function _isActive() {

1490

                return connection_status() === CONNECTION_NORMAL && !connection_aborted();

1491

1492

1493

/**

1494

 * Clears the contents of the topmost output buffer and discards them

1495

1496

 * @return bool

1497

*/

1498

        protected function _clearBuffer() {

1499

                if (ob_get_length()) {

1500

                        return ob_end_clean();

1501

1502

                return true;

1503

1504

1505

/**

1506

 * Flushes the contents of the output buffer

1507

1508

 * @return void

1509

*/

1510

        protected function _flushBuffer() {

1511

                //@codingStandardsIgnoreStart

1512

                @flush();

1513

                if (ob_get_level()) {

1514

                        @ob_flush();

1515

1516

                //@codingStandardsIgnoreEnd

1517

1518

1519

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