media.php

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<?php
/* SVN FILE: $Id: media.php 8101 2009-03-15 00:19:02Z phpnut $ */
/**
 * Methods to display or download any type of file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs.view
 * @since         CakePHP(tm) v 1.2.0.5714
 * @version       $Revision: 8101 $
 * @modifiedby    $LastChangedBy: phpnut $
 * @lastmodified  $Date: 2009-03-14 20:19:02 -0400 (Sat, 14 Mar 2009) $
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
 */
class MediaView extends View {
/**
 * Holds known mime type mappings
 *
 * @var array
 * @access public
 */
    var $mimeType = array('ai' => 'application/postscript', 'bcpio' => 'application/x-bcpio', 'bin' => 'application/octet-stream',
                                'ccad' => 'application/clariscad', 'cdf' => 'application/x-netcdf', 'class' => 'application/octet-stream',
                                'cpio' => 'application/x-cpio', 'cpt' => 'application/mac-compactpro', 'csh' => 'application/x-csh',
                                'csv' => 'application/csv', 'dcr' => 'application/x-director', 'dir' => 'application/x-director',
                                'dms' => 'application/octet-stream', 'doc' => 'application/msword', 'drw' => 'application/drafting',
                                'dvi' => 'application/x-dvi', 'dwg' => 'application/acad', 'dxf' => 'application/dxf', 'dxr' => 'application/x-director',
                                'eps' => 'application/postscript', 'exe' => 'application/octet-stream', 'ez' => 'application/andrew-inset',
                                'flv' => 'video/x-flv', 'gtar' => 'application/x-gtar', 'gz' => 'application/x-gzip',
                                'bz2' => 'application/x-bzip', '7z' => 'application/x-7z-compressed', 'hdf' => 'application/x-hdf',
                                'hqx' => 'application/mac-binhex40', 'ips' => 'application/x-ipscript', 'ipx' => 'application/x-ipix',
                                'js' => 'application/x-javascript', 'latex' => 'application/x-latex', 'lha' => 'application/octet-stream',
                                'lsp' => 'application/x-lisp', 'lzh' => 'application/octet-stream', 'man' => 'application/x-troff-man',
                                'me' => 'application/x-troff-me', 'mif' => 'application/vnd.mif', 'ms' => 'application/x-troff-ms',
                                'nc' => 'application/x-netcdf', 'oda' => 'application/oda', 'pdf' => 'application/pdf',
                                'pgn' => 'application/x-chess-pgn', 'pot' => 'application/mspowerpoint', 'pps' => 'application/mspowerpoint',
                                'ppt' => 'application/mspowerpoint', 'ppz' => 'application/mspowerpoint', 'pre' => 'application/x-freelance',
                                'prt' => 'application/pro_eng', 'ps' => 'application/postscript', 'roff' => 'application/x-troff',
                                'scm' => 'application/x-lotusscreencam', 'set' => 'application/set', 'sh' => 'application/x-sh',
                                'shar' => 'application/x-shar', 'sit' => 'application/x-stuffit', 'skd' => 'application/x-koan',
                                'skm' => 'application/x-koan', 'skp' => 'application/x-koan', 'skt' => 'application/x-koan',
                                'smi' => 'application/smil', 'smil' => 'application/smil', 'sol' => 'application/solids',
                                'spl' => 'application/x-futuresplash', 'src' => 'application/x-wais-source', 'step' => 'application/STEP',
                                'stl' => 'application/SLA', 'stp' => 'application/STEP', 'sv4cpio' => 'application/x-sv4cpio',
                                'sv4crc' => 'application/x-sv4crc', 'svg' => 'image/svg+xml', 'svgz' => 'image/svg+xml',
                                'swf' => 'application/x-shockwave-flash', 't' => 'application/x-troff',
                                'tar' => 'application/x-tar', 'tcl' => 'application/x-tcl', 'tex' => 'application/x-tex',
                                'texi' => 'application/x-texinfo', 'texinfo' => 'application/x-texinfo', 'tr' => 'application/x-troff',
                                'tsp' => 'application/dsptype', 'unv' => 'application/i-deas', 'ustar' => 'application/x-ustar',
                                'vcd' => 'application/x-cdlink', 'vda' => 'application/vda', 'xlc' => 'application/vnd.ms-excel',
                                'xll' => 'application/vnd.ms-excel', 'xlm' => 'application/vnd.ms-excel', 'xls' => 'application/vnd.ms-excel',
                                'xlw' => 'application/vnd.ms-excel', 'zip' => 'application/zip', 'aif' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff',
                                'aiff' => 'audio/x-aiff', 'au' => 'audio/basic', 'kar' => 'audio/midi', 'mid' => 'audio/midi',
                                'midi' => 'audio/midi', 'mp2' => 'audio/mpeg', 'mp3' => 'audio/mpeg', 'mpga' => 'audio/mpeg',
                                'ra' => 'audio/x-realaudio', 'ram' => 'audio/x-pn-realaudio', 'rm' => 'audio/x-pn-realaudio',
                                'rpm' => 'audio/x-pn-realaudio-plugin', 'snd' => 'audio/basic', 'tsi' => 'audio/TSP-audio', 'wav' => 'audio/x-wav',
                                'asc' => 'text/plain', 'c' => 'text/plain', 'cc' => 'text/plain', 'css' => 'text/css', 'etx' => 'text/x-setext',
                                'f' => 'text/plain', 'f90' => 'text/plain', 'h' => 'text/plain', 'hh' => 'text/plain', 'htm' => 'text/html',
                                'html' => 'text/html', 'm' => 'text/plain', 'rtf' => 'text/rtf', 'rtx' => 'text/richtext', 'sgm' => 'text/sgml',
                                'sgml' => 'text/sgml', 'tsv' => 'text/tab-separated-values', 'tpl' => 'text/template', 'txt' => 'text/plain',
                                'xml' => 'text/xml', 'avi' => 'video/x-msvideo', 'fli' => 'video/x-fli', 'mov' => 'video/quicktime',
                                'movie' => 'video/x-sgi-movie', 'mpe' => 'video/mpeg', 'mpeg' => 'video/mpeg', 'mpg' => 'video/mpeg',
                                'qt' => 'video/quicktime', 'viv' => 'video/vnd.vivo', 'vivo' => 'video/vnd.vivo', 'gif' => 'image/gif',
                                'ief' => 'image/ief', 'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg',
                                'pbm' => 'image/x-portable-bitmap', 'pgm' => 'image/x-portable-graymap', 'png' => 'image/png',
                                'pnm' => 'image/x-portable-anymap', 'ppm' => 'image/x-portable-pixmap', 'ras' => 'image/cmu-raster',
                                'rgb' => 'image/x-rgb', 'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'xbm' => 'image/x-xbitmap',
                                'xpm' => 'image/x-xpixmap', 'xwd' => 'image/x-xwindowdump', 'ice' => 'x-conference/x-cooltalk',
                                'iges' => 'model/iges', 'igs' => 'model/iges', 'mesh' => 'model/mesh', 'msh' => 'model/mesh',
                                'silo' => 'model/mesh', 'vrml' => 'model/vrml', 'wrl' => 'model/vrml',
                                'mime' => 'www/mime', 'pdb' => 'chemical/x-pdb', 'xyz' => 'chemical/x-pdb');
/**
 * Holds headers sent to browser before rendering media
 *
 * @var array
 * @access protected
 */
    var $_headers = array();
/**
 * Constructor
 *
 * @param object $controller
 */
    function __construct(&$controller) {
        parent::__construct($controller);
    }
/**
 * Display or download the given file
 *
 * @return unknown
 */
    function render() {
        $name = $download = $extension = $id = $modified = $path = $size = $cache = $mimeType = null;
        extract($this->viewVars, EXTR_OVERWRITE);

        if ($size) {
            $id = $id . '_' . $size;
        }

        if (is_dir($path)) {
            $path = $path . $id;
        } else {
            $path = APP . $path . $id;
        }

        if (!file_exists($path)) {
            header('Content-Type: text/html');
            $this->cakeError('error404');
        }

        if (is_null($name)) {
            $name = $id;
        }

        if (is_array($mimeType)) {
            $this->mimeType = array_merge($this->mimeType, $mimeType);
        }

        if (isset($extension) && isset($this->mimeType[$extension]) && connection_status() == 0) {
            $chunkSize = 8192;
            $buffer = '';
            $fileSize = @filesize($path);
            $handle = fopen($path, 'rb');

            if ($handle === false) {
                return false;
            }
            if (!empty($modified)) {
                $modified = gmdate('D, d M Y H:i:s', strtotime($modified, time())) . ' GMT';
            } else {
                $modified = gmdate('D, d M Y H:i:s') . ' GMT';
            }

            if ($download) {
                $contentTypes = array('application/octet-stream');
                $agent = env('HTTP_USER_AGENT');

                if (preg_match('%Opera(/| )([0-9].[0-9]{1,2})%', $agent)) {
                    $contentTypes[0] = 'application/octetstream';
                } else if (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $agent)) {
                    $contentTypes[0] = 'application/force-download';
                    array_push($contentTypes, array(
                        'application/octet-stream',
                        'application/download'
                    ));
                }
                foreach($contentTypes as $contentType) {
                    $this->_header('Content-Type: ' . $contentType);
                }
                $this->_header(array(
                    'Content-Disposition: attachment; filename="' . $name . '.' . $extension . '";',
                    'Expires: 0',
                    'Accept-Ranges: bytes',
                    'Cache-Control: private' => false,
                    'Pragma: private'));

                $httpRange = env('HTTP_RANGE');
                if (isset($httpRange)) {
                    list($toss, $range) = explode('=', $httpRange);

                    $size = $fileSize - 1;
                    $length = $fileSize - $range;

                    $this->_header(array(
                        'HTTP/1.1 206 Partial Content',
                        'Content-Length: ' . $length,
                        'Content-Range: bytes ' . $range . $size . '/' . $fileSize));

                    fseek($handle, $range);
                } else {
                    $this->_header('Content-Length: ' . $fileSize);
                }
            } else {
                $this->_header('Date: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
                if ($cache) {
                    if (!is_numeric($cache)) {
                        $cache = strtotime($cache) - time();
                    }
                    $this->_header(array(
                        'Cache-Control: max-age=' . $cache,
                        'Expires: ' . gmdate('D, d M Y H:i:s', time() + $cache) . ' GMT',
                        'Pragma: cache'));
                } else {
                    $this->_header(array(
                        'Cache-Control: must-revalidate, post-check=0, pre-check=0',
                        'Pragma: no-cache'));
                }
                $this->_header(array(
                    'Last-Modified: ' . $modified,
                    'Content-Type: ' . $this->mimeType[$extension],
                    'Content-Length: ' . $fileSize));
            }
            $this->_output();
            @ob_end_clean();

            while (!feof($handle) && connection_status() == 0 && !connection_aborted()) {
                set_time_limit(0);
                $buffer = fread($handle, $chunkSize);
                echo $buffer;
                @flush();
                @ob_flush();
            }
            fclose($handle);
            exit(0);
        }
        return false;
    }
/**
 * Method to set headers
 * @param mixed $header
 * @param boolean $boolean
 * @access protected
 */
    function _header($header, $boolean = true) {
        if (is_array($header)) {
            foreach ($header as $string => $boolean) {
                if (is_numeric($string)) {
                    $this->_headers[] = array($boolean => true);
                } else {
                    $this->_headers[] = array($string => $boolean);
                }
            }
            return;
        }
        $this->_headers[] = array($header => $boolean);
        return;
    }
/**
 * Method to output headers
 * @access protected
 */
    function _output() {
        foreach ($this->_headers as $key => $value) {
            $header = key($value);
            header($header, $value[$header]);
        }
    }
}
?>

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