1: <?php
  2: /**
  3:  * Methods to display or download any type of file
  4:  *
  5:  * PHP versions 4 and 5
  6:  *
  7:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  8:  * Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
  9:  *
 10:  * Licensed under The MIT License
 11:  * Redistributions of files must retain the above copyright notice.
 12:  *
 13:  * @copyright     Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
 14:  * @link          http://cakephp.org CakePHP(tm) Project
 15:  * @package       cake
 16:  * @subpackage    cake.cake.libs.view
 17:  * @since         CakePHP(tm) v 1.2.0.5714
 18:  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 19:  */
 20: App::import('View', 'View', false);
 21: 
 22: class MediaView extends View {
 23: 
 24: /**
 25:  * Holds known mime type mappings
 26:  *
 27:  * @var array
 28:  * @access public
 29:  */
 30:     var $mimeType = array(
 31:         'ai' => 'application/postscript', 'bcpio' => 'application/x-bcpio', 'bin' => 'application/octet-stream',
 32:         'ccad' => 'application/clariscad', 'cdf' => 'application/x-netcdf', 'class' => 'application/octet-stream',
 33:         'cpio' => 'application/x-cpio', 'cpt' => 'application/mac-compactpro', 'csh' => 'application/x-csh',
 34:         'csv' => 'application/csv', 'dcr' => 'application/x-director', 'dir' => 'application/x-director',
 35:         'dms' => 'application/octet-stream', 'doc' => 'application/msword', 'drw' => 'application/drafting',
 36:         'dvi' => 'application/x-dvi', 'dwg' => 'application/acad', 'dxf' => 'application/dxf',
 37:         'dxr' => 'application/x-director', 'eot' => 'application/vnd.ms-fontobject', 'eps' => 'application/postscript',
 38:         'exe' => 'application/octet-stream', 'ez' => 'application/andrew-inset',
 39:         'flv' => 'video/x-flv', 'gtar' => 'application/x-gtar', 'gz' => 'application/x-gzip',
 40:         'bz2' => 'application/x-bzip', '7z' => 'application/x-7z-compressed', 'hdf' => 'application/x-hdf',
 41:         'hqx' => 'application/mac-binhex40', 'ico' => 'image/vnd.microsoft.icon', 'ips' => 'application/x-ipscript',
 42:         'ipx' => 'application/x-ipix', 'js' => 'application/x-javascript', 'latex' => 'application/x-latex',
 43:         'lha' => 'application/octet-stream', 'lsp' => 'application/x-lisp', 'lzh' => 'application/octet-stream',
 44:         'man' => 'application/x-troff-man', 'me' => 'application/x-troff-me', 'mif' => 'application/vnd.mif',
 45:         'ms' => 'application/x-troff-ms', 'nc' => 'application/x-netcdf', 'oda' => 'application/oda',
 46:         'otf' => 'font/otf', 'pdf' => 'application/pdf',
 47:         'pgn' => 'application/x-chess-pgn', 'pot' => 'application/mspowerpoint', 'pps' => 'application/mspowerpoint',
 48:         'ppt' => 'application/mspowerpoint', 'ppz' => 'application/mspowerpoint', 'pre' => 'application/x-freelance',
 49:         'prt' => 'application/pro_eng', 'ps' => 'application/postscript', 'roff' => 'application/x-troff',
 50:         'scm' => 'application/x-lotusscreencam', 'set' => 'application/set', 'sh' => 'application/x-sh',
 51:         'shar' => 'application/x-shar', 'sit' => 'application/x-stuffit', 'skd' => 'application/x-koan',
 52:         'skm' => 'application/x-koan', 'skp' => 'application/x-koan', 'skt' => 'application/x-koan',
 53:         'smi' => 'application/smil', 'smil' => 'application/smil', 'sol' => 'application/solids',
 54:         'spl' => 'application/x-futuresplash', 'src' => 'application/x-wais-source', 'step' => 'application/STEP',
 55:         'stl' => 'application/SLA', 'stp' => 'application/STEP', 'sv4cpio' => 'application/x-sv4cpio',
 56:         'sv4crc' => 'application/x-sv4crc', 'svg' => 'image/svg+xml', 'svgz' => 'image/svg+xml',
 57:         'swf' => 'application/x-shockwave-flash', 't' => 'application/x-troff',
 58:         'tar' => 'application/x-tar', 'tcl' => 'application/x-tcl', 'tex' => 'application/x-tex',
 59:         'texi' => 'application/x-texinfo', 'texinfo' => 'application/x-texinfo', 'tr' => 'application/x-troff',
 60:         'tsp' => 'application/dsptype', 'ttf' => 'font/ttf',
 61:         'unv' => 'application/i-deas', 'ustar' => 'application/x-ustar',
 62:         'vcd' => 'application/x-cdlink', 'vda' => 'application/vda', 'xlc' => 'application/vnd.ms-excel',
 63:         'xll' => 'application/vnd.ms-excel', 'xlm' => 'application/vnd.ms-excel', 'xls' => 'application/vnd.ms-excel',
 64:         'xlw' => 'application/vnd.ms-excel', 'zip' => 'application/zip', 'aif' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff',
 65:         'aiff' => 'audio/x-aiff', 'au' => 'audio/basic', 'kar' => 'audio/midi', 'mid' => 'audio/midi',
 66:         'midi' => 'audio/midi', 'mp2' => 'audio/mpeg', 'mp3' => 'audio/mpeg', 'mpga' => 'audio/mpeg',
 67:         'ra' => 'audio/x-realaudio', 'ram' => 'audio/x-pn-realaudio', 'rm' => 'audio/x-pn-realaudio',
 68:         'rpm' => 'audio/x-pn-realaudio-plugin', 'snd' => 'audio/basic', 'tsi' => 'audio/TSP-audio', 'wav' => 'audio/x-wav',
 69:         'asc' => 'text/plain', 'c' => 'text/plain', 'cc' => 'text/plain', 'css' => 'text/css', 'etx' => 'text/x-setext',
 70:         'f' => 'text/plain', 'f90' => 'text/plain', 'h' => 'text/plain', 'hh' => 'text/plain', 'htm' => 'text/html',
 71:         'html' => 'text/html', 'm' => 'text/plain', 'rtf' => 'text/rtf', 'rtx' => 'text/richtext', 'sgm' => 'text/sgml',
 72:         'sgml' => 'text/sgml', 'tsv' => 'text/tab-separated-values', 'tpl' => 'text/template', 'txt' => 'text/plain',
 73:         'xml' => 'text/xml', 'avi' => 'video/x-msvideo', 'fli' => 'video/x-fli', 'mov' => 'video/quicktime',
 74:         'movie' => 'video/x-sgi-movie', 'mpe' => 'video/mpeg', 'mpeg' => 'video/mpeg', 'mpg' => 'video/mpeg',
 75:         'qt' => 'video/quicktime', 'viv' => 'video/vnd.vivo', 'vivo' => 'video/vnd.vivo', 'gif' => 'image/gif',
 76:         'ief' => 'image/ief', 'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg',
 77:         'pbm' => 'image/x-portable-bitmap', 'pgm' => 'image/x-portable-graymap', 'png' => 'image/png',
 78:         'pnm' => 'image/x-portable-anymap', 'ppm' => 'image/x-portable-pixmap', 'ras' => 'image/cmu-raster',
 79:         'rgb' => 'image/x-rgb', 'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'xbm' => 'image/x-xbitmap',
 80:         'xpm' => 'image/x-xpixmap', 'xwd' => 'image/x-xwindowdump', 'ice' => 'x-conference/x-cooltalk',
 81:         'iges' => 'model/iges', 'igs' => 'model/iges', 'mesh' => 'model/mesh', 'msh' => 'model/mesh',
 82:         'silo' => 'model/mesh', 'vrml' => 'model/vrml', 'wrl' => 'model/vrml',
 83:         'mime' => 'www/mime', 'pdb' => 'chemical/x-pdb', 'xyz' => 'chemical/x-pdb');
 84: 
 85: /**
 86:  * Holds headers sent to browser before rendering media
 87:  *
 88:  * @var array
 89:  * @access protected
 90:  */
 91:     var $_headers = array();
 92: 
 93: /**
 94:  * Constructor
 95:  *
 96:  * @param object $controller
 97:  */
 98:     function __construct(&$controller) {
 99:         parent::__construct($controller);
100:     }
101: 
102: /**
103:  * Display or download the given file
104:  *
105:  * @return unknown
106:  */
107:     function render() {
108:         $name = $download = $extension = $id = $modified = $path = $size = $cache = $mimeType = null;
109:         extract($this->viewVars, EXTR_OVERWRITE);
110: 
111:         if ($size) {
112:             $id = $id . '_' . $size;
113:         }
114: 
115:         if (is_dir($path)) {
116:             $path = $path . $id;
117:         } else {
118:             $path = APP . $path . $id;
119:         }
120: 
121:         if (!file_exists($path)) {
122:             header('Content-Type: text/html');
123:             $this->cakeError('error404');
124:         }
125: 
126:         if (is_null($name)) {
127:             $name = $id;
128:         }
129: 
130:         if (is_array($mimeType)) {
131:             $this->mimeType = array_merge($this->mimeType, $mimeType);
132:         }
133: 
134:         if (isset($extension) && isset($this->mimeType[strtolower($extension)]) && connection_status() == 0) {
135:             $chunkSize = 8192;
136:             $buffer = '';
137:             $fileSize = @filesize($path);
138:             $handle = fopen($path, 'rb');
139: 
140:             if ($handle === false) {
141:                 return false;
142:             }
143:             if (!empty($modified)) {
144:                 $modified = gmdate('D, d M Y H:i:s', strtotime($modified, time())) . ' GMT';
145:             } else {
146:                 $modified = gmdate('D, d M Y H:i:s') . ' GMT';
147:             }
148: 
149:             if ($download) {
150:                 $contentTypes = array('application/octet-stream');
151:                 $agent = env('HTTP_USER_AGENT');
152: 
153:                 if (preg_match('%Opera(/| )([0-9].[0-9]{1,2})%', $agent)) {
154:                     $contentTypes[0] = 'application/octetstream';
155:                 } else if (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $agent)) {
156:                     $contentTypes[0] = 'application/force-download';
157:                     array_merge($contentTypes, array(
158:                         'application/octet-stream',
159:                         'application/download'
160:                     ));
161:                 }
162:                 foreach($contentTypes as $contentType) {
163:                     $this->_header('Content-Type: ' . $contentType);
164:                 }
165:                 $this->_header(array(
166:                     'Content-Disposition: attachment; filename="' . $name . '.' . $extension . '";',
167:                     'Expires: 0',
168:                     'Accept-Ranges: bytes',
169:                     'Cache-Control: private' => false,
170:                     'Pragma: private'));
171: 
172:                 $httpRange = env('HTTP_RANGE');
173:                 if (isset($httpRange)) {
174:                     list($toss, $range) = explode('=', $httpRange);
175: 
176:                     $size = $fileSize - 1;
177:                     $length = $fileSize - $range;
178: 
179:                     $this->_header(array(
180:                         'HTTP/1.1 206 Partial Content',
181:                         'Content-Length: ' . $length,
182:                         'Content-Range: bytes ' . $range . $size . '/' . $fileSize));
183: 
184:                     fseek($handle, $range);
185:                 } else {
186:                     $this->_header('Content-Length: ' . $fileSize);
187:                 }
188:             } else {
189:                 $this->_header('Date: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
190:                 if ($cache) {
191:                     if (!is_numeric($cache)) {
192:                         $cache = strtotime($cache) - time();
193:                     }
194:                     $this->_header(array(
195:                         'Cache-Control: max-age=' . $cache,
196:                         'Expires: ' . gmdate('D, d M Y H:i:s', time() + $cache) . ' GMT',
197:                         'Pragma: cache'));
198:                 } else {
199:                     $this->_header(array(
200:                         'Cache-Control: must-revalidate, post-check=0, pre-check=0',
201:                         'Pragma: no-cache'));
202:                 }
203:                 $this->_header(array(
204:                     'Last-Modified: ' . $modified,
205:                     'Content-Type: ' . $this->mimeType[strtolower($extension)],
206:                     'Content-Length: ' . $fileSize));
207:             }
208:             $this->_output();
209:             $this->_clearBuffer();
210: 
211:             while (!feof($handle)) {
212:                 if (!$this->_isActive()) {
213:                     fclose($handle);
214:                     return false;
215:                 }
216:                 set_time_limit(0);
217:                 $buffer = fread($handle, $chunkSize);
218:                 echo $buffer;
219:                 $this->_flushBuffer();
220:             }
221:             fclose($handle);
222:             return;
223:         }
224:         return false;
225:     }
226: 
227: /**
228:  * Method to set headers
229:  * @param mixed $header
230:  * @param boolean $boolean
231:  * @access protected
232:  */
233:     function _header($header, $boolean = true) {
234:         if (is_array($header)) {
235:             foreach ($header as $string => $boolean) {
236:                 if (is_numeric($string)) {
237:                     $this->_headers[] = array($boolean => true);
238:                 } else {
239:                     $this->_headers[] = array($string => $boolean);
240:                 }
241:             }
242:             return;
243:         }
244:         $this->_headers[] = array($header => $boolean);
245:         return;
246:     }
247: 
248: /**
249:  * Method to output headers
250:  * @access protected
251:  */
252:     function _output() {
253:         foreach ($this->_headers as $key => $value) {
254:             $header = key($value);
255:             header($header, $value[$header]);
256:         }
257:     }
258: 
259: /**
260:  * Returns true if connection is still active
261:  * @return boolean
262:  * @access protected
263:  */
264:     function _isActive() {
265:         return connection_status() == 0 && !connection_aborted();
266:     }
267: 
268: /**
269:  * Clears the contents of the topmost output buffer and discards them
270:  * @return boolean
271:  * @access protected
272:  */
273:     function _clearBuffer() {
274:         return @ob_end_clean();
275:     }
276: 
277: /**
278:  * Flushes the contents of the output buffer
279:  * @access protected
280:  */
281:     function _flushBuffer() {
282:         @flush();
283:         @ob_flush();
284:     }
285: }
286: