1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  * @package Nette\Application\Responses
  7:  */
  8: 
  9: 
 10: 
 11: /**
 12:  * File download response.
 13:  *
 14:  * @author     David Grudl
 15:  *
 16:  * @property-read string $file
 17:  * @property-read string $name
 18:  * @property-read string $contentType
 19:  * @package Nette\Application\Responses
 20:  */
 21: class FileResponse extends Object implements IPresenterResponse
 22: {
 23:     /** @var string */
 24:     private $file;
 25: 
 26:     /** @var string */
 27:     private $contentType;
 28: 
 29:     /** @var string */
 30:     private $name;
 31: 
 32:     /** @var bool */
 33:     public $resuming = TRUE;
 34: 
 35: 
 36:     /**
 37:      * @param  string  file path
 38:      * @param  string  imposed file name
 39:      * @param  string  MIME content type
 40:      */
 41:     public function __construct($file, $name = NULL, $contentType = NULL)
 42:     {
 43:         if (!is_file($file)) {
 44:             throw new BadRequestException("File '$file' doesn't exist.");
 45:         }
 46: 
 47:         $this->file = $file;
 48:         $this->name = $name ? $name : basename($file);
 49:         $this->contentType = $contentType ? $contentType : 'application/octet-stream';
 50:     }
 51: 
 52: 
 53:     /**
 54:      * Returns the path to a downloaded file.
 55:      * @return string
 56:      */
 57:     public function getFile()
 58:     {
 59:         return $this->file;
 60:     }
 61: 
 62: 
 63:     /**
 64:      * Returns the file name.
 65:      * @return string
 66:      */
 67:     public function getName()
 68:     {
 69:         return $this->name;
 70:     }
 71: 
 72: 
 73:     /**
 74:      * Returns the MIME content type of a downloaded file.
 75:      * @return string
 76:      */
 77:     public function getContentType()
 78:     {
 79:         return $this->contentType;
 80:     }
 81: 
 82: 
 83:     /**
 84:      * Sends response to output.
 85:      * @return void
 86:      */
 87:     public function send(IHttpRequest $httpRequest, IHttpResponse $httpResponse)
 88:     {
 89:         $httpResponse->setContentType($this->contentType);
 90:         $httpResponse->setHeader('Content-Disposition', 'attachment; filename="' . $this->name . '"');
 91: 
 92:         $filesize = $length = filesize($this->file);
 93:         $handle = fopen($this->file, 'r');
 94: 
 95:         if ($this->resuming) {
 96:             $httpResponse->setHeader('Accept-Ranges', 'bytes');
 97:             if (preg_match('#^bytes=(\d*)-(\d*)\z#', $httpRequest->getHeader('Range'), $matches)) {
 98:                 list(, $start, $end) = $matches;
 99:                 if ($start === '') {
100:                     $start = max(0, $filesize - $end);
101:                     $end = $filesize - 1;
102: 
103:                 } elseif ($end === '' || $end > $filesize - 1) {
104:                     $end = $filesize - 1;
105:                 }
106:                 if ($end < $start) {
107:                     $httpResponse->setCode(416); // requested range not satisfiable
108:                     return;
109:                 }
110: 
111:                 $httpResponse->setCode(206);
112:                 $httpResponse->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $filesize);
113:                 $length = $end - $start + 1;
114:                 fseek($handle, $start);
115: 
116:             } else {
117:                 $httpResponse->setHeader('Content-Range', 'bytes 0-' . ($filesize - 1) . '/' . $filesize);
118:             }
119:         }
120: 
121:         $httpResponse->setHeader('Content-Length', $length);
122:         while (!feof($handle) && $length > 0) {
123:             echo $s = fread($handle, min(4e6, $length));
124:             $length -= strlen($s);
125:         }
126:         fclose($handle);
127:     }
128: 
129: }
130: