1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Application\Responses;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * File download response.
 15:  */
 16: class FileResponse implements Nette\Application\IResponse
 17: {
 18:     use Nette\SmartObject;
 19: 
 20:     /** @var bool */
 21:     public $resuming = true;
 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:     private $forceDownload;
 34: 
 35: 
 36:     /**
 37:      * @param  string  file path
 38:      * @param  string  imposed file name
 39:      * @param  string  MIME content type
 40:      */
 41:     public function __construct($file, $name = null, $contentType = null, $forceDownload = true)
 42:     {
 43:         if (!is_file($file)) {
 44:             throw new Nette\Application\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:         $this->forceDownload = $forceDownload;
 51:     }
 52: 
 53: 
 54:     /**
 55:      * Returns the path to a downloaded file.
 56:      * @return string
 57:      */
 58:     public function getFile()
 59:     {
 60:         return $this->file;
 61:     }
 62: 
 63: 
 64:     /**
 65:      * Returns the file name.
 66:      * @return string
 67:      */
 68:     public function getName()
 69:     {
 70:         return $this->name;
 71:     }
 72: 
 73: 
 74:     /**
 75:      * Returns the MIME content type of a downloaded file.
 76:      * @return string
 77:      */
 78:     public function getContentType()
 79:     {
 80:         return $this->contentType;
 81:     }
 82: 
 83: 
 84:     /**
 85:      * Sends response to output.
 86:      * @return void
 87:      */
 88:     public function send(Nette\Http\IRequest $httpRequest, Nette\Http\IResponse $httpResponse)
 89:     {
 90:         $httpResponse->setContentType($this->contentType);
 91:         $httpResponse->setHeader('Content-Disposition',
 92:             ($this->forceDownload ? 'attachment' : 'inline')
 93:                 . '; filename="' . $this->name . '"'
 94:                 . '; filename*=utf-8\'\'' . rawurlencode($this->name));
 95: 
 96:         $filesize = $length = filesize($this->file);
 97:         $handle = fopen($this->file, 'r');
 98: 
 99:         if ($this->resuming) {
100:             $httpResponse->setHeader('Accept-Ranges', 'bytes');
101:             if (preg_match('#^bytes=(\d*)-(\d*)\z#', $httpRequest->getHeader('Range'), $matches)) {
102:                 list(, $start, $end) = $matches;
103:                 if ($start === '') {
104:                     $start = max(0, $filesize - $end);
105:                     $end = $filesize - 1;
106: 
107:                 } elseif ($end === '' || $end > $filesize - 1) {
108:                     $end = $filesize - 1;
109:                 }
110:                 if ($end < $start) {
111:                     $httpResponse->setCode(416); // requested range not satisfiable
112:                     return;
113:                 }
114: 
115:                 $httpResponse->setCode(206);
116:                 $httpResponse->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $filesize);
117:                 $length = $end - $start + 1;
118:                 fseek($handle, $start);
119: 
120:             } else {
121:                 $httpResponse->setHeader('Content-Range', 'bytes 0-' . ($filesize - 1) . '/' . $filesize);
122:             }
123:         }
124: 
125:         $httpResponse->setHeader('Content-Length', $length);
126:         while (!feof($handle) && $length > 0) {
127:             echo $s = fread($handle, min(4000000, $length));
128:             $length -= strlen($s);
129:         }
130:         fclose($handle);
131:     }
132: }
133: