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 extends Nette\Object implements Nette\Application\IResponse
 17: {
 18:     /** @var string */
 19:     private $file;
 20: 
 21:     /** @var string */
 22:     private $contentType;
 23: 
 24:     /** @var string */
 25:     private $name;
 26: 
 27:     /** @var bool */
 28:     public $resuming = TRUE;
 29: 
 30:     /** @var bool */
 31:     private $forceDownload;
 32: 
 33: 
 34:     /**
 35:      * @param  string  file path
 36:      * @param  string  imposed file name
 37:      * @param  string  MIME content type
 38:      */
 39:     public function __construct($file, $name = NULL, $contentType = NULL, $forceDownload = TRUE)
 40:     {
 41:         if (!is_file($file)) {
 42:             throw new Nette\Application\BadRequestException("File '$file' doesn't exist.");
 43:         }
 44: 
 45:         $this->file = $file;
 46:         $this->name = $name ? $name : basename($file);
 47:         $this->contentType = $contentType ? $contentType : 'application/octet-stream';
 48:         $this->forceDownload = $forceDownload;
 49:     }
 50: 
 51: 
 52:     /**
 53:      * Returns the path to a downloaded file.
 54:      * @return string
 55:      */
 56:     public function getFile()
 57:     {
 58:         return $this->file;
 59:     }
 60: 
 61: 
 62:     /**
 63:      * Returns the file name.
 64:      * @return string
 65:      */
 66:     public function getName()
 67:     {
 68:         return $this->name;
 69:     }
 70: 
 71: 
 72:     /**
 73:      * Returns the MIME content type of a downloaded file.
 74:      * @return string
 75:      */
 76:     public function getContentType()
 77:     {
 78:         return $this->contentType;
 79:     }
 80: 
 81: 
 82:     /**
 83:      * Sends response to output.
 84:      * @return void
 85:      */
 86:     public function send(Nette\Http\IRequest $httpRequest, Nette\Http\IResponse $httpResponse)
 87:     {
 88:         $httpResponse->setContentType($this->contentType);
 89:         $httpResponse->setHeader('Content-Disposition',
 90:             ($this->forceDownload ? 'attachment' : 'inline')
 91:                 . '; filename="' . $this->name . '"'
 92:                 . '; filename*=utf-8\'\'' . rawurlencode($this->name));
 93: 
 94:         $filesize = $length = filesize($this->file);
 95:         $handle = fopen($this->file, 'r');
 96: 
 97:         if ($this->resuming) {
 98:             $httpResponse->setHeader('Accept-Ranges', 'bytes');
 99:             if (preg_match('#^bytes=(\d*)-(\d*)\z#', $httpRequest->getHeader('Range'), $matches)) {
100:                 list(, $start, $end) = $matches;
101:                 if ($start === '') {
102:                     $start = max(0, $filesize - $end);
103:                     $end = $filesize - 1;
104: 
105:                 } elseif ($end === '' || $end > $filesize - 1) {
106:                     $end = $filesize - 1;
107:                 }
108:                 if ($end < $start) {
109:                     $httpResponse->setCode(416); // requested range not satisfiable
110:                     return;
111:                 }
112: 
113:                 $httpResponse->setCode(206);
114:                 $httpResponse->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $filesize);
115:                 $length = $end - $start + 1;
116:                 fseek($handle, $start);
117: 
118:             } else {
119:                 $httpResponse->setHeader('Content-Range', 'bytes 0-' . ($filesize - 1) . '/' . $filesize);
120:             }
121:         }
122: 
123:         $httpResponse->setHeader('Content-Length', $length);
124:         while (!feof($handle) && $length > 0) {
125:             echo $s = fread($handle, min(4e6, $length));
126:             $length -= strlen($s);
127:         }
128:         fclose($handle);
129:     }
130: 
131: }
132: