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:  * @author     David Grudl
 17:  *
 18:  * @property-read string $file
 19:  * @property-read string $name
 20:  * @property-read string $contentType
 21:  */
 22: class FileResponse extends Nette\Object implements Nette\Application\IResponse
 23: {
 24:     /** @var string */
 25:     private $file;
 26: 
 27:     /** @var string */
 28:     private $contentType;
 29: 
 30:     /** @var string */
 31:     private $name;
 32: 
 33:     /** @var bool */
 34:     public $resuming = TRUE;
 35: 
 36: 
 37:     /**
 38:      * @param  string  file path
 39:      * @param  string  imposed file name
 40:      * @param  string  MIME content type
 41:      */
 42:     public function __construct($file, $name = NULL, $contentType = NULL)
 43:     {
 44:         if (!is_file($file)) {
 45:             throw new Nette\Application\BadRequestException("File '$file' doesn't exist.");
 46:         }
 47: 
 48:         $this->file = $file;
 49:         $this->name = $name ? $name : basename($file);
 50:         $this->contentType = $contentType ? $contentType : 'application/octet-stream';
 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', 'attachment; 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: