title: Android is sending 2 requests to download one file via mobile browser
body: <p>That is really happening. I made test in PHP to confirm this.</p>
  
  <p>I created a test.php file and put:</p>
  
  <pre><code>&lt;?php
      error_log('Downloading...');
      header('Content-type: application/force-download');
      header('Content-Disposition: attachment; filename="test.txt"');
      echo 'test android download';
  ?&gt;
  </code></pre>
  
  <p>So, when I open www.myurl/test.php via any Android mobile browser, in the error_log.log I get "Downloading..." two times.</p>
  
  <p>When i open same URL in any other Mobile OS(Windows, IOS, etc.) I get only one time "Downloading..." in error_log.log file.</p>
  
  <p>Does anyone know what's going on and how to avoid this ??</p>
  
  <p>This is a big problem for me, because I perform user charging when somebody download a file. And now from Android Phones there are 2 charges for 1 downloaded file.</p>