title: Is it possible to download$.post via FileSaver saveAs
body: <p>I'm testing FileSaver saveAs function. Here's my code to fetch report data with post request</p>
  
  <pre><code>$.ajax({
      type: "POST",
      url: '/rest/report/test',
      contentType: 'application/json',
      async: false,
      data: JSON.stringify({"date": "11.11.2015"}),
      success: function (response) {
          console.log(response);
          saveAs(response,"test.xlsx");
      }
  });
  </code></pre>
  
  <p>That fails with error: Uncaught TypeError: Failed to execute 'createObjectURL' on 'URL': No function was found that matched the signature provided.</p>
  
  <p>But I can see result console.log(response); - it shows file content. Is it possible to make my code to download file?</p>