title: fileReader.readAsArrayBuffer() equivalent method in Node.js?
body: <p>I have a <a href="https://developer.mozilla.org/en-US/docs/Web/API/File" rel="nofollow noreferrer">File</a> object and I want to pass it to <a href="http://mozilla.github.io/pdf.js" rel="nofollow noreferrer">PDF.js</a>'s <code>getDocument</code> method. On the frontend I would use the <code>getDocument</code> method like so:</p>
  <pre><code>pdfjs.getDocument(fileReader.readAsArrayBuffer(myFileHere))
  </code></pre>
  <p>How can I implement the above with <a href="http://www.nodejs.org" rel="nofollow noreferrer">Node.js</a>? I am also using <a href="http://expressjs.com" rel="nofollow noreferrer">Express.js</a> and <a href="http://github.com/expressjs/multer" rel="nofollow noreferrer">Multer</a>.</p>