title: How to view office files into web page like google drive
body: <p>My project is based on Node.js (backed end) and AngularJs (front end), so I want to open Office files (.doc .ppt and so on) into my web page. My files are stored into Amazon s3 server. I want to to open these files into my web page.</p>
  
  <p>So I need similar kind of functionality like google drive have for viewing the files.</p>
  
  <p>Any Idea?</p>