title: pdf.js : read file from another server
body: <p>I use this pdf.js <a href="https://github.com/mozilla/pdf.js/" rel="nofollow">https://github.com/mozilla/pdf.js/</a>  library to render pdf files on my own site .. 
  everything work fine but when I try to read files from my amazon s3 did not work ?</p>
  
  <p>if I put the pdf file in my server it works fine (assets/books/my.pdf)
  but if I put it on another server did not.
  for example my file on amazon s3 : 
  s3.amazonaws.com/MYBUCKET/MYBOOK.pdf</p>
  
  <p>any ideas ? 
  thanks .. </p>