iHiD

# A simple function to return a signed, expiring url for Amazon Cloudfront. 
# As it's relatively difficult to figure out exactly what is required, I've posted my working code here.

# This will require openssl, digest/sha1, base64 and maybe other libraries. 
# In my rails app, all of these are already loaded so I'm not sure of the exact dependencies.

module CloudFront
  def get_signed_expiring_url(path, expires_in, private_key_filename, key_pair_id)

    # AWS works on UTC, so make sure you are not using local time