Mode Analytics Easier Url Signature Function

mode_analytics_url.py

import md5
import hmac
import base64
import hashlib
import time

def sign_url(url, key, secret):
  request_type = 'GET'
  content_type = ''
  content_body = ''
  content_hash = md5.new(content_body).digest()
  content_digest = base64.encodestring(content_hash).strip()
  epoch = str(int(time.time()))
  url = '%s&timestamp=%s' % (url, epoch)
  request_string = ','.join([request_type, content_type, content_digest, url, epoch])
  signature = hmac.new(secret, msg=request_string, digestmod=hashlib.sha256).hexdigest()
  signed_url = '%s&signature=%s' % (url, signature)
  return signed_url