@staticmethod
  def CreateEtag(data):
    data_crc = zlib.crc32(data)
    return base64.b64encode(str(data_crc))
Returns string of hash of file content, unique per URL.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver.py/FileDispatcher.CreateEtag