def _default_content_type_rewriter(state):
  if not 'Content-Type' in state.headers:
    state.headers['Content-Type'] = 'text/html'
Set the default Content-Type header.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/devappserver2/request_rewriter.py/_default_content_type_rewriter