The app.yaml routing allows "fall-through" routing, where your application's handler is only invoked if no static files match: - url: /static static_dir:

The app.yaml routing allows "fall-through" routing, where your application's handler is only invoked if no static files match: - url: /static static_dir: static/ - url: /.* script: _go_app The redirect 'map' smells bad- better to simply serve the file if path exists, redirect if it doesn't.