Static URL rule not being added on GAE with static_dir handler

[sirn]

When app.yaml has static_dir point to Flask application's static/ directory, os.path.exists will always return False and thus causing _PackageBoundObject.has_static_dir to return False making static URL rule not being added at initialization.

Example:

app.yaml

application: demo
version: 1
runtime: python
api_version: 1

handlers:
- url: /static
  static_dir: static

- url: /.*
  script: app.py

app.py

from google.appengine.ext.webapp.util import run_wsgi_app
from flask import Flask
app = Flask(__name__)

@app.route('/')
def demo():
    return str(app.has_static_folder)

def main():
    run_wsgi_app(app)

if __name__ == '__main__':
    main()

This will return False but will return True once I comment out the static handler. Current workaround is to add static rule myself, using app.add_url_rule(app.static_path + '/<path:filename>', endpoint='static') of sort. It would be nice of Flask detects GAE and add the static path anyway.

[mitsuhiko]

The solution is probably to just register the rule anyways. Detecting GAE sounds abit fishy and would change behavior for a specific environment. Unless someone can figure out any reasonable ways to fix that.

[mitsuhiko]

Always register URL rules. This closed by ed16ae2