Static analysis checks for Flask, by r2c. Available in our free program analysis tool, Bento. (ht
pip install flake8-flask
Validate the install using
> flake8 --version 3.7.9 (flake8-flask: 0.9.3, mccabe: 0.6.1, pycodestyle: 2.5.0, pyflakes: 2.1.1)
List of warnings
r2c-flask-send-file-open: This check detects the use of a file-like object in
flask.send_file without either
attachment_filename keyword arguments.
send_file will throw a ValueError in this situation.
r2c-flask-secure-set-cookie: This check detects calls to
response.set_cookie that do not have
samesite set. This follows the guidance in the Flask documentation.
r2c-flask-unescaped-file-extension: Flask will not autoescape Jinja templates that do not have .html, .htm, .xml, or .xhtml as extensions. This check will alert you if you do not have one of these extensions. This check will also do its best to detect if context variables are escaped if a non-escaped extension is used.
r2c-flask-use-blueprint-for-modularity: This check recommends using Blueprint when there are too many route handlers in a single file. Blueprint encourages modularity and can greatly simplify how large applications work and provide a central means for Flask extensions to register operations on applications.
flask.jsonify() is a Flask helper method which handles the correct settings for returning JSON from Flask routes. This check catches uses of
json.dumps() returned from Flask routes and encourages
r2c-flask-missing-jwt-token: This check alerts when
@jwt_refresh_token_required decorators are missing in files where
flask_jwt_simple packages are imported.
Have an idea for a check? Reach out to us at https://r2c.dev!
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