FLASK_APP_MUTATOR Superset example

flask_app_mutator_class.txt

def attach_handler(app):
    from flask import redirect, url_for
    app.wsgi_app = CustomProxyFix(app.wsgi_app)
 
class CustomProxyFix(object):
    def __init__(self, app):
        self.app = app
    def __call__(self, environ, start_response):
        host = environ.get('HTTP_X_FHOST', '')
        if host:
            environ['HTTP_HOST'] = host
        return self.app(environ, start_response)

FLASK_APP_MUTATOR = lambda app: attach_handler(app)

flask_app_mutator_decorators

def attach_handler(app):
    from flask import redirect, url_for
    
    @app.before_request
    def beforerequest():
        print("before_request!")
     
    @app.after_request
    def afterrequest(response):
        print("after_request is running!")
        return response

FLASK_APP_MUTATOR = lambda app: attach_handler(app)