Check if Flask request context is available

Question

I want to log some data from context variables (request, session) when logging during a Flask request, but use default behavior if not.

I'm using a try ... except block in logging.formatter. Is there a better way to check for a request context?

try:
    record.user = session['user_name']
    record.very_important_data = request.super_secret
except Exception:
    record.user = None

davidism · Accepted Answer · 2019-10-25 22:00:47Z

74

Use has_request_context or has_app_context.

if has_request_context():
    # request is active

Alternatively, current_app, g, request, and session are all instances of LocalProxy. If a proxy is not bound, it will be False when treated as a boolean.

if request:
    # request is active

edited Oct 25, 2019 at 22:00

answered Oct 27, 2016 at 13:42

davidism

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