lemur/lemur/decorators.py

55 lines
1.9 KiB
Python

"""
.. module: lemur.decorators
:copyright: (c) 2015 by Netflix Inc., see AUTHORS for more
:license: Apache, see LICENSE for more details.
"""
from datetime import timedelta
from flask import make_response, request, current_app
from functools import update_wrapper
# this is only used for dev
def crossdomain(origin=None, methods=None, headers=None,
max_age=21600, attach_to_all=True,
automatic_options=True): # pragma: no cover
if methods is not None:
methods = ', '.join(sorted(x.upper() for x in methods))
if headers is not None and not isinstance(headers, basestring):
headers = ', '.join(x.upper() for x in headers)
if not isinstance(origin, basestring):
origin = ', '.join(origin)
if isinstance(max_age, timedelta):
max_age = max_age.total_seconds()
def get_methods():
if methods is not None:
return methods
options_resp = current_app.make_default_options_response()
return options_resp.headers['allow']
def decorator(f):
def wrapped_function(*args, **kwargs):
if automatic_options and request.method == 'OPTIONS':
resp = current_app.make_default_options_response()
else:
resp = make_response(f(*args, **kwargs))
if not attach_to_all and request.method != 'OPTIONS':
return resp
h = resp.headers
h['Access-Control-Allow-Origin'] = origin
h['Access-Control-Allow-Methods'] = get_methods()
h['Access-Control-Max-Age'] = str(max_age)
h['Access-Control-Allow-Headers'] = "Origin, X-Requested-With, Content-Type, Accept, Authorization "
h['Access-Control-Allow-Credentials'] = 'true'
return resp
f.provide_automatic_options = False
return update_wrapper(wrapped_function, f)
return decorator