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bazarr/libs/flask_restx/cors.py

63 lines
2.1 KiB

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from datetime import timedelta
from flask import make_response, request, current_app
from functools import update_wrapper
def crossdomain(
origin=None,
methods=None,
headers=None,
expose_headers=None,
max_age=21600,
attach_to_all=True,
automatic_options=True,
credentials=False,
):
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"""
https://web.archive.org/web/20190128010149/http://flask.pocoo.org/snippets/56/
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"""
if methods is not None:
methods = ", ".join(sorted(x.upper() for x in methods))
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if headers is not None and not isinstance(headers, str):
headers = ", ".join(x.upper() for x in headers)
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if expose_headers is not None and not isinstance(expose_headers, str):
expose_headers = ", ".join(x.upper() for x in expose_headers)
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if not isinstance(origin, str):
origin = ", ".join(origin)
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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"]
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def decorator(f):
def wrapped_function(*args, **kwargs):
if automatic_options and request.method == "OPTIONS":
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resp = current_app.make_default_options_response()
else:
resp = make_response(f(*args, **kwargs))
if not attach_to_all and request.method != "OPTIONS":
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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)
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if credentials:
h["Access-Control-Allow-Credentials"] = "true"
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if headers is not None:
h["Access-Control-Allow-Headers"] = headers
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if expose_headers is not None:
h["Access-Control-Expose-Headers"] = expose_headers
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return resp
f.provide_automatic_options = False
return update_wrapper(wrapped_function, f)
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return decorator