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