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import functools
import flask
def add_response_headers(headers: dict):
"""This decorator adds the headers passed in to the response"""
def decorator(f):
def decorated_function(*args, **kwargs):
resp = flask.make_response(f(*args, **kwargs))
h = resp.headers
for header, value in headers.items():
h[header] = value
return resp
return decorated_function
return decorator
def vary_xhr():
"""View function decorator; adds HTTP header "Vary: X-Requested-With" to the response"""
def decorator(f):
header_adder = add_response_headers({'Vary': 'X-Requested-With'})
return header_adder(f)
return decorator

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