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import os
def handle_headers(frame, request, response):
# Send two Early Hints responses.
first_preload = request.GET.first(b"first-preload").decode()
link_header_value = "<{}>; rel=preload; as=script".format(first_preload)
early_hints = [
(b":status", b"103"),
(b"content-security-policy", "script-src 'self' 'unsafe-inline'"),
(b"link", link_header_value),
]
response.writer.write_raw_header_frame(headers=early_hints,
end_headers=True)
second_preload = request.GET.first(b"second-preload").decode()
link_header_value = "<{}>; rel=preload; as=script".format(second_preload)
second_preload_origin = request.GET.first(b"second-preload-origin").decode()
csp_value = "script-src 'self' 'unsafe-inline' {}".format(second_preload_origin)
early_hints = [
(b":status", b"103"),
(b"content-security-policy", csp_value),
(b"link", link_header_value),
]
response.writer.write_raw_header_frame(headers=early_hints,
end_headers=True)
response.status = 200
response.headers[b"content-type"] = "text/html"
response.write_status_headers()
def main(request, response):
current_dir = os.path.dirname(os.path.realpath(__file__))
file_path = os.path.join(current_dir, "multiple-early-hints-responses.html")
with open(file_path, "r") as f:
test_content = f.read()
response.writer.write_data(item=test_content, last=True)
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