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import os
import time
def handle_headers(frame, request, response):
resource_url = request.GET.first(b"resource-url").decode()
link_header_value = "<{}>; rel=preload; as=script".format(resource_url)
early_hints = [
(b":status", b"103"),
(b"link", link_header_value),
]
response.writer.write_raw_header_frame(headers=early_hints,
end_headers=True)
# Sleep to simulate a slow generation of the final response.
time.sleep(0.1)
response.status = 200
response.headers[b"content-type"] = "image/png"
response.write_status_headers()
def main(request, response):
current_dir = os.path.dirname(os.path.realpath(__file__))
file_path = os.path.join(current_dir, "square.png")
with open(file_path, "rb") as f:
test_content = f.read()
response.writer.write_data(item=test_content, last=True)
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