404-with-early-hints.h2.py (823B)
1 import os 2 3 4 def handle_headers(frame, request, response): 5 resource_url = request.GET.first(b"resource-url").decode() 6 link_header_value = "<{}>; rel=preload; as=image".format(resource_url) 7 early_hints = [ 8 (b":status", b"103"), 9 (b"link", link_header_value), 10 ] 11 response.writer.write_raw_header_frame(headers=early_hints, 12 end_headers=True) 13 14 response.status = 404 15 response.headers[b"content-type"] = "text/html" 16 response.write_status_headers() 17 18 19 def main(request, response): 20 current_dir = os.path.dirname(os.path.realpath(__file__)) 21 file_path = os.path.join(current_dir, "404-with-early-hints.html") 22 with open(file_path, "r") as f: 23 test_content = f.read() 24 response.writer.write_data(item=test_content, last=True)