def main(request, response):
coop = request.GET.first(b"coop")
coep = request.GET.first(b"coep")
sandbox = request.GET.first(b"sandbox")
if coop != "":
response.headers.set(b"Cross-Origin-Opener-Policy", coop)
if coep != "":
response.headers.set(b"Cross-Origin-Embedder-Policy", coep)
response.headers.set(b"Content-Security-Policy", b"sandbox " + sandbox + b";")
# Open a popup to coop-coep.py with the same parameters (except sandbox)
response.content = b"""
"""