chromium/third_party/blink/web_tests/external/wpt/fetch/h1-parsing/resources/script-with-0x00-in-header.py

def main(request, response):
    response.headers.set(b"Content-Type", b"text/javascript")
    response.headers.set(b"Custom", b"\0")
    return b"var thisIsJavaScript = 0"