chromium/third_party/blink/web_tests/external/wpt/xhr/resources/access-control-basic-allow-no-credentials.py

def main(request, response):
    response.headers.set(b"Content-Type", b"text/plain")
    response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"origin"))

    response.content = b"PASS: Cross-domain access allowed."