post-to-owner.py | Explore in Territory

import json

from wptserve.utils import isomorphic_decode

def main(request, response):
    headers = [
        (b"Content-Type", b"text/html"),
        (b"Cache-Control", b"no-cache, no-store, must-revalidate")
    ]

    body = u"""
        <!DOCTYPE html>
        <script>
            var data = %s;
            if (window.opener)
                window.opener.postMessage(data, "*");
            if (window.top != window)
                window.top.postMessage(data, "*");
        </script>
    """ % (json.dumps({
        u"dest": isomorphic_decode(request.headers.get(b"sec-fetch-dest", b"")),
        u"mode": isomorphic_decode(request.headers.get(b"sec-fetch-mode", b"")),
        u"site": isomorphic_decode(request.headers.get(b"sec-fetch-site", b"")),
        u"user": isomorphic_decode(request.headers.get(b"sec-fetch-user", b"")),
        }))
    return headers, body

chromium/third_party/blink/web_tests/external/wpt/fetch/metadata/resources/post-to-owner.py