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from cookies.resources.helpers import makeCookieHeader, setNoCacheAndCORSHeaders
from wptserve.utils import isomorphic_encode
def main(request, response):
"""Respond to `/cookie/set/samesite?{value}` by setting four cookies:
1. `samesite_strict={value};SameSite=Strict;path=/;domain={host}`
2. `samesite_lax={value};SameSite=Lax;path=/;domain={host}`
3. `samesite_none={value};SameSite=None;path=/;Secure;domain={host}`
4. `samesite_unspecified={value};path=/;domain={host}`
Where {host} is the hostname from which this page is served. (Requesting this resource
without a Host header will result in a 500 server error.)
Then navigate to a page that will post a message back to the opener with the set cookies"""
headers = setNoCacheAndCORSHeaders(request, response)
value = isomorphic_encode(request.url_parts.query)
host_header = request.headers['host']
hostname = host_header.split(b":")[0]
host = isomorphic_encode(hostname)
headers.append((b"Content-Type", b"text/html; charset=utf-8"))
headers.append(makeCookieHeader(b"samesite_strict", value, {b"SameSite":b"Strict", b"path":b"/", b"domain":host}))
headers.append(makeCookieHeader(b"samesite_lax", value, {b"SameSite":b"Lax", b"path":b"/", b"domain":host}))
# SameSite=None cookies must be Secure.
headers.append(makeCookieHeader(b"samesite_none", value, {b"SameSite":b"None", b"path":b"/", b"Secure": b"", b"domain":host}))
headers.append(makeCookieHeader(b"samesite_unspecified", value, {b"path":b"/", b"domain":host}))
document = b"""
<!DOCTYPE html>
<script>
// A same-site navigation, which should attach all cookies including SameSite ones.
// This is necessary because this page may have been reached via a cross-site navigation, so
// we might not have access to some SameSite cookies from here.
window.location = "../samesite/resources/echo-cookies.html";
</script>
"""
return headers, document