Headers of https://www.duolingo.com/

HTTP/1.1 200 OK
Date
Tue, 16 Jul 2019 12:41:13 GMT
Content-Type
text/html; charset=UTF-8
Content-Length
25100
Connection
close
set-cookie
AWSALB=lnMUpsQT+KHLFysLBUXo0rP0Yk7NZkkzpUGcsnjm0FCOuizGlPRRTPR9ZN2tx74/nLJPO+ZF3Bp0k8zgsWwyb5+ODkQ8j8Ztfplg0aYQ+0JncuhwnqPMxR6J4mYp; Expires=Tue, 23 Jul 2019 12:41:13 GMT; Path=/
server
duo-api
set-cookie
logged_out_uuid=569d9579-ed91-4908-b490-2ef72224b48c; Domain=.duolingo.com; Max-Age=31536000; Path=/; expires=Wed, 15-Jul-2020 12:41:13 GMT
set-cookie
lang=en; Domain=.duolingo.com; Max-Age=31536000; Path=/; expires=Wed, 15-Jul-2020 12:41:13 GMT
surrogate-control
no-store
expires
0
pragma
no-cache
cache-control
no-store, no-cache, must-revalidate, proxy-revalidate
x-frame-options
SAMEORIGIN
x-tid
ffff03cb5d2dc3460489
x-ws
UK
set-cookie
wuuid=a7bf1ee6-aa58-4c0f-8ec9-54dfbbf2ff9f
x-runtime
0.03732
x-ipcountry
US
x-envoy-upstream-service-time
39
x-duo-request-host
www.duolingo.com