Headers of https://www2.wiener-staatsoper.at/api/rbeventfeed/

HTTP/1.1 200 OK
Date
Wed, 26 May 2021 13:17:13 GMT
Server
Apache/2.4.25 (Debian)
Vary
Host
Content-Language
de
Cache-Tag
domainwww2wiener-staatsoperat pageId1
Content-Length
53
Cache-Control
max-age=0
Expires
Wed, 26 May 2021 13:17:13 GMT
X-UA-Compatible
IE=edge
X-Content-Type-Options
nosniff
Content-Type
application/json
Connection
close