Accessing / with curl returns 400 (bad request)

1

Dear Indico community,

I wonder why 400 is returned:

$ curl -I https://indico.cern.ch/
HTTP/1.1 400 BAD REQUEST
server: nginx/1.20.1
date: Tue, 25 Nov 2025 08:08:37 GMT
content-type: text/html; charset=utf-8
content-length: 90832
x-indico-url: /
set-cookie: indico-worker=indico-cern-wk1; path=/; HttpOnly

Kind regards,

Paul

2

Send a normal GET request instead of HEAD

3

Understood.

Could you elaborate on the reason, why this is implemented this way?