Отправляется браузером:
:authority: site.ru
:method: GET
:path: /test.jpg
:scheme: https
accept: image/avif,image/webp,image/apng,image/*,*/*;q=0.8
accept-encoding: gzip, deflate, br
accept-language: ru,en;q=0.9,tr;q=0.8
referer: https://site.ru/
sec-fetch-dest: image
sec-fetch-mode: no-cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 YaBrowser/20.9.3.136 Yowser/2.5 Safari/537.36

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Ответ браузера:
cache-control: public, max-age=31536000
content-type: image/jpeg
date: Thu, 12 Nov 2020 07:00:32 GMT
expires: Thu, 19 Nov 1981 08:52:00 GMT
set-cookie: expires=Fri, 12-Nov-2021 07:00:32 GMT; Max-Age=31536000; path=/
status: 200
vary: Accept-Encoding
accept: image/avif,image/webp,image/apng,image/*,*/*;q=0.8
accept-encoding: gzip, deflate, br
accept-language: ru,en;q=0.9,tr;q=0.8
referer: https://site.ru/
sec-fetch-dest: image
sec-fetch-mode: no-cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 YaBrowser/20.9.3.136 Yowser/2.5 Safari/537.36