Output HTTP headers from the most recent request by using %header{name} where name is the case insensitive name of the header (without the trailing colon). The header contents are exactly as sent over the network, with leading and trailing whitespace trimmed (added in 7.84.0).
Summary
%header
syntaxが使えない問題の修正。References
curlについて。
%header
は、7.84で追加された。 https://curl.se/docs/manpage.html