How do I make `all(http.request.headers["content-type"][*] == "application/json")` fail if `content-

How do I make

all(http.request.headers["content-type"][*] == "application/json")

all(http.request.headers["content-type"][*] == "application/json")

fail if

content-type

content-type

isn't present?

How do I make `all(http.request.headers["content-type"][*] == "application/json")` fail if `content- - Cloudflare Developers