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Idiom #324 Read HTTP response header

Set the string c to the (first) value of the header "cache-control" of the HTTP response res.

require 'open-uri'
c = URI.open(u) {|res| res.meta["cache-control"] }

import requests
c = res.headers['cache-control']

"requests" is a 3rd-party library
import "net/http"
c := res.Header.Get("cache-control")

http.Response.Header is an exported field
New implementation...
< > ⌨
programming-idioms.org 
c = URI.open(u) {|res| res.meta["cache-control"] }

c = res.headers['cache-control']
c := res.Header.Get("cache-control")
$resp = HTTP::Tiny->new->get($url); 

$cc = $resp->{'headers'}->{'cache-control'};