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Programming-Idioms

  • Pascal
  • Go

Idiom #324 Read HTTP response header

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

import "net/http"
c := res.Header.Get("cache-control")

http.Response.Header is an exported field
use HTTP::Tiny;
$resp = HTTP::Tiny->new->get($url); 

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

This is a simplistic example devoid of error checking. Minimally the response should be checked to make sure the get() succeeded otherwise this could generate a run time error.
New implementation...
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programming-idioms.org 
c := res.Header.Get("cache-control")
$resp = HTTP::Tiny->new->get($url); 

$cc = $resp->{'headers'}->{'cache-control'};
c = res.headers['cache-control']
c = URI.open(u) {|res| res.meta["cache-control"] }