view code return

Ejemplo de Cabecera de Requerimiento:

user-agent CCBot/2.0 (https://commoncrawl.org/faq/)
accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
accept-language en-US,en;q=0.5
if-modified-since Tue, 23 Apr 2019 17:59:03 CEST
host oed.usal.es
connection Keep-Alive
accept-encoding gzip