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El proxy Squid no almacena nada en caché

tag-icon • tag-icon proxy reverse-proxy squid cache
El proxy Squid no almacena nada en caché

calamar.conf:

http_access allow all

# Squid normally listens to port 3128
http_port 3128 accel defaultsite=localhost no-vhost

cache_peer localhost parent 80 0 no-query originserver name=myAccel
cache_peer_access myAccel allow all

# Uncomment and adjust the following to add a disk cache directory.
cache_dir ufs /usr/local/var/cache/squid 100 16 256

# Leave coredumps in the first cache dir
coredump_dir /usr/local/var/cache/squid

Squid 3.2.9, instalado en OSX a través de Homebrew

localhost: ~ $ squid -v
Squid Cache: Version 3.2.9
configure options:  '--disable-debug' '--disable-dependency-tracking' '--prefix=/usr/local/Cellar/squid/3.2.9' '--localstatedir=/usr/local/var' 'CC=cc' 'CXX=c++' 'PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig'

Calamares iniciados consquid -f squid.conf -d 2 -N

El flujo ascendente devuelve encabezados Cache-Control válidos, que verifiqué que son correctos visitando la página en Google Chrome 26 y mirándola en Chrome Dev Tools.

localhost: ~ $ curl -s -o /dev/null --dump-header /dev/stdout  http://localhost/test.php
HTTP/1.1 200 OK
Date: Tue, 16 Apr 2013 21:29:33 GMT
Server: Apache/2.2.22 (Unix) DAV/2 PHP/5.3.15 with Suhosin-Patch mod_ssl/2.2.22 OpenSSL/0.9.8r
X-Powered-By: PHP/5.3.15
Cache-Control: max-age=60, public
Content-Length: 16
Content-Type: text/html
X-Pad: avoid browser bug

Pero cuando consulto la página a través del proxy inverso de Squid, siempre obtengo un error de caché.

localhost: ~ $ curl -s -o /dev/null --dump-header /dev/stdout  http://localhost:3128/test.php
HTTP/1.1 200 OK
Date: Tue, 16 Apr 2013 21:29:34 GMT
Server: Apache/2.2.22 (Unix) DAV/2 PHP/5.3.15 with Suhosin-Patch mod_ssl/2.2.22 OpenSSL/0.9.8r
X-Powered-By: PHP/5.3.15
Cache-Control: max-age=60, public
Content-Length: 16
Content-Type: text/html
X-Cache: MISS from localhost
Via: 1.1 localhost (squid/3.2.9)
Connection: keep-alive

localhost: ~ $ curl -s -o /dev/null --dump-header /dev/stdout  http://localhost:3128/test.php
HTTP/1.1 200 OK
Date: Tue, 16 Apr 2013 21:29:38 GMT
Server: Apache/2.2.22 (Unix) DAV/2 PHP/5.3.15 with Suhosin-Patch mod_ssl/2.2.22 OpenSSL/0.9.8r
X-Powered-By: PHP/5.3.15
Cache-Control: max-age=60, public
Content-Length: 16
Content-Type: text/html
X-Cache: MISS from localhost
Via: 1.1 localhost (squid/3.2.9)
Connection: keep-alive

¿Qué pasa con mi configuración?

Respuesta1

Oh, mierda, lo descubrí.

Squid ignora los encabezados de caché de menos de O IGUAL A un minuto. Entonces max-age=60 se ignora, pero max-age=61 funciona de maravilla.

<?php
Header('Cache-Control: max-age=61');

?><html>hi</html>

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