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By Thijs Feryn
Let the
application
do the work
Not
the VCL
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Hi, I’m Thijs
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I’m
@ThijsFeryn
on Twitter
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I’m an
Evangelist
At
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I’m an
at
Evangelist
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I’m a
at
board member
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Previously
on Varnish
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No content
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Varnish still
considered a
sysadmin
responsibility
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Developers
Sysadmins
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Architecture
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When you respect HTTP
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Collaboration & empathy
AKA DevOps
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Today
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Twitter Bootstrap
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No content
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Don’t cache header
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Cache footer until
31/12/2015 23:59:59
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Cache for a day
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Cache for an hour
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Expires: Thu, 31 Dec 2015 23:59:59 GMT
Cache-Control: s-maxage=86400
Cache-Control: s-maxage=3600
Cache-Control: no-cache, no-store, s-maxage=0
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The Demo
Sign in
Toggle navigation
Project name
Hello, world!
This is a template for a simple marketing or informational website. It includes a large callout called a jumbotron and three supporting pieces of content. Use it as a starting point to create something more unique.
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I’m a PHP guy
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Silex micro-
framework
http://silex.sensiolabs.org
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Twig
templates
http://twig.sensiolabs.org
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The Demo
{{ render_esi(url('nav')) }}
{{ render_esi(url('jumbotron')) }}
{% block content %}{% endblock %}
{{ render_esi(url('footer')) }}
{{ render_esi(url('footer')) }}
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The Demo
{{ render_esi(url('nav')) }}
{{ render_esi(url('jumbotron')) }}
{% block content %}{% endblock %}
{{ render_esi(url('footer')) }}
ESI tags
{{ render_esi(url('footer')) }}
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The Demo
{% block content %}{% endblock %}
ESI tags
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register(new TwigServiceProvider(), array(
'twig.path' => dirname(__DIR__).'/views',
));
$app->register(new HttpFragmentServiceProvider());
$app->register(new UrlGeneratorServiceProvider());
$app->register(new SessionServiceProvider());
Init
code
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Base controller
$app->get('/', function () use ($app) {
$response = new Response($app['twig']->render('index.twig'));
$response->setSharedMaxAge(3600);
return $response;
})->bind('home');
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{% extends "layout.twig" %}
{% block content %}
{% endblock %}
Heading
Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.
Heading
Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.
Heading
Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.
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Navigation controller
$app->get('/nav', function () use ($app) {
//+ ADD MORE SESSION LOGIC
$response = new Response($app['twig']->render('nav.twig'));
$response->headers->addCacheControlDirective('no-cache',true);
$response->headers->addCacheControlDirective('no-store',true);
return $response;
})->bind('nav');
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Jumbotron controller
$app->get('/jumbotron', function () use ($app) {
$response = new Response($app['twig']->render('jumbotron.twig'));
$response->setSharedMaxAge(86400);
return $response;
})->bind('jumbotron');
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Hello, world!
This is a template for a simple marketing or informational website. It includes a large callout called a jumbotron and three supporting pieces of content. Use it as a starting point to create something more unique. p>
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Footer controller
$app->get('/footer', function () use ($app) {
$response = new Response($app[‘twig']->render('footer.twig'));
$response->setPublic();
$response->setExpires(
DateTime::createFromFormat(
"m-d H:i:s",'12-31 23:59:59',
new DateTimeZone('Europe/London')
)
);
return $response;
})->bind('footer');
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© {{ "now"|date("Y") }} Company, Inc.
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Full HTML
returned,
even without
Varnish
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How does it
work?
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vcl 4.0;
backend default {
.host = "127.0.0.1";
.port = "8888";
}
sub vcl_recv {
set req.http.Surrogate-Capability = “key=ESI/1.0";
return(hash);
}
sub vcl_backend_response {
if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
unset beresp.http.Surrogate-Control;
set beresp.do_esi = true;
}
}
Simplified
VCL
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HttpFragmentServiceProvider
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register(new \Silex\Provider\TwigServiceProvider(), array(
'twig.path' => dirname(__DIR__).'/views',
));
$app->register(new Silex\Provider\HttpFragmentServiceProvider());
$app->register(new Silex\Provider\UrlGeneratorServiceProvider());
$app->register(new Silex\Provider\SessionServiceProvider());
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{{ render_esi(url('nav')) }}
Controller
name
URL
generator
ESI
rendering
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curl -H "Surrogate-Capability:
key=ESI/1.0" localhost:8888/
Sends Surrogate-
Control response
header back to
Varnish
ESI
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Internal
subrequest
curl localhost:8888/
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All ESI tags
could be
replaced with
AJAX calls
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No content
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More
Javascript
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More async
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Graceful
degradation
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No content
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ESI without
Varnish
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CDN
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HttpCacheServiceProvider
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register(new \Silex\Provider\TwigServiceProvider(), array(
'twig.path' => dirname(__DIR__).'/views',
));
$app->register(new Silex\Provider
\HttpCacheServiceProvider(), array(
'http_cache.cache_dir' => dirname(__DIR__).'/cache/',
));
$app->register(new Silex\Provider\HttpFragmentServiceProvider());
$app->register(new Silex\Provider\UrlGeneratorServiceProvider());
$app->register(new Silex\Provider\SessionServiceProvider());
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//$app->run();
$app['http_cache']->run();
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No content
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No content
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No content