public function testCacheControlHeader() { $bag = new ResponseHeaderBag(array(), 'response'); $this->assertEquals('no-cache', $bag->get('Cache-Control')); $this->assertTrue($bag->hasCacheControlDirective('no-cache')); $bag = new ResponseHeaderBag(array('Cache-Control' => 'public'), 'response'); $this->assertEquals('public', $bag->get('Cache-Control')); $this->assertTrue($bag->hasCacheControlDirective('public')); $bag = new ResponseHeaderBag(array('ETag' => 'abcde'), 'response'); $this->assertEquals('private, max-age=0, must-revalidate', $bag->get('Cache-Control')); $this->assertTrue($bag->hasCacheControlDirective('private')); $this->assertTrue($bag->hasCacheControlDirective('must-revalidate')); $this->assertEquals(0, $bag->getCacheControlDirective('max-age')); $bag = new ResponseHeaderBag(array('Last-Modified' => 'abcde'), 'response'); $this->assertEquals('private, max-age=0, must-revalidate', $bag->get('Cache-Control')); $bag = new ResponseHeaderBag(array('Etag' => 'abcde', 'Last-Modified' => 'abcde'), 'response'); $this->assertEquals('private, max-age=0, must-revalidate', $bag->get('Cache-Control')); $bag = new ResponseHeaderBag(array('cache-control' => 'max-age=100'), 'response'); $this->assertEquals('max-age=100, private', $bag->get('Cache-Control')); $bag = new ResponseHeaderBag(array('cache-control' => 's-maxage=100'), 'response'); $this->assertEquals('s-maxage=100', $bag->get('Cache-Control')); $bag = new ResponseHeaderBag(array('cache-control' => 'private, max-age=100'), 'response'); $this->assertEquals('max-age=100, private', $bag->get('Cache-Control')); $bag = new ResponseHeaderBag(array('cache-control' => 'public, max-age=100'), 'response'); $this->assertEquals('max-age=100, public', $bag->get('Cache-Control')); }
/** * Returns the number of seconds after the time specified in the response's Date * header when the response should no longer be considered fresh. * * First, it checks for a s-maxage directive, then a max-age directive, and then it falls * back on an expires header. It returns null when no maximum age can be established. * * @return int|null Number of seconds * * @api */ public function getMaxAge() { if ($this->headers->hasCacheControlDirective('s-maxage')) { return (int) $this->headers->getCacheControlDirective('s-maxage'); } if ($this->headers->hasCacheControlDirective('max-age')) { return (int) $this->headers->getCacheControlDirective('max-age'); } if (null !== $this->getExpires()) { return $this->getExpires()->format('U') - $this->getDate()->format('U'); } }