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Fix two edge cases in ResponseCacheStrategy #23129

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Fix two edge cases in ResponseCacheStrategy #23129

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894ae0d
Fix two edge cases when merging private responses or responses with n…
mpdude Jun 10, 2017
78555a8
Undo negated test (mistakenly added while investigating yet another e…
mpdude Jun 10, 2017
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2 changes: 1 addition & 1 deletion src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ class ResponseCacheStrategy implements ResponseCacheStrategyInterface
*/
public function add(Response $response)
{
if ($response->isValidateable()) {
if ($response->isValidateable() || !$response->isCacheable()) {
$this->cacheable = false;
} else {
$maxAge = $response->getMaxAge();
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41 changes: 41 additions & 0 deletions src/Symfony/Component/HttpKernel/Tests/HttpCache/ResponseCacheStrategyTest.php
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Expand Up @@ -137,4 +137,45 @@ public function testMasterResponseWithExpirationIsUnchangedWhenThereIsNoEmbedded

$this->assertTrue($masterResponse->isFresh());
}

public function testMasterResponseIsNotCacheableWhenEmbeddedResponseIsNotCacheable()
{
$cacheStrategy = new ResponseCacheStrategy();

$masterResponse = new Response();
$masterResponse->setSharedMaxAge(3600); // Public, cacheable

/* This response has no validation or expiration information.
That makes it uncacheable, it is always stale.
(It does *not* make this private, though.) */
$embeddedResponse = new Response();
$this->assertFalse($embeddedResponse->isFresh()); // not fresh, as no lifetime is provided

$cacheStrategy->add($embeddedResponse);
$cacheStrategy->update($masterResponse);

$this->assertTrue($masterResponse->headers->hasCacheControlDirective('no-cache'));
$this->assertTrue($masterResponse->headers->hasCacheControlDirective('must-revalidate'));
$this->assertFalse($masterResponse->isFresh());
}

public function testEmbeddingPrivateResponseMakesMainResponsePrivate()
{
$cacheStrategy = new ResponseCacheStrategy();

$masterResponse = new Response();
$masterResponse->setSharedMaxAge(3600); // public, cacheable

// The embedded response might for example contain per-user data that remains valid for 60 seconds
$embeddedResponse = new Response();
$embeddedResponse->setPrivate();
$embeddedResponse->setMaxAge(60); // this would implicitly set "private" as well, but let's be explicit

$cacheStrategy->add($embeddedResponse);
$cacheStrategy->update($masterResponse);

$this->assertTrue($masterResponse->headers->hasCacheControlDirective('private'));
// Not sure if we should pass "max-age: 60" in this case, as long as the response is private and
// that's the more conservative of both the master and embedded response...?
}
}