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nicolas-grekasnicolas-grekas
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feature #48128 [HttpFoundation] Add support for the 103 status code (Early Hints) and other 1XX statuses (dunglas)
This PR was squashed before being merged into the 6.3 branch. Discussion ---------- [HttpFoundation] Add support for the 103 status code (Early Hints) and other 1XX statuses | Q | A | ------------- | --- | Branch? | 6.3 | Bug fix? | no | New feature? | yes <!-- please update src/**/CHANGELOG.md files --> | Deprecations? | yes <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files --> | Tickets | n/a <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead --> | License | MIT | Doc PR | todo This patch adds support for sending informational responses, including [Early Hints responses](https://developer.chrome.com/blog/early-hints/) if supported by the SAPI. It also allows sending other informational status codes such as 102 Processing. According to [Shopify](https://twitter.com/colinbendell/status/1539322190541295616) and [Cloudflare](http://blog.cloudflare.com/early-hints-performance), using Early Hints, the performance improvement to the Largest Contentful Paint can go from several hundred milliseconds, and up to a second faster. Usage: ```php <?php namespace App\Controller; use Symfony\Bundle\FrameworkBundle\Controller\AbstractController; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\Routing\Annotation\Route; use Symfony\Component\WebLink\Link; class HomepageController extends AbstractController { #[Route("/", name: "homepage")] public function index(): Response { $response = $this->sendEarlyHints([ (new Link(href: '/style.css'))->withAttribute('as', 'stylesheet'), (new Link(href: '/script.js'))->withAttribute('as', 'script'), ]); // Do something slow... return $this->render('homepage/index.html.twig', response: $response); } } ``` With this patch, HttpFoundation will leverage the `headers_send()` function provided by [FrankenPHP](https://frankenphp.dev). FrankenPHP is currently the only SAPI supporting Early Hints, but other SAPI such as mod_apache will probably implement this function at some point: php/php-src#7025 (comment) The low-level API is similar to the one provided by Go: golang/go#42597 The high-level API helper in `AbstractController` is similar to Node's one: nodejs/node#44180 Commits ------- 5be52b2 [HttpFoundation] Add support for the 103 status code (Early Hints) and other 1XX statuses
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‎UPGRADE-6.3.md

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@@ -57,6 +57,11 @@ FrameworkBundle
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* Deprecate the `notifier.logger_notification_listener` service, use the `notifier.notification_logger_listener` service instead
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HttpFoundation
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--------------
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* `Response::sendHeaders()` now takes an optional `$statusCode` parameter
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HttpKernel
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----------
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‎src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md

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@@ -17,6 +17,7 @@ CHANGELOG
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* Allow setting `debug.container.dump` to `false` to disable dumping the container to XML
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* Add `framework.http_cache.skip_response_headers` option
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* Display warmers duration on debug verbosity for `cache:clear` command
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* Add `AbstractController::sendEarlyHints()` to send HTTP Early Hints
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6.2
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---

‎src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php

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@@ -12,6 +12,7 @@
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namespace Symfony\Bundle\FrameworkBundle\Controller;
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use Psr\Container\ContainerInterface;
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use Psr\Link\EvolvableLinkInterface;
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use Psr\Link\LinkInterface;
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use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
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use Symfony\Component\DependencyInjection\ParameterBag\ContainerBagInterface;
@@ -42,6 +43,7 @@
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use Symfony\Component\Serializer\SerializerInterface;
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use Symfony\Component\WebLink\EventListener\AddLinkHeaderListener;
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use Symfony\Component\WebLink\GenericLinkProvider;
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use Symfony\Component\WebLink\HttpHeaderSerializer;
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use Symfony\Contracts\Service\Attribute\Required;
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use Symfony\Contracts\Service\ServiceSubscriberInterface;
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use Twig\Environment;
@@ -92,6 +94,7 @@ public static function getSubscribedServices(): array
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'security.token_storage' => '?'.TokenStorageInterface::class,
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'security.csrf.token_manager' => '?'.CsrfTokenManagerInterface::class,
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'parameter_bag' => '?'.ContainerBagInterface::class,
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'web_link.http_header_serializer' => '?'.HttpHeaderSerializer::class,
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];
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}
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@@ -402,4 +405,30 @@ protected function addLink(Request $request, LinkInterface $link): void
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$request->attributes->set('_links', $linkProvider->withLink($link));
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}
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/**
410+
* @param LinkInterface[] $links
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*/
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protected function sendEarlyHints(iterable $links, Response $response = null): Response
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{
414+
if (!$this->container->has('web_link.http_header_serializer')) {
415+
throw new \LogicException('You cannot use the "sendEarlyHints" method if the WebLink component is not available. Try running "composer require symfony/web-link".');
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}
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418+
$response ??= new Response();
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$populatedLinks = [];
421+
foreach ($links as $link) {
422+
if ($link instanceof EvolvableLinkInterface && !$link->getRels()) {
423+
$link = $link->withRel('preload');
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}
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426+
$populatedLinks[] = $link;
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}
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$response->headers->set('Link', $this->container->get('web_link.http_header_serializer')->serialize($populatedLinks), false);
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$response->sendHeaders(103);
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return $response;
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}
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}

‎src/Symfony/Bundle/FrameworkBundle/Resources/config/web_link.php

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@@ -12,10 +12,18 @@
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namespace Symfony\Component\DependencyInjection\Loader\Configurator;
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use Symfony\Component\WebLink\EventListener\AddLinkHeaderListener;
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use Symfony\Component\WebLink\HttpHeaderSerializer;
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return static function (ContainerConfigurator $container) {
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$container->services()
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->set('web_link.http_header_serializer', HttpHeaderSerializer::class)
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->alias(HttpHeaderSerializer::class, 'web_link.http_header_serializer')
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->set('web_link.add_link_header_listener', AddLinkHeaderListener::class)
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->args([
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service('web_link.http_header_serializer'),
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])
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->tag('kernel.event_subscriber')
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;
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};

‎src/Symfony/Bundle/FrameworkBundle/Tests/Controller/AbstractControllerTest.php

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@@ -45,6 +45,7 @@
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use Symfony\Component\Security\Core\User\InMemoryUser;
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use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
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use Symfony\Component\Serializer\SerializerInterface;
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use Symfony\Component\WebLink\HttpHeaderSerializer;
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use Symfony\Component\WebLink\Link;
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use Twig\Environment;
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@@ -72,6 +73,7 @@ public function testSubscribedServices()
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'parameter_bag' => '?Symfony\\Component\\DependencyInjection\\ParameterBag\\ContainerBagInterface',
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'security.token_storage' => '?Symfony\\Component\\Security\\Core\\Authentication\\Token\\Storage\\TokenStorageInterface',
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'security.csrf.token_manager' => '?Symfony\\Component\\Security\\Csrf\\CsrfTokenManagerInterface',
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'web_link.http_header_serializer' => '?Symfony\\Component\\WebLink\\HttpHeaderSerializer',
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];
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$this->assertEquals($expectedServices, $subscribed, 'Subscribed core services in AbstractController have changed');
@@ -677,4 +679,20 @@ public function testAddLink()
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$this->assertContains($link1, $links);
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$this->assertContains($link2, $links);
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}
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public function testSendEarlyHints()
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{
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$container = new Container();
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$container->set('web_link.http_header_serializer', new HttpHeaderSerializer());
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$controller = $this->createController();
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$controller->setContainer($container);
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$response = $controller->sendEarlyHints([
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(new Link(href: '/style.css'))->withAttribute('as', 'stylesheet'),
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(new Link(href: '/script.js'))->withAttribute('as', 'script'),
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]);
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$this->assertSame('</style.css>; rel="preload"; as="stylesheet",</script.js>; rel="preload"; as="script"', $response->headers->get('Link'));
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}
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}

‎src/Symfony/Bundle/FrameworkBundle/composer.json

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@@ -25,7 +25,7 @@
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"symfony/deprecation-contracts": "^2.5|^3",
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"symfony/error-handler": "^6.1",
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"symfony/event-dispatcher": "^5.4|^6.0",
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"symfony/http-foundation": "^6.2",
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"symfony/http-foundation": "^6.3",
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"symfony/http-kernel": "^6.3",
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"symfony/polyfill-mbstring": "~1.0",
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"symfony/filesystem": "^5.4|^6.0",

‎src/Symfony/Component/HttpFoundation/CHANGELOG.md

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@@ -7,6 +7,7 @@ CHANGELOG
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* Add `ParameterBag::getEnum()`
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* Create migration for session table when pdo handler is used
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* Add support for Relay PHP extension for Redis
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* The `Response::sendHeaders()` method now takes an optional HTTP status code as parameter, allowing to send informational responses such as Early Hints responses (103 status code)
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---

‎src/Symfony/Component/HttpFoundation/Response.php

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@@ -211,6 +211,11 @@ class Response
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511 => 'Network Authentication Required', // RFC6585
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];
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/**
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* Tracks headers already sent in informational responses.
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*/
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private array $sentHeaders;
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/**
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* @param int $status The HTTP status code (200 "OK" by default)
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*
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/**
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* Sends HTTP headers.
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*
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* @param null|positive-int $statusCode The status code to use, override the statusCode property if set and not null
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*
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* @return $this
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*/
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public function sendHeaders(): static
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public function sendHeaders(/* int $statusCode = null */): static
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{
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// headers have already been sent by the developer
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if (headers_sent()) {
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return $this;
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}
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$statusCode = \func_num_args() > 0 ? func_get_arg(0) : null;
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$informationalResponse = $statusCode >= 100 && $statusCode < 200;
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if ($informationalResponse && !\function_exists('headers_send')) {
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// skip informational responses if not supported by the SAPI
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return $this;
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}
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// headers
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foreach ($this->headers->allPreserveCaseWithoutCookies() as $name => $values) {
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$replace = 0 === strcasecmp($name, 'Content-Type');
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foreach ($values as $value) {
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$newValues = $values;
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$replace = false;
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// As recommended by RFC 8297, PHP automatically copies headers from previous 103 responses, we need to deal with that if headers changed
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if (103 === $statusCode) {
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$previousValues = $this->sentHeaders[$name] ?? null;
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if ($previousValues === $values) {
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// Header already sent in a previous response, it will be automatically copied in this response by PHP
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continue;
363+
}
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$replace = 0 === strcasecmp($name, 'Content-Type');
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367+
if (null !== $previousValues && array_diff($previousValues, $values)) {
368+
header_remove($name);
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$previousValues = null;
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}
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$newValues = null === $previousValues ? $values : array_diff($values, $previousValues);
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}
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foreach ($newValues as $value) {
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header($name.': '.$value, $replace, $this->statusCode);
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}
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if ($informationalResponse) {
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$this->sentHeaders[$name] = $values;
381+
}
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}
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// cookies
347385
foreach ($this->headers->getCookies() as $cookie) {
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header('Set-Cookie: '.$cookie, false, $this->statusCode);
349387
}
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389+
if ($informationalResponse) {
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headers_send($statusCode);
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return $this;
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}
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$statusCode ??= $this->statusCode;
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// status
352-
header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText), true, $this->statusCode);
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header(sprintf('HTTP/%s %s %s', $this->version, $statusCode, $this->statusText), true, $statusCode);
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return $this;
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}

‎src/Symfony/Component/HttpFoundation/StreamedResponse.php

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@@ -59,17 +59,22 @@ public function setCallback(callable $callback): static
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/**
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* This method only sends the headers once.
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*
62+
* @param null|positive-int $statusCode The status code to use, override the statusCode property if set and not null
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*
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* @return $this
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*/
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public function sendHeaders(): static
66+
public function sendHeaders(/* int $statusCode = null */): static
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{
6668
if ($this->headersSent) {
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return $this;
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}
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70-
$this->headersSent = true;
72+
$statusCode = \func_num_args() > 0 ? func_get_arg(0) : null;
73+
if ($statusCode < 100 || $statusCode >= 200) {
74+
$this->headersSent = true;
75+
}
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72-
return parent::sendHeaders();
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return parent::sendHeaders($statusCode);
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}
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/**

‎src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php

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$this->assertSame($response, $headers);
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}
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public function testSendInformationalResponse()
46+
{
47+
$response = new Response();
48+
$response->sendHeaders(103);
49+
50+
// Informational responses must not override the main status code
51+
$this->assertSame(200, $response->getStatusCode());
52+
53+
$response->sendHeaders();
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}
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public function testSend()
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{
4758
$response = new Response();

‎src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php

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@@ -124,4 +124,15 @@ public function testSetNotModified()
124124
$string = ob_get_clean();
125125
$this->assertEmpty($string);
126126
}
127+
128+
public function testSendInformationalResponse()
129+
{
130+
$response = new StreamedResponse();
131+
$response->sendHeaders(103);
132+
133+
// Informational responses must not override the main status code
134+
$this->assertSame(200, $response->getStatusCode());
135+
136+
$response->sendHeaders();
137+
}
127138
}

‎src/Symfony/Component/WebLink/EventListener/AddLinkHeaderListener.php

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@@ -29,11 +29,9 @@ class_exists(HttpHeaderSerializer::class);
2929
*/
3030
class AddLinkHeaderListener implements EventSubscriberInterface
3131
{
32-
private HttpHeaderSerializer $serializer;
33-
34-
public function __construct()
35-
{
36-
$this->serializer = new HttpHeaderSerializer();
32+
public function __construct(
33+
private readonly HttpHeaderSerializer $serializer = new HttpHeaderSerializer(),
34+
) {
3735
}
3836

3937
public function onKernelResponse(ResponseEvent $event): void

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