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The PSR-7 Bridge
The PSR-7 bridge converts HttpFoundation objects from and to objects implementing HTTP message interfaces defined by the PSR-7.
Installation
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$ composer require symfony/psr-http-message-bridgeNote
If you install this component outside of a Symfony application, you must
require the vendor/autoload.php file in your code to enable the class
autoloading mechanism provided by Composer. Read
this article for more details.
The bridge also needs a PSR-7 and PSR-17 implementation to convert
HttpFoundation objects to PSR-7 objects. The following command installs the
nyholm/psr7 library, a lightweight and fast PSR-7 implementation, but you
can use any of the libraries that implement psr/http-factory-implementation:
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$ composer require nyholm/psr7Usage
Converting from HttpFoundation Objects to PSR-7
The bridge provides an interface of a factory called HttpMessageFactoryInterface that builds objects implementing PSR-7 interfaces from HttpFoundation objects.
The following code snippet explains how to convert a Request
to a Nyholm\Psr7\ServerRequest class implementing the
Psr\Http\Message\ServerRequestInterface interface:
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use Nyholm\Psr7\Factory\Psr17Factory;
use Symfony\Bridge\PsrHttpMessage\Factory\PsrHttpFactory;
use Symfony\Component\HttpFoundation\Request;
$symfonyRequest = new Request([], [], [], [], [], ['HTTP_HOST' => 'dunglas.fr'], 'Content');
// The HTTP_HOST server key must be set to avoid an unexpected error
$psr17Factory = new Psr17Factory();
$psrHttpFactory = new PsrHttpFactory($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
$psrRequest = $psrHttpFactory->createRequest($symfonyRequest);And now from a Response to a
Nyholm\Psr7\Response class implementing the
Psr\Http\Message\ResponseInterface interface:
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use Nyholm\Psr7\Factory\Psr17Factory;
use Symfony\Bridge\PsrHttpMessage\Factory\PsrHttpFactory;
use Symfony\Component\HttpFoundation\Response;
$symfonyResponse = new Response('Content');
$psr17Factory = new Psr17Factory();
$psrHttpFactory = new PsrHttpFactory($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
$psrResponse = $psrHttpFactory->createResponse($symfonyResponse);Converting Objects implementing PSR-7 Interfaces to HttpFoundation
On the other hand, the bridge provide a factory interface called HttpFoundationFactoryInterface that builds HttpFoundation objects from objects implementing PSR-7 interfaces.
The next snippet explain how to convert an object implementing the
Psr\Http\Message\ServerRequestInterface interface to a
Request instance:
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use Symfony\Bridge\PsrHttpMessage\Factory\HttpFoundationFactory;
// $psrRequest is an instance of Psr\Http\Message\ServerRequestInterface
$httpFoundationFactory = new HttpFoundationFactory();
$symfonyRequest = $httpFoundationFactory->createRequest($psrRequest);From an object implementing the Psr\Http\Message\ResponseInterface
to a Response instance:
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use Symfony\Bridge\PsrHttpMessage\Factory\HttpFoundationFactory;
// $psrResponse is an instance of Psr\Http\Message\ResponseInterface
$httpFoundationFactory = new HttpFoundationFactory();
$symfonyResponse = $httpFoundationFactory->createResponse($psrResponse);