README

Installation

composer require dogado/json-api-client

It's recommended to install guzzlehttp/guzzle version ^7.0 as http-client and http-interop/http-factory-guzzle for PSR-17 compatible factories.

composer require guzzlehttp/guzzle http-interop/http-factory-guzzle

You can also use any other HTTP client which implements PSR-18.

Usage

First you should read the docs of dogado/json-api-common where all basic structures will be explained.

Your API client is an instance of Dogado\JsonApi\Client\JsonApiClient, which requires a PSR-18 HTTP client (Psr\Http\Client\ClientInterface) to execute requests.

use Dogado\JsonApi\Client\JsonApiClient;
use Dogado\JsonApi\Client\Factory\RequestFactory;
use Dogado\JsonApi\Client\Validator\ResponseValidator;

$client = new JsonApiClient(
    $httpClient, // instance of Psr\Http\Client\ClientInterface
    $psrRequestFactory, // instance of Psr\Http\Message\RequestFactoryInterface
    $streamFactory, // instance of Psr\Http\Message\StreamFactoryInterface
    $serializer, // instance of Dogado\JsonApi\Serializer\DocumentSerializerInterface
    $responseFactory, // instance of Dogado\JsonApi\Client\Response\ResponseFactoryInterface
    $authMiddleware // optional instance of Dogado\JsonApi\Client\Middleware\AuthenticationMiddlewareInterface. See docs below.
);

$baseUrl = new Uri('http://example.com/api');
$requestFactory = new RequestFactory($baseUrl);

$request = $requestFactory->createGetRequest(new Uri('/myResource/1')); // will fetch the resource at http://example.com/api/myResource/1
$response = $client->execute($request);

// OPTIONAL: Validate the response to match your needs. See the ResponseValidator class for all assertion methods
(new ResponseValidator())->assertResourcesMatchTypeAndContainIds($response, 'myResource');

$document = $response->document();
$myResource = $document->data()->first(); // the resource fetched by this request
$myIncludedResources = $document->included()->all(); // the included resources fetched with the include parameter

Action Pattern

In most cases it's easier to capsule request scenarios into single classes since every request has its own requirements. In this package this is called Action. To make things easier, we already defined an AbstractAction class under the Dogado\JsonApi\Client\Action namespace. An example how to create such an action can be found in the tests.

When fetching resources in actions it's also very common to filter, paginate and sort. To define these options within Actions, there are multiple Traits you can use, defined in the same namespace as the AbstractAction class.

Authentication

When using a JSON:API client to access a server application you will probably need to be authenticated. As this a common use case, this client offers native support for authentication as so called "AuthenticationMiddleware" represented by an interface. The client provides a native set of authentication mechanisms: OAuth2 client credentials and HTTP basic auth, but you can create a custom middleware yourself based on the AuthenticationMiddlewareInterface if that doesn't fit your needs or feel free to create a pull request to add more authentications.

use Dogado\JsonApi\Serializer\Deserializer;
use Dogado\JsonApi\Serializer\Serializer;
use Dogado\JsonApi\Client\JsonApiClient;
use Dogado\JsonApi\Client\Response\ResponseFactory;
use Dogado\JsonApi\Client\Middleware\AuthenticationMiddleware;

/** @var Psr\Http\Client\ClientInterface $httpClient */
/** @var Psr\Http\Message\RequestFactoryInterface $requestFactory */
/** @var Psr\Http\Message\StreamFactoryInterface $streamFactory */
/** @var Psr\Http\Message\UriFactoryInterface $uriFactory */

// define which authentication you want to use (you can also leave the middleware `null` in order to use no authentication)
$authenticationMiddleware = new AuthenticationMiddleware();
$client = new JsonApiClient(
    $httpClient,
    $requestFactory,
    $streamFactory,
    new Serializer(),
    new ResponseFactory(
        new Deserializer()
    ),
    $authenticationMiddleware
);

###### HTTP basic auth
use Dogado\JsonApi\Client\Model\BasicCredentials;
$authenticationMiddleware->setBasicCredentials(new BasicCredentials('username', 'password'));

###### OAuth 2 client credentials
use Dogado\JsonApi\Client\Factory\Oauth2\CredentialFactory;
use Dogado\JsonApi\Client\Service\OAuth2Authenticator;
use Dogado\JsonApi\Client\Exception\Oauth2\AuthenticationException;

# the Authenticator class also allows you to overload the HTTP client and the auth storage factory it uses
$authenticator = new OAuth2Authenticator($httpClient, $requestFactory, $streamFactory, new CredentialFactory());
try {
    $oauth2Credentials = $authenticator->withClientCredentials($uriFactory->createUri('https://server.local/oauth/token'), 'Client-ID', 'Client-Secret');
    $authenticationMiddleware->setOAuth2Credentials($oauth2Credentials);
} catch (AuthenticationException $e) {
    // escalate any errors accordingly
}

OAuth2

The AuthenticationMiddleware class requires a Dogado\JsonApi\Client\Model\OAuth2Credentials instance which contains an access token, the token type and the expiration date. You can either create an instance yourself and insert the required data or use the Dogado\JsonApi\Client\Service\OAuth2Authenticator class to generate them.

Please cache the OAuth2Credentials instance as long as the method isExpired is not true, to prevent unnecessary authentication calls.

As the authentication endpoint does not follow the JSON:API protocol, it also throws no JSON:API specific errors or exceptions. The only relevant errors are variations of the Dogado\JsonApi\Client\Exception\Oauth2\AuthenticationException class which differentiates between error message and code. Such an exception instance also contains the plain response as Psr\Http\Message\ResponseInterface to have more context to an error.

Credits

• Chris Döhring
• Philipp Marien
• eosnewmedia team

This package contains code taken from enm/json-api-client.

License

The MIT License (MIT). Please see License File for more information.