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<?php
/*
* Copyright 2015 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Auth\Middleware;
use GuzzleHttp\Psr7;
use Psr\Http\Message\RequestInterface;
/**
* SimpleMiddleware is a Guzzle Middleware that implements Google's Simple API
* access.
*
* Requests are accessed using the Simple API access developer key.
*/
class SimpleMiddleware
{
/**
* @var array
*/
private $config;
/**
* Create a new Simple plugin.
*
* The configuration array expects one option
* - key: required, otherwise InvalidArgumentException is thrown
*
* @param array $config Configuration array
*/
public function __construct(array $config)
{
if (!isset($config['key'])) {
throw new \InvalidArgumentException('requires a key to have been set');
}
$this->config = array_merge(['key' => null], $config);
}
/**
* Updates the request query with the developer key if auth is set to simple.
*
* use Google\Auth\Middleware\SimpleMiddleware;
* use GuzzleHttp\Client;
* use GuzzleHttp\HandlerStack;
*
* $my_key = 'is not the same as yours';
* $middleware = new SimpleMiddleware(['key' => $my_key]);
* $stack = HandlerStack::create();
* $stack->push($middleware);
*
* $client = new Client([
* 'handler' => $stack,
* 'base_uri' => 'https://www.googleapis.com/discovery/v1/',
* 'auth' => 'simple'
* ]);
*
* $res = $client->get('drive/v2/rest');
*
* @param callable $handler
* @return \Closure
*/
public function __invoke(callable $handler)
{
return function (RequestInterface $request, array $options) use ($handler) {
// Requests using "auth"="scoped" will be authorized.
if (!isset($options['auth']) || $options['auth'] !== 'simple') {
return $handler($request, $options);
}
$query = Psr7\parse_query($request->getUri()->getQuery());
$params = array_merge($query, $this->config);
$uri = $request->getUri()->withQuery(Psr7\build_query($params));
$request = $request->withUri($uri);
return $handler($request, $options);
};
}
}
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