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