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<?php
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/**
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* Copyright 2017 Facebook, Inc.
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*
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* You are hereby granted a non-exclusive, worldwide, royalty-free license to
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* use, copy, modify, and distribute this software in source code or binary
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* form for use in connection with the web services and APIs provided by
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* Facebook.
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*
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* As with any software that integrates with the Facebook platform, your use
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* of this software is subject to the Facebook Developer Principles and
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* Policies [http://developers.facebook.com/policy/]. This copyright notice
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* shall be included in all copies or substantial portions of the software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Facebook\HttpClients;
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use GuzzleHttp\Client;
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use InvalidArgumentException;
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use Exception;
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class HttpClientsFactory
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{
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private function __construct()
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{
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// a factory constructor should never be invoked
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}
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/**
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* HTTP client generation.
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*
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* @param FacebookHttpClientInterface|Client|string|null $handler
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*
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* @throws Exception If the cURL extension or the Guzzle client aren't available (if required).
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* @throws InvalidArgumentException If the http client handler isn't "curl", "stream", "guzzle", or an instance of Facebook\HttpClients\FacebookHttpClientInterface.
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*
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* @return FacebookHttpClientInterface
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*/
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public static function createHttpClient($handler)
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{
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if (!$handler) {
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return self::detectDefaultClient();
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}
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if ($handler instanceof FacebookHttpClientInterface) {
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return $handler;
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}
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if ('stream' === $handler) {
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return new FacebookStreamHttpClient();
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}
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if ('curl' === $handler) {
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if (!extension_loaded('curl')) {
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throw new Exception('The cURL extension must be loaded in order to use the "curl" handler.');
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}
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return new FacebookCurlHttpClient();
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}
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if ('guzzle' === $handler && !class_exists('GuzzleHttp\Client')) {
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throw new Exception('The Guzzle HTTP client must be included in order to use the "guzzle" handler.');
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}
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if ($handler instanceof Client) {
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return new FacebookGuzzleHttpClient($handler);
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}
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if ('guzzle' === $handler) {
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return new FacebookGuzzleHttpClient();
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}
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throw new InvalidArgumentException('The http client handler must be set to "curl", "stream", "guzzle", be an instance of GuzzleHttp\Client or an instance of Facebook\HttpClients\FacebookHttpClientInterface');
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}
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/**
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* Detect default HTTP client.
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*
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* @return FacebookHttpClientInterface
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*/
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private static function detectDefaultClient()
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{
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if (extension_loaded('curl')) {
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return new FacebookCurlHttpClient();
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}
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if (class_exists('GuzzleHttp\Client')) {
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return new FacebookGuzzleHttpClient();
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}
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return new FacebookStreamHttpClient();
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}
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}
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