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