1 files changed, 99 insertions, 0 deletions
diff --git a/lib/facebook-graph-sdk/src/Facebook/HttpClients/HttpClientsFactory.php b/lib/facebook-graph-sdk/src/Facebook/HttpClients/HttpClientsFactory.php
new file mode 100644
index 0000000..d9f2a8d
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+++ b/lib/facebook-graph-sdk/src/Facebook/HttpClients/HttpClientsFactory.php
@@ -0,0 +1,99 @@
+<?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();
+    }
+}