Actualización

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookCurl.php

@@ -0,0 +1,129 @@
+<?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;
+
+/**
+ * Class FacebookCurl
+ *
+ * Abstraction for the procedural curl elements so that curl can be mocked and the implementation can be tested.
+ *
+ * @package Facebook
+ */
+class FacebookCurl
+{
+
+    /**
+     * @var resource Curl resource instance
+     */
+    protected $curl;
+
+    /**
+     * Make a new curl reference instance
+     */
+    public function init()
+    {
+        $this->curl = curl_init();
+    }
+
+    /**
+     * Set a curl option
+     *
+     * @param $key
+     * @param $value
+     */
+    public function setopt($key, $value)
+    {
+        curl_setopt($this->curl, $key, $value);
+    }
+
+    /**
+     * Set an array of options to a curl resource
+     *
+     * @param array $options
+     */
+    public function setoptArray(array $options)
+    {
+        curl_setopt_array($this->curl, $options);
+    }
+
+    /**
+     * Send a curl request
+     *
+     * @return mixed
+     */
+    public function exec()
+    {
+        return curl_exec($this->curl);
+    }
+
+    /**
+     * Return the curl error number
+     *
+     * @return int
+     */
+    public function errno()
+    {
+        return curl_errno($this->curl);
+    }
+
+    /**
+     * Return the curl error message
+     *
+     * @return string
+     */
+    public function error()
+    {
+        return curl_error($this->curl);
+    }
+
+    /**
+     * Get info from a curl reference
+     *
+     * @param $type
+     *
+     * @return mixed
+     */
+    public function getinfo($type)
+    {
+        return curl_getinfo($this->curl, $type);
+    }
+
+    /**
+     * Get the currently installed curl version
+     *
+     * @return array
+     */
+    public function version()
+    {
+        return curl_version();
+    }
+
+    /**
+     * Close the resource connection to curl
+     */
+    public function close()
+    {
+        curl_close($this->curl);
+    }
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookCurlHttpClient.php

@@ -0,0 +1,163 @@
+<?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 Facebook\Http\GraphRawResponse;
+use Facebook\Exceptions\FacebookSDKException;
+
+/**
+ * Class FacebookCurlHttpClient
+ *
+ * @package Facebook
+ */
+class FacebookCurlHttpClient implements FacebookHttpClientInterface
+{
+    /**
+     * @var string The client error message
+     */
+    protected $curlErrorMessage = '';
+
+    /**
+     * @var int The curl client error code
+     */
+    protected $curlErrorCode = 0;
+
+    /**
+     * @var string|boolean The raw response from the server
+     */
+    protected $rawResponse;
+
+    /**
+     * @var FacebookCurl Procedural curl as object
+     */
+    protected $facebookCurl;
+
+    /**
+     * @param FacebookCurl|null Procedural curl as object
+     */
+    public function __construct(FacebookCurl $facebookCurl = null)
+    {
+        $this->facebookCurl = $facebookCurl ?: new FacebookCurl();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function send($url, $method, $body, array $headers, $timeOut)
+    {
+        $this->openConnection($url, $method, $body, $headers, $timeOut);
+        $this->sendRequest();
+
+        if ($curlErrorCode = $this->facebookCurl->errno()) {
+            throw new FacebookSDKException($this->facebookCurl->error(), $curlErrorCode);
+        }
+
+        // Separate the raw headers from the raw body
+        list($rawHeaders, $rawBody) = $this->extractResponseHeadersAndBody();
+
+        $this->closeConnection();
+
+        return new GraphRawResponse($rawHeaders, $rawBody);
+    }
+
+    /**
+     * Opens a new curl connection.
+     *
+     * @param string $url     The endpoint to send the request to.
+     * @param string $method  The request method.
+     * @param string $body    The body of the request.
+     * @param array  $headers The request headers.
+     * @param int    $timeOut The timeout in seconds for the request.
+     */
+    public function openConnection($url, $method, $body, array $headers, $timeOut)
+    {
+        $options = [
+            CURLOPT_CUSTOMREQUEST => $method,
+            CURLOPT_HTTPHEADER => $this->compileRequestHeaders($headers),
+            CURLOPT_URL => $url,
+            CURLOPT_CONNECTTIMEOUT => 10,
+            CURLOPT_TIMEOUT => $timeOut,
+            CURLOPT_RETURNTRANSFER => true, // Return response as string
+            CURLOPT_HEADER => true, // Enable header processing
+            CURLOPT_SSL_VERIFYHOST => 2,
+            CURLOPT_SSL_VERIFYPEER => true,
+            CURLOPT_CAINFO => __DIR__ . '/certs/DigiCertHighAssuranceEVRootCA.pem',
+        ];
+
+        if ($method !== "GET") {
+            $options[CURLOPT_POSTFIELDS] = $body;
+        }
+
+        $this->facebookCurl->init();
+        $this->facebookCurl->setoptArray($options);
+    }
+
+    /**
+     * Closes an existing curl connection
+     */
+    public function closeConnection()
+    {
+        $this->facebookCurl->close();
+    }
+
+    /**
+     * Send the request and get the raw response from curl
+     */
+    public function sendRequest()
+    {
+        $this->rawResponse = $this->facebookCurl->exec();
+    }
+
+    /**
+     * Compiles the request headers into a curl-friendly format.
+     *
+     * @param array $headers The request headers.
+     *
+     * @return array
+     */
+    public function compileRequestHeaders(array $headers)
+    {
+        $return = [];
+
+        foreach ($headers as $key => $value) {
+            $return[] = $key . ': ' . $value;
+        }
+
+        return $return;
+    }
+
+    /**
+     * Extracts the headers and the body into a two-part array
+     *
+     * @return array
+     */
+    public function extractResponseHeadersAndBody()
+    {
+        $parts = explode("\r\n\r\n", $this->rawResponse);
+        $rawBody = array_pop($parts);
+        $rawHeaders = implode("\r\n\r\n", $parts);
+
+        return [trim($rawHeaders), trim($rawBody)];
+    }
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookGuzzleHttpClient.php

@@ -0,0 +1,97 @@
+<?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 Facebook\Http\GraphRawResponse;
+use Facebook\Exceptions\FacebookSDKException;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\Message\ResponseInterface;
+use GuzzleHttp\Ring\Exception\RingException;
+use GuzzleHttp\Exception\RequestException;
+
+class FacebookGuzzleHttpClient implements FacebookHttpClientInterface
+{
+    /**
+     * @var \GuzzleHttp\Client The Guzzle client.
+     */
+    protected $guzzleClient;
+
+    /**
+     * @param \GuzzleHttp\Client|null The Guzzle client.
+     */
+    public function __construct(Client $guzzleClient = null)
+    {
+        $this->guzzleClient = $guzzleClient ?: new Client();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function send($url, $method, $body, array $headers, $timeOut)
+    {
+        $options = [
+            'headers' => $headers,
+            'body' => $body,
+            'timeout' => $timeOut,
+            'connect_timeout' => 10,
+            'verify' => __DIR__ . '/certs/DigiCertHighAssuranceEVRootCA.pem',
+        ];
+        $request = $this->guzzleClient->createRequest($method, $url, $options);
+
+        try {
+            $rawResponse = $this->guzzleClient->send($request);
+        } catch (RequestException $e) {
+            $rawResponse = $e->getResponse();
+
+            if ($e->getPrevious() instanceof RingException || !$rawResponse instanceof ResponseInterface) {
+                throw new FacebookSDKException($e->getMessage(), $e->getCode());
+            }
+        }
+
+        $rawHeaders = $this->getHeadersAsString($rawResponse);
+        $rawBody = $rawResponse->getBody();
+        $httpStatusCode = $rawResponse->getStatusCode();
+
+        return new GraphRawResponse($rawHeaders, $rawBody, $httpStatusCode);
+    }
+
+    /**
+     * Returns the Guzzle array of headers as a string.
+     *
+     * @param ResponseInterface $response The Guzzle response.
+     *
+     * @return string
+     */
+    public function getHeadersAsString(ResponseInterface $response)
+    {
+        $headers = $response->getHeaders();
+        $rawHeaders = [];
+        foreach ($headers as $name => $values) {
+            $rawHeaders[] = $name . ": " . implode(", ", $values);
+        }
+
+        return implode("\r\n", $rawHeaders);
+    }
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookHttpClientInterface.php

@@ -0,0 +1,47 @@
+<?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;
+
+/**
+ * Interface FacebookHttpClientInterface
+ *
+ * @package Facebook
+ */
+interface FacebookHttpClientInterface
+{
+    /**
+     * Sends a request to the server and returns the raw response.
+     *
+     * @param string $url     The endpoint to send the request to.
+     * @param string $method  The request method.
+     * @param string $body    The body of the request.
+     * @param array  $headers The request headers.
+     * @param int    $timeOut The timeout in seconds for the request.
+     *
+     * @return \Facebook\Http\GraphRawResponse Raw response from the server.
+     *
+     * @throws \Facebook\Exceptions\FacebookSDKException
+     */
+    public function send($url, $method, $body, array $headers, $timeOut);
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookStream.php

@@ -0,0 +1,80 @@
+<?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;
+
+/**
+ * Class FacebookStream
+ *
+ * Abstraction for the procedural stream elements so that the functions can be
+ * mocked and the implementation can be tested.
+ *
+ * @package Facebook
+ */
+class FacebookStream
+{
+    /**
+     * @var resource Context stream resource instance
+     */
+    protected $stream;
+
+    /**
+     * @var array Response headers from the stream wrapper
+     */
+    protected $responseHeaders = [];
+
+    /**
+     * Make a new context stream reference instance
+     *
+     * @param array $options
+     */
+    public function streamContextCreate(array $options)
+    {
+        $this->stream = stream_context_create($options);
+    }
+
+    /**
+     * The response headers from the stream wrapper
+     *
+     * @return array
+     */
+    public function getResponseHeaders()
+    {
+        return $this->responseHeaders;
+    }
+
+    /**
+     * Send a stream wrapped request
+     *
+     * @param string $url
+     *
+     * @return mixed
+     */
+    public function fileGetContents($url)
+    {
+        $rawResponse = file_get_contents($url, false, $this->stream);
+        $this->responseHeaders = $http_response_header ?: [];
+
+        return $rawResponse;
+    }
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/FacebookStreamHttpClient.php

@@ -0,0 +1,94 @@
+<?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 Facebook\Http\GraphRawResponse;
+use Facebook\Exceptions\FacebookSDKException;
+
+class FacebookStreamHttpClient implements FacebookHttpClientInterface
+{
+    /**
+     * @var FacebookStream Procedural stream wrapper as object.
+     */
+    protected $facebookStream;
+
+    /**
+     * @param FacebookStream|null Procedural stream wrapper as object.
+     */
+    public function __construct(FacebookStream $facebookStream = null)
+    {
+        $this->facebookStream = $facebookStream ?: new FacebookStream();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function send($url, $method, $body, array $headers, $timeOut)
+    {
+        $options = [
+            'http' => [
+                'method' => $method,
+                'header' => $this->compileHeader($headers),
+                'content' => $body,
+                'timeout' => $timeOut,
+                'ignore_errors' => true
+            ],
+            'ssl' => [
+                'verify_peer' => true,
+                'verify_peer_name' => true,
+                'allow_self_signed' => true, // All root certificates are self-signed
+                'cafile' => __DIR__ . '/certs/DigiCertHighAssuranceEVRootCA.pem',
+            ],
+        ];
+
+        $this->facebookStream->streamContextCreate($options);
+        $rawBody = $this->facebookStream->fileGetContents($url);
+        $rawHeaders = $this->facebookStream->getResponseHeaders();
+
+        if ($rawBody === false || empty($rawHeaders)) {
+            throw new FacebookSDKException('Stream returned an empty response', 660);
+        }
+
+        $rawHeaders = implode("\r\n", $rawHeaders);
+
+        return new GraphRawResponse($rawHeaders, $rawBody);
+    }
+
+    /**
+     * Formats the headers for use in the stream wrapper.
+     *
+     * @param array $headers The request headers.
+     *
+     * @return string
+     */
+    public function compileHeader(array $headers)
+    {
+        $header = [];
+        foreach ($headers as $k => $v) {
+            $header[] = $k . ': ' . $v;
+        }
+
+        return implode("\r\n", $header);
+    }
+}

vendor/facebook/php-sdk-v4/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();
+    }
+}

vendor/facebook/php-sdk-v4/src/Facebook/HttpClients/certs/DigiCertHighAssuranceEVRootCA.pem

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----