1<?php
2/**
3 * Copyright 2017 Facebook, Inc.
4 *
5 * You are hereby granted a non-exclusive, worldwide, royalty-free license to
6 * use, copy, modify, and distribute this software in source code or binary
7 * form for use in connection with the web services and APIs provided by
8 * Facebook.
9 *
10 * As with any software that integrates with the Facebook platform, your use
11 * of this software is subject to the Facebook Developer Principles and
12 * Policies [http://developers.facebook.com/policy/]. This copyright notice
13 * shall be included in all copies or substantial portions of the software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 */
24namespace Facebook\HttpClients;
25
26use Facebook\Http\GraphRawResponse;
27use Facebook\Exceptions\FacebookSDKException;
28
29class FacebookStreamHttpClient implements FacebookHttpClientInterface
30{
31    /**
32     * @var FacebookStream Procedural stream wrapper as object.
33     */
34    protected $facebookStream;
35
36    /**
37     * @param FacebookStream|null Procedural stream wrapper as object.
38     */
39    public function __construct(FacebookStream $facebookStream = null)
40    {
41        $this->facebookStream = $facebookStream ?: new FacebookStream();
42    }
43
44    /**
45     * @inheritdoc
46     */
47    public function send($url, $method, $body, array $headers, $timeOut)
48    {
49        $options = [
50            'http' => [
51                'method' => $method,
52                'header' => $this->compileHeader($headers),
53                'content' => $body,
54                'timeout' => $timeOut,
55                'ignore_errors' => true
56            ],
57            'ssl' => [
58                'verify_peer' => true,
59                'verify_peer_name' => true,
60                'allow_self_signed' => true, // All root certificates are self-signed
61                'cafile' => __DIR__ . '/certs/DigiCertHighAssuranceEVRootCA.pem',
62            ],
63        ];
64
65        $this->facebookStream->streamContextCreate($options);
66        $rawBody = $this->facebookStream->fileGetContents($url);
67        $rawHeaders = $this->facebookStream->getResponseHeaders();
68
69        if ($rawBody === false || empty($rawHeaders)) {
70            throw new FacebookSDKException('Stream returned an empty response', 660);
71        }
72
73        $rawHeaders = implode("\r\n", $rawHeaders);
74
75        return new GraphRawResponse($rawHeaders, $rawBody);
76    }
77
78    /**
79     * Formats the headers for use in the stream wrapper.
80     *
81     * @param array $headers The request headers.
82     *
83     * @return string
84     */
85    public function compileHeader(array $headers)
86    {
87        $header = [];
88        foreach ($headers as $k => $v) {
89            $header[] = $k . ': ' . $v;
90        }
91
92        return implode("\r\n", $header);
93    }
94}
95