-
Notifications
You must be signed in to change notification settings - Fork 0
/
posthook.php
157 lines (129 loc) · 4.08 KB
/
posthook.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
<?php
/**
* Created by PhpStorm.
* User: raz
* Date: 2019-02-07
* Time: 15:40
*/
require_once('./config.php');
require_once( './lib.php');
$queries = array();
parse_str($_SERVER['QUERY_STRING'], $queries);
$ops = get_option('mfn-wp-plugin');
$subscriptions = get_option("mfn-subscriptions");
$plugin_url = mfn_plugin_url();
$subscription = mfn_get_subscription_by_plugin_url($subscriptions, $plugin_url);
if (!isset($subscription)) {
http_response_code(400);
die("subscription doesn't exist");
}
if ( !isset($queries["wp-name"]) ) {
http_response_code(400);
die("wp-name must be provided");
}
if ( !isset($subscription['posthook_name']) ) {
http_response_code(400);
die("posthook name must exist in settings");
}
$posthook_name = $subscription['posthook_name'];
$wp_name = $queries["wp-name"];
if ($posthook_name != $wp_name) {
http_response_code(400);
die("post hook name must be the same as in settings");
}
// Verifying intent
if ($_SERVER['REQUEST_METHOD'] == 'GET')
{
if (!isset($queries["hub_mode"])) {
http_response_code(400);
die("mode must be set");
}
$mode = $queries["hub_mode"];
if ($mode != 'subscribe' && $mode != 'unsubscribe' && $mode != 'status') {
http_response_code(400);
die("mode must be subscribe or unsubscribe");
}
if (!isset($queries["hub_challenge"])) {
http_response_code(400);
die("challenge must be set");
}
$challenge = $queries["hub_challenge"];
if (!isset($queries["hub_topic"])) {
http_response_code(400);
die("topic topic be set");
}
$topic = $queries["hub_topic"];
if ($mode != 'status') {
// status should not write anything, just a healthcheck
mfn_update_challenge_by_plugin_url($subscriptions, $plugin_url, $challenge);
}
http_response_code(200);
echo $challenge;
die();
}
// Begin receiving content
$method = $_SERVER['REQUEST_METHOD'];
if ($method !== 'POST' && $method !== 'PUT' && $method !== 'DELETE') {
http_response_code(400);
echo "bad method";
die();
}
$signature = null;
if (isset($_SERVER['HTTP_X_HUB_SIGNATURE'])) {
$signature = $_SERVER['HTTP_X_HUB_SIGNATURE'];
}
$hub_ext_ping = null;
if (isset($_SERVER['HTTP_X_HUB_EXT_PING'])) {
$hub_ext_ping = $_SERVER['HTTP_X_HUB_EXT_PING'];
}
$is_ping = isset($hub_ext_ping) && (strtolower($hub_ext_ping) === 'true' || $hub_ext_ping === '1');
$content = file_get_contents("php://input");
if (!$is_ping) {
do_action( 'mfn_before_posthook', $content);
}
$verify_signature = $ops['verify_signature'] ?? 'off';
$reset_cache = isset($ops['reset_cache']) && $ops['reset_cache'] == 'on';
if ($verify_signature == 'on') {
$parts = explode('=', $signature);
$alg = $parts[0];
$hmac = $parts[1];
$key = $subscription['posthook_secret'];
$res = hash_hmac($alg, $content, $key);
if ($hmac != $res) {
error_log("[MFN Post hook]: hmac: " . $hmac . " that was provided but does not match expected value");
http_response_code(400);
echo "could not verify hmac as correct";
die();
}
}
$news_item = json_decode($content);
if ($is_ping) {
list ($pingResponse, $pingSignatureHeader, $err) = mfn_verify_ping_item($subscription, $method, $news_item);
if ($pingResponse) {
if ($pingSignatureHeader) {
header('X-Hub-Signature:' . $pingSignatureHeader);
}
echo $pingResponse;
die();
} else {
http_response_code(400);
echo "could not verify ping: " . $err;
die();
}
}
if (isset($news_item->properties) && isset($news_item->properties->type) && $news_item->properties->type === 'ping') {
http_response_code(500);
echo "ping item, but incorrect X-Hub-Ext-Ping header";
die();
}
if ($method == 'DELETE') {
if (!isset($news_item->news_id)) {
http_response_code(400);
echo "delete request without news_id";
die();
}
mfn_unpublish_item($news_item->news_id);
} else {
mfn_upsert_item_full($news_item, $signature, $content, $reset_cache);
do_action( 'mfn_after_posthook', $news_item);
}