From 0d9209a74bffff8f9a025cf7fb03d5265293f0b9 Mon Sep 17 00:00:00 2001
From: Hypolite Petovan <hypolite@mrpetovan.com>
Date: Tue, 22 Jan 2019 12:15:42 -0500
Subject: [PATCH] Add AP Inbox logging back with config

---
 config/defaults.config.php |  5 +++++
 src/Module/Inbox.php       | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/config/defaults.config.php b/config/defaults.config.php
index 90596a8fee..f16bd664cf 100644
--- a/config/defaults.config.php
+++ b/config/defaults.config.php
@@ -421,4 +421,9 @@ return [
 		// Must be writable by the ejabberd process. if set then it will prevent the running of multiple processes.
 		'lockpath' => '',
 	],
+    'debug' => [
+        // ap_inbox_log (Boolean)
+        // Logs every call to /inbox as a JSON file in Friendica's temporary directory
+        'ap_inbox_log' => false,
+    ]
 ];
diff --git a/src/Module/Inbox.php b/src/Module/Inbox.php
index e955f11a36..5fc1b15f1a 100644
--- a/src/Module/Inbox.php
+++ b/src/Module/Inbox.php
@@ -8,6 +8,7 @@ use Friendica\BaseModule;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
+use Friendica\Util\HTTPSignature;
 
 /**
  * ActivityPub Inbox
@@ -24,6 +25,17 @@ class Inbox extends BaseModule
 			System::httpExit(400);
 		}
 
+		if (Config::get('debug', 'ap_inbox_log')) {
+            if (HTTPSignature::getSigner($postdata, $_SERVER)) {
+                $filename = 'signed-activitypub';
+            } else {
+                $filename = 'failed-activitypub';
+            }
+            $tempfile = tempnam(get_temppath(), $filename);
+            file_put_contents($tempfile, json_encode(['argv' => $a->argv, 'header' => $_SERVER, 'body' => $postdata], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
+            Logger::log('Incoming message stored under ' . $tempfile);
+        }
+
 		if (!empty($a->argv[1])) {
 			$user = DBA::selectFirst('user', ['uid'], ['nickname' => $a->argv[1]]);
 			if (!DBA::isResult($user)) {