From 8c2442eca5889a5ece659bdb456403b28285b26b Mon Sep 17 00:00:00 2001
From: Mario <mario@mariovavti.com>
Date: Thu, 28 Jan 2021 14:57:37 +0000
Subject: AS channel discovery with custom access header

---
 Zotlabs/Module/Channel.php | 40 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

(limited to 'Zotlabs/Module/Channel.php')

diff --git a/Zotlabs/Module/Channel.php b/Zotlabs/Module/Channel.php
index 11f4d3a52..5cfcb623b 100644
--- a/Zotlabs/Module/Channel.php
+++ b/Zotlabs/Module/Channel.php
@@ -4,10 +4,12 @@ namespace Zotlabs\Module;
 
 
 use App;
-use Zotlabs\Web\Controller;
+use Zotlabs\Lib\Activity;
+use Zotlabs\Lib\ActivityStreams;
+use Zotlabs\Lib\Libzot;
 use Zotlabs\Lib\PermissionDescription;
+use Zotlabs\Web\Controller;
 use Zotlabs\Web\HTTPSig;
-use Zotlabs\Lib\Libzot;
 
 require_once('include/items.php');
 require_once('include/security.php');
@@ -25,7 +27,7 @@ class Channel extends Controller {
 
 	function init() {
 
-		if(in_array(substr($_GET['search'],0,1),[ '@', '!', '?']))
+		if(in_array(substr($_GET['search'],0,1),[ '@', '!', '?']) || strpos($_GET['search'], 'https://') === 0)
 			goaway('search' . '?f=&search=' . $_GET['search']);
 
 		$which = null;
@@ -87,6 +89,38 @@ class Channel extends Controller {
 			killme();
 		}
 
+		if (ActivityStreams::is_as_request($channel)) {
+
+			// Somebody may attempt an ActivityStreams fetch on one of our message permalinks
+			// Make it do the right thing.
+
+			$mid = ((x($_REQUEST,'mid')) ? $_REQUEST['mid'] : '');
+			if ($mid && strpos($mid,'b64.') === 0) {
+				$decoded = @base64url_decode(substr($mid,4));
+				if ($decoded) {
+					$mid = $decoded;
+				}
+			}
+			if ($mid) {
+				$obj = null;
+				if (strpos($mid, z_root() . '/item/') === 0) {
+					App::$argc = 2;
+					App::$argv = [ 'item', basename($mid) ];
+					$obj = new Item();
+				}
+				if (strpos($mid, z_root() . '/activity/') === 0) {
+					App::$argc = 2;
+					App::$argv = [ 'activity', basename($mid) ];
+					$obj = new Activity();
+				}
+				if ($obj) {
+					$obj->init();
+				}
+			}
+
+			as_return_and_die(Activity::encode_person($channel,true),$channel);
+		}
+
 		if((local_channel()) && (argc() > 2) && (argv(2) === 'view')) {
 			$which = $channel['channel_address'];
 			$profile = argv(1);
-- 
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