From 74a774e8e7a13d8c87e1dcde71c25ce60455aec3 Mon Sep 17 00:00:00 2001
From: Matt Wiebe <wiebe@automattic.com>
Date: Wed, 1 Nov 2023 10:53:27 -0500
Subject: [PATCH] Hashtags: 1MB limit for attempting to link (#544)

---
 includes/class-hashtag.php | 4 ++++
 readme.txt                 | 1 +
 2 files changed, 5 insertions(+)

diff --git a/includes/class-hashtag.php b/includes/class-hashtag.php
index 2d03ac4..6031d1f 100644
--- a/includes/class-hashtag.php
+++ b/includes/class-hashtag.php
@@ -43,6 +43,10 @@ class Hashtag {
 	 * @return string the filtered post-content
 	 */
 	public static function the_content( $the_content ) {
+		// small protection against execution timeouts: limit to 1 MB
+		if ( mb_strlen( $the_content ) > MB_IN_BYTES ) {
+			return $the_content;
+		}
 		$tag_stack = array();
 		$protected_tags = array(
 			'pre',
diff --git a/readme.txt b/readme.txt
index ec1af3b..5a70498 100644
--- a/readme.txt
+++ b/readme.txt
@@ -110,6 +110,7 @@ Project maintained on GitHub at [automattic/wordpress-activitypub](https://githu
 * Improved: audio and video attachments are now supported!
 * Improved: better error messages if remote profile is not accessible
 * Improved: PHP 8.1 compatibility
+* Fixed: don't try to parse mentions or hashtags for very large (>1MB) posts to prevent timeouts
 
 = 1.0.10 =