From ae5dc795c3757800382d1806132db02398386514 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bar=C4=B1=C5=9F=20Soner=20U=C5=9Fakl=C4=B1?=
 <baris@nodebb.org>
Date: Fri, 8 Dec 2017 11:23:47 -0500
Subject: [PATCH] #5824

---
 src/controllers/topics.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/controllers/topics.js b/src/controllers/topics.js
index c75f5c3602..4c57d90296 100644
--- a/src/controllers/topics.js
+++ b/src/controllers/topics.js
@@ -288,6 +288,26 @@ function addTags(topicData, req, res) {
 		},
 	];
 
+	var regex = /src\s*=\s*"(.+?)"/g;
+
+	topicData.posts.forEach(function (postData) {
+		var match = regex.exec(postData.content);
+		if (match) {
+			var image = match[1];
+			if (image.startsWith(nconf.get('url') + '/plugins')) {
+				return;
+			}
+			var data = {
+				property: 'og:image',
+				content: image,
+				noEscape: true,
+			};
+			res.locals.metaTags.push(data);
+			data.property = 'og:image:url';
+			res.locals.metaTags.push(data);
+		}
+	});
+
 	res.locals.linkTags = [
 		{
 			rel: 'alternate',