add server-side guard to avoid message parser when setting value is exceeded

Author: nazabucciarelli

apps/meteor/server/services/messages/hooks/BeforeSaveMarkdownParser.ts

@@ -2,6 +2,8 @@ import { isE2EEMessage } from '@rocket.chat/core-typings';
 import type { IMessage } from '@rocket.chat/core-typings';
 import { parse } from '@rocket.chat/message-parser';
 
+import { settings } from '../../../../app/settings/server';
+
 type ParserConfig = {
 	colors?: boolean;
 	emoticons?: boolean;
@@ -26,6 +28,11 @@ export class BeforeSaveMarkdownParser {
 			return message;
 		}
 
+		const maxParseLength = settings.get<number>('Message_MaxMarkdownParseLength');
+		if (maxParseLength > 0 && message.msg && message.msg.length > maxParseLength) {
+			return message;
+		}
+
 		try {
 			if (message.msg) {
 				message.md = parse(message.msg, config);