Add setting to change User Agent of OEmbed calls

packages/rocketchat-i18n/i18n/en.i18n.json

@@ -178,6 +178,7 @@
   "API_Drupal_URL": "Drupal Server URL",
   "API_Drupal_URL_Description": "Example: https://domain.com (excluding trailing slash)",
   "API_Embed": "Embed Link Previews",
+  "API_Embed_UserAgent": "Embed request user agent",
   "API_Embed_Description": "Whether embedded link previews are enabled or not when a user posts a link to a website.",
   "API_EmbedCacheExpirationDays": "Embed cache expiration days",
   "API_EmbedDisabledFor": "Disable Embed for Users",

packages/rocketchat-lib/server/startup/settings.js

@@ -789,6 +789,10 @@ RocketChat.settings.addGroup('Message', function() {
 		type: 'boolean',
 		'public': true
 	});
+	this.add('API_Embed_UserAgent', 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36', {
+		type: 'string',
+		'public': true
+	});
 	this.add('API_EmbedCacheExpirationDays', 30, {
 		type: 'int',
 		'public': false

packages/rocketchat-oembed/server/server.js

@@ -88,7 +88,7 @@ const getUrlContent = function(urlObj, redirectCount = 5, callback) {
 		gzip: true,
 		maxRedirects: redirectCount,
 		headers: {
-			'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36'
+			'User-Agent': RocketChat.settings.get('API_Embed_UserAgent')
 		}
 	};
 	let headers = null;