Use proxy instead of weserv for url-preview images (#4466)

src/server/web/url-preview.ts

@@ -3,6 +3,8 @@ import * as request from 'request-promise-native';
 import summaly from 'summaly';
 import fetchMeta from '../../misc/fetch-meta';
 import Logger from '../../services/logger';
+import config from '../../config';
+import { query } from '../../prelude/url';
 
 const logger = new Logger('url-preview');
 
@@ -44,7 +46,10 @@ module.exports = async (ctx: Koa.BaseContext) => {
 function wrap(url: string): string {
 	return url != null
 		? url.match(/^https?:\/\//)
-			? `https://images.weserv.nl/?url=${encodeURIComponent(url.replace(/^http:\/\//, '').replace(/^https:\/\//, 'ssl:'))}&w=200&h=200`
+			? `${config.url}/proxy/preview.jpg?${query({
+				url,
+				preview: '1'
+			})}`
 			: url
 		: null;
 }