core: 自动语言识别

packages/hydrooj/src/service/server.ts

@@ -527,6 +527,9 @@ export class Handler extends HandlerCommon {
             this.session.scope = PERM.PERM_ALL.toString();
             this.user = await user.getById(domainId, this.session.uid, this.session.scope);
         }
+        if (!this.session._id && this.request.headers['accept-language'] && !this.request.headers['accept-language'].startsWith('zh')) {
+            this.session.viewLang = 'en';
+        }
         if (this.user._id === 0 && this.session.viewLang) this.user.viewLang = this.session.viewLang;
         this.user.avatarUrl = avatar(this.user.avatar, 128);
         this.csrfToken = this.getCsrfToken(this.session._id || String.random(32));