diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index a7e04f2c5..61ed3ce1c 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.1.14",
+    "version": "3.1.15",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 9d57e7b67..b7248b128 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -18,6 +18,33 @@ import user from '../model/user';
 import {
     Handler, param, Route, Types,
 } from '../service/server';
+import { registerResolver, registerValue } from './api';
+
+registerValue('Contest', [
+    ['_id', 'ObjectID!'],
+    ['domainId', 'String!'],
+    ['docId', 'ObjectID!'],
+    ['owner', 'Int!'],
+    ['beginAt', 'Date!'],
+    ['title', 'String!'],
+    ['content', 'String!'],
+    ['beginAt', 'Date!'],
+    ['endAt', 'Date!'],
+    ['attend', 'Int!'],
+    ['pids', '[Int]!'],
+    ['rated', 'Boolean!'],
+]);
+
+registerResolver(
+    'Query', 'contest(id: ObjectID!)', 'Contest',
+    async (arg, ctx) => {
+        arg.id = new ObjectID(arg.id);
+        ctx.tdoc = await contest.get(ctx.domainId, new ObjectID(arg.id));
+        if (!ctx.tdoc) throw new ContestNotFoundError(ctx.domainId, arg.id);
+        return ctx.tdoc;
+    },
+    'Get a contest by ID',
+);
 
 export class ContestListHandler extends Handler {
     @param('rule', Types.Range(contest.RULES), true)
diff --git a/packages/hydrooj/src/handler/misc.ts b/packages/hydrooj/src/handler/misc.ts
index 8e7fac3ef..eec805dec 100644
--- a/packages/hydrooj/src/handler/misc.ts
+++ b/packages/hydrooj/src/handler/misc.ts
@@ -106,7 +106,7 @@ export class FSDownloadHandler extends Handler {
             this.response.etag = file.etag;
             this.response.body = await storage.get(target);
             this.response.type = file['Content-Type'] || type;
-            this.response.disposition = `attachment; filename=${encodeURIComponent(filename)}`;
+            if (!noDisposition) this.response.disposition = `attachment; filename=${encodeURIComponent(filename)}`;
         } else {
             this.response.redirect = await storage.signDownloadLink(
                 target, noDisposition ? undefined : filename, false, 'user',
diff --git a/packages/ui-default/entry.js b/packages/ui-default/entry.js
index 59f9018f7..d05984d7f 100644
--- a/packages/ui-default/entry.js
+++ b/packages/ui-default/entry.js
@@ -23,8 +23,8 @@ console.log(
 document.addEventListener('DOMContentLoaded', () => {
   window.UiContext = JSON.parse(window.UiContext);
 
-  // eslint-disable-next-line
-  try { __webpack_public_path__ = UiContext.cdn_prefix } catch (e) { }
+  // eslint-disable-next-line camelcase
+  try { __webpack_public_path__ = UiContext.cdn_prefix; } catch (e) { }
 
   // Locale & langs
   const { version, payload } = JSON.parse(localStorage.getItem('hydro-constant') || '{}');
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index db13e8d46..4502d0244 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.26.8",
+  "version": "4.26.9",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/pages/api.page.tsx b/packages/ui-default/pages/api.page.tsx
index 6583d6f4e..23e7874b5 100644
--- a/packages/ui-default/pages/api.page.tsx
+++ b/packages/ui-default/pages/api.page.tsx
@@ -26,7 +26,7 @@ const page = new NamedPage('api', async () => {
       defaultQuery={defaultQuery}
       fetcher={async (graphQLParams) => {
         const data = await fetch(
-          '/api',
+          '',
           {
             method: 'POST',
             headers: {