diff --git a/packages/hydrojudge/src/hosts/hydro.ts b/packages/hydrojudge/src/hosts/hydro.ts
index 409b196fe..94a20ebb9 100644
--- a/packages/hydrojudge/src/hosts/hydro.ts
+++ b/packages/hydrojudge/src/hosts/hydro.ts
@@ -125,7 +125,7 @@ export default class Hydro implements Session {
 
     async fetchFile(name: string) {
         name = name.split('#')[0];
-        const res = await this.post('judge/code', { id: name });
+        const res = await this.post('judge/files', { id: name });
         const target = path.join(getConfig('tmp_dir'), name.replace(/\//g, '_'));
         const w = fs.createWriteStream(target);
         this.get(res.body.url).pipe(w);
diff --git a/packages/hydrooj/src/handler/judge.ts b/packages/hydrooj/src/handler/judge.ts
index 1a4f45ed9..d4b79c3fc 100644
--- a/packages/hydrooj/src/handler/judge.ts
+++ b/packages/hydrooj/src/handler/judge.ts
@@ -153,9 +153,14 @@ export class JudgeFilesDownloadHandler extends Handler {
     }
 
     noCheckPermView = true;
-    @post('files', Types.Set)
-    @post('pid', Types.UnsignedInt)
-    async post(domainId: string, files: Set<string>, pid: number) {
+    @post('id', Types.String, true)
+    @post('files', Types.Set, true)
+    @post('pid', Types.UnsignedInt, true)
+    async post(domainId: string, id: string, files: Set<string>, pid: number) {
+        if (id) {
+            this.response.body = { url: await storage.signDownloadLink(`submission/${id}`, 'code', true, 'judge') };
+            return;
+        }
         const pdoc = await problem.get(domainId, pid);
         if (!pdoc) this.response.body.links = null;
         const links = {};
@@ -170,13 +175,6 @@ export class JudgeFilesDownloadHandler extends Handler {
     }
 }
 
-export class SubmissionDataDownloadHandler extends Handler {
-    @post('id', Types.String)
-    async post(domainId: string, id: string) {
-        this.response.body = { url: await storage.signDownloadLink(`submission/${id}`, 'code', true, 'judge') };
-    }
-}
-
 export async function processJudgeFileCallback(rid: ObjectId, filename: string, filePath: string) {
     const rdoc = await record.get(rid);
     const [pdoc, udoc] = await Promise.all([
@@ -301,7 +299,6 @@ class JudgeConnectionHandler extends ConnectionHandler {
 export async function apply(ctx) {
     ctx.Route('judge_files_download', '/judge/files', JudgeFilesDownloadHandler, builtin.PRIV.PRIV_JUDGE);
     ctx.Route('judge_files_upload', '/judge/upload', JudgeFileUpdateHandler, builtin.PRIV.PRIV_JUDGE);
-    ctx.Route('judge_submission_download', '/judge/code', SubmissionDataDownloadHandler, builtin.PRIV.PRIV_JUDGE);
     ctx.Connection('judge_conn', '/judge/conn', JudgeConnectionHandler, builtin.PRIV.PRIV_JUDGE);
 }
 
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index eb0e660f2..efc8cc7e0 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -87,7 +87,7 @@ export interface KoaContext extends Koa.Context {
     request: Koa.Request & { body: any, files: Files };
     session: Record<string, any>;
     render: (name: string, args: any) => Promise<void>;
-    renderHTML: (name: string, args: any) => Promise<string>;
+    renderHTML: (name: string, args: any) => string | Promise<string>;
     getUrl: (name: string, args: any) => string;
     translate: (key: string) => string;
 }