judge: add getFile()

packages/hydrojudge/src/judge/default.ts

@@ -53,9 +53,7 @@ function judgeCase(c: NormalizedCase) {
             if (code < 32) message = signals[code];
             else message = { message: 'Your program returned {0}.', params: [code] };
         }
-        await Promise.all(
-            Object.values(res.fileIds).map((id) => del(id)),
-        ).catch(() => { /* Ignore file doesn't exist */ });
+        await Promise.allSettled(Object.values(res.fileIds).map((id) => del(id)));
         if (runner && ctx.rerun && c.time <= 5000 && status === STATUS.STATUS_TIME_LIMIT_EXCEEDED) {
             ctx.rerun--;
             return await runner(ctx, ctxSubtask);

packages/hydrojudge/src/sandbox.ts

@@ -179,6 +179,10 @@ export async function del(fileId: string) {
     await client.deleteFile(fileId);
 }
 
+export async function get(fileId: string) {
+    return await client.getFile(fileId);
+}
+
 export async function run(execute: string, params?: Parameter): Promise<SandboxAdaptedResult> {
     let result: SandboxResult;
     try {

packages/hydrojudge/src/sandbox/client.ts

@@ -9,7 +9,7 @@ const client = new Proxy({
         return superagent.post(`${url}/run`).send(req).then((res) => res.body);
     },
     getFile(fileId: string): Promise<Buffer> {
-        return superagent.get(`${url}/file/${fileId}`).then((res) => res.body);
+        return superagent.get(`${url}/file/${fileId}`).responseType('arraybuffer').then((res) => res.body);
     },
     deleteFile(fileId: string): Promise<void> {
         return superagent.delete(`${url}/file/${fileId}`).then((res) => res.body);