IV를 암호화된 파일 및 썸네일 앞에 합쳐서 전송하도록 변경

src/routes/api/file/[id]/download/+server.ts

@@ -1,10 +1,15 @@
 import { error } from "@sveltejs/kit";
 import { z } from "zod";
 import { authorize } from "$lib/server/modules/auth";
+import { parseRangeHeader, getContentRangeHeader } from "$lib/server/modules/http";
 import { getFileStream } from "$lib/server/services/file";
 import type { RequestHandler } from "./$types";
 
-export const GET: RequestHandler = async ({ locals, params }) => {
+const downloadHandler = async (
+  locals: App.Locals,
+  params: Record<string, string>,
+  request: Request,
+) => {
   const { userId } = await authorize(locals, "activeClient");
 
   const zodRes = z
@@ -15,11 +20,29 @@ export const GET: RequestHandler = async ({ locals, params }) => {
   if (!zodRes.success) error(400, "Invalid path parameters");
   const { id } = zodRes.data;
 
-  const { encContentStream, encContentSize } = await getFileStream(userId, id);
-  return new Response(encContentStream as ReadableStream, {
+  const { encContentStream, range } = await getFileStream(
+    userId,
+    id,
+    parseRangeHeader(request.headers.get("Range")),
+  );
+  return {
+    stream: encContentStream,
     headers: {
+      "Accept-Ranges": "bytes",
+      "Content-Length": (range.end - range.start + 1).toString(),
       "Content-Type": "application/octet-stream",
-      "Content-Length": encContentSize.toString(),
+      ...getContentRangeHeader(range),
     },
-  });
+    isRangeRequest: !!range,
+  };
+};
+
+export const GET: RequestHandler = async ({ locals, params, request }) => {
+  const { stream, headers, isRangeRequest } = await downloadHandler(locals, params, request);
+  return new Response(stream as ReadableStream, { status: isRangeRequest ? 206 : 200, headers });
+};
+
+export const HEAD: RequestHandler = async ({ locals, params, request }) => {
+  const { headers, isRangeRequest } = await downloadHandler(locals, params, request);
+  return new Response(null, { status: isRangeRequest ? 206 : 200, headers });
 };