diff --git a/package.json b/package.json
index 462d1e0..ac1d297 100644
--- a/package.json
+++ b/package.json
@@ -13,12 +13,15 @@
     "dedent-js": "^1.0.1",
     "itty-router": "^4.0.23",
     "js-sha256": "^0.10.1",
-    "nanoid": "^5.0.2"
+    "nanoid": "^5.0.2",
+    "xml2js": "^0.6.2"
   },
   "devDependencies": {
     "@cloudflare/workers-types": "^4.20231025.0",
     "@types/bootstrap": "^5.2.8",
     "@types/jquery": "^3.5.25",
+    "@types/crypto-js": "4.2.2",
+    "@types/xml2js": "^0.4.14",
     "eslint": "^8.52.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-formatter-friendly": "^7.0.0",
diff --git a/src/index.ts b/src/index.ts
index f245121..203efc9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -27,9 +27,22 @@ import { get_presign_url, router as large_upload } from './v2/large_upload';
 
 const router = Router<ERequest, [Env, ExecutionContext]>();
 
+// Shared common properties to all route
+router.all('*', (request) => {
+  const { headers } = request;
+  // Detect if request from browsers
+  const agent = headers.get('user-agent') ?? '';
+  request.is_browser = ['Chrome', 'Mozilla', 'AppleWebKit', 'Safari', 'Gecko', 'Chromium'].some((v) =>
+    agent.includes(v)
+  );
+  // Append the origin/referer
+  request.origin = headers.get('origin') ?? undefined;
+});
+
 // Handle preflighted CORS request
 router.options('*', (request) => {
-  const url = new URL(request.url);
+  if (!request.origin) return new Response(null);
+  const url = new URL(request.origin);
   // Allow all subdomain of nekoid.cc
   if (url.hostname.endsWith('nekoid.cc')) {
     return new Response(null, {
@@ -37,21 +50,12 @@ router.options('*', (request) => {
       headers: {
         'Access-Control-Allow-Origin': url.origin,
         'Access-Control-Allow-Methods': 'GET, POST, DELETE, OPTIONS',
-        'Vary': 'Origin',
-      }
-    })
+        Vary: 'Origin',
+      },
+    });
   }
 });
 
-// Shared common properties to all route
-router.all('*', (request) => {
-  // Detect if request from browsers
-  const agent = request.headers.get('user-agent') ?? '';
-  request.is_browser = ['Chrome', 'Mozilla', 'AppleWebKit', 'Safari', 'Gecko', 'Chromium'].some((v) =>
-    agent.includes(v)
-  );
-});
-
 /* Static file path */
 // Web homepage
 router.get('/', (request) => {
@@ -546,13 +550,14 @@ router.all('*', () => {
 });
 
 export default {
-  fetch: (req: Request, env: Env, ctx: ExecutionContext) =>
+  fetch: (req: ERequest, env: Env, ctx: ExecutionContext) =>
     router
       .handle(req, env, ctx)
       .catch(error)
       // Apply CORS headers
       .then((res: Response) => {
-        const url = new URL(req.url);
+        if (!req.origin) return res;
+        const url = new URL(req.origin);
         // Allow all subdomain of nekoid.cc
         if (url.hostname.endsWith('nekoid.cc')) {
           res.headers.set('Access-Control-Allow-Origin', url.origin);
diff --git a/src/types.d.ts b/src/types.d.ts
index ed419b8..c9fb09f 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -2,6 +2,7 @@ import { IRequest } from 'itty-router';
 
 export type ERequest = {
   is_browser: boolean;
+  origin?: string;
   // match_etag?: string;
 } & IRequest;
 
@@ -20,6 +21,8 @@ export interface PasteIndexEntry {
   // Only apply when large_paste
   upload_completed?: boolean;
   sha256_hash?: string;
+  cached_presigned_url?: string;
+  cached_presigned_url_expiration?: string;
 }
 
 export interface Env {
diff --git a/src/utils.ts b/src/utils.ts
index 366ed5e..52c869d 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -23,14 +23,7 @@ import { PasteIndexEntry, Env } from './types';
 
 export const gen_id = customAlphabet('1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', UUID_LENGTH);
 
-export async function get_paste_info(
-  uuid: string,
-  descriptor: PasteIndexEntry,
-  env: Env,
-  use_html: boolean = true,
-  need_qr: boolean = false,
-  reply_json = false
-): Promise<Response> {
+export function get_paste_info_obj(uuid: string, descriptor: PasteIndexEntry, env: Env) {
   const created = new Date(descriptor.last_modified);
   const expired = new Date(descriptor.expiration ?? descriptor.last_modified + 2419200000);
   const link = `https://${SERVICE_URL}/${uuid}`;
@@ -49,6 +42,18 @@ export async function get_paste_info(
     expired: expired.toISOString(),
     update_completed: descriptor.upload_completed ?? undefined, // only for large_paste
   };
+  return paste_info;
+}
+
+export async function get_paste_info(
+  uuid: string,
+  descriptor: PasteIndexEntry,
+  env: Env,
+  use_html: boolean = true,
+  need_qr: boolean = false,
+  reply_json = false
+): Promise<Response> {
+  const paste_info = get_paste_info_obj(uuid, descriptor, env);
 
   // Reply with JSON
   if (reply_json) {
@@ -63,7 +68,7 @@ export async function get_paste_info(
   // Plain text reply
   let content = dedent`
     uuid: ${uuid}
-    link: ${link}
+    link: ${paste_info.link}
     type: ${paste_info.type ?? 'paste'}
     title: ${paste_info.title || '-'}
     mime-type: ${paste_info.mime_type ?? '-'}
@@ -95,7 +100,7 @@ export async function get_paste_info(
           ${
             need_qr
               ? `<img src="${paste_info.link_qr}"
-            alt="${link}" style="max-width: 280px">`
+            alt="${paste_info.link}" style="max-width: 280px">`
               : ''
           } 
         </body>
@@ -116,7 +121,7 @@ export async function get_paste_info(
     const res = await env.QRCODE.fetch(
       'https://qrcode.nekoid.cc?' +
         new URLSearchParams({
-          q: link,
+          q: paste_info.link,
           type: 'utf8',
         })
     );
diff --git a/src/v2/large_upload.ts b/src/v2/large_upload.ts
index dbfdc2a..9916357 100644
--- a/src/v2/large_upload.ts
+++ b/src/v2/large_upload.ts
@@ -1,8 +1,9 @@
 import { Router } from 'itty-router';
 import { sha256 } from 'js-sha256';
 import { AwsClient } from 'aws4fetch';
+import { parseStringPromise } from 'xml2js';
 import { ERequest, Env, PasteIndexEntry } from '../types';
-import { gen_id } from '../utils';
+import { gen_id, get_paste_info_obj } from '../utils';
 import { UUID_LENGTH } from '../constant';
 
 export const router = Router<ERequest, [Env, ExecutionContext]>({ base: '/v2/large_upload' });
@@ -195,24 +196,31 @@ router.post('/complete/:uuid', async (request, env, ctx) => {
   });
 
   try {
-    const objectmeta = await s3.fetch(`${env.LARGE_ENDPOINT}/${uuid}`, {
-      method: 'HEAD',
+    // Get object attributes
+    const objectmeta = await s3.fetch(`${env.LARGE_DOWNLOAD_ENDPOINT}/${uuid}?attributes`, {
+      method: 'GET',
+      headers: {
+        'X-AMZ-Object-Attributes': 'ObjectSize',
+      },
     });
     if (objectmeta.ok) {
-      const { headers } = objectmeta;
-      const file_size = headers.get('Content-Length') || '0';
+      const xml = await objectmeta.text();
+      const parsed = await parseStringPromise(xml, {
+        tagNameProcessors: [(name) => name.toLowerCase()],
+      });
+      const file_size = parsed.getobjectattributesresponse.objectsize[0];
       if (parseInt(file_size) !== descriptor.size) {
         return new Response('This paste is not finishing the upload.\n', {
           status: 400,
         });
       }
     } else {
-      return new Response('This paste is not finishing the upload.\n', {
+      return new Response('This paste is not finishing upload.\n', {
         status: 400,
       });
     }
   } catch (err) {
-    return new Response('Unable to connect to remote.\n', {
+    return new Response('Internal server error.\n', {
       status: 500,
     });
   }
@@ -225,14 +233,12 @@ router.post('/complete/:uuid', async (request, env, ctx) => {
   ctx.waitUntil(env.PASTE_INDEX.put(uuid, JSON.stringify(descriptor), { expirationTtl: 2419200 }));
 
   const paste_info = {
-    uuid,
     upload_completed: true,
     expired: new Date(expriation).toISOString(),
+    paste_info: get_paste_info_obj(uuid, descriptor, env),
   };
 
-  return new Response(JSON.stringify(paste_info), {
-    status: 400,
-  });
+  return new Response(JSON.stringify(paste_info));
 });
 
 router.get('/:uuid', async (request, env, ctx) => {
diff --git a/wrangler.toml b/wrangler.toml
index f1f2cf9..5eb9e3e 100644
--- a/wrangler.toml
+++ b/wrangler.toml
@@ -8,6 +8,7 @@ kv_namespaces = [
 services = [
     { binding = "QRCODE", service = "qrcode-gen", environment = "production" }
 ]
+node_compat = true
 
 # [secret]
 # AWS_ACCESS_KEY_ID
diff --git a/yarn.lock b/yarn.lock
index b3d0578..ee6da17 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -302,6 +302,11 @@
   dependencies:
     "@popperjs/core" "^2.9.2"
 
+"@types/crypto-js@4.2.2":
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/@types/crypto-js/-/crypto-js-4.2.2.tgz#771c4a768d94eb5922cc202a3009558204df0cea"
+  integrity sha512-sDOLlVbHhXpAUAL0YHDUUwDZf3iN4Bwi4W6a0W0b+QcAezUbRtH4FVb+9J4h+XFPW7l/gQ9F8qC7P+Ec4k8QVQ==
+
 "@types/jquery@^3.5.25":
   version "3.5.29"
   resolved "https://registry.yarnpkg.com/@types/jquery/-/jquery-3.5.29.tgz#3c06a1f519cd5fc3a7a108971436c00685b5dcea"
@@ -333,6 +338,13 @@
   resolved "https://registry.yarnpkg.com/@types/sizzle/-/sizzle-2.3.8.tgz#518609aefb797da19bf222feb199e8f653ff7627"
   integrity sha512-0vWLNK2D5MT9dg0iOo8GlKguPAU02QjmZitPEsXRuJXU/OGIOt9vT9Fc26wtYuavLxtO45v9PGleoL9Z0k1LHg==
 
+"@types/xml2js@^0.4.14":
+  version "0.4.14"
+  resolved "https://registry.yarnpkg.com/@types/xml2js/-/xml2js-0.4.14.tgz#5d462a2a7330345e2309c6b549a183a376de8f9a"
+  integrity sha512-4YnrRemBShWRO2QjvUin8ESA41rH+9nQGLUGZV/1IDhi3SL9OhdpNC/MrulTWuptXKwhx/aDxE7toV0f/ypIXQ==
+  dependencies:
+    "@types/node" "*"
+
 "@ungap/structured-clone@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@ungap/structured-clone/-/structured-clone-1.2.0.tgz#756641adb587851b5ccb3e095daf27ae581c8406"
@@ -1729,6 +1741,11 @@ safe-regex-test@^1.0.0:
     get-intrinsic "^1.2.2"
     is-regex "^1.1.4"
 
+sax@>=0.6.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.3.0.tgz#a5dbe77db3be05c9d1ee7785dbd3ea9de51593d0"
+  integrity sha512-0s+oAmw9zLl1V1cS9BtZN7JAd0cW5e0QH4W3LWEK6a4LaLEA2OTpGYWDY+6XasBLtz6wkm3u1xRw95mRuJ59WA==
+
 selfsigned@^2.0.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/selfsigned/-/selfsigned-2.4.1.tgz#560d90565442a3ed35b674034cec4e95dceb4ae0"
@@ -2060,6 +2077,19 @@ ws@^8.11.0:
   resolved "https://registry.yarnpkg.com/ws/-/ws-8.16.0.tgz#d1cd774f36fbc07165066a60e40323eab6446fd4"
   integrity sha512-HS0c//TP7Ina87TfiPUz1rQzMhHrl/SG2guqRcTOIUYD2q8uhUdNHZYJUaQ8aTGPzCh+c6oawMKW35nFl1dxyQ==
 
+xml2js@^0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/xml2js/-/xml2js-0.6.2.tgz#dd0b630083aa09c161e25a4d0901e2b2a929b499"
+  integrity sha512-T4rieHaC1EXcES0Kxxj4JWgaUQHDk+qwHcYOCFHfiwKz7tOVPLq7Hjq9dM1WCMhylqMEfP7hMcOIChvotiZegA==
+  dependencies:
+    sax ">=0.6.0"
+    xmlbuilder "~11.0.0"
+
+xmlbuilder@~11.0.0:
+  version "11.0.1"
+  resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-11.0.1.tgz#be9bae1c8a046e76b31127726347d0ad7002beb3"
+  integrity sha512-fDlsI/kFEx7gLvbecc0/ohLG50fugQp8ryHzMTuW9vSa1GJ0XYWKnhsUx7oie3G98+r56aTQIUB4kht42R3JvA==
+
 xxhash-wasm@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/xxhash-wasm/-/xxhash-wasm-1.0.2.tgz#ecc0f813219b727af4d5f3958ca6becee2f2f1ff"