diff --git a/package.json b/package.json
index 5262349..8c29ebb 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "iconv-lite": "^0.6.2",
     "koa": "^2.13.1",
     "koa-body": "^4.2.0",
+    "koa-send": "^5.0.1",
     "log4js": "^6.4.0",
     "node-disk-info": "^1.3.0",
     "node-schedule": "^2.0.0",
@@ -44,17 +45,18 @@
     "@types/iconv-lite": "0.0.1",
     "@types/koa": "^2.13.4",
     "@types/koa__router": "^8.0.7",
+    "@types/koa-send": "^4.1.3",
     "@types/log4js": "^2.3.5",
     "@types/mocha": "^8.2.2",
     "@types/node": "^18.11.18",
-    "@types/ssh2": "^1.11.7",
     "@types/node-schedule": "^1.3.2",
     "@types/os-utils": "0.0.1",
     "@types/pidusage": "^2.0.1",
+    "@types/ssh2": "^1.11.7",
     "@types/uuid": "^8.3.0",
-    "ts-node": "^10.9.1",
     "eslint": "^7.13.0",
     "nodemon": "^2.0.20",
+    "ts-node": "^10.9.1",
     "typescript": "^4.9.4",
     "webpack": "^5.73.0",
     "webpack-cli": "^4.10.0",
diff --git a/src/routers/http_router.ts b/src/routers/http_router.ts
index 57a1c68..d0d961b 100755
--- a/src/routers/http_router.ts
+++ b/src/routers/http_router.ts
@@ -2,6 +2,7 @@
 
 import { $t } from "../i18n";
 import Router from "@koa/router";
+import send from "koa-send";
 import fs from "fs-extra";
 import path from "path";
 import { missionPassport } from "../service/mission_passport";
@@ -30,17 +31,16 @@ router.get("/download/:key/:fileName", async (ctx) => {
 
     const cwd = instance.config.cwd;
     const fileRelativePath = mission.parameter.fileName;
-    const ext = path.extname(fileRelativePath);
+
     // Check for file cross-directory security risks
     const fileManager = new FileManager(cwd);
     if (!fileManager.check(fileRelativePath)) throw new Error((ctx.body = "Access denied: Invalid destination"));
 
-    // start downloading the file to the user
-    ctx.response.set("Content-Disposition", `attachment; filename="${encodeURIComponent(paramsFileName)}"`);
-    ctx.type = ext;
-    ctx.body = fs.createReadStream(fileManager.toAbsolutePath(fileRelativePath));
-    // The task has been executed, destroy the passport
-    missionPassport.deleteMission(key);
+    // send File
+    const fileAbsPath = fileManager.toAbsolutePath(fileRelativePath);
+    const fileDir = path.dirname(fileAbsPath);
+    const fileName = path.basename(fileAbsPath);
+    await send(ctx, fileName, { root: fileDir + "/" });
   } catch (error) {
     ctx.body = $t("http_router.downloadErr", { error: error.message });
     ctx.status = 500;