diff --git a/backend/package.json b/backend/package.json
index a610d4b..bb33ea4 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.145",
+  "version": "2.14.146",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/core/proxy-utils/processors/index.js b/backend/src/core/proxy-utils/processors/index.js
index 26cc161..e1c0b6e 100644
--- a/backend/src/core/proxy-utils/processors/index.js
+++ b/backend/src/core/proxy-utils/processors/index.js
@@ -316,11 +316,20 @@ function ScriptOperator(script, targetPlatform, $arguments, source) {
             await (async function () {
                 const operator = createDynamicFunction(
                     'operator',
-                    `async function operator(proxies = []) {
-                        return proxies.map(($server = {}) => {
-                          ${script}
-                          return $server
-                        })
+                    `async function operator(input = []) {
+                        let proxies
+                        if (Array.isArray(input)) {
+                            proxies = input
+                            return proxies.map(($server = {}) => {
+                                ${script}
+                                return $server
+                            })
+                        } else {
+                            let $content = input
+                            ${script}
+                            return $content
+                        }
+                        
                       }`,
                     $arguments,
                 );
@@ -689,7 +698,10 @@ async function ApplyOperator(operator, objs) {
         );
         let funcErr = '';
         let funcErrMsg = `${err.message ?? err}`;
-        if (funcErrMsg.includes('$server is not defined')) {
+        if (
+            funcErrMsg.includes('$server is not defined') ||
+            funcErrMsg.includes('$content is not defined')
+        ) {
             funcErr = '';
         } else {
             funcErr = `执行 function operator 失败 ${funcErrMsg}; `;
diff --git a/backend/src/restful/file.js b/backend/src/restful/file.js
index bf2db86..29a3738 100644
--- a/backend/src/restful/file.js
+++ b/backend/src/restful/file.js
@@ -3,6 +3,7 @@ import { FILES_KEY } from '@/constants';
 import { failed, success } from '@/restful/response';
 import $ from '@/core/app';
 import { RequestInvalidError, ResourceNotFoundError } from '@/restful/errors';
+import { ProxyUtils } from '@/core/proxy-utils';
 
 export default function register($app) {
     if (!$.read(FILES_KEY)) $.write([], FILES_KEY);
@@ -40,13 +41,17 @@ function createFile(req, res) {
     success(res, file, 201);
 }
 
-function getFile(req, res) {
+async function getFile(req, res) {
     let { name } = req.params;
     name = decodeURIComponent(name);
     const allFiles = $.read(FILES_KEY);
     const file = findByName(allFiles, name);
     if (file) {
-        res.set('Content-Type', 'text/plain; charset=utf-8').send(file.content);
+        let content = file.content ?? '';
+        content = await ProxyUtils.process(content, file.process || []);
+        res.set('Content-Type', 'text/plain; charset=utf-8').send(
+            content ?? '',
+        );
     } else {
         failed(
             res,
diff --git a/backend/src/restful/preview.js b/backend/src/restful/preview.js
index 54e9329..04be134 100644
--- a/backend/src/restful/preview.js
+++ b/backend/src/restful/preview.js
@@ -9,6 +9,28 @@ import $ from '@/core/app';
 export default function register($app) {
     $app.post('/api/preview/sub', compareSub);
     $app.post('/api/preview/collection', compareCollection);
+    $app.post('/api/preview/file', previewFile);
+}
+
+async function previewFile(req, res) {
+    try {
+        let { content = '', process = [] } = req.body;
+
+        const processed = await ProxyUtils.process(content, process || []);
+
+        // produce
+        success(res, { original: content, processed });
+    } catch (err) {
+        $.error(err.message ?? err);
+        failed(
+            res,
+            new InternalServerError(
+                `INTERNAL_SERVER_ERROR`,
+                `Failed to preview file`,
+                `Reason: ${err.message ?? err}`,
+            ),
+        );
+    }
 }
 
 async function compareSub(req, res) {
diff --git a/backend/src/restful/sync.js b/backend/src/restful/sync.js
index 05a14c5..e1f137d 100644
--- a/backend/src/restful/sync.js
+++ b/backend/src/restful/sync.js
@@ -331,7 +331,10 @@ async function produceArtifact({
     } else if (type === 'file') {
         const allFiles = $.read(FILES_KEY);
         const file = findByName(allFiles, name);
-        return file?.content ?? '';
+        if (!file) throw new Error(`找不到文件 ${name}`);
+        let content = file.content ?? '';
+        content = await ProxyUtils.process(content, file.process || []);
+        return content ?? '';
     }
 }