diff --git a/common.php b/common.php
index fd601a6..121e18d 100644
--- a/common.php
+++ b/common.php
@@ -59,6 +59,8 @@ $EnvConfigs = [
     'guestup_path'      => 0b111,
     'domainforproxy'    => 0b111,
     'public_path'       => 0b111,
+    'fileConduitSize'   => 0b110,
+    'fileConduitCacheTime'   => 0b110,
 ];
 
 $timezones = array( 
@@ -392,6 +394,20 @@ function main($path)
             $url = $files['url'];
             if ( strtolower(splitlast($files['name'], '.')[1])=='html' ) return output($files['content']['body'], $files['content']['stat']);
             else {
+                $fileConduitSize = getConfig('fileConduitSize', $_SERVER['disktag']);
+                $fileConduitCacheTime = getConfig('fileConduitCacheTime', $_SERVER['disktag']);
+                if (!!$fileConduitSize || !!$fileConduitCacheTime) {
+                    if ($fileConduitSize>1) $fileConduitSize *= 1024*1024;
+                    else $fileConduitSize = 1024*1024;
+                    if ($fileConduitCacheTime>1) $fileConduitCacheTime *= 3600;
+                    else $fileConduitCacheTime = 3600;
+                    if ($files['size']<$fileConduitSize) return output(
+                        base64_encode(file_get_contents($files['url'])),
+                        200,
+                        ['Content-Type' => $files['mime'], 'Cache-Control' => 'max-age=' . $fileConduitCacheTime],
+                        true
+                    );
+                }
                 if ($_SERVER['HTTP_RANGE']!='') $header['Range'] = $_SERVER['HTTP_RANGE'];
                 $header['Location'] = $url;
                 $domainforproxy = '';
diff --git a/index.php b/index.php
index a2d9bd1..1c78c03 100644
--- a/index.php
+++ b/index.php
@@ -30,7 +30,8 @@ if (isset($_SERVER['USER'])&&$_SERVER['USER']==='qcloud') {
         header($headerName . ': ' . $headerVal, true);
     }
     http_response_code($re['statusCode']);
-    echo $re['body'];
+    if ($re['isBase64Encoded']) echo base64_decode($re['body']);
+    else echo $re['body'];
 } elseif (isset($_SERVER['DOCUMENT_ROOT'])&&$_SERVER['DOCUMENT_ROOT']==='/var/task/user') {
     if (getenv('ONEMANAGER_CONFIG_SAVE')=='env') include 'platform/Vercel_env.php';
     else include 'platform/Vercel.php';
@@ -44,7 +45,8 @@ if (isset($_SERVER['USER'])&&$_SERVER['USER']==='qcloud') {
         header($headerName . ': ' . $headerVal, true);
     }
     http_response_code($re['statusCode']);
-    echo $re['body'];
+    if ($re['isBase64Encoded']) echo base64_decode($re['body']);
+    else echo $re['body'];
 } else {
     include 'platform/Normal.php';
     $path = getpath();
@@ -58,7 +60,8 @@ if (isset($_SERVER['USER'])&&$_SERVER['USER']==='qcloud') {
         header($headerName . ': ' . $headerVal, true);
     }
     http_response_code($re['statusCode']);
-    echo $re['body'];
+    if ($re['isBase64Encoded']) echo base64_decode($re['body']);
+    else echo $re['body'];
 }
 
 // Tencent SCF
diff --git a/theme/classic.html b/theme/classic.html
index 3188f68..1a41e31 100644
--- a/theme/classic.html
+++ b/theme/classic.html
@@ -601,12 +601,12 @@
             });
         }
     }
-    addVideos(['<!--FileEncodeUrl-->']);
+    addVideos(["<!--FileEncodeUrl-->"]);
 <!--IsvideoFileEnd-->
 <!--IspdfFileStart-->
     pdfjsLib.GlobalWorkerOptions.workerSrc = '//cdn.bootcss.com/pdf.js/2.3.200/pdf.worker.min.js';
     var loadingTask = pdfjsLib.getDocument({
-        url: '<!--FileDownUrl-->',
+        url: "<!--FileDownUrl-->",
         cMapUrl: "//cdn.jsdelivr.net/npm/pdfjs-dist@2.2.228/cmaps/",
         cMapPacked: true,
         rangeChunkSize: 65535