diff --git a/common.php b/common.php
index fd601a6..d3c5449 100644
--- a/common.php
+++ b/common.php
@@ -38,6 +38,7 @@ $EnvConfigs = [
     'useBasicAuth'      => 0b010,
     'referrer'          => 0b011,
     'forceHttps'        => 0b010,
+    'littleFileCacheTime'        => 0b010,
 
     'Driver'            => 0b100,
     'client_id'         => 0b100,
@@ -392,6 +393,17 @@ function main($path)
             $url = $files['url'];
             if ( strtolower(splitlast($files['name'], '.')[1])=='html' ) return output($files['content']['body'], $files['content']['stat']);
             else {
+                $littleFileCacheTime = getConfig('littleFileCacheTime');
+                if ($files['size']<1024*1024 && !!$littleFileCacheTime) {
+                    if ($littleFileCacheTime>1) $littleFileCacheTime *= 3600;
+                    else $littleFileCacheTime = 3600;
+                    return output(
+                        base64_encode(file_get_contents($files['url'])),
+                        200,
+                        ['Content-Type' => $files['mime'], 'Cache-Control' => 'max-age=' . $littleFileCacheTime],
+                        true
+                    );
+                }
                 if ($_SERVER['HTTP_RANGE']!='') $header['Range'] = $_SERVER['HTTP_RANGE'];
                 $header['Location'] = $url;
                 $domainforproxy = '';
diff --git a/conststr.php b/conststr.php
index 00de5af..b3a6db3 100644
--- a/conststr.php
+++ b/conststr.php
@@ -105,6 +105,7 @@ $constStr = [
             'background' => 'Set an url as background photo.',
             'backgroundm' => 'Set an url as background in mobile phone.',
             'forceHttps' => 'if 1, force to redirect to https when visit via http.',
+            'littleFileCacheTime' => 'Unit is hour, if set this, little file<1M will through program and cache in explorer, otherwise, default 302 to Microsoft',
             'theme' => 'Select theme for guest.',
             'timezone' => 'Set default timezone.',
             'guestup_path' => 'Set guest upload dir, before set this, the files in this dir will show as normal.',
@@ -133,6 +134,7 @@ $constStr = [
             'background' => '设置一个url作为背景。',
             'backgroundm' => '设置一个url作为手机端用的背景。',
             'forceHttps' => '0或1。如果设置为1，会强制跳https',
+            'littleFileCacheTime' => '单位是小时，如果设置，小于1M的小文件会从程序通过然后缓存在浏览器，不然，默认302跳微软',
             'theme' => '为游客选择一个主题。',
             'timezone' => '设置默认时区。',
             'guestup_path' => '设置游客上传路径（图床路径），不设置这个值时该目录内容会正常列文件出来，设置后只有上传界面，不显示其中文件（登录后显示）。',
diff --git a/index.php b/index.php
index a2d9bd1..1c78c03 100644
--- a/index.php
+++ b/index.php
@@ -30,7 +30,8 @@ if (isset($_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