fix: 修复无法导出的问题

app/Module/Down.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Module;
+
+use Request;
+use Cache;
+
+class Down
+{
+    /**
+     * @param $data
+     * @param null $ttl
+     * @return string
+     */
+    public static function cache_encode($data, $ttl = null): string
+    {
+        $base64 = base64_encode(Base::array2string($data));
+        $key = md5($base64);
+        Cache::put("down::{$key}", $base64, $ttl ?: now()->addHour());
+        return $key;
+    }
+
+    /**
+     * @param ?string $inputName
+     * @return array
+     */
+    public static function cache_decode(?string $inputName = 'key'): array
+    {
+        $key = Request::input($inputName);
+        $base64 = Cache::get("down::{$key}");
+        if (empty($base64)) {
+            return Base::ajaxError("请求已过期，请重新导出！", [], 0, 403);
+        }
+        //
+        return Base::string2array(base64_decode($base64));
+    }
+}