mint/app/Http/Controllers/OfflineIndexController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use App\Tools\RedisClusters;
use Illuminate\Support\Facades\Redis;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\App;

class OfflineIndexController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        //
        $key = '/offline/index/wikipali-offline';
        if($request->has('file')){
            $key .= '-'.$request->get('file');
        }

        if(RedisClusters::has($key)){
            $fileInfo = RedisClusters::get($key);
            foreach ($fileInfo as $key => $file) {
                $zipFile = $file['filename'];
                $bucket = config('mint.attachments.bucket_name.temporary');
                $tmpFile =  $bucket.'/'. $zipFile ;
                $url = array();
                foreach (config('mint.server.cdn_urls') as $key => $cdn) {
                    $url[] = [
                            'link' => $cdn . '/' . $zipFile,
                            'hostname' =>'cdn-' . $key,
                        ];
                }
                if (App::environment('local')) {
                    $s3Link = Storage::url($tmpFile);
                }else{
                    try{
                        $s3Link = Storage::temporaryUrl($tmpFile, now()->addDays(2));
                    }catch(\Exception $e){
                        Log::error('offline-index {Exception}',['exception'=>$e]);
                        continue;
                    }
                }
                Log::info('offline-index: link='.$s3Link);
                $url[] = [
                    'link'=>$s3Link,
                    'hostname'=>'Amazon cloud storage(Hongkong)',
                ];
                $fileInfo[$key]['url'] = $url;
            }
            return response()->json($fileInfo,
                                    200,
                                    [
                                        'Content-Type' => 'application/json;charset=UTF-8',
                                        'Charset' => 'utf-8'
                                    ],
                                    JSON_UNESCAPED_UNICODE
                                );
        }else{
            return [];
        }
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //
    }

    /**
     * Display the specified resource.
     *
     * @param  string  $filename
     * @return \Illuminate\Http\Response
     */
    public function show($filename)
    {

    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        //
    }
}