Laravel-cors 跨域

解决跨域问题 barryvdh/Laravel-cors： https://learnku.com/articles/42923

　composer

"league/flysystem": "1.1",

　app.php

//filesystems
$app->configure('filesystems');

　　

$app->middleware([
    BarryvdhCorsHandleCors::class,
]);

其他原因

The 'Access-Control-Allow-Origin' header contains multiple values'*, *', but only one is allowed.

https://www.cnblogs.com/zsg88/articles/11576324.html