if you want to set access permissions, it is convenient to use PHP , and use PHP to write an interface for downloading files. Here is demo
class Index extends Controller
{
public function file()
{
$filename = $_GET['filename'];
//
// dosomething
//
$s = new sendfile();
$file = '/data/file/' . $filename;
try {
$s->send($file);
} catch (\Exception $e) {
echo $e->getMessage();
}
}
}http-send-file
you can configure your protected image directory in nginx or apache to jump to the specified file of your project by default, which will determine the permissions and then decide whether to display the image.
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