Return JSON for exception with octoberCMS

I have some custom routes

Route::get('/files/', [
            'as' => 'read',
            'uses' => 'Myname\MyPlugin\Http\Controllers\[email protected]'
        ]);

Somewhere in my class I have a function to validate a path

private function getPath()
{
    $path = Input::get('path');

    if (!$path)
    {
    throw new MyException('parameter is missing. path required', 400);
    }

    return base_path().'/'.$path;
}

I have set a custom error handler with a JSOM but it's the error handler of OctoberCMS that render the error in HTML format.

Do you know a way to replace default error handler of OctoberCMS by a custom one ? Thanks

Just found the anwser in the documentation : https://octobercms.com/docs/services/error-log#exception-handling

October provide App:error to manage Exception in your plugin.

App::error(function(MyException $exception) {
//do what you want here
}

Don't forger to create a custom Exception for your plugin. If you use the generic Exception, you'll catch all the Exceptions.