该方法创建一个zip文件并下载它。该文件在storage/app/public文件夹中创建（我运行php artisan storage:link创建了一个符号链接），但它不下载。

public function download()
{
    $zip_file = 'screenshots.zip';
    $zip_path = storage_path('app/public/'.$zip_file);
    $zip = new \ZipArchive();
    $zip->open($zip_path, \ZipArchive::CREATE | \ZipArchive::OVERWRITE);

    $path = storage_path('app/public/screenshots');
    $files = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path));
    foreach ($files as $name => $file) {
        if ($file->isDir()) {
            continue;
        }

        $filePath = $file->getRealPath();
        $relativePath = 'screenshots/' . substr($filePath, strlen($path) + 1);
        $zip->addFile($filePath, $relativePath);
    }

    $zip->close();

    return response()->download($zip_path);
}

JS系统

function downloadImages() {
    const token = document.querySelector('meta[name="csrf-token"]').content;

    fetch('/download', {
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json, text-plain, */*',
            'X-Requested-With': 'XMLHttpRequest',
            'X-CSRF-TOKEN': token
        },
        method: 'get',
    })
        .then((response) => {
            console.log('download');
        })
        .catch((error) => {
            console.log(error);
        })
}