Symfony2 - 强制文件下载

2022-01-11 00:00:00 download header php symfony

当用户点击下载链接时，我正在尝试下载文件.

I'm trying to download a file when a user clicks on download link.

在控制器中:

    $response = new Response();
    $response->headers->set('Content-type', 'application/octect-stream');
    $response->headers->set('Content-Disposition', sprintf('attachment; filename="%s"', $filename));
    $response->headers->set('Content-Length', filesize($filename));

    return $response;

这是打开保存文件的对话框，但它说文件是 0 字节.并将其更改为:

This is opening the dialog box to save the file, but it says the file is 0 bytes. And changing it to:

        $response = new Response();
        $response->headers->set('Content-type', 'application/octect-stream');
        $response->headers->set('Content-Disposition', sprintf('attachment; filename="%s"', $filename));
        $response->headers->set('Content-Length', filesize($filename));
        $response->headers->set('Content-Transfer-Encoding', 'binary');
        $response->setContent(readfile($filename));

        return $response;

我得到一堆奇怪的字符而不是文件下载对话框.

I get a bunch of weird characters instead of the file download dialog box.

最后，将setContent"行切换为:

Finally, switching the "setContent" line to:

    $response->setContent(file_get_contents($filename));

它返回一个 PHP 错误:

It returns a PHP error:

致命错误:允许的内存大小...

Fatal error: Allowed memory size...

关于如何实现这一点的任何线索?我以前在 PHP 中做过(没有 MVC)，但我不知道通过 Symfony2 做这件事会缺少什么......

Any clues on how to achieve this? I've done it before in PHP (wihtout MVC), but I don't know what can be missing to do it through Symfony2...

也许解决方案是在 PHP.INI 中设置 memory_limit，但我想这不是最佳做法...

Maybe the solution is setting the memory_limit in PHP.INI, but I guess it´s not the best practice...

推荐答案

我终于在没有 X-SendFile 的情况下解决了这个问题(这可能是最佳实践).无论如何，对于那些无法让 X-Sendfile apache 模块工作(共享主机)的人，这里有一个解决方案:

I finally solved this without X-SendFile (which is probably the best practice). Anyway, for those who can't get X-Sendfile apache module to work (shared hosting), here's a solution:

// Generate response
$response = new Response();

// Set headers
$response->headers->set('Cache-Control', 'private');
$response->headers->set('Content-type', mime_content_type($filename));
$response->headers->set('Content-Disposition', 'attachment; filename="' . basename($filename) . '";');
$response->headers->set('Content-length', filesize($filename));

// Send headers before outputting anything
$response->sendHeaders();

$response->setContent(file_get_contents($filename));

return $response;

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