Symfony2 - 强制文件下载 [英] Symfony2 - Force file download

问题描述

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; 
  

这是打开对话框保存文件，但它表示文件是0字节。
并将其更改为：

  $ 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; 
  

我收到一堆奇怪的字符，而不是文件下载对话框。

最后，将setContent行切换到：

  $ response-> setContent的file_get_contents（$文件名））; 
  

它返回一个PHP错误：

致命错误：允许的内存大小...

有关如何实现这一点的任何线索？
我以前在PHP（wihtout MVC）中完成了，但我不知道通过Symfony2做什么可以丢失...

也许解决方案是在PHP.INI中设置memory_limit，但我猜这不是最好的做法。

解决方案

首先，感谢大家的回复。我终于解决了这个没有X-SendFile（这可能是最好的做法）。无论如何，对于那些不能让X-Sendfile apache模块工作的人（共享主机），这里有一个解决方案：

  /生成响应
 $ response = new Response（）; 
 
 //设置头文件
 $ 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））; 
 
 //在输出任何东西之前发送头文件
 $ response-> sendHeaders（）; 
 
 $ response-> setContent（file_get_contents（$ filename））; 
  

希望这有帮助！

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

In Controller:

    $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;

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;

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

Finally, switching the "setContent" line to:

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

It returns a PHP error:

Fatal error: Allowed memory size...

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...

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

解决方案

First of all, thanks to everyone for your replies. 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));

Hope this helps!

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