Php Symfony 1.4：提供文件下载的最佳方式，无需使用模板/视图

当然，其他一些人已经在stackoverflow上讨论了这些问题，但并不是所有的ansers都适合我，而且他们通常不提供symfony安装的版本

我阅读的主题：

这就是我要问的问题，您如何处理symfony 1.4中的文件下载（不使用视图）？在我的所有用例中，我都需要一个模板文件来呈现响应。如果我将响应发送到控制器，那么只有在没有php错误（标头已发送）的情况下，才能使用

控制器：

/** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->sendHttpHeaders();

readfile($filePath); die();

 /** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->setContent(file_get_contents($filePath));
$response->sendHttpHeaders();

return sfView::NONE;

<?php echo $sf_response->getRawValue()->getContent(); ?>

这在没有模板文件的情况下工作。但我觉得这不是很好的编码

使用模板的替代方法：

控制器：

/** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->sendHttpHeaders();

readfile($filePath); die();

 /** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->setContent(file_get_contents($filePath));
$response->sendHttpHeaders();

return sfView::NONE;

<?php echo $sf_response->getRawValue()->getContent(); ?>

查看：

/** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->sendHttpHeaders();

readfile($filePath); die();

 /** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
$response->setHttpHeader('Pragma', 'public');
$response->setContent(file_get_contents($filePath));
$response->sendHttpHeaders();

return sfView::NONE;

<?php echo $sf_response->getRawValue()->getContent(); ?>

---

根据文件的内容，我使用了两种方法。对于Excel文档等文档，我通常使用以下方法：

$this->getResponse()->clearHttpHeaders();
$this->getResponse()->setHttpHeaders('Content-Description','File Transer');
$this->getResponse()->setHttpHeaders('Content-Type','application/vnd.ms-excel'); //this would be based on your file
$this->getResponse()->setHttpHeaders('Content-Disposition','attachment;filename='.$filename); //$filename is name of file on server
$this->getResponse()->setHttpHeaders('Pragma','');
$this->getResponse()->setHttpHeaders('Cache-Control','');
$this->getResponse()->sendHttpHeaders();

$error_reporting = error_reporting(0);
$this->renderText($some_data->save('php://output')); //in this case the $some_data was a PHPExcel writer object but anything that can be saved to a [php://output][1] should work e.g. fwrite()
error_reporting($error_reporting);
return sfView::NONE

错误报告

关闭和打开与使用PHPExcel写入流有关

我使用的另一种方法是使用

sfResponse

的

sendContent（）

方法。这种用法的示例如下：

$this->getResponse()->clearHttpheaders();
$this->getResponse()->setHttpHeader('Content-Description','File Transfer');
$this->getResponse()->setHttpHeader('Cache-Control', 'public, must-revalidate, max-age=0');
$this->getResponse()->setHttpHeader('Pragma: public',true);
$this->getResponse()->setHttpHeader('Content-Transfer-Encoding', 'binary'); 
$this->getResponse()->setHttpHeader('Content-length',filesize($filename)) //send the size of the file
$this->getResponse()->setHttpHeader('Content-Type','some_mime_type') // e.g. application/pdf, image/png etc.
$this->getResponse()->setHttpHeader('Content-Disposition','attachment; filename='.$filename) //some filename
$this->getResponse()->sendHttpHeaders(); //edited to add the missed sendHttpHeaders
$this->getResponse()->setContent(readfile($filename));

$this->getResponse()->sendContent();

return sfView::NONE;

这两种方法都可以工作，并且不需要模板来呈现内容/文件

---

注意：在设置和发送内容之前，通过编辑添加

$this->getResponse（）->sendHttpHeaders（）

，您也可以使用普通的php函数：

public function executeIndex(sfWebRequest $request)
{
  while(ob_get_level())
  {
    ob_end_clean();
  }

  // use plain php functions to
  // setup headers
  // ...
  // and read and echo the file

  throw new sfStopException();
}

我喜欢的解决方案

$filePath = $document->getAbsoluteFilePath();
$mimeType = mime_content_type($filePath);

/** @var $response sfWebResponse */
$response = $this->getResponse();
$response->clearHttpHeaders();
$response->setContentType($mimeType);
$response->setHttpHeader('Content-Disposition', 'attachment; filename="' . basename($filePath) . '"');
$response->setHttpHeader('Content-Description', 'File Transfer');
$response->setHttpHeader('Content-Transfer-Encoding', 'binary');
$response->setHttpHeader('Content-Length', filesize($filePath));
$response->setHttpHeader('Cache-Control', 'public, must-revalidate');
// if https then always give a Pragma header like this  to overwrite the "pragma: no-cache" header which
// will hint IE8 from caching the file during download and leads to a download error!!!
$response->setHttpHeader('Pragma', 'public');
//$response->setContent(file_get_contents($filePath)); # will produce a memory limit exhausted error
$response->sendHttpHeaders();

ob_end_flush();
return $this->renderText(readfile($filePath));

---

无需使用模板文件。使用symfony标准行为。重要提示：模板文件必须存在

您是否尝试过使用

return$this->renderText（$response->getContent（））

而不是

返回sfView:：NONE

？读取文件的方法比将内容发送到视图要好，因为前者具有内置缓冲，而后者必须完全保存在内存中，因此速度较慢。

return$this->renderText（$response->getContent（））在我的情况下不起作用。它不会引发异常，但会从浏览器中引发一个“未找到文件”错误。您的第二个解决方案将正常工作，但会在错误日志中填入
PHP警告：无法修改标题信息-标题已发送
消息。因此，这不是一个真正好的解决方案。只有当您在sendContent（）之后使用die（）退出输出时，才会引发警告。哦，很抱歉，错过了
$this->getResponse（）->sendHttpHeaders（）
。我对答案进行了编辑，将其包括在内。这不是重点。使用
$this->getResponse（）->sendContent（）
您将发送头，除非您之前没有发送头，但是使用return语句imho将发送下一个头，然后抛出警告。好的，我不确定您在说什么。我先发送标题，然后再发送内容，没有收到任何PHP错误。你确定你的代码中没有发生其他事情吗？很好。注意模板文件实际上不需要存在。如果您使用模板配置模块，那么它必须存在。只有将它们设置为false或控制器为null，才不需要模板文件，否则将记录警告（之前发送的标题）