Cakephp 2.3.x发送文件并强制下载mp4文件 [英] Cakephp 2.3.x Sending Files and forcing the download of a mp4 file

问题描述

我正在使用cakephp 2.3.1

我要强制下载一个mp4档案，每 http://book.cakephp.org/2.0/en/controllers/request-response.html#cake-response-file

在我的'view'我有以下代码，它正确地搜索文件名，并找到文件名，并显示下载链接：

 <？php $ filename = APP。 'webroot / files /'。 $ dance ['Dance'] ['id']。 '.mp4'; 
 if（file_exists（$ filename））{
 echo $ this-> Html-> link（'DOWNLOAD'，array（'controller'=>'dances'，'action'=> ;'sendFile'，$ dance ['Dance'] ['id']））; 
} else {
 echo'即将推出：4月16日可用; 
} 
？> 
  

当用户点击链接时，我想强制下载mp4文件。在我的控制器我有以下代码不工作：

  public function sendFile（$ id）{
 $ file = $ this-> Attachment-> getFile（$ id）; //注意：我不明白'Attachment'和'getFile（$ id）'
 $ this-> response-> file（$ file ['webroot / files /']，array下载'=> true，'name'=>'Dance'））; 
 //返回reponse对象以防止控制器尝试呈现视图
 return $ this-> response; 
} 
  

我不明白'Attachment'和'getFile / p>

我得到以下错误：
错误：调用成员函数getFile（）在非对象

$

解决方案

p>你不明白的那一行只是示例的一部分 - 假设应用程序有一个名为 Attachment 的模型，并且它有一个名为 getFile 。因为你没有一个 Attachment 模型（或至少它是不可见的控制器）你得到一个调用成员函数非对象错误。这不重要，虽然：你需要担心的是提供一个完整的系统路径 this-> response-> file（）。在你的例子中，你可能通过改变这一行到：

  $ this-> response-& WWW_ROOT.'files /'。$ id。'。mp4'，array（'download'=> true，'name'=>'Dance'））; 
  

您可以移除 $ this-> Attachment-> getFile 行，因为它与您的情况无关。

让我知道如果有帮助！

I'm using cakephp 2.3.1

I want to force download a mp4 file per http://book.cakephp.org/2.0/en/controllers/request-response.html#cake-response-file

In my 'view' I have the following code which is correctly searching for the filename, and finding the file name, and displaying the download link:

<?php $filename = APP . 'webroot/files/' . $dance['Dance']['id'] . '.mp4'; 
if (file_exists($filename)) {
    echo $this->Html->link('DOWNLOAD', array('controller' => 'dances', 'action' => 'sendFile', $dance['Dance']['id'])); 
    } else {
    echo 'Coming soon: available April 16th';
    }
?>

When the user clicks on the link I want to force the download of the mp4 file. In my controller I have the following code that doesn't work:

public function sendFile($id) {
    $file = $this->Attachment->getFile($id); //Note: I do not understand the 'Attachment' and the 'getFile($id)'
    $this->response->file($file['webroot/files/'], array('download' => true, 'name' => 'Dance'));
    //Return reponse object to prevent controller from trying to render a view
    return $this->response;
}   

I don't understand 'Attachment' and the 'getFile()'

I'm getting the following error: Error: Call to a member function getFile() on a non-object

What am I doing wrong and is there any other documentation I can be looking at to understand this better?

解决方案

The line you don't understand is simply part of the example - it assumes the application has a model called Attachment and that it has a method called getFile. Since you don't have an Attachment model (or at least it isn't visible to the controller) you get a "call to member function on a non-object" error. That's not important though: all you need to worry about is providing a full system path to this->response->file(). In your example, you can probably get that by changing that line to:

$this->response->file(WWW_ROOT.'files/'. $id .'.mp4', array('download' => true, 'name' => 'Dance'));

You can get rid of the $this->Attachment->getFile line as it is irrelevant in your case.

Let me know if that helped!

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