强制链接下载MP3而不是播放？

Ive got an anchor link

我有一个锚链接

<a href="http://bucket_name.amazonaws.com/uploads/users/4/songs/7/test.mp3">Download</a> 

How do I make it so when a user clicks on it, it actually opens a popup asking the user to save the file instead of trying to play the file on the browser?

当用户点击它时，如何实现它，它实际上会打开一个弹出窗口，要求用户保存文件而不是尝试在浏览器上播放文件？

EDIT:

编辑：

I was reading this article.

我正在读这篇文章。

  def download
    data = open(Song.first.attachment)
    send_data data.read, :type => data.content_type, :x_sendfile=>true
  end

The article suggest using x_sendfile, since send_file takes up an http process with the potential risk of hanging the app until the download is completed.

本文建议使用x_sendfile，因为send_file会占用一个http进程，可能会挂起应用程序直到下载完成。

Second, I am using send_data instead of send_file, which seems to work if the file is remote (i.e. hosted on Amazon S3). As suggested by this article.

其次，我使用send_data而不是send_file，如果文件是远程的（即在Amazon S3上托管），这似乎有效。正如本文所述。

The article, I mentioned was posted on 2009. Is x_sendfile=>true still necessary? Will it hang the app if it isn't included?

我提到的这篇文章是在2009年发布的。是否还需要x_sendfile => true？如果不包含应用程序，它会挂起吗？

Should I really be using send_data or send_file?

我真的应该使用send_data还是send_file？

3 个解决方案

#1

You can manage your file downloading with separate controller, if you don't want to eal with HTTP server configurations.

如果您不想使用HTTP服务器配置，则可以使用单独的控制器管理文件下载。

So you can send_file with disposition option as attachment.

因此，您可以将带有处置选项的send_file作为附件。

#2

Depends on how you / where you serve the file itself. I do not have experience with ruby but if you can alter the headers(most platforms offer this option) of the http response you can force a download. This requires:

取决于您/文件本身的服务方式。我没有使用ruby的经验，但如果您可以更改http响应的标题（大多数平台提供此选项），您可以强制下载。这需要：

Content-Type: application/force-download

I guess it will use "Content-type: application/octet-stream" by default which will cause the browser to play it.

我猜它默认会使用“Content-type：application / octet-stream”，这会导致浏览器播放它。

But this will only work if you have control over the server/location that holds the actual file since you need to change the response when the file is sent to the browser.

但这只有在您控制保存实际文件的服务器/位置时才有效，因为您需要在将文件发送到浏览器时更改响应。

#3

Skip The Controller Action

You don't even need the download controller action, you can just generate a download-friendly link like so:

您甚至不需要下载控制器操作，您只需生成一个下载友好的链接，如下所示：

In your attachment.rb

def download_url
  S3 = AWS::S3.new.buckets[ 'bucket_name' ] # This can be done elsewhere as well,
                                            # e.g config/environments/development.rb

  url_options = { 
    expires_in:                   60.minutes, 
    use_ssl:                      true, 
    response_content_disposition: "attachment; filename=\"#{file_name}\""
  }

  S3.objects[ self.path ].url_for( :read, url_options ).to_s
end

In your views

<%= link_to 'Download Avicii by Avicii', attachment.download_url %>

If you still wanted to keep your download action for some reason then just use this:

如果由于某种原因仍想保留下载操作，请使用以下命令：

In your attachments_controller.rb

def download
  redirect_to @attachment.download_url
end

Thanks to guilleva for his guidance.

感谢guilleva的指导。