使用send_file設置內容類型

我需要爲Apple通用鏈接發送具有特定內容類型（application/pkcs7-mime）的文件。我使用rails的send_file函數，並添加:type作爲參數，但類型始終爲text/plain。使用send_file設置內容類型

這裏是我的控制器：

class AppleController < ApplicationController 
    def download_app_site_association 
    send_file "#{Rails.root}/public/apple-app-site-association", {:filename => "apple-app-site-association", :type => "application/pkcs7-mime" , :x_sendfile => true} 
    end 
end

我也嘗試添加這樣的：

send_file "#{Rails.root}/public/apple-app-site-association", :filename => "apple-app-site-association", :type => "application/pkcs7-mime" , :x_sendfile => true

和手動設置它像這樣：

response.headers["Content-type"] = "application/pkcs7-mime" 
send_file "#{Rails.root}/public/apple-app-site-association", :filename => "apple-app-site-association", :x_sendfile => true

誰能給我解釋一下爲什麼這不起作用？

來源

2016-03-21 Shrolox