用于下载文件的Ruby Sinatra应用程序(作为流式传输)

Question

我有一个sinatra应用程序,我想在其中进行下载功能.此下载从表中获取数据并为用户制作excel下载.

require 'csv'
get '/download' do 
     data = [{:name => "john", :age => 12, :state => 'ca'}, {:name => "tony", :age => 22, :state => 'va'}]

     # I want to download this data as excel file and the content of file should be as follows:
     # name,age,state
     # john,12,ca
     # tony,22,va
     # I don't want to save data as a temp file on the server and then throw to user for download 
     # rather I want to stream data for download on the browser. So I used this, 
     # but it is not working

     send_data (data, :type => 'application/csv', :disposition => 'attachment')
end

我究竟做错了什么？或者如何实现,我想做什么？我试图关注http://sinatra.rubyforge.org/api/classes/Sinatra/Streaming.html

更新:我没有和sinatra的send_data方法结婚.如果流式传输阻止我的服务器持续一段时间,那么我愿意接受替代方案.

Answer 1

get '/download' do 
    data = [{:name => "john", :age => 12, :state => 'ca'}, {:name => "tony", :age => 22, :state => 'va'}]

    content_type 'application/csv'
    attachment "myfilename.csv"
    data.each{|k, v|
       p v
    }
end

这适合我.我知道它不完整,因为我必须在带有换行符的excel文件中添加标题和逗号.但这很有效.