如何使用GRAPE API允许二进制文件下载

问题描述

我想允许使用ruby的Grape API下载二进制文件(.p12文件).这就是我正在尝试的.

I want to allow downloading a binary file (.p12 file) using ruby's Grape API. This is what I am trying.

get '/download_file' do
  pkcs12 = generate_pkcsfile
  content_type('application/octet-stream')
  body(pkcs12.der)
end

使用ActionController的等效代码为

The equivalent code using ActionController is

begin
  pkcs12 = generate_pkcsfile
  send_data(pkcs12.der,
            :filename => 'filename.p12')
end

问题在于，使用API​​下载的文件似乎是每个字符都嵌入了'\ ufffd'前缀的文本文件，而使用浏览器下载的文件似乎是二进制文件.如何使用GRAPE API框架来下载与通过ActionController的send_data下载的文件相同的文件

The problem is the file downloaded using the API seems to be a text file with a '\ufffd' prefix embedded for every character, whereas the file downloaded using the browser seems to be binary file. How do I use the GRAPE API framework to allow downloading the same file that is downloaded via ActionController's send_data

推荐答案

存在问题#412 和#418 已报告到grape github页面.与返回二进制文件和覆盖内容类型有关.

There are issues #412 and #418 have been reported to grape github page.Which are related to return a binary file and override content type.

要返回二进制格式，如下所示:

To return binary format like so:

get '/download_file' do
    content_type "application/octet-stream"
    header['Content-Disposition'] = "attachment; filename=yourfilename"
    env['api.format'] = :binary
    File.open(your_file_path).read
end

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