如何从 WEBrick 表单上传创建图像文件

Question

不确定如何将 FormData 转换为实际文件。具体来说，一张图片

class Post < WEBrick::HTTPServlet::AbstractServlet
  def do_GET(request, response)
    File.new("1.png") if request.query["image"]
    # request.query["image"] is a FormData object
    # how do I interpret it and turn it into a usable file?
  end
end

..后来在服务器挂载上使用

server.mount '/post', Post

Answer 1

来自blog post：

def do_POST(req, res)
  filedata= req.query["filename"]

  f = File.open("foo.out", "wb")
  f.syswrite filedata
  f.close

  puts "Saved file OK"
end