How to read form-data with ruby - ruby-on-rails

Question

In my controller the result of request.body.read is:
=============
--AJAX-----------------------1267183973160
Content-Disposition: form-data; name="1261400603_page_white_word.png"; filename="1261400603_page_white_word.png"
Content-Type: application/octet-stream
thefile
--AJAX-----------------------1267183973160
Content-Disposition: form-data; name="1261400536_page_white_excel.png"; filename="1261400536_page_white_excel.png"
Content-Type: application/octet-stream
thefile
--AJAX-----------------------1267183973160--
=============
It contains n form-data (2 in my example), my goal is to loop through the n form-data and get the data name, filename and a file uploaded, in my example I replaced the binary data by thefile.
here is the content of the params hash
{"action"=>"create", "controller"=>"photos", "1265144945_395.jpg"=>#<File:/var/folders/BT/BTpdsWBkF6myaI-sl3+1NU+++TI/-Tmp-/RackMultipart20100226-273-1un364r-0>}
Cheers

Answer 1

Have you considered using paperclip or attachment_fu? They are battle-tested and will do better than using request.body. In any case, you could parse request.body as follows but it's not the best solution.
inputs = request.body.read.split(/--ajax-+\d+-*/mi)
inputs.each do |input|
input.scan(/(.*)[\n\r]{2,4}(.*)/m) do |header, file|
header.scan(/name=["'](.*)["'];\s+filename=["'](.*)["']/) do |name, filename|
puts name
puts filename
end
puts file
end
end
Edit: So that params parsing is probably the job of Rack::Utils::Multipart.parse_mulitpart. One should probably reuse the regex's from the source of that to parse this a bit more robustly. Also, it looks like rack is creating a tmp file for you of some sort. Can you check the contents of that file?