Idiot simple http file uploader written by ruby. It requires sinatra.

uploader.rb

# WARNING: This script has an enormous vulnerability!!!!!!

require 'sinatra'

get '/' do
  erb <<"HTML"
<form action="upload" method="POST" enctype="multipart/form-data">
<input type="file" name="file" />
<input type="submit" value="Upload" />
</form>
HTML
end

post '/upload' do
  filename = params[:file][:filename]
  file = params[:file][:tempfile]

  File.open(filename, 'wb') do |f|
    f.write(file.read)
  end

  erb <<"HTML"
OK
HTML
end