example for big-upload

app.rb

require 'sinatra'
require 'yajl/json_gem'

set(:mongrel2_upload) do |value|
  condition do
    case value
    when :start
      request.env.key?('x-mongrel2-upload-start')
    when :done
      request.env.key?('x-mongrel2-upload-done')
    else
      false
    end
  end
end

before do
  p request # no x-mongrel2-upload-* headers?
end

put '/ok', :mongrel2_upload => :done do
  puts 'ok done'
  send_file request['x-mongrel2-upload-done'] # show the uploaded file
end

put '/ok', :mongrel2_upload => :start do
  puts 'ok start'
  throw :async # continue the upload
end

put '/ng', :mongrel2_upload => :done do
  puts 'ng done'
  send_file request['x-mongrel2-upload-done'] # this will never happen.
end

put '/ng', :mongrel2_upload => :start do
  puts 'ng start'
  '' # cancel the upload
end