main.rb

require 'rubygems'
require 'sinatra'

get '/' do
  haml :index
end

post '/' do
  @error = true
  @name = params[:file][:filename]
  file = params[:file][:tempfile]

  if !file.nil? || !file.empty?
    if FileUtils.mv(file.path, "/home/voldern/web/dump/public/f/#{@name}")
      @error = false
    end
  end

  haml :index
end

get '/f' do
  @files = Array.new
  path = 'public/f/'
  dir = path.split('/')[1] + '/'

  foo = Dir.glob(path + '*')
  foo.each do |f|
    name = f.split('/')[2]
    size = File.size(path + name)
    time = File.mtime(path + name)
    @files << { :name => name, :path => dir + name, :size => size, :time => time }
  end

  haml :files
end

use_in_file_templates!

__END__

@@ layout
!!!
%html
  %head
    %title Dump
  %body
    = yield

@@ index
%h1 Dump

- if !@error.nil? && !@error 
  %p 
    The file named
    %a{:href => "f/#{@name}" % @name}= @name
    was uploaded successfully

%form{:method => 'post', :enctype => 'multipart/form-data'}
  %input{:type => 'file', :name => 'file'}/
  %input{:type => 'submit', :value => 'Upload!'}/

@@ files
%h1 Files
- for file in @files.reverse
  %p
    %a{:href => file[:path]}== - #{file[:name]}
    == [#{file[:size]} bytes]
    == #{file[:time]}