pjax sample. try: wget http://l.udr.me/qpuY4c -O pjax-sinatra.rb && ruby pjax-sinatra.rb

pjax-sinatra.rb

require 'sinatra'
require 'haml'

class Sinatra::Request
  def pjax?
    env['HTTP_X_PJAX'] || self["_pjax"]
  end
end

get '/' do
  haml "%p this is index...", :layout => !request.pjax?
end

get '/akubi' do
  haml "%img{src: 'http://udzura.jp/images/150709359.jpg'}", :layout => !request.pjax?
end

get '/:name' do
  haml <<"EOT", :layout => !request.pjax?
%p Hello, #{params[:name]}!
%p= Time.now.strftime("You loaded this part at %Y/%m/%d %H:%M:%S.")
EOT
end

__END__

@@layout
!!! 5
%html
  %head
    %title sample
    %script{type: 'text/javascript', src: "http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"}
    %script{type: 'text/javascript', src: "http://pjax.heroku.com/jquery.pjax.js"}
  %body
    %div{style: "width: 20%; border: solid; padding: 1em; float:left;"}
      %p= Time.now.strftime("You loaded a whole page at %Y/%m/%d %H:%M:%S.")
      %ul
        %li
          %a{href: "/", class: "pjax"} Home
        %li
          %a{href: "/akubi", class: "pjax"} Akubi
        %li
          %a{href: "/Hoge", class: "pjax"} Hoge
        %li
          %a{href: "/Fuga", class: "pjax"} Fuga
    %div{style: "width: 40%; border: solid; padding: 1em; float: left; margin-left: 1em;", id: "target"}
      = yield
    %script $("a.pjax").pjax("#target");