slides for scotruby

config.ru

@@ -0,0 +1,5 @@
+require 'showoff'
+require './example'
+
+use Example
+run ShowOff

example.rb

@@ -0,0 +1,115 @@
+require 'sinatra/base'
+require 'capture_stdout'
+require 'escape_utils'
+require 'slim'
+require 'sass'
+require 'coffee-script'
+require 'eventmachine'
+
+class EventSource
+  include EventMachine::Deferrable
+
+  def send(data, id = nil)
+    data.each_line do |line|
+      line = "data: #{line.strip}\n"
+      @body_callback.call line
+    end
+    @body_callback.call "id: #{id}\n" if id
+    @body_callback.call "\n"
+  end
+
+  def each(&blk)
+    @body_callback = blk
+  end
+end
+
+class Example < Sinatra::Base
+  scope, line, subscribers = binding, 1, []
+  enable :inline_templates, :logging, :static
+  set :public, File.expand_path('../public', __FILE__)
+
+  def escape(data)
+    EscapeUtils.escape_html(data).gsub("\n", "<br>").
+      gsub("\t", "    ").gsub(" ", "&nbsp;")
+  end
+
+  get '/events.es' do
+    content_type request.preferred_type("text/event-stream", "text/plain")
+    body EventSource.new
+    subscribers << body
+    EM.next_tick { env['async.callback'].call response.finish }
+    throw :async
+  end
+
+  get('/events') { slim :html }
+  get('/events.js') { coffee :script }
+  get('/events.css') { sass :style }
+
+  post '/run' do
+    begin
+      result = nil
+      stdout = capture_stdout do
+        result = eval("_ = (#{params[:code]})", scope, "(irb)", line)
+        line += 1
+      end
+      stdout << "=> " << result.inspect
+    rescue Exception => e
+      stdout = [e.to_s, *e.backtrace.map { |l| "\t#{l}" }].join("\n")
+    end
+    source = escape stdout
+    subscribers.each { |s| s.send source, line }
+    ''
+  end
+end
+
+__END__
+
+@@ script
+
+$(document).ready ->
+  input  = $("#input")
+  log    = $("#log")
+  output = (str) ->
+    log.append str
+    log.append "<br>"
+    input.attr scrollTop: input.attr("scrollHeight")
+
+  $("#form").live "submit", (e) ->
+    value = input.val()
+    $.post '/run', code: input.val()
+    output "&gt;&gt; #{value}"
+    input.val ""
+    input.focus()
+    e.preventDefault()
+
+  src = new EventSource('http://localhost:9090/events.es')
+  src.onmessage = (e) -> output e.data
+
+@@ html
+html
+  head
+    title brirb
+    link href="/events.css" rel="stylesheet" type="text/css"
+    script src="/jquery.min.js" type="text/javascript"
+    script src="/events.js" type="text/javascript"
+  body
+    #log
+    form#form
+      | &gt;&gt;&nbsp;
+      input#input type='text'
+
+@@ style
+body
+  font:
+    size: 200%
+    family: monospace
+  input#input
+    font-size: 100%
+    font-family: monospace
+    border: none
+    padding: 0
+    margin: 0
+    width: 80%
+    &:focus
+      border: none
+      outline: none

intro/00_intro.md

@@ -6,6 +6,14 @@
 !SLIDE bullets
 # Me #
 
+* Potsdam/Berlin, Germany
 * [rkh.im](http://rkh.im/), [github/rkh](http://github.com/rkh), [@konstantinhaase](http://twitter.com/konstantinhaase)
+* Student at Hasso Plattner Institute
 * Ruby dev at [Finnlabs](http://finn.de)
-* Sinatra, Rubinius, Rack
+
+!SLIDE bullets smallcode
+# Me #
+
+* Sinatra, tons of small libs
+* Tilt, Rubinius, Rack, Rails, ...
+* ![almost-sinatra](almost-sinatra.png)

showoff.json

@@ -1,5 +1,5 @@
 {
-  "name": "No Title",
+  "name": "Real Time Rack",
   "sections": [
     { "section": "intro"  },
     { "section": "slides" },