1. The Right Tool For the Job

2. Who am I?

4. @itchyankles

5. I need to build a server!

6. What do I do?!

7. So many choices
Django
Compojure
ASP.Net MVC
Spring
Sinatra
Scalatra
Meteor
Rails
Play
Cake
Liberator
Code Ignitor
Grails

9. What Makes Them Different?
•
Language
•
Performance
•
General Developer Speed
•
Library Support
•
Abstraction

10. Quick HTTP Break

11. What is HTTP?

12. Protocol
An established set of guidelines for
communication

13. Some Languages Have Nice
Built in Web Server Support

15. var http = require("http");
http.createServer(function(request,response){
response.write("Hello World");
response.end();
}).listen(8080);

17. package main
!
import (
"fmt"
"net/http"
)
!
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, "Hello, world!")
}
!
func main() {
http.HandleFunc("/", handler)
http.ListenAndServe(":8080", nil)
}

18. Ruby also has a built in server
library….

19. … but no one uses it.

21. Rack wraps HTTP in a very thin
Ruby layer

22. Rack
app = lambda do |env|
body = "Hello, World!"
[
200,
{
"Content-Type" => "text/plain",
"Content-Length" => body.length.to_s
},
[body]
]
end
!
run app

23. Weird, no?

24. Let’s Make this
Prettier

26. Sinatra
require 'sinatra'
!
get '/' do
"Hello World!"
end

27. And The Next Step?

29. Well there are other
alternatives, but let’s hold
off on those…

30. Let’s Compare, Shall
We?

31. Why Would We Ever
Use Rack?

32. With Great Power
Comes…

33. With Great Power
Comes…

34. So why does Sinatra
give us?

35. DSL
(Domain Specific
Language)

36. View Helpers!

37. A bit of convenience

39. So why does Rails
give us?

40. ActiveRecord
ActiveSupport
ActionView

42. Good News

44. Rails and Sinatra are
Popular!

45. Questions?!