Rack
Middleware
Tuesday, March 17, 2009

\\m/
Tuesday, March 17, 2009

NEED
Tuesday, March 17, 2009

CHOICE
Tuesday, March 17, 2009

Jon Crosby
http://joncrosby.me
Tuesday, March 17, 2009

CloudKit
http://getcloudkit.com
Tuesday, March 17, 2009

rack-contrib
http://github.com/rack/rack-contrib
Tuesday, March 17, 2009

Tuesday, March 17, 2009

Engine Yard Solo
“The platform for
on-demand management of your
Ruby on Rails application
in the cloud.”
Tuesday, March 17, 2009

Free during HackFest
Tuesday, March 17, 2009

Discount for Sign Up
Tuesday, March 17, 2009

CGI
Tuesday, March 17, 2009

app.cgi
Tuesday, March 17, 2009

WARNING
Tuesday, March 17, 2009

Contains Perl
Tuesday, March 17, 2009

old skool perl cgi
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

if ($cgi->param(‘action’) eq ‘all’) {
my $sql = “select * from customer”;
my $rows =
$dbh->selectall_arrayref($sql);
if (@$rows) {
print “<table border=1>” .
“<th>name</th>” .
...
Tuesday, March 17, 2009

Monolith
Tuesday, March 17, 2009

:-(
Tuesday, March 17, 2009

Rails
Tuesday, March 17, 2009

Merb
Sinatra
Mack
Ramaze
Waves
Tuesday, March 17, 2009

Authentication
Tuesday, March 17, 2009

Single Sign-On
Tuesday, March 17, 2009

Caching
Tuesday, March 17, 2009

Authentication Example:
OpenID + OAuth
Tuesday, March 17, 2009

Install Auth Plugin(s)
Tuesday, March 17, 2009

Install Auth Plugin(s)
Generate Controllers
Tuesday, March 17, 2009

Install Auth Plugin(s)
Generate Controllers
Generate Models
Tuesday, March 17, 2009

Install Auth Plugin(s)
Generate Controllers
Generate Models
Generate Migrations
Tuesday, March 17, 2009

Install Auth Plugin(s)
Generate Controllers
Generate Models
Generate Migrations
Modify Existing Controllers
Tuesday, March 17, 2009

Install Auth Plugin(s)
Generate Controllers
Generate Models
Generate Migrations
Modify Existing Controllers
Monkey Patch Rails
Tuesday, March 17, 2009

:-(
Tuesday, March 17, 2009

The Web
Tuesday, March 17, 2009

Tuesday, March 17, 2009

HTTP
Tuesday, March 17, 2009

Intermediaries
HTTP
Tuesday, March 17, 2009

Intermediaries App
HTTP
Tuesday, March 17, 2009

Intermediaries App
HTTP
Tuesday, March 17, 2009

Rack
Tuesday, March 17, 2009

Tuesday, March 17, 2009

HTTP
Tuesday, March 17, 2009

Intermediaries
HTTP
Tuesday, March 17, 2009

Middleware
HTTP
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

Rack is the Web
Tuesday, March 17, 2009

The Web is Rack
Tuesday, March 17, 2009

WSGI
Tuesday, March 17, 2009

SPEC
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

run lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

config.ru
Tuesday, March 17, 2009

$ rackup config.ru
Tuesday, March 17, 2009

$ curl http://localhost:9292
Tuesday, March 17, 2009

Hello
Tuesday, March 17, 2009

class App
def call(env)
[200, {...}, [...]]
end
end
Tuesday, March 17, 2009

SPEC
Tuesday, March 17, 2009

$ rake SPEC
Tuesday, March 17, 2009

Rack::Lint
Tuesday, March 17, 2009

lambda { |env|
[
200,
{
‘Content-Type’ => ‘text/plain’,
‘Content-Length’ => ‘5’
},
[‘Hello’]
]
}
Tuesday, March 17, 2009

env
Tuesday, March 17, 2009

REQUEST_METHOD
Tuesday, March 17, 2009

env[‘REQUEST_METHOD’]
Tuesday, March 17, 2009

GET
PUT
POST
DELETE
HEAD
OPTIONS
TRACE
Tuesday, March 17, 2009

PATH_INFO
Tuesday, March 17, 2009

/items/123
Tuesday, March 17, 2009

HTTP_*
Tuesday, March 17, 2009

HTTP_ACCEPT
Tuesday, March 17, 2009

application/json
Tuesday, March 17, 2009

rack.*
Tuesday, March 17, 2009

rack.input
(the input stream)
Tuesday, March 17, 2009

#gets
#each
#read
#rewind
Tuesday, March 17, 2009

yournamespace.*
Tuesday, March 17, 2009

request = Rack::Request.new(env)
Tuesday, March 17, 2009

request.post?
Tuesday, March 17, 2009

request.params[‘id’]
Tuesday, March 17, 2009

request[‘HTTP_IF_MATCH’]
Tuesday, March 17, 2009

\\m/
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

use MiddlewareA
use MiddlewareB
use MiddlewareC
run app
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

rack-contrib
http://github.com/rack/rack-contrib
Tuesday, March 17, 2009

Rack::Profiler
Tuesday, March 17, 2009

Rack::MailExceptions
Tuesday, March 17, 2009

Rack::JSONP
Tuesday, March 17, 2009

Rack::CSSHTTPRequest
Tuesday, March 17, 2009

Rack::Cache
http://github.com/rtomayko/rack-cache
Tuesday, March 17, 2009

Rack::NotFound
Tuesday, March 17, 2009

404
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

use MiddlewareA
use MiddlewareB
use MiddlewareC
run app
Tuesday, March 17, 2009

class App
def call(env)
[200, {...}, [...]]
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

class GoSlower
def initialize(app)
@app = app
end
def call(env)
sleep(1)
@app.call(env)
end
end
Tuesday, March 17, 2009

use MiddlewareA
use MiddlewareB
use MiddlewareC
run app
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

Cooperative Middleware
Tuesday, March 17, 2009

URI Space
Tuesday, March 17, 2009

/*
Tuesday, March 17, 2009

/just-what-it-needs
Tuesday, March 17, 2009

CloudKit
Tuesday, March 17, 2009

Open Web
JSON
Appliance
Tuesday, March 17, 2009

expose :notes, :todos
Tuesday, March 17, 2009

expose :notes, :todos
Tuesday, March 17, 2009

contain :notes, :todos
Tuesday, March 17, 2009

use Rack::Pool::Session
use CloudKit::OAuthFilter
use CloudKit::OpenIDFilter
use CloudKit::Service, :collections => [:notes, :todos]
(run DefaultApp)
Tuesday, March 17, 2009

CloudKit::OAuthFilter
/oauth/*
Tuesday, March 17, 2009

CloudKit::OpenIDFilter
/login
/logout
/openid_complete
Tuesday, March 17, 2009

CloudKit::Service
/notes/*
/todos/*
Tuesday, March 17, 2009

?
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
{...}
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
{...}
Login
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Browser
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
{...}
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
{...}
Login
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Service or Desktop App
OAuth OpenID Service
Tuesday, March 17, 2009

Announcing
Middleware
Presence
Tuesday, March 17, 2009

HTTP
Via
Tuesday, March 17, 2009

Via: 1.0 ricky, 1.1 ethel, 1.1 fred
Tuesday, March 17, 2009

Via: 1.0 ricky, 1.1 ethel, 1.1 fred
Tuesday, March 17, 2009

Via: 1.0 ricky, 1.1 ethel, 1.1 fred
Tuesday, March 17, 2009

Via: 1.0 ricky, 1.1 ethel, 1.1 fred
Tuesday, March 17, 2009

env[‘cloudkit.auth’] = 1
Tuesday, March 17, 2009

env[‘cloudkit.via’] << ‘cloudkit.filter.oauth’
Tuesday, March 17, 2009

env[‘cloudkit.via’] << ‘cloudkit.filter.openid’
Tuesday, March 17, 2009

env[‘cloudkit.user’] = ‘http://joncrosby.me’
Tuesday, March 17, 2009

Alternative Stacks
Tuesday, March 17, 2009

Rack::Map
Tuesday, March 17, 2009

map “/” do
run Blog::Public
end
map “/db” do
run Blog::DBAdmin
end
Tuesday, March 17, 2009

Rack::Map + Sinatra
Tuesday, March 17, 2009

require ‘sinatra/base’
module Blog
class Public < Sinatra::Base
get ‘/’ do
erb :index
end
end
end
Tuesday, March 17, 2009

require ‘sinatra/base’
module Blog
class Public < Sinatra::Base
get ‘/’ do
erb :index
end
end
end
Tuesday, March 17, 2009

require ‘sinatra/base’
module Blog
class Public < Sinatra::Base
get ‘/’ do
erb :index
end
end
end
Tuesday, March 17, 2009

require ‘sinatra’
for “apps”
/* URI space
Tuesday, March 17, 2009

require ‘sinatra/base’
MyClass < Sinatra::Base
Minimal Sinatra (routing, rendering, etc.)
Tuesday, March 17, 2009

\\m/
Tuesday, March 17, 2009

use MySinatraApp
run SomeOtherApp
Tuesday, March 17, 2009

Rack::Cascade
Tuesday, March 17, 2009

app1 = lambda { ... }
app2 = lambda { ... }
run Rack::Cascade.new([app1, app2])
Tuesday, March 17, 2009

Sinatra as Middleware
in Rails
Tuesday, March 17, 2009

class X < Sinatra::Base
get ‘/what’ do
‘what’
end
end
Rails::Initializer.run do |config|
config.use.middleware ‘X’
end
Tuesday, March 17, 2009

CloudKit in Rails
Tuesday, March 17, 2009

Rails::Initializer.run do |config|
config.use.middleware ‘CloudKit::Service’, :collections => [:notes, :todos]
end
Tuesday, March 17, 2009

Middleware App
HTTP
Tuesday, March 17, 2009

Middleware App
Rails
HTTP
Tuesday, March 17, 2009

Middleware App
Rails Merb
HTTP
Tuesday, March 17, 2009

Middleware App
Rails Merb *
HTTP
Tuesday, March 17, 2009

New Unit of Composition
Tuesday, March 17, 2009

\\m/
Tuesday, March 17, 2009