Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Building with Rack

Alexander Clark
February 23, 2016
Programming
2
130

Building with Rack

Let's build a Rack app!

Alexander Clark

February 23, 2016
Tweet

More Decks by Alexander Clark

See All by Alexander Clark
Off the Rails: Patterns for fixing fat models, out-of-controllers, and other Rails problems
alexanderclark
0
130
Docker: What It Is and Why You Should Care
alexanderclark
0
130

Other Decks in Programming

See All in Programming
IaC運用してみて感じた 素晴らしさとアンチパターン
yuki_kurono
0
170
V8 as a container on CDN Edge worker
mizchi
5
980
iOSのウィジェットでも猫走らせたい / iOSDC Japan 2022 Day2 Unconference
kyome22
3
530
Attacking web without JS - CSS injection
aszx87410
0
1.9k
PHPからC#のライブラリを呼べるようにしたdotnet_ffiを趣味でつくってみた
pgito
0
210
治っていくmbstring ㋿時代の文字化け
youkidearitai
0
380
Xcode Cloudの評価
kishikawakatsumi
2
330
react-reconcilerでオレオレReact Nativeを作ろう！
kwzr
0
460
Ruby Pattern Matching
bkuhlmann
0
470
watchOS におけるバックグラウンドタスクの限界
yamannnu
2
390
Swift Concurrency時代のiOSアプリの作り方
koher
13
1.9k
可觀測性(Observability)的實踐
marcustung
0
1.6k

Featured

See All Featured
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
270
12k
Clear Off the Table
cherdarchuk
79
290k
Automating Front-end Workflow
addyosmani
1351
200k
Unsuck your backbone
ammeep
659
55k
Practical Orchestrator
shlominoach
178
8.7k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
152
13k
Ruby is Unlike a Banana
tanoku
91
9.3k
Teambox: Starting and Learning
jrom
124
7.8k
Reflections from 52 weeks, 52 projects
jeffersonlam
337
18k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
351
21k
The World Runs on Bad Software
bkeepers
PRO
57
5.4k
Faster Mobile Websites
deanohume
294
29k

Transcript

  1. Building with Rack Alexander Clark

  2. What is Rack?

  3. ?

  4. None

  5. ?

  6. None

  7. ?

  8. ?

  9. What does a Rack app look like? ?

  10. What does a Rack app look like? GET /foo HTTP/1.1

    Host: localhost:9292 Accept: text/html … ?

  11. What does a Rack app look like? GET /foo HTTP/1.1

    Host: localhost:9292 Accept: text/html … ? <!DOCTYPE html> <html> <head> …

  12. run Proc.new { |env| ['200', {'Content-Type' => 'text/html'}, ['get rack\'d']]

    }

  13. run Proc.new { |env| ['200', {'Content-Type' => 'text/html'}, ['get rack\'d']]

    } Responds to #call HTTP Status code Headers Response body Run

  14. run Proc.new { |env| ['200', {'Content-Type' => 'text/html'}, ['get rack\'d']]

    } Responds to #call Much HTTP Status code Such Headers Response body Wow Run

  15. Let’s build something!

  16. None

  17. <!DOCTYPE html> <html> <head> <title>Is it April Fools?</title> </head> <body>

    <h1><%= @april_fools ? 'YES' : 'NO' %></h1> </body> </html>

  18. require 'erb' class MyRackApp def initialize @april_fools = Time.now.strftime('%m%d') ==

    '0401' end def call(_env) ['200', {'Content-Type' => 'text/html'}, view] end def view [ERB.new(template).result(binding)] end def template File.open('index.html.erb', 'r').read end end

  19. require './my_rack_app' run MyRackApp.new

  20. None

  21. ?

  22. run Proc.new { |env| ['200', {'Content-Type' => 'text/html'}, ['get rack\'d']]

    } run MyRackApp.new ... def call(_env) ['200', {'Content-Type' => 'text/html'}, view] end

  23. run MyRackApp.new run Rails.application

  24. Middleware

  25. TL;DL

  26. Further Reading • https://rack.github.io/ • http://alexander-clark.com/blog/building-a-rack-app/ • http://www.justinweiss.com/articles/a-web-server-vs- an-app-server/ •

    https://www.amberbit.com/blog/2011/07/13/ introduction-to-rack-middleware/

  27. Thanks for Listening Alexander Clark atheclark alexander-clark.com alexander-clark