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

Building with Rack

4109276dec776c9999af7ba023d902b6?s=47 Alexander Clark
February 23, 2016
Programming
2
58

Building with Rack

Let's build a Rack app!

4109276dec776c9999af7ba023d902b6?s=128

Alexander Clark

February 23, 2016
Tweet

More Decks by Alexander Clark

See All by Alexander Clark
4109276dec776c9999af7ba023d902b6?s=48 alexanderclark
0
55
4109276dec776c9999af7ba023d902b6?s=48 alexanderclark
0
48

Other Decks in Programming

See All in Programming
B9012970f22b84c5b344ffa6f8a884d5?s=48 camaelon
0
150
B05baacb6000fe55fe558ce75aa9bc74?s=48 jdkfx
0
110
47e8496b5cc69a2ac8bf5e99d03fd8cf?s=48 yasuohosotani
0
130
6885b1c7fe50f4c0a23775b7b94ebd94?s=48 nosuke0926
0
130
F172ce6f89fdaae222055bd3625960bd?s=48 croe
0
140
4578d99b560b2a470e05288ef6766ac2?s=48 paulk
5
2.1k
3499a1d71fa70b8ee44816ca9e7329fe?s=48 bells17
1
450
F0012066f4fad79deb33bf5e9799b557?s=48 francescostrazzullo
0
130
2102a6b8760bd6f57f672805723dd83a?s=48 line_developers_tw
PRO
0
140
D9455a5dc3e3ea4fcca207da70c306b0?s=48 murabayashi
0
1.2k
098ad475722e3697ec2fba28c8654f9f?s=48 yuhta28
0
530
42a6a049ac8f5265f31858a9509217fb?s=48 uhooi
1
470

Featured

See All Featured
A16eb159db895e3b01d3dc95767ad595?s=48 jonyablonski
35
1.6k
6804f1775cb4babfcc3851298566fbce?s=48 tanoku
91
8.8k
Ba530e786553390f3fb271848485681c?s=48 3n
167
22k
5f83ef806155b403c3393160ce51f955?s=48 jlugia
218
16k
Fde6c3a50ca518a909ef35c22c0ee0e4?s=48 destraynor
225
48k
2f5463832ccb768ccb4a1ca3607c27ef?s=48 jacobian
260
20k
0c6fd6a08d0f898159cda7cafcacf07f?s=48 afnizarnur
180
14k
761be20b5ebd271008bcee1244fc5b52?s=48 matthewcrist
73
7.6k
D47656e20ff5e42f125fc5ea0fd636c6?s=48 tmm1
64
10k
F716e5f737fcfb03f2cf8d1a184f1dbe?s=48 nonsquared
83
3.6k
Ded01cdab114abe4ec13511e4c25b9bb?s=48 andyhume
66
4.1k
5b6a2bd86ef643786a381a212e0ef2f1?s=48 geoffreycrofte
39
1.3k

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