Sinatra is a micro web framework built on top of Rack that uses RESTful routing and emphasizes URL design. It allows routing HTTP requests to code blocks, uses views and layouts to combine code and markup, and includes filters and helpers. Sinatra applications can be deployed on any server compatible with Rack.

1. Sinatra
Ryan Farnell (@criscokid)

2. What is Sinatra?

3. Micro Web Framework
• Built on top of Rack
• Uses RESTful thinking
• URL’s are king

4. Features
• Routing to code blocks
• Static Files
• Views/Layouts
• Filters
• Helpers

5. Routing To Blocks
• Routes made up of 3 basic parts
• HTTP Verb
• Match Expression
• Code block

6. HTTP Verbs
POST GET
PUT DELETE

7. Demo

8. Serving Public Files
• If
no matching URL was found, Sinatra checks
the public folder
• Public folder can be changed by setting :public
set :public,'path/to/file/static'

9. Viewsmarkup
• Views are mixes of code and
• Sinatra works with ERB, HAML, and Builder by
default
• Views are kept in a folder at the root of the site
called “views”
• View folder can be changed by setting :views
set :views,,'path/to/file/static'

10. Layout
• Layouts are like templates for all your pages.
• Bydefault looks for a file called “layout” in
views with the same extension as the view you
are rendering.
• Default name can be overridden.

11. Demo

12. Filters
• Filters run before all routes.
• Theycan modify the Request and Response
object.
• Any instance variable created in the before filter
is available in the route.

13. Helpers
• Small methods that you find useful.
• Available within the route and within the views.

14. Demo

15. Example Apps

16. Git-Wiki
http://atonie.org/2008/02/git-wiki

17. Rif-Graf
http://rifgraf.heroku.com/

18. Github-Services
http://github.com/pjhyett/github-services/tree/maste

19. Deployment
• Any server compatible with Rack
• Ruby Servers
• Mongrel
• Thin
• Webrick
• Apache running mod_rack (Phusion Passenger)
• FastCGI Server
• Apache
• Lighttpd

20. http://www.sinatrarb.com/

21. Q&A