Seven Web Frameworks in Seven Weeks, Week 1: Sinatra

Week 1, Day 1

• set up repository https://github.com/drblinken/7web
• added rvm setup, see http://drblinken.github.io/bentos/rvm.html
• added Gemfile
• used transpec gem to automatically update rspec to new expect() syntax: https://github.com/yujinakayama/transpec
• added the db to gitignore

Source Code

/hello - hello world
/crud - simple crud rest backend using data mapper

Links

• W3C http method definitions http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html
• W3C http return code definitions http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

Self-Study

Find:

• Sinatra doc: http://www.sinatrarb.com/documentation.html
• DataMapper: http://datamapper.org

Do:

• test was already there!
• added creation_date to Bookmark
• handler for bookmarks sorted by creation_date

Urls to open

http://localhost:4567/bookmarks/1

Week 1, Day 2

Templating languages: erb, slim (a bit like haml but cleaner), mustache (with {} like liquid, no logic in the template).

Self-Study

Find:

• Templating alternatives: There are quite a lot.

Do:

• does respond_with work with slim and mustache?

Does work with slim, apparently not with mustache, maybe because it’s not known to Sinatra? http://www.sinatrarb.com/contrib/respond_with.html

Week 1, Day 3

Self-Study

Find:

• Documentation for finding a custom route matcher

• Real-World Apps that use Sinatra are listed on the sinatra page, Travis, LinkedIn,

• Pedro Belo writes about when to use Rails (Web App) and when Sinatra (API); and makes a point that maybe you shouldn’t mix the two in one application.

Do:

• create and retrieve bookmarks with tags with curl: in /sinatra/validation

  curl -d “url=http://xxx.de&title=INFRA&tagsAsString=A,B,C” http://localhost:4567/bookmark

  curl http://localhost:4567/bookmarks/A/B

  curl -i -H “Accept: application/json” http://localhost:4567/bookmarks

• write test to verify updating of bookmarks with tags: Already present: “Bookmarking App creates and updates a bookmark with tags”

• add tag support to the view templates of your choice.

…learned more about curl

Dump Headers

curl -D headers http://localhost:4567

send accept type

curl -H "Accept: application/json" http://localhost:4567/bookmarks

and get header info

curl -i -H "Accept: application/json" http://localhost:4567/bookmarks

more to copy

curl -H “Accept: text/html” http://localhost:4567/bookmarks -H “Accept: application/json”

• run a single example in rspec

  rspec app_test.rb -e “gets a single bookmark in JSON”

Added Capybara, see http://blog.orenyk.com/2014/03/11/testing-sinatra-apps-with-rspec-and-capybara/