Nancy

Sinatra's little daughter

Frank and Nancy by classic film scans

Description

Minimal Ruby microframework for web development inspired in Sinatra and Cuba

Installation

Install the gem:

$ gem install nancy

or add it to your Gemfile:

gem "nancy"

Usage

Here's a simple application:

# hello.rb
require "nancy"

class Hello < Nancy::Base
  use Rack::Session::Cookie, secret: ENV['SECRET_TOKEN'] # for sessions
  include Nancy::Render # for templates

  before do
    if request.path_info == "/protected" && !session[:authenticated]
      halt 401, "unauthorized"
    end
  end

  after do
    if request.path_info ~= /\.json$/
      response['Content-Type'] = 'application/json'
    else
      response['Content-Type'] = 'text/html'
    end
  end

  get "/" do
    "Hello World"
  end

  get "/hello" do
    response.redirect "/"
  end

  get "/hello/:name" do
    "Hello #{params['name']}"
  end

  post "/hello" do
    "Hello #{params['name']}"
  end

  get "/template" do
    @message = "Hello world"
    render("views/hello.erb")
  end

  post "/login" do
    @user = User.find(params['username'])
    halt 401, "unauthorized" unless @user.authenticate(params['password'])
    session[:authenticated] = true
    render("views/layout.erb") { render("views/welcome.erb") }
  end

  get "/protected" do
    "Protected area!!!"
  end

  get "/users/:id.json" do
    @user = User.find(params['id'])
    halt 404 unless @user
    UserSerializer.new(@user).to_json
  end

  map "/resque" do
    run Resque::Server
  end

  map "/nancy" do
    run AnotherNancyApp.new
  end
end

To run it, you can create a config.ru file:

# config.ru
require "./hello"

run Hello.new

You can now run rackup and enjoy what you have just created.

Check examples folder for a detailed example.

Features

Very fast
"Sinatra-like" routes: support for get, post, put, patch, delete, options, head
Template rendering and caching through Tilt or ERB from stdlib
Set basic filters/callbacks with the before/after methods
Include middlewares with the use method
Mount rack apps with the map method
Sessions through Rack::Session
Halt execution at any point using Ruby's throw/catch mechanism
Thread-safe

Version history

0.4.0 (unreleased)

Added support for basic before/after filters
Added Nancy::BasicRender for rendering of templates using ERB from stdlib
Refactored full code to set proper accessors for all methods
Removed Nancy::Base.call, only instances can be used to run apps
Removed redirect helper, use instead response.redirect '/uri'
Removed tilt dependency, to use Nancy::Render add it manually to app
Nancy::Base#halt can't be used with a Rack::Response object anymore

0.3.0 (Octuber 3, 2012)

Removed unneccesary Thread accessors, use simple instance getters instead
Refactored Nancy::Base#halt

0.2.0 (April 12, 2012)

Set PATH INFO to '/' when is blank
Fixed session method: Raise error when is used but Rack::Session isn't present
Added support for HEAD and OPTIONS HTTP verbs
Refactored Base.use to use a Rack::Builder internally
Added Base.map to redirect requests to Rack sub-apps

0.1.0 (April 4, 2012)

Created a new Github Page for the project
Added env accessor, this add support for Shield
Added support for templates caching using Tilt::Cache
Moved render method from Nancy::Base to Nancy::Render module
Refactored Nancy::Base to evaluate code blocks at instance level
Fixed passing of render options to Tilt (thanks to lporras)

0.0.1 (March 20, 2012)

Initial Release

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Added some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request