Nancy

Sinatra's little daughter

Description

Minimal Ruby microframework for web development inspired in Sinatra and Cuba

Requires Ruby 2.7 or greater.

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"
require "nancy/render"

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

  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 "/files/:root/*path" do
    "From #{params['root']}, download #{params['path']}"
  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

  before("/protected") do
    halt 401, "unauthorized" unless session[:authenticated]
  end

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

  after(".{+extension}") do |params|
    case params['extension']
    when 'json'
      response['Content-Type'] = 'application/json'
    else
      response['Content-Type'] = 'text/html'
    end
  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

0.6.0 (unreleased)

• Now requires ruby 2.7; version contains fixes for modern ruby and rack

0.5.0 (unreleased)

• Switches the routing backend to sinatra/mustermann, supporting wildcard routes, optional parameters, etc.

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'
• Nancy::Render is not loaded automatically, "nancy/render" needs to be required
• 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

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

Copyright

Copyright (c) 2012-2014 Guillermo Iguaran. See LICENSE for further details.