Example usage of rstatus' oauth provider capabilities

config.ru

require "./example"

run Sinatra::Application

example.rb

require 'bundler/setup'
require 'sinatra'
require 'oauth2'
require 'net/http'
require 'net/https'
require 'uri'

# This example heavily borrows from the Railscast on Doorkeeper, from the
# parts about testing your doorkeeper install.
# http://railscasts.com/episodes/353-oauth-with-doorkeeper?view=asciicast

# First: go to https://rstatus-staging.herokuapp.com/oauth/applications
# and create a new application.

# Enter a name for your app and a callback URL; when running this sinatra
# app locally it will be http://localhost:9292/callback

# We can actually change it per request though, this is the one we'll
# be using:
callback = "http://localhost:9292/callback"

# Fill in the following variables with the values given to you on the next
# screen:
app_id   = "ENTER YOUR APP ID TOKEN HERE"
secret   = "ENTER YOUR SECRET TOKEN HERE"

# If you want to run this against a different domain running the rstat.us
# code, change the value here:

base_url = "https://rstatus-staging.herokuapp.com/"

client = OAuth2::Client.new(
           app_id,
           secret,
           site: base_url
         )
rstatus_auth_url = client.auth_code.authorize_url(
                     redirect_uri: callback,
                     scope: "read write"
                   )

enable :sessions

get '/' do
  if session[:auth_token]
    "<form action='/update' method='post'><textarea name='status'></textarea><input type='submit' /></form>"
  else
    "<a href='#{rstatus_auth_url}'>Log in with rstat.us</a>"
  end
end

get '/callback' do
  access = client.auth_code.get_token(params[:code], redirect_uri: callback)
  session[:auth_token] = access.token
  redirect '/'
end

post "/update" do
  if session[:auth_token]
    uri = URI.parse("#{base_url}api/statuses/update.json")

    http = Net::HTTP.new(uri.host, uri.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE

    request = Net::HTTP::Post.new(uri.path)
    request.set_form_data({
      :status => params[:status],
      :access_token => session[:auth_token]
    })
    response = http.request(request)
  end
  redirect '/'
end

Gemfile

source 'http://rubygems.org'

gem "sinatra", "~> 1.3.2"
gem "oauth2", "~> 0.5.0"

Gemfile.lock

GEM
  remote: http://rubygems.org/
  specs:
    faraday (0.8.4)
      multipart-post (~> 1.1)
    multi_json (1.3.6)
    multipart-post (1.1.5)
    oauth2 (0.5.2)
      faraday (~> 0.7)
      multi_json (~> 1.0)
    rack (1.4.1)
    rack-protection (1.2.0)
      rack
    sinatra (1.3.3)
      rack (~> 1.3, >= 1.3.6)
      rack-protection (~> 1.2)
      tilt (~> 1.3, >= 1.3.3)
    tilt (1.3.3)

PLATFORMS
  ruby

DEPENDENCIES
  oauth2 (~> 0.5.0)
  sinatra (~> 1.3.2)