Consuming a REST API with Typhoeus

app.rb

require 'pwclient'


client = PetWorldClient.new

pets = client.api_call("/pets")
puts "There are #{pets.length} pets"

owner = client.api_call("/owners")[0]

puts "First Owner is #{owner['name']} (id=#{owner['id']})"

duke = client.api_call("/owner/#{owner['id']}/pet",:post, {
                         name: "Duke", breed: "Bloodhound"
})

if duke
  puts "Added #{duke['name']} (id=#{duke['id']}) to #{owner['name']}'s pets"
end


dukes = client.api_call("/pets/search",:post, { q: "Duke"})

puts "Found #{duke['name']} (id=#{duke['id']}) by searching" unless dukes.empty?



delete_duke = client.api_call("/pet/#{duke['id']}",:delete)

puts "Deleted Duke" unless dukes.empty?

pwclient.rb

require 'typhoeus'
require 'rack/utils'
require 'json'
require 'debugger'

PETWORLD_API_URL_ROOT = 'http://stujopet.herokuapp.com/api/v1'

class PetWorldClientException < StandardError
end

class PetWorldClient

  attr_reader :last_response, :last_request

  # https://github.com/typhoeus/typhoeus
  # Typhoeus.get("www.example.com")
  # Typhoeus.head("www.example.com")
  # Typhoeus.put("www.example.com/posts/1", body: "whoo, a body")
  # Typhoeus.post("www.example.com/posts", body: { title: "test post", content: "this is my test"})
  # Typhoeus.delete("www.example.com/posts/1")

  def initialize
    #Get an API TOKEN
    body = Typhoeus.get(PETWORLD_API_URL_ROOT + "/token").body
    @token = JSON.parse(body)['token']
    raise PetWorldClientException.new("Unable to get API Token") if @token.nil?
    puts "Obtained API Token '#{@token}'"
  end

  def api_call(path, method = :get, params = {}, body = "")
    @last_request = Typhoeus::Request.new(
      PETWORLD_API_URL_ROOT + path,
      method: method,
      body: body,
      params: params,
      headers: { X_PETWORLD_REST_API_KEY: @token }
    )
    @last_response = @last_request.run
    puts "Status Code #{@last_response.code} (#{Rack::Utils::HTTP_STATUS_CODES[@last_response.code]}) from [#{method.upcase}] to #{path}"

    payload = JSON.parse(@last_response.body) unless @last_response.code == 204

    if @last_response.code > 399
      puts "ERROR:" + payload['message']
      puts "ERROR:" + payload['errors'].to_s
      nil
    else
      payload
    end
  end
end

puts <<-USAGE
Usage Notes:
------------
client = PetWorldClient.new
pets = client.api_call("/pets")
puts "There are \#{pets.length} pets"
USAGE

Rakefile

desc "launch the console"

task "console" do
  exec 'irb -r ./pwclient.rb'
end