Using Faraday and making CouchDB return JSON. Simple middleware

faraday_json_middleware.rb

# this simple plumbing makes sure that the return data is in the form of a hash.

require 'faraday'

class Main
  attr_reader :conn
  def initialize
    @conn = Faraday.new "http://127.0.0.1:5984/somedb" do |faraday|
      faraday.adapter :em_http
      faraday.builder.insert(0, JSONMiddleware)
    end
  end

  def db_stats
    conn.get.body
  end
end

class JSONMiddleware
  def initialize(app)
    @app = app
  end

  def call(env)
    # request non-sense goes here
    @app.call(env).on_complete do |env|
      env[:body] = env[:body].strip.empty? JSON.parse "{}" : JSON.parse env[:body]
      env[:response_headers]["Content-Type"] = 'application/json'
      env[:response_headers]["Content-Length"] = env[:body].length.to_s
    end
  end
end