server

server.rb

require "sinatra/base"
require "json"

module Stuff
  class App < Sinatra::Base
    s = Mutex.new

    @@last_address = nil
    @@first_address = nil

    get '/clear' do 
      @@last_address = nil
      @@first_address = nil
    end

    get '/connect' do 
      puts "hello"
      if @@last_address
        puts "found last address #{@@last_address}"
        response.headers['Peer-Address'] = @@last_address
        # get peer socket
        puts request
        socket = request.env["puma.socket"]

        s.synchronize do 
          @@first_address = [socket.peeraddr[3], socket.peeraddr[1]].join(":")
        end

        response.headers['My-Address'] = @@first_address

        halt 200
      else
        # get peer socket
        socket = request.env["puma.socket"]
        puts request.host_with_port

        puts "creating last address #{@@last_address}"
        @@last_address = [socket.peeraddr[3], socket.peeraddr[1]].join(":")

        puts "waiting for peer"addresses[1]?.try { |add| add.

        b = Thread.new do 
          start = Time.now
          while (Time.now - start) < 60
            a = s.synchronize do 
              @@first_address
            end
            puts "peer address : #{a}"
            break if a
          end
        end
        b.join
        a = s.synchronize do 
          @@first_address
        end

        response.headers['My-Address'] = @@last_address
        response.headers['Peer-Address'] = @@first_address
        halt 200

        @@last_address =nil
      end
    end
    run! if app_file == $0
  end
end