New thread on each request

handler.rb

# frozen_string_literal: true
require 'redis'

class Handler
  DB = Redis.new
  
  def initialize(client, request, db)
    @client = client
    @request = request
  end

  def handle
    method, full_path = @request.split(' ')
    path = full_path.split('?').first
    raise unless method == 'GET' && path =~ %r{^/[0-9]+$}
    id = path[1..-1]
    data = DB.get(id)
    raise unless data
    print 200, data
  rescue
    print 404, 'Not Found'
  ensure
    @client.close
  end

  def print(code, text)
    @client.print "HTTP/1.1 #{code}\r\n"
    @client.print "Content-Type: text/plain\r\n"
    @client.print "Content-Length: #{text.length}\r\n"
    @client.print "Connection: close"
    @client.print "\r\n"
    @client.print text
  end
end

server.rb

# frozen_string_literal: true
require 'socket'
require './handler'

port = ENV['PORT'] || 10_000
server = TCPServer.new port

loop do
  Thread.fork(server.accept) do |client|
    request = client.gets
    Handler.new(client, request).handle
  end
end