Sinatra(WEBrick)でsslサーバをたてる

server.rb

# -*- coding: utf-8 -*-

require 'sinatra/base'
require 'pp'
require 'webrick'
require 'webrick/https'
require 'openssl'

CRT_FILE_NAME = 'server.crt'
RSA_FILE_NAME = 'server.key'

#初期起動時に鍵を自動生成する
unless File.exists?(CRT_FILE_NAME) || File.exists?(RSA_FILE_NAME)
  crt, rsa = WEBrick::Utils::create_self_signed_cert(1024, [["CN", WEBrick::Utils::getservername]], 'Generated by Ruby/OpenSSL')
  File.open(CRT_FILE_NAME, "w") {|f| f.write crt} 
  File.open(RSA_FILE_NAME, "w") {|f| f.write rsa}
end

webrick_options = {
       :Port               => 443,
       :Logger             => WEBrick::Log::new($stderr, WEBrick::Log::DEBUG),
       :SSLEnable          => true,
       :SSLVerifyClient    => OpenSSL::SSL::VERIFY_NONE,
       :SSLCertificate     => OpenSSL::X509::Certificate.new(File.open(CRT_FILE_NAME).read),
       :SSLPrivateKey      => OpenSSL::PKey::RSA.new(File.open(RSA_FILE_NAME).read)
}

class Apps < Sinatra::Base
    set :logging, false
    get '/favicon.ico' do
        'Nothing'
    end
end

#WEBrickを自力で起動させる場合、Ctrl+Cで止めるには以下のトラップコードが必要
Rack::Handler::WEBrick.run Apps, webrick_options do |server|
  shutdown_proc = ->( sig ){ server.shutdown() }
  [ :INT, :TERM ].each{ |e| Signal.trap( e, &shutdown_proc ) }  
end

In recent versions of Rack, this returns the error:
uninitialized constant Rack::Handler (NameError)

Thans for the comment.
It's pretty old code, so it might not work. I'll try to fix it now.