How to enable SSL for a standalone Sinatra app?

Question

I want to write a quick server app in Sinatra. It has to be self-contained (i.e. not use apache/nginx/passenger) but also has to support SSL.

Is there an easy way to enable SSL support for Sinatra (using WEBRick for example)?

Answer 1

To do this with MRI ruby, use the following monkeypatch:

sinatra_ssl.rb:

require 'webrick/https'

module Sinatra
  class Application
    def self.run!
      certificate_content = File.open(ssl_certificate).read
      key_content = File.open(ssl_key).read

      server_options = {
        :Host => bind,
        :Port => port,
        :SSLEnable => true,
        :SSLCertificate => OpenSSL::X509::Certificate.new(certificate_content),
        :SSLPrivateKey => OpenSSL::PKey::RSA.new(key_content)
      }

      Rack::Handler::WEBrick.run self, server_options do |server|
        [:INT, :TERM].each { |sig| trap(sig) { server.stop } }
        server.threaded = settings.threaded if server.respond_to? :threaded=
        set :running, true
      end
    end
  end
end

Then, in your standalone application:

app.rb

require 'sinatra'
require 'sinatra_ssl'

set :port, 8443
set :ssl_certificate, "server.crt"
set :ssl_key, "server.key"

get "/" do
  "Hello world!"
end