basic proxy and consumer done

.drone.yml

@@ -50,7 +50,7 @@ steps:
       - export BM_COMPONENT=portal
       - export BUILD_TARGET=wizewerx/bettermail_${BM_COMPONENT}:${DRONE_COMMIT_BRANCH}
       - docker pull $BUILD_TARGET
-      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./consumer/docker/Dockerfile -t $BUILD_TARGET .
+      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./${BM_COMPONENT}/docker/Dockerfile -t $BUILD_TARGET .
       - docker push $BUILD_TARGET
   - name: proxy
     image: wizewerx/wizewerx-docker-compose
@@ -65,7 +65,7 @@ steps:
       - export BM_COMPONENT=proxy
       - export BUILD_TARGET=wizewerx/bettermail_${BM_COMPONENT}:${DRONE_COMMIT_BRANCH}
       - docker pull $BUILD_TARGET
-      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./consumer/docker/Dockerfile -t $BUILD_TARGET .
+      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./${BM_COMPONENT}/docker/Dockerfile -t $BUILD_TARGET .
       - docker push $BUILD_TARGET
   - name: notifications
     image: wizewerx/wizewerx-docker-compose
@@ -80,7 +80,7 @@ steps:
       - export BM_COMPONENT=notifications
       - export BUILD_TARGET=wizewerx/bettermail_${BM_COMPONENT}:${DRONE_COMMIT_BRANCH}
       - docker pull $BUILD_TARGET
-      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./consumer/docker/Dockerfile -t $BUILD_TARGET .
+      - docker build --cache-from $BUILD_TARGET --build-arg GEM_CACHE=$BUILD_TARGET -f ./${BM_COMPONENT}/docker/Dockerfile -t $BUILD_TARGET .
       - docker push $BUILD_TARGET
   - name: notify_end
     image: plugins/slack

consumer/.ruby-gemset

@@ -0,0 +1 @@
+bettermail_consumer

consumer/.ruby-version

@@ -0,0 +1 @@
+ruby-2.7.2

consumer/Gemfile

@@ -1,15 +1,6 @@
 source 'https://rubygems.org'
-ruby '2.6.5'
-gem 'dotenv-rails'
-
-# Reduces boot times through caching; required in config/boot.rb
-gem 'bootsnap', '>= 1.4.2', require: false
-
-group :development do
-  gem 'web-console', '>= 3.3.0'
-  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-  gem 'spring'
-  gem 'spring-watcher-listen', '~> 2.0.0'
-end
-
+ruby '2.7.2'
+gem 'dotenv'
 gem 'bunny'
+gem 'mail'
+gem 'pg'

consumer/Gemfile.lock

@@ -0,0 +1,32 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    amq-protocol (2.3.2)
+    bunny (2.19.0)
+      amq-protocol (~> 2.3, >= 2.3.1)
+      sorted_set (~> 1, >= 1.0.2)
+    dotenv (2.8.1)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.1.2)
+    pg (1.4.4)
+    rbtree (0.4.5)
+    set (1.0.3)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bunny
+  dotenv
+  mail
+  pg
+
+RUBY VERSION
+   ruby 2.7.2p137
+
+BUNDLED WITH
+   2.1.4

consumer/bettermail_consumer.rb

@@ -0,0 +1,88 @@
+# frozen_string_literal: true
+
+require 'dotenv/load'
+require 'pg'
+require 'mail'
+require 'bunny'
+
+# Server class
+class BettermailConsumer
+  def initialize
+    @pg = PG::Connection.new(ENV['DATABASE_URL'])
+  end
+
+  def start
+    begin
+      puts ' [*] Waiting for messages. To exit press CTRL+C'
+      mail_queue = bunny_channel.queue(ENV['RABBIT_MAIL_QUEUE'])
+      mail_queue.subscribe(block: true) do |_delivery_info, _properties, body|
+        mail = Mail.read_from_string(body)
+        puts mail
+      end
+      sns_queue = bunny_channel.queue(ENV['RABBIT_SNS_QUEUE'])
+      sns_queue.subscribe(block: true) do |_delivery_info, _properties, body|
+        puts " [x] Received #{_delivery_info}"
+      end
+    rescue Interrupt => _
+      stop
+    end
+
+  end
+
+  def stop
+    @bunny_conn&.close
+    @pg&.close
+  end
+
+  def bunny_channel
+    if @bunny_channel.nil?
+      @bunny_conn = Bunny.new
+      @bunny_conn.start
+      @bunny_channel = @bunny_conn.create_channel
+    end
+    @bunny_channel
+  end
+end
+
+service_name='BetterMail::Consumer'
+# Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
+# and accepting a maximum of 4 simultaneous connections per default
+service = BettermailConsumer.new
+
+# save flag for Ctrl-C pressed
+flag_status_ctrl_c_pressed = false
+
+# try to gracefully shutdown on Ctrl-C
+trap('INT') do
+  # print an empty line right after ^C
+  puts
+  # notify flag about Ctrl-C was pressed
+  flag_status_ctrl_c_pressed = true
+  # signal exit to app
+  exit 0
+end
+
+# Output for debug
+puts("Starting #{service_name}")
+
+# setup exit code
+at_exit do
+  # check to shutdown connection
+  if service
+    # Output for debug
+    puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
+    # info about shutdown
+    puts("Shutdown #{service_name}...")
+    # stop all threads and connections gracefully
+    service.stop
+  end
+
+  # Output for debug
+  puts "#{service_name} stopped!"
+end
+
+# Start the server
+service.start
+
+# Run on server forever
+service.join

consumer/start.sh

@@ -0,0 +1 @@
+ruby ./bettermail_consumer.rb

proxy/.ruby-gemset

@@ -0,0 +1 @@
+bettermail_proxy

proxy/.ruby-version

@@ -0,0 +1 @@
+ruby-2.7.2

proxy/Gemfile

@@ -1,17 +1,7 @@
 source 'https://rubygems.org'
-ruby '2.6.5'
-gem 'dotenv-rails'
-
-# Reduces boot times through caching; required in config/boot.rb
-gem 'bootsnap', '>= 1.4.2', require: false
-
-group :development do
-  gem 'web-console', '>= 3.3.0'
-  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-  gem 'spring'
-  gem 'spring-watcher-listen', '~> 2.0.0'
-end
-
+ruby '2.7.2'
+gem 'dotenv'
 gem 'bunny'
 gem 'midi-smtp-server', '~> 3.0.1'
-gem 'openssl', '~> 2.1.0'
+gem 'mail'
+gem 'openssl'

proxy/Gemfile.lock

@@ -0,0 +1,34 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    amq-protocol (2.3.2)
+    bunny (2.19.0)
+      amq-protocol (~> 2.3, >= 2.3.1)
+      sorted_set (~> 1, >= 1.0.2)
+    dotenv (2.8.1)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
+    midi-smtp-server (3.0.3)
+    mini_mime (1.1.2)
+    openssl (3.0.1)
+    rbtree (0.4.5)
+    set (1.0.3)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bunny
+  dotenv
+  mail
+  midi-smtp-server (~> 3.0.1)
+  openssl
+
+RUBY VERSION
+   ruby 2.7.2p137
+
+BUNDLED WITH
+   2.1.4

proxy/bettermail_proxy.rb

@@ -1,24 +1,87 @@
 # frozen_string_literal: true
 
+require 'dotenv/load'
 require 'midi-smtp-server'
+require 'mail'
+require 'bunny'
 
 # Server class
 class BettermailProxy < MidiSmtpServer::Smtpd
 
+  def stop(wait_seconds_before_close: nil, gracefully: nil)
+    super()
+    @bunny_conn&.close
+  end
+
+  def bunny
+    if @bunny.nil?
+      @bunny_conn = Bunny.new
+      @bunny_conn.start
+      ch = @bunny_conn.create_channel
+      ch.direct(ENV['RABBIT_CHANNEL'])
+      ch.queue(ENV['RABBIT_MAIL_QUEUE'])
+      @bunny = ch.default_exchange
+    end
+    @bunny
+  end
+
+  # update local welcome and helo response
+  def on_connect_event(ctx)
+    ctx[:server][:local_response] = 'Client connected'
+    ctx[:server][:helo_response] = 'Welcome to the BetterMail proxy - an SMTP drop in replacement'
+  end
+
+  def on_message_data_headers_event(ctx)
+    # check and append all headers
+    ctx[:message][:data] << "X-bettermail: Received by proxy at #{Time.now}" << ctx[:message][:crlf]
+  end
+
+  # check the authentication
+  # if any value returned, that will be used for ongoing processing
+  # otherwise the original value will be used for authorization_id
+  def on_auth_event(ctx, authorization_id, authentication_id, authentication)
+    # to proceed this test use commands ...
+    # auth plain
+    # > AGFkbWluaXN0cmF0b3IAcGFzc3dvcmQ=
+    # auth login
+    # > YWRtaW5pc3RyYXRvcg==
+    # > cGFzc3dvcmQ=
+    # if authorization_id == '' && authentication_id == 'administrator' && authentication == 'password'
+    #   # yes
+    #   return 'supervisor'
+    # end
+    # # otherwise exit with authentication exception
+    # raise MidiSmtpServer::Smtpd535Exception
+    logger.debug("Authenticated id: #{authentication_id} with authentication: #{authentication} from: #{ctx[:server][:remote_ip]}:#{ctx[:server][:remote_port]}")
+    authentication_id
+  end
+
+
   # get each message after DATA <message> .
   def on_message_data_event(ctx)
     # Just decode message once to make sure, that this message ist readable
-    mail = Mail.read_from_string(ctx[:message])
-
-    # Publish to rabbit
-    @bunny_exchange.publish(mail.to_s, :headers => { 'x-smtp' => mail.header.to_s }, :routing_key => "new_email")
+    mail = Mail.read_from_string(ctx[:message][:data])
+    logger.info('Message good. Sending to queue for processing')
+    bunny.publish(mail.to_s, :headers => { 'x-smtp' => mail.header.to_s }, :routing_key => ENV["RABBIT_MAIL_QUEUE"])
+    logger.info('Done')
   end
-
 end
 
 # Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
 # and accepting a maximum of 4 simultaneous connections per default
-server = MySmtpd.new
+service = BettermailProxy.new(
+  ports: ENV['PROXY_PORTS'],
+  hosts: ENV['PROXY_HOSTS'],
+  max_processings: 10,
+  auth_mode: :AUTH_REQUIRED,
+  tls_mode: :TLS_REQUIRED,
+  tls_cert_path: './ssl/cert.pem',
+  tls_key_path: './ssl/key.pem'
+)
+
+service_name='BetterMail::SMTPProxy'
+# Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
+# and accepting a maximum of 4 simultaneous connections per default
 
 # save flag for Ctrl-C pressed
 flag_status_ctrl_c_pressed = false
@@ -30,29 +93,30 @@ trap('INT') do
   # notify flag about Ctrl-C was pressed
   flag_status_ctrl_c_pressed = true
   # signal exit to app
-  exit 0
+  exit(0)
 end
 
 # Output for debug
-server.logger.info("Starting MySmtpd [#{MidiSmtpServer::VERSION::STRING}|#{MidiSmtpServer::VERSION::DATE}] (Basic usage) ...")
+puts("Starting #{service_name}")
 
 # setup exit code
 at_exit do
   # check to shutdown connection
-  if server
+  if service
     # Output for debug
-    server.logger.info('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
+    puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
     # info about shutdown
-    server.logger.info('Shutdown MySmtpd...')
+    puts("Shutdown #{service_name}...")
     # stop all threads and connections gracefully
-    server.stop
+    service.stop
   end
+
   # Output for debug
-  server.logger.info('MySmtpd down!')
+  puts "#{service_name} stopped!"
 end
 
 # Start the server
-server.start
+service.start
 
 # Run on server forever
-server.join
+service.join

proxy/ssl/cert.pem

@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFbTCCA1WgAwIBAgIUAf9HBsl8FOGp9rGyrroaRmBraFAwDQYJKoZIhvcNAQEL
+BQAwRTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
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+og==
+-----END CERTIFICATE-----

proxy/ssl/key.pem

@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQC2gTesDCOpLjHH
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+sBlA9g2jwjUHqPuhZeTnJ7xN994KpXK86YQ4v/hLMSMQ7wWdVcIW7w2BJLxvBA2Q
+LVLLfEsFJloCoigoMEVeiTeiZhBRj28Cb9txAQ45SFI0gvVvl2I+ZAP9M0k9Cdc/
+9vWblChgTPLkfpNsK00wiOG1Lji9KeRDhwm2ht1jHBhhk+dVaLyZPD7hFnog6cIV
+dJdrln0uZBTkWf55AOcyN/jHdXsdxQBEVA3I3E2UwsZxRdZT7DIhNggL4xQ6RtBE
+5ZADVjSHf21VhXCmSSGtL59GcaMYVA==
+-----END PRIVATE KEY-----

proxy/start.sh

@@ -0,0 +1 @@
+ruby ./bettermail_proxy.rb