old_contents: from twisted.internet import reactor, protocol
  
  from hubbot.moduleinterface import ModuleInterface
  
  
  class Echo(protocol.Protocol):
      """This is just about the simplest possible protocol"""
  
      def dataReceived(self, data):
          """As soon as any data is received, write it back."""
          self.transport.write(data)
  
  
  class Healthcheck(ModuleInterface):
      port = 9999
  
      def __init__(self, bot):
          self.healthcheck_server = protocol.ServerFactory()
          self.healthcheck_server.protocol = Echo
  
          super().__init__(bot)
  
      def on_load(self):
          reactor.listenTCP(self.port, self.healthcheck_server)
  
      def on_unload(self):
          reactor.stopListening(self.port)
  
      def help(self, message):
          return f"Hosts an HTTP healthcheck server on port {self.port}."
  
new_contents: from twisted.protocols import basic
  from twisted.internet import protocol, reactor
  
  from hubbot.moduleinterface import ModuleInterface
  
  
  class HealthcheckProtocol(basic.LineReceiver):
      def lineReceived(self, line):
          response_body = "All is well. Ish."
          self.sendLine("HTTP/1.0 200 OK".encode("UTF-8"))
          self.sendLine("Content-Type: text/plain".encode("UTF-8"))
          self.sendLine(f"Content-Length: {len(response_body)}\n".encode("UTF-8"))
          self.transport.write(response_body)
          self.transport.loseConnection()
  
  
  class Healthcheck(ModuleInterface):
      port = 9999
  
      def __init__(self, bot):
          self.healthcheck_server = protocol.ServerFactory()
          self.healthcheck_server.protocol = HealthcheckProtocol
  
          super().__init__(bot)
  
      def on_load(self):
          reactor.listenTCP(self.port, self.healthcheck_server)
  
      def on_unload(self):
          reactor.stopListening(self.port)
  
      def help(self, message):
          return f"Hosts an HTTP healthcheck server on port {self.port}."
  
subject: Write a slightly less dumb protocol?