![]() We pass the list of cars so it can be accessed using the factory in the protocol instance which we are going to see next. ![]() This is our server factory class creating protocol instances each time a connection is made. Port = reactor.listenTCP(self.port or 0, self.factory, Self.interface = ''Ĭall reactor's listen to listen for client's connections Logging.basicConfig(filename='server.log', level=logging.DEBUG) # init logging facility: log to client.log The class has a method named “listen” to start listening for new TCP connections on a specific host and port. This factory produces a protocol instance for each connection. The constructor takes care of the following: The server listens for connection and write the cars data when a connection is initiated.įirst, we have our server application class. Events include: connection made, data received, connection lost… Server When this loop detects an event, it uses callbacks to report those events. It uses an event loop called the reactor. Twisted is an asynchronous networking framework. We will use the Deferred feature to handle completion and failures callbacks. Second element is the client retrieving the list of cars from the servers. We are in charge of building a client/server software solution to retrieve the list of cars from different monitoring locations.įirst element is a server used to monitor the cars and listen for clients connections to reply with the list of cars. Some researchers invented a system capable of monitoring cars and detecting the brand and color of a car. ![]() The client and server source code can be retrieved using Git: We are going to focus on the client/server communication. This article describes how to use Twisted to build a client/server cars monitoring system.
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