How to send data from server to client using python?

Question

im new for python and im looking for a way to send data from server to client. I have a server monitoring program running on a server and you want to send a notification via python server to a python client

this is server code

from twisted.internet.protocol import Protocol, Factory from twisted.internet import reactor import time class Server(Protocol): def connectionMade(self): self.transport.write("data to client") factory = Factory() factory.protocol = Server reactor.listenTCP(8789, factory) reactor.run() 

Client code

 from twisted.internet.protocol import Protocol, ClientFactory from sys import stdout from twisted.internet import reactor class printData(Protocol): def dataReceived(self, data): stdout.write(data) class ClientFactory(ClientFactory): def startedConnecting(self, connector): print 'connecting' def buildProtocol(self, addr): print 'Connected.' return printData() def clientConnectionLost(self, connector, reason): print reason def clientConnectionFailed(self, connector, reason): print reason if __name__ == '__main__': reactor.connectTCP('localhost', 8789, ClientFactory()) reactor.run() 

so far I have found that if the client sends a message, the server responds to this message, but is there a way to send data only when the data is available to the client, without waiting for the clients to respond?

Answer 1

This server does not send responses to client messages. It sends a message when a client connects. If this is not what you want, try calling transport.write in another event handler.

If this is confusing, try thinking about determining when you want the server to send data to the client.

Do you want him to send data every five minutes?

Do you want it to send data when the child process of the server ends?

Do you want to send it when the administrator clicks a button on the server?

After you figure out which event should trigger the sending of data, you only need to put the transport.write call into the method or function that processes this event.

Answer 2

You can do this with AMP, which is a protocol in Twisted.