I have this twisted client, which connects with a twisted server having an index. I ran this client from command-line. It worked fine. Now I modified it to run in loop (see main()) so that I can keep querying. But the client runs only once. Next time it simply says connection lost \n Connection lost - goodbye!.
What am i doing wrong? In the loop I am reconnecting to the server, it that wrong?
from twisted.internet import reactor
from twisted.internet import protocol
from settings import AS_SERVER_HOST, AS_SERVER_PORT
# a client protocol
class Spell_client(protocol.Protocol):
"""Once connected, send a message, then print the result."""
def connectionMade(self):
self.transport.write(self.factory.query)
def dataReceived(self, data):
"As soon as any data is received, write it back."
if data == '!':
self.factory.results = ''
else:
self.factory.results = data
self.transport.loseConnection()
def connectionLost(self, reason):
print "\tconnection lost"
class Spell_Factory(protocol.ClientFactory):
protocol = Spell_client
def __init__(self, query):
self.query = query
self.results = ''
def clientConnectionFailed(self, connector, reason):
print "\tConnection failed - goodbye!"
reactor.stop()
def clientConnectionLost(self, connector, reason):
print "\tConnection lost - goodbye!"
reactor.stop()
# this connects the protocol to a server runing on port 8090
def main():
print 'Connecting to %s:%d' % (AS_SERVER_HOST, AS_SERVER_PORT)
while True:
print
query = raw_input("Query:")
if query == '': return
f = Spell_Factory(query)
reactor.connectTCP(AS_SERVER_HOST, AS_SERVER_PORT, f)
reactor.run()
print f.results
return
if __name__ == '__main__':
main()
You don’t quite understand how the Twisted reactor works.
reactor.run()is starting up the reactor’s event-loop — it’s a blocking call that loops “forever”.See http://twistedmatrix.com/documents/10.2.0/core/howto/reactor-basics.html for various reactor-related topics.