"""A process that reads from stdin and out using Twisted."""

### Twisted Preamble
# This makes sure that users don't have to set up their environment
# specially in order to run these programs from bin/.
import sys, os
pos = os.path.abspath(sys.argv[0]).find(os.sep+'Twisted')
if pos != -1:
sys.path.insert(0, os.path.abspath(sys.argv[0])[:pos+8])
sys.path.insert(0, os.curdir)
### end of preamble


from twisted.python import log
from zope.interface import implements
from twisted.internet import interfaces

log.startLogging(sys.stderr)

from twisted.internet import protocol, reactor, stdio


class Echo(protocol.Protocol):
implements(interfaces.IHalfCloseableProtocol)

def connectionMade(self):
print "connection made"

def dataReceived(self, data):
self.transport.write(data)

def readConnectionLost(self):
print "readConnectionLost"
self.transport.loseConnection()
def writeConnectionLost(self):
print "writeConnectionLost"

def connectionLost(self, reason):
print "connectionLost", reason
reactor.stop()

stdio.StandardIO(Echo())
reactor.run()