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import sys
from twisted.internet.protocol import FileWrapper
from twisted.protocols.basic import LineOnlyReceiver
class Echoer(LineOnlyReceiver):
delimiter = "\n"
def lineReceived(self, line):
self.sendLine(line)
def main():
echo = Echoer()
echo.makeConnection(FileWrapper(sys.stdout))
while True:
byte = sys.stdin.read(1)
if not byte:
break
echo.dataReceived(byte)
def test():
from StringIO import StringIO
output = StringIO()
echo = Echoer()
echo.makeConnection(FileWrapper(output))
echo.lineReceived("foo")
echo.lineReceived("bar")
assert output.getvalue() == "foo\nbar\n"
test()
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