Viewing file:  stdio_test_producer.py (1.45 KB) -rw-r--r--
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# -*- test-case-name: twisted.test.test_stdio.StandardInputOutputTests.test_producer -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Main program for the child process run by
L{twisted.test.test_stdio.StandardInputOutputTests.test_producer} to test
that process transports implement IProducer properly.
"""
import sys
from twisted.internet import protocol, stdio
from twisted.python import log, reflect
class ProducerChild(protocol.Protocol):
_paused = False
buf = b""
def connectionLost(self, reason):
log.msg("*****OVER*****")
reactor.callLater(1, reactor.stop)
def dataReceived(self, data):
self.buf += data
if self._paused:
log.startLogging(sys.stderr)
log.msg("dataReceived while transport paused!")
self.transport.loseConnection()
else:
self.transport.write(data)
if self.buf.endswith(b"\n0\n"):
self.transport.loseConnection()
else:
self.pause()
def pause(self):
self._paused = True
self.transport.pauseProducing()
reactor.callLater(0.01, self.unpause)
def unpause(self):
self._paused = False
self.transport.resumeProducing()
if __name__ == "__main__":
reflect.namedAny(sys.argv[1]).install()
from twisted.internet import reactor
stdio.StandardIO(ProducerChild())
reactor.run() # type: ignore[attr-defined]
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