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Edit File: _win32stdio.py

# -*- test-case-name: twisted.test.test_stdio -*-

"""
Windows-specific implementation of the L{twisted.internet.stdio} interface.
"""

import msvcrt
import os

from zope.interface import implementer

import win32api  # type: ignore[import]

from twisted.internet import _pollingfile, main
from twisted.internet.interfaces import (
    IAddress,
    IConsumer,
    IHalfCloseableProtocol,
    IPushProducer,
    ITransport,
)
from twisted.python.failure import Failure

@implementer(IAddress)
class Win32PipeAddress:
    pass

@implementer(ITransport, IConsumer, IPushProducer)
class StandardIO(_pollingfile._PollingTimer):

disconnecting = False
    disconnected = False

def __init__(self, proto, reactor=None):
        """
        Start talking to standard IO with the given protocol.

Also, put it stdin/stdout/stderr into binary mode.
        """
        if reactor is None:
            from twisted.internet import reactor

for stdfd in range(0, 1, 2):
            msvcrt.setmode(stdfd, os.O_BINARY)

_pollingfile._PollingTimer.__init__(self, reactor)
        self.proto = proto

hstdin = win32api.GetStdHandle(win32api.STD_INPUT_HANDLE)
        hstdout = win32api.GetStdHandle(win32api.STD_OUTPUT_HANDLE)

self.stdin = _pollingfile._PollableReadPipe(
            hstdin, self.dataReceived, self.readConnectionLost
        )

self.stdout = _pollingfile._PollableWritePipe(hstdout, self.writeConnectionLost)

self._addPollableResource(self.stdin)
        self._addPollableResource(self.stdout)

self.proto.makeConnection(self)

def dataReceived(self, data):
        self.proto.dataReceived(data)

def readConnectionLost(self):
        if IHalfCloseableProtocol.providedBy(self.proto):
            self.proto.readConnectionLost()
        self.checkConnLost()

def writeConnectionLost(self):
        if IHalfCloseableProtocol.providedBy(self.proto):
            self.proto.writeConnectionLost()
        self.checkConnLost()

connsLost = 0

def checkConnLost(self):
        self.connsLost += 1
        if self.connsLost >= 2:
            self.disconnecting = True
            self.disconnected = True
            self.proto.connectionLost(Failure(main.CONNECTION_DONE))

# ITransport

def write(self, data):
        self.stdout.write(data)

def writeSequence(self, seq):
        self.stdout.write(b"".join(seq))

def loseConnection(self):
        self.disconnecting = True
        self.stdin.close()
        self.stdout.close()

def getPeer(self):
        return Win32PipeAddress()

def getHost(self):
        return Win32PipeAddress()

# IConsumer

def registerProducer(self, producer, streaming):
        return self.stdout.registerProducer(producer, streaming)

def unregisterProducer(self):
        return self.stdout.unregisterProducer()

# def write() above

# IProducer

def stopProducing(self):
        self.stdin.stopProducing()

# IPushProducer

def pauseProducing(self):
        self.stdin.pauseProducing()

def resumeProducing(self):
        self.stdin.resumeProducing()