Python iostream.PipeIOStream方法代碼示例

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def test_pipe_iostream(self):
        r, w = os.pipe()

        rs = PipeIOStream(r, io_loop=self.io_loop)
        ws = PipeIOStream(w, io_loop=self.io_loop)

        ws.write(b"hel")
        ws.write(b"lo world")

        rs.read_until(b' ', callback=self.stop)
        data = self.wait()
        self.assertEqual(data, b"hello ")

        rs.read_bytes(3, self.stop)
        data = self.wait()
        self.assertEqual(data, b"wor")

        ws.close()

        rs.read_until_close(self.stop)
        data = self.wait()
        self.assertEqual(data, b"ld")

        rs.close() 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def test_pipe_iostream_big_write(self):
        r, w = os.pipe()

        rs = PipeIOStream(r, io_loop=self.io_loop)
        ws = PipeIOStream(w, io_loop=self.io_loop)

        NUM_BYTES = 1048576

        # Write 1MB of data, which should fill the buffer
        ws.write(b"1" * NUM_BYTES)

        rs.read_bytes(NUM_BYTES, self.stop)
        data = self.wait()
        self.assertEqual(data, b"1" * NUM_BYTES)

        ws.close()
        rs.close() 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def __init__(self, *args, **kwargs):
        self.io_loop = kwargs.pop('io_loop', None) or ioloop.IOLoop.current()
        # All FDs we create should be closed on error; those in to_close
        # should be closed in the parent process on success.
        pipe_fds = []
        to_close = []
        if kwargs.get('stdin') is Subprocess.STREAM:
            in_r, in_w = _pipe_cloexec()
            kwargs['stdin'] = in_r
            pipe_fds.extend((in_r, in_w))
            to_close.append(in_r)
            self.stdin = PipeIOStream(in_w, io_loop=self.io_loop)
        if kwargs.get('stdout') is Subprocess.STREAM:
            out_r, out_w = _pipe_cloexec()
            kwargs['stdout'] = out_w
            pipe_fds.extend((out_r, out_w))
            to_close.append(out_w)
            self.stdout = PipeIOStream(out_r, io_loop=self.io_loop)
        if kwargs.get('stderr') is Subprocess.STREAM:
            err_r, err_w = _pipe_cloexec()
            kwargs['stderr'] = err_w
            pipe_fds.extend((err_r, err_w))
            to_close.append(err_w)
            self.stderr = PipeIOStream(err_r, io_loop=self.io_loop)
        try:
            self.proc = subprocess.Popen(*args, **kwargs)
        except:
            for fd in pipe_fds:
                os.close(fd)
            raise
        for fd in to_close:
            os.close(fd)
        for attr in ['stdin', 'stdout', 'stderr', 'pid']:
            if not hasattr(self, attr):  # don't clobber streams set above
                setattr(self, attr, getattr(self.proc, attr))
        self._exit_callback = None
        self.returncode = None 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def __init__(self, *args: Any, **kwargs: Any) -> None:
        self.io_loop = ioloop.IOLoop.current()
        # All FDs we create should be closed on error; those in to_close
        # should be closed in the parent process on success.
        pipe_fds = []  # type: List[int]
        to_close = []  # type: List[int]
        if kwargs.get("stdin") is Subprocess.STREAM:
            in_r, in_w = _pipe_cloexec()
            kwargs["stdin"] = in_r
            pipe_fds.extend((in_r, in_w))
            to_close.append(in_r)
            self.stdin = PipeIOStream(in_w)
        if kwargs.get("stdout") is Subprocess.STREAM:
            out_r, out_w = _pipe_cloexec()
            kwargs["stdout"] = out_w
            pipe_fds.extend((out_r, out_w))
            to_close.append(out_w)
            self.stdout = PipeIOStream(out_r)
        if kwargs.get("stderr") is Subprocess.STREAM:
            err_r, err_w = _pipe_cloexec()
            kwargs["stderr"] = err_w
            pipe_fds.extend((err_r, err_w))
            to_close.append(err_w)
            self.stderr = PipeIOStream(err_r)
        try:
            self.proc = subprocess.Popen(*args, **kwargs)
        except:
            for fd in pipe_fds:
                os.close(fd)
            raise
        for fd in to_close:
            os.close(fd)
        self.pid = self.proc.pid
        for attr in ["stdin", "stdout", "stderr"]:
            if not hasattr(self, attr):  # don't clobber streams set above
                setattr(self, attr, getattr(self.proc, attr))
        self._exit_callback = None  # type: Optional[Callable[[int], None]]
        self.returncode = None  # type: Optional[int] 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def __init__(self, *args, **kwargs):
        self.io_loop = ioloop.IOLoop.current()
        # All FDs we create should be closed on error; those in to_close
        # should be closed in the parent process on success.
        pipe_fds = []
        to_close = []
        if kwargs.get('stdin') is Subprocess.STREAM:
            in_r, in_w = _pipe_cloexec()
            kwargs['stdin'] = in_r
            pipe_fds.extend((in_r, in_w))
            to_close.append(in_r)
            self.stdin = PipeIOStream(in_w)
        if kwargs.get('stdout') is Subprocess.STREAM:
            out_r, out_w = _pipe_cloexec()
            kwargs['stdout'] = out_w
            pipe_fds.extend((out_r, out_w))
            to_close.append(out_w)
            self.stdout = PipeIOStream(out_r)
        if kwargs.get('stderr') is Subprocess.STREAM:
            err_r, err_w = _pipe_cloexec()
            kwargs['stderr'] = err_w
            pipe_fds.extend((err_r, err_w))
            to_close.append(err_w)
            self.stderr = PipeIOStream(err_r)
        try:
            self.proc = subprocess.Popen(*args, **kwargs)
        except:
            for fd in pipe_fds:
                os.close(fd)
            raise
        for fd in to_close:
            os.close(fd)
        for attr in ['stdin', 'stdout', 'stderr', 'pid']:
            if not hasattr(self, attr):  # don't clobber streams set above
                setattr(self, attr, getattr(self.proc, attr))
        self._exit_callback = None
        self.returncode = None 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def make_iostream_pair(self, **kwargs):
        r, w = os.pipe()

        return PipeIOStream(r, **kwargs), PipeIOStream(w, **kwargs) 

# 需要導入模塊: from tornado import iostream [as 別名]
# 或者: from tornado.iostream import PipeIOStream [as 別名]
def __init__(self, rpipe, wpipe=None, auto_close=False):
        """Pipe-based stream

        NOTE: reading from or writing to files, use os.open to get the file
        descriptor instead of python's open. Socket file descriptors and
        others are fine.

        when you use os.pipe to generate one write pipe and one read pipe, you
        need to pass both of them into init method.

        :param rpipe: an integer file descriptor which supports read ops
        :param wpipe: an integer file descriptor which supports write ops
        :param auto: flag to indicate to close the stream automatically or not
        """
        assert rpipe is not None
        self._rpipe = rpipe
        self._wpipe = wpipe

        self._rs = (PipeIOStream(self._rpipe) if
                    self._rpipe is not None else None)
        self._ws = (PipeIOStream(self._wpipe) if
                    self._wpipe is not None else None)
        self.auto_close = auto_close
        self.state = StreamState.init

        self.exception = None