Python BufferedPipe.read_ready方法代码示例

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]
 def test_1_buffered_pipe(self):
     p = BufferedPipe()
     self.assert_(not p.read_ready())
     p.feed('hello.')
     self.assert_(p.read_ready())
     data = p.read(6)
     self.assertEquals('hello.', data)
     
     p.feed('plus/minus')
     self.assertEquals('plu', p.read(3))
     self.assertEquals('s/m', p.read(3))
     self.assertEquals('inus', p.read(4))
     
     p.close()
     self.assert_(not p.read_ready())
     self.assertEquals('', p.read(1))

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]
    def test_1_buffered_pipe(self):
        p = BufferedPipe()
        self.assertTrue(not p.read_ready())
        p.feed("hello.")
        self.assertTrue(p.read_ready())
        data = p.read(6)
        self.assertEqual(b"hello.", data)

        p.feed("plus/minus")
        self.assertEqual(b"plu", p.read(3))
        self.assertEqual(b"s/m", p.read(3))
        self.assertEqual(b"inus", p.read(4))

        p.close()
        self.assertTrue(not p.read_ready())
        self.assertEqual(b"", p.read(1))

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]
 def test_2_delay(self):
     p = BufferedPipe()
     self.assert_(not p.read_ready())
     threading.Thread(target=delay_thread, args=(p,)).start()
     self.assertEquals('a', p.read(1, 0.1))
     try:
         p.read(1, 0.1)
         self.assert_(False)
     except PipeTimeout:
         pass
     self.assertEquals('b', p.read(1, 1.0))
     self.assertEquals('', p.read(1))

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]

#.........这里部分代码省略.........
        will fail.  The remote end will receive no more data (after queued data
        is flushed).  Channels are automatically closed when their `.Transport`
        is closed or when they are garbage collected.
        """
        self.lock.acquire()
        try:
            # only close the pipe when the user explicitly closes the channel.
            # otherwise they will get unpleasant surprises.  (and do it before
            # checking self.closed, since the remote host may have already
            # closed the connection.)
            if self._pipe is not None:
                self._pipe.close()
                self._pipe = None

            if not self.active or self.closed:
                return
            msgs = self._close_internal()
        finally:
            self.lock.release()
        for m in msgs:
            if m is not None:
                self.transport._send_user_message(m)

    def recv_ready(self):
        """
        Returns true if data is buffered and ready to be read from this
        channel.  A ``False`` result does not mean that the channel has closed;
        it means you may need to wait before more data arrives.

        :return:
            ``True`` if a `recv` call on this channel would immediately return
            at least one byte; ``False`` otherwise.
        """
        return self.in_buffer.read_ready()

    def recv(self, nbytes):
        """
        Receive data from the channel.  The return value is a string
        representing the data received.  The maximum amount of data to be
        received at once is specified by ``nbytes``.  If a string of length zero
        is returned, the channel stream has closed.

        :param int nbytes: maximum number of bytes to read.
        :return: received data, as a `bytes`

        :raises socket.timeout:
            if no data is ready before the timeout set by `settimeout`.
        """
        try:
            out = self.in_buffer.read(nbytes, self.timeout)
        except PipeTimeout:
            raise socket.timeout()

        ack = self._check_add_window(len(out))
        # no need to hold the channel lock when sending this
        if ack > 0:
            m = Message()
            m.add_byte(cMSG_CHANNEL_WINDOW_ADJUST)
            m.add_int(self.remote_chanid)
            m.add_int(ack)
            self.transport._send_user_message(m)

        return out

    def recv_stderr_ready(self):
        """

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]

#.........这里部分代码省略.........
        Set blocking or non-blocking mode of the channel: if C{blocking} is 0,
        the channel is set to non-blocking mode; otherwise it's set to blocking
        mode.  Initially all channels are in blocking mode.

        In non-blocking mode, if a L{recv} call doesn't find any data, or if a
        L{send} call can't immediately dispose of the data, an error exception
        is raised.  In blocking mode, the calls block until they can proceed.

        C{chan.setblocking(0)} is equivalent to C{chan.settimeout(0)};
        C{chan.setblocking(1)} is equivalent to C{chan.settimeout(None)}.

        @param blocking: 0 to set non-blocking mode; non-0 to set blocking
        mode.
        @type blocking: int
        """
        if blocking:
            self.settimeout(None)
        else:
            self.settimeout(0.0)

    def getpeername(self):
        """
        Return the address of the remote side of this Channel, if possible.
        This is just a wrapper around C{'getpeername'} on the Transport, used
        to provide enough of a socket-like interface to allow asyncore to work.
        (asyncore likes to call C{'getpeername'}.)

        @return: the address if the remote host, if known
        @rtype: tuple(str, int)
        """
        return self.transport.getpeername()

    def close(self):
        """
        Close the channel.  All future read/write operations on the channel
        will fail.  The remote end will receive no more data (after queued data
        is flushed).  Channels are automatically closed when their L{Transport}
        is closed or when they are garbage collected.
        """
        self.lock.acquire()
        try:
            # only close the pipe when the user explicitly closes the channel.
            # otherwise they will get unpleasant surprises.  (and do it before
            # checking self.closed, since the remote host may have already
            # closed the connection.)
            if self._pipe is not None:
                self._pipe.close()
                self._pipe = None

            if not self.active or self.closed:
                return
            msgs = self._close_internal()
        finally:
            self.lock.release()
        for m in msgs:
            if m is not None:
                self.transport._send_user_message(m)

    def recv_ready(self):
        """
        Returns true if data is buffered and ready to be read from this
        channel.  A C{False} result does not mean that the channel has closed;
        it means you may need to wait before more data arrives.
        
        @return: C{True} if a L{recv} call on this channel would immediately
            return at least one byte; C{False} otherwise.
        @rtype: boolean
        """
        return self.in_buffer.read_ready()

    def recv(self, nbytes):
        """
        Receive data from the channel.  The return value is a string
        representing the data received.  The maximum amount of data to be
        received at once is specified by C{nbytes}.  If a string of length zero
        is returned, the channel stream has closed.

        @param nbytes: maximum number of bytes to read.
        @type nbytes: int
        @return: data.
        @rtype: str
        
        @raise socket.timeout: if no data is ready before the timeout set by
            L{settimeout}.
        """
        try:
            out = self.in_buffer.read(nbytes, self.timeout)
        except PipeTimeout, e:
            raise socket.timeout()

        ack = self._check_add_window(len(out))
        # no need to hold the channel lock when sending this
        if ack > 0:
            m = Message()
            m.add_byte(chr(MSG_CHANNEL_WINDOW_ADJUST))
            m.add_int(self.remote_chanid)
            m.add_int(ack)
            self.transport._send_user_message(m)

        return out

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]

#.........这里部分代码省略.........

    def setblocking(self, blocking):
        """
        Set blocking or non-blocking mode of the channel: if ``blocking`` is 0,
        the channel is set to non-blocking mode; otherwise it's set to blocking
        mode. Initially all channels are in blocking mode.

        In non-blocking mode, if a `recv` call doesn't find any data, or if a
        `send` call can't immediately dispose of the data, an error exception
        is raised. In blocking mode, the calls block until they can proceed. An
        EOF condition is considered "immediate data" for `recv`, so if the
        channel is closed in the read direction, it will never block.

        ``chan.setblocking(0)`` is equivalent to ``chan.settimeout(0)``;
        ``chan.setblocking(1)`` is equivalent to ``chan.settimeout(None)``.

        :param int blocking:
            0 to set non-blocking mode; non-0 to set blocking mode.
        """
        if blocking:
            self.settimeout(None)
        else:
            self.settimeout(0.0)

    def getpeername(self):
        """
        Return the address of the remote side of this Channel, if possible.

        This simply wraps `.Transport.getpeername`, used to provide enough of a
        socket-like interface to allow asyncore to work. (asyncore likes to
        call ``'getpeername'``.)
        """
        return self.transport.getpeername()

    def close(self):
        """
        Close the channel.  All future read/write operations on the channel
        will fail.  The remote end will receive no more data (after queued data
        is flushed).  Channels are automatically closed when their `.Transport`
        is closed or when they are garbage collected.
        """
        self.lock.acquire()
        try:
            # only close the pipe when the user explicitly closes the channel.
            # otherwise they will get unpleasant surprises.  (and do it before
            # checking self.closed, since the remote host may have already
            # closed the connection.)
            if self._pipe is not None:
                self._pipe.close()
                self._pipe = None

            if not self.active or self.closed:
                return
            msgs = self._close_internal()
        finally:
            self.lock.release()
        for m in msgs:
            if m is not None:
                self.transport._send_user_message(m)

    def recv_ready(self):
        """
        Returns true if data is buffered and ready to be read from this
        channel.  A ``False`` result does not mean that the channel has closed;
        it means you may need to wait before more data arrives.
        
        :return:
            ``True`` if a `recv` call on this channel would immediately return
            at least one byte; ``False`` otherwise.
        """
        return self.in_buffer.read_ready()

    def recv(self, nbytes):
        """
        Receive data from the channel.  The return value is a string
        representing the data received.  The maximum amount of data to be
        received at once is specified by ``nbytes``.  If a string of length zero
        is returned, the channel stream has closed.

        :param int nbytes: maximum number of bytes to read.
        :return: received data, as a `str`
        
        :raises socket.timeout:
            if no data is ready before the timeout set by `settimeout`.
        """
        try:
            out = self.in_buffer.read(nbytes, self.timeout)
        except PipeTimeout, e:
            raise socket.timeout()

        ack = self._check_add_window(len(out))
        # no need to hold the channel lock when sending this
        if ack > 0:
            m = Message()
            m.add_byte(chr(MSG_CHANNEL_WINDOW_ADJUST))
            m.add_int(self.remote_chanid)
            m.add_int(ack)
            self.transport._send_user_message(m)

        return out

# 需要导入模块: from paramiko.buffered_pipe import BufferedPipe [as 别名]
# 或者: from paramiko.buffered_pipe.BufferedPipe import read_ready [as 别名]

#.........这里部分代码省略.........
        will fail.  The remote end will receive no more data (after queued data
        is flushed).  Channels are automatically closed when their L{Transport}
        is closed or when they are garbage collected.
        """
        self.lock.acquire()
        try:
            # only close the pipe when the user explicitly closes the channel.
            # otherwise they will get unpleasant surprises.  (and do it before
            # checking self.closed, since the remote host may have already
            # closed the connection.)
            if self._pipe is not None:
                self._pipe.close()
                self._pipe = None

            if not self.active or self.closed:
                return
            msgs = self._close_internal()
        finally:
            self.lock.release()
        for m in msgs:
            if m is not None:
                self.transport._send_user_message(m)

    def recv_ready(self):
        """
        Returns true if data is buffered and ready to be read from this
        channel.  A C{False} result does not mean that the channel has closed;
        it means you may need to wait before more data arrives.

        @return: C{True} if a L{recv} call on this channel would immediately
            return at least one byte; C{False} otherwise.
        @rtype: boolean
        """
        return self.in_buffer.read_ready()

    def recv(self, nbytes):
        """
        Receive data from the channel.  The return value is a string
        representing the data received.  The maximum amount of data to be
        received at once is specified by C{nbytes}.  If a string of length zero
        is returned, the channel stream has closed.

        @param nbytes: maximum number of bytes to read.
        @type nbytes: int
        @return: data.
        @rtype: str

        @raise socket.timeout: if no data is ready before the timeout set by
            L{settimeout}.
        """
        try:
            out = self.in_buffer.read(nbytes, self.timeout)
        except PipeTimeout as e:
            raise socket.timeout()

        ack = self._check_add_window(len(out))
        # no need to hold the channel lock when sending this
        if ack > 0:
            m = Message()
            m.add_byte(chr(MSG_CHANNEL_WINDOW_ADJUST))
            m.add_int(self.remote_chanid)
            m.add_int(ack)
            self.transport._send_user_message(m)

        return out