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"""
SleekXMPP: The Sleek XMPP Library
Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
This file is part of SleekXMPP.
See the file LICENSE for copying permission.
"""
import socket
try:
import queue
except ImportError:
import Queue as queue
class TestSocket(object):
"""
A dummy socket that reads and writes to queues instead
of an actual networking socket.
Methods:
next_sent -- Return the next sent stanza.
recv_data -- Make a stanza available to read next.
recv -- Read the next stanza from the socket.
send -- Write a stanza to the socket.
makefile -- Dummy call, returns self.
read -- Read the next stanza from the socket.
"""
def __init__(self, *args, **kwargs):
"""
Create a new test socket.
Arguments:
Same as arguments for socket.socket
"""
self.socket = socket.socket(*args, **kwargs)
self.recv_queue = queue.Queue()
self.send_queue = queue.Queue()
self.is_live = False
self.disconnected = False
def __getattr__(self, name):
"""
Return attribute values of internal, dummy socket.
Some attributes and methods are disabled to prevent the
socket from connecting to the network.
Arguments:
name -- Name of the attribute requested.
"""
def dummy(*args):
"""Method to do nothing and prevent actual socket connections."""
return None
overrides = {'connect': dummy,
'close': dummy,
'shutdown': dummy}
return overrides.get(name, getattr(self.socket, name))
# ------------------------------------------------------------------
# Testing Interface
def next_sent(self, timeout=None):
"""
Get the next stanza that has been 'sent'.
Arguments:
timeout -- Optional timeout for waiting for a new value.
"""
args = {'block': False}
if timeout is not None:
args = {'block': True, 'timeout': timeout}
try:
return self.send_queue.get(**args)
except:
return None
def recv_data(self, data):
"""
Add data to the receiving queue.
Arguments:
data -- String data to 'write' to the socket to be received
by the XMPP client.
"""
self.recv_queue.put(data)
def disconnect_error(self):
"""
Simulate a disconnect error by raising a socket.error exception
for any current or further socket operations.
"""
self.disconnected = True
# ------------------------------------------------------------------
# Socket Interface
def recv(self, *args, **kwargs):
"""
Read a value from the received queue.
Arguments:
Placeholders. Same as for socket.Socket.recv.
"""
if self.disconnected:
raise socket.error
return self.read(block=True)
def send(self, data):
"""
Send data by placing it in the send queue.
Arguments:
data -- String value to write.
"""
if self.disconnected:
raise socket.error
self.send_queue.put(data)
# ------------------------------------------------------------------
# File Socket
def makefile(self, *args, **kwargs):
"""
File socket version to use with ElementTree.
Arguments:
Placeholders, same as socket.Socket.makefile()
"""
return self
def read(self, block=True, timeout=None, **kwargs):
"""
Implement the file socket interface.
Arguments:
block -- Indicate if the read should block until a
value is ready.
timeout -- Time in seconds a block should last before
returning None.
"""
if self.disconnected:
raise socket.error
if timeout is not None:
block = True
try:
return self.recv_queue.get(block, timeout)
except:
return None
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