948 lines
36 KiB
Python
948 lines
36 KiB
Python
"""
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SleekXMPP: The Sleek XMPP Library
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Copyright (C) 2010 Nathanael C. Fritz
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This file is part of SleekXMPP.
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See the file LICENSE for copying permission.
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"""
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from __future__ import with_statement, unicode_literals
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import copy
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import logging
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import socket as Socket
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import ssl
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import sys
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import threading
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import time
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import types
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import signal
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try:
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import queue
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except ImportError:
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import Queue as queue
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from sleekxmpp.thirdparty.statemachine import StateMachine
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from sleekxmpp.xmlstream import Scheduler, tostring
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from sleekxmpp.xmlstream.stanzabase import StanzaBase, ET
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# In Python 2.x, file socket objects are broken. A patched socket
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# wrapper is provided for this case in filesocket.py.
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if sys.version_info < (3, 0):
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from sleekxmpp.xmlstream.filesocket import FileSocket, Socket26
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# The time in seconds to wait before timing out waiting for response stanzas.
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RESPONSE_TIMEOUT = 10
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# The number of threads to use to handle XML stream events. This is not the
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# same as the number of custom event handling threads. HANDLER_THREADS must
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# be at least 1.
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HANDLER_THREADS = 1
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# Flag indicating if the SSL library is available for use.
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SSL_SUPPORT = True
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log = logging.getLogger(__name__)
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class RestartStream(Exception):
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"""
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Exception to restart stream processing, including
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resending the stream header.
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"""
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class XMLStream(object):
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"""
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An XML stream connection manager and event dispatcher.
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The XMLStream class abstracts away the issues of establishing a
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connection with a server and sending and receiving XML "stanzas".
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A stanza is a complete XML element that is a direct child of a root
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document element. Two streams are used, one for each communication
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direction, over the same socket. Once the connection is closed, both
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streams should be complete and valid XML documents.
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Three types of events are provided to manage the stream:
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Stream -- Triggered based on received stanzas, similar in concept
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to events in a SAX XML parser.
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Custom -- Triggered manually.
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Scheduled -- Triggered based on time delays.
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Typically, stanzas are first processed by a stream event handler which
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will then trigger custom events to continue further processing,
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especially since custom event handlers may run in individual threads.
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Attributes:
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address -- The hostname and port of the server.
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default_ns -- The default XML namespace that will be applied
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to all non-namespaced stanzas.
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event_queue -- A queue of stream, custom, and scheduled
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events to be processed.
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filesocket -- A filesocket created from the main connection socket.
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Required for ElementTree.iterparse.
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namespace_map -- Optional mapping of namespaces to namespace prefixes.
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scheduler -- A scheduler object for triggering events
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after a given period of time.
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send_queue -- A queue of stanzas to be sent on the stream.
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socket -- The connection to the server.
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ssl_support -- Indicates if a SSL library is available for use.
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ssl_version -- The version of the SSL protocol to use.
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Defaults to ssl.PROTOCOL_TLSv1.
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state -- A state machine for managing the stream's
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connection state.
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stream_footer -- The start tag and any attributes for the stream's
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root element.
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stream_header -- The closing tag of the stream's root element.
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use_ssl -- Flag indicating if SSL should be used.
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use_tls -- Flag indicating if TLS should be used.
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stop -- threading Event used to stop all threads.
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auto_reconnect-- Flag to determine whether we auto reconnect.
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Methods:
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add_event_handler -- Add a handler for a custom event.
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add_handler -- Shortcut method for registerHandler.
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connect -- Connect to the given server.
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del_event_handler -- Remove a handler for a custom event.
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disconnect -- Disconnect from the server and terminate
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processing.
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event -- Trigger a custom event.
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get_id -- Return the current stream ID.
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incoming_filter -- Optionally filter stanzas before processing.
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new_id -- Generate a new, unique ID value.
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process -- Read XML stanzas from the stream and apply
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matching stream handlers.
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reconnect -- Reestablish a connection to the server.
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register_handler -- Add a handler for a stream event.
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register_stanza -- Add a new stanza object type that may appear
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as a direct child of the stream's root.
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remove_handler -- Remove a stream handler.
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remove_stanza -- Remove a stanza object type.
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schedule -- Schedule an event handler to execute after a
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given delay.
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send -- Send a stanza object on the stream.
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send_raw -- Send a raw string on the stream.
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send_xml -- Send an XML string on the stream.
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set_socket -- Set the stream's socket and generate a new
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filesocket.
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start_stream_handler -- Perform any stream initialization such
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as handshakes.
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start_tls -- Establish a TLS connection and restart
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the stream.
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"""
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def __init__(self, socket=None, host='', port=0):
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"""
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Establish a new XML stream.
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Arguments:
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socket -- Use an existing socket for the stream.
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Defaults to None to generate a new socket.
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host -- The name of the target server.
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Defaults to the empty string.
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port -- The port to use for the connection.
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Defaults to 0.
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"""
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# To comply with PEP8, method names now use underscores.
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# Deprecated method names are re-mapped for backwards compatibility.
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self.startTLS = self.start_tls
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self.registerStanza = self.register_stanza
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self.removeStanza = self.remove_stanza
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self.registerHandler = self.register_handler
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self.removeHandler = self.remove_handler
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self.setSocket = self.set_socket
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self.sendRaw = self.send_raw
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self.getId = self.get_id
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self.getNewId = self.new_id
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self.sendXML = self.send_xml
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self.ssl_support = SSL_SUPPORT
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self.ssl_version = ssl.PROTOCOL_TLSv1
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self.state = StateMachine(('disconnected', 'connected'))
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self.state._set_state('disconnected')
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self.address = (host, int(port))
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self.filesocket = None
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self.set_socket(socket)
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if sys.version_info < (3, 0):
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self.socket_class = Socket26
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else:
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self.socket_class = Socket.socket
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self.use_ssl = False
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self.use_tls = False
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self.default_ns = ''
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self.stream_header = "<stream>"
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self.stream_footer = "</stream>"
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self.stop = threading.Event()
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self.stream_end_event = threading.Event()
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self.stream_end_event.set()
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self.event_queue = queue.Queue()
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self.send_queue = queue.Queue()
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self.scheduler = Scheduler(self.event_queue, self.stop)
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self.namespace_map = {}
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self.__thread = {}
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self.__root_stanza = []
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self.__handlers = []
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self.__event_handlers = {}
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self.__event_handlers_lock = threading.Lock()
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self._id = 0
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self._id_lock = threading.Lock()
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self.auto_reconnect = True
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self.is_client = False
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try:
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if hasattr(signal, 'SIGHUP'):
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signal.signal(signal.SIGHUP, self._handle_kill)
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if hasattr(signal, 'SIGTERM'):
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# Used in Windows
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signal.signal(signal.SIGTERM, self._handle_kill)
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except:
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log.debug("Can not set interrupt signal handlers. " + \
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"SleekXMPP is not running from a main thread.")
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def _handle_kill(self, signum, frame):
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"""
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Capture kill event and disconnect cleanly after first
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spawning the "killed" event.
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"""
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self.event("killed", direct=True)
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self.disconnect()
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def new_id(self):
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"""
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Generate and return a new stream ID in hexadecimal form.
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Many stanzas, handlers, or matchers may require unique
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ID values. Using this method ensures that all new ID values
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are unique in this stream.
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"""
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with self._id_lock:
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self._id += 1
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return self.get_id()
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def get_id(self):
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"""
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Return the current unique stream ID in hexadecimal form.
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"""
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return "%X" % self._id
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def connect(self, host='', port=0, use_ssl=False,
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use_tls=True, reattempt=True):
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"""
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Create a new socket and connect to the server.
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Setting reattempt to True will cause connection attempts to be made
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every second until a successful connection is established.
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Arguments:
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host -- The name of the desired server for the connection.
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port -- Port to connect to on the server.
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use_ssl -- Flag indicating if SSL should be used.
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use_tls -- Flag indicating if TLS should be used.
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reattempt -- Flag indicating if the socket should reconnect
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after disconnections.
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"""
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if host and port:
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self.address = (host, int(port))
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self.is_client = True
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# Respect previous SSL and TLS usage directives.
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if use_ssl is not None:
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self.use_ssl = use_ssl
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if use_tls is not None:
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self.use_tls = use_tls
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# Repeatedly attempt to connect until a successful connection
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# is established.
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connected = self.state.transition('disconnected', 'connected',
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func=self._connect)
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while reattempt and not connected:
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connected = self.state.transition('disconnected', 'connected',
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func=self._connect)
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return connected
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def _connect(self):
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self.stop.clear()
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self.socket = self.socket_class(Socket.AF_INET, Socket.SOCK_STREAM)
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self.socket.settimeout(None)
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if self.use_ssl and self.ssl_support:
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log.debug("Socket Wrapped for SSL")
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ssl_socket = ssl.wrap_socket(self.socket)
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if hasattr(self.socket, 'socket'):
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# We are using a testing socket, so preserve the top
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# layer of wrapping.
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self.socket.socket = ssl_socket
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else:
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self.socket = ssl_socket
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try:
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log.debug("Connecting to %s:%s" % self.address)
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self.socket.connect(self.address)
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self.set_socket(self.socket, ignore=True)
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#this event is where you should set your application state
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self.event("connected", direct=True)
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return True
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except Socket.error as serr:
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error_msg = "Could not connect to %s:%s. Socket Error #%s: %s"
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log.error(error_msg % (self.address[0], self.address[1],
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serr.errno, serr.strerror))
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time.sleep(1)
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return False
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def disconnect(self, reconnect=False):
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"""
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Terminate processing and close the XML streams.
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Optionally, the connection may be reconnected and
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resume processing afterwards.
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Arguments:
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reconnect -- Flag indicating if the connection
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and processing should be restarted.
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Defaults to False.
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"""
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self.state.transition('connected', 'disconnected', wait=0.0,
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func=self._disconnect, args=(reconnect,))
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def _disconnect(self, reconnect=False):
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# Send the end of stream marker.
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self.send_raw(self.stream_footer)
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# Wait for confirmation that the stream was
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# closed in the other direction.
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if not reconnect:
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self.auto_reconnect = False
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self.stream_end_event.wait(4)
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if not self.auto_reconnect:
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self.stop.set()
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try:
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self.socket.close()
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self.filesocket.close()
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self.socket.shutdown(Socket.SHUT_RDWR)
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except Socket.error as serr:
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pass
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finally:
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#clear your application state
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self.event("disconnected", direct=True)
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return True
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def reconnect(self):
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"""
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Reset the stream's state and reconnect to the server.
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"""
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log.debug("reconnecting...")
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self.state.transition('connected', 'disconnected', wait=2.0,
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func=self._disconnect, args=(True,))
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log.debug("connecting...")
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return self.state.transition('disconnected', 'connected',
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wait=2.0, func=self._connect)
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def set_socket(self, socket, ignore=False):
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"""
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Set the socket to use for the stream.
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The filesocket will be recreated as well.
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Arguments:
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socket -- The new socket to use.
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ignore -- don't set the state
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"""
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self.socket = socket
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if socket is not None:
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# ElementTree.iterparse requires a file.
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# 0 buffer files have to be binary.
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# Use the correct fileobject type based on the Python
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# version to work around a broken implementation in
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# Python 2.x.
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if sys.version_info < (3, 0):
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self.filesocket = FileSocket(self.socket)
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else:
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self.filesocket = self.socket.makefile('rb', 0)
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if not ignore:
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self.state._set_state('connected')
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def start_tls(self):
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"""
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Perform handshakes for TLS.
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If the handshake is successful, the XML stream will need
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to be restarted.
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"""
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if self.ssl_support:
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log.info("Negotiating TLS")
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log.info("Using SSL version: %s" % str(self.ssl_version))
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ssl_socket = ssl.wrap_socket(self.socket,
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ssl_version=self.ssl_version,
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do_handshake_on_connect=False)
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if hasattr(self.socket, 'socket'):
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# We are using a testing socket, so preserve the top
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# layer of wrapping.
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self.socket.socket = ssl_socket
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else:
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self.socket = ssl_socket
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self.socket.do_handshake()
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self.set_socket(self.socket)
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return True
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else:
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log.warning("Tried to enable TLS, but ssl module not found.")
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return False
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def start_stream_handler(self, xml):
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"""
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Perform any initialization actions, such as handshakes, once the
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stream header has been sent.
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Meant to be overridden.
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"""
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pass
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def register_stanza(self, stanza_class):
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"""
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Add a stanza object class as a known root stanza. A root stanza is
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one that appears as a direct child of the stream's root element.
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Stanzas that appear as substanzas of a root stanza do not need to
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be registered here. That is done using register_stanza_plugin() from
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sleekxmpp.xmlstream.stanzabase.
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Stanzas that are not registered will not be converted into
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stanza objects, but may still be processed using handlers and
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matchers.
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Arguments:
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stanza_class -- The top-level stanza object's class.
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"""
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self.__root_stanza.append(stanza_class)
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def remove_stanza(self, stanza_class):
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"""
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Remove a stanza from being a known root stanza. A root stanza is
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one that appears as a direct child of the stream's root element.
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Stanzas that are not registered will not be converted into
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stanza objects, but may still be processed using handlers and
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matchers.
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"""
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del self.__root_stanza[stanza_class]
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def add_handler(self, mask, pointer, name=None, disposable=False,
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threaded=False, filter=False, instream=False):
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"""
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A shortcut method for registering a handler using XML masks.
|
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Arguments:
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mask -- An XML snippet matching the structure of the
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stanzas that will be passed to this handler.
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pointer -- The handler function itself.
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name -- A unique name for the handler. A name will
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be generated if one is not provided.
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disposable -- Indicates if the handler should be discarded
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after one use.
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threaded -- Deprecated. Remains for backwards compatibility.
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filter -- Deprecated. Remains for backwards compatibility.
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instream -- Indicates if the handler should execute during
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stream processing and not during normal event
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processing.
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"""
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# To prevent circular dependencies, we must load the matcher
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# and handler classes here.
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from sleekxmpp.xmlstream.matcher import MatchXMLMask
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from sleekxmpp.xmlstream.handler import XMLCallback
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|
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if name is None:
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name = 'add_handler_%s' % self.getNewId()
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self.registerHandler(XMLCallback(name, MatchXMLMask(mask), pointer,
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once=disposable, instream=instream))
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|
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def register_handler(self, handler, before=None, after=None):
|
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"""
|
|
Add a stream event handler that will be executed when a matching
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stanza is received.
|
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|
|
Arguments:
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handler -- The handler object to execute.
|
|
"""
|
|
if handler.stream is None:
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self.__handlers.append(handler)
|
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handler.stream = self
|
|
|
|
def remove_handler(self, name):
|
|
"""
|
|
Remove any stream event handlers with the given name.
|
|
|
|
Arguments:
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name -- The name of the handler.
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|
"""
|
|
idx = 0
|
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for handler in self.__handlers:
|
|
if handler.name == name:
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self.__handlers.pop(idx)
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return True
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idx += 1
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return False
|
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|
|
def add_event_handler(self, name, pointer,
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threaded=False, disposable=False):
|
|
"""
|
|
Add a custom event handler that will be executed whenever
|
|
its event is manually triggered.
|
|
|
|
Arguments:
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name -- The name of the event that will trigger
|
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this handler.
|
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pointer -- The function to execute.
|
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threaded -- If set to True, the handler will execute
|
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in its own thread. Defaults to False.
|
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disposable -- If set to True, the handler will be
|
|
discarded after one use. Defaults to False.
|
|
"""
|
|
if not name in self.__event_handlers:
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self.__event_handlers[name] = []
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self.__event_handlers[name].append((pointer, threaded, disposable))
|
|
|
|
def del_event_handler(self, name, pointer):
|
|
"""
|
|
Remove a function as a handler for an event.
|
|
|
|
Arguments:
|
|
name -- The name of the event.
|
|
pointer -- The function to remove as a handler.
|
|
"""
|
|
if not name in self.__event_handlers:
|
|
return
|
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|
|
# Need to keep handlers that do not use
|
|
# the given function pointer
|
|
def filter_pointers(handler):
|
|
return handler[0] != pointer
|
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|
|
self.__event_handlers[name] = filter(filter_pointers,
|
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self.__event_handlers[name])
|
|
|
|
def event_handled(self, name):
|
|
"""
|
|
Indicates if an event has any associated handlers.
|
|
|
|
Returns the number of registered handlers.
|
|
|
|
Arguments:
|
|
name -- The name of the event to check.
|
|
"""
|
|
return len(self.__event_handlers.get(name, []))
|
|
|
|
def event(self, name, data={}, direct=False):
|
|
"""
|
|
Manually trigger a custom event.
|
|
|
|
Arguments:
|
|
name -- The name of the event to trigger.
|
|
data -- Data that will be passed to each event handler.
|
|
Defaults to an empty dictionary.
|
|
direct -- Runs the event directly if True, skipping the
|
|
event queue. All event handlers will run in the
|
|
same thread.
|
|
"""
|
|
for handler in self.__event_handlers.get(name, []):
|
|
if direct:
|
|
try:
|
|
handler[0](copy.copy(data))
|
|
except Exception as e:
|
|
error_msg = 'Error processing event handler: %s'
|
|
log.exception(error_msg % str(handler[0]))
|
|
if hasattr(data, 'exception'):
|
|
data.exception(e)
|
|
else:
|
|
self.event_queue.put(('event', handler, copy.copy(data)))
|
|
|
|
if handler[2]:
|
|
# If the handler is disposable, we will go ahead and
|
|
# remove it now instead of waiting for it to be
|
|
# processed in the queue.
|
|
with self.__event_handlers_lock:
|
|
try:
|
|
h_index = self.__event_handlers[name].index(handler)
|
|
self.__event_handlers[name].pop(h_index)
|
|
except:
|
|
pass
|
|
|
|
def schedule(self, name, seconds, callback, args=None,
|
|
kwargs=None, repeat=False):
|
|
"""
|
|
Schedule a callback function to execute after a given delay.
|
|
|
|
Arguments:
|
|
name -- A unique name for the scheduled callback.
|
|
seconds -- The time in seconds to wait before executing.
|
|
callback -- A pointer to the function to execute.
|
|
args -- A tuple of arguments to pass to the function.
|
|
kwargs -- A dictionary of keyword arguments to pass to
|
|
the function.
|
|
repeat -- Flag indicating if the scheduled event should
|
|
be reset and repeat after executing.
|
|
"""
|
|
self.scheduler.add(name, seconds, callback, args, kwargs,
|
|
repeat, qpointer=self.event_queue)
|
|
|
|
def incoming_filter(self, xml):
|
|
"""
|
|
Filter incoming XML objects before they are processed.
|
|
|
|
Possible uses include remapping namespaces, or correcting elements
|
|
from sources with incorrect behavior.
|
|
|
|
Meant to be overridden.
|
|
"""
|
|
return xml
|
|
|
|
def send(self, data, mask=None, timeout=RESPONSE_TIMEOUT):
|
|
"""
|
|
A wrapper for send_raw for sending stanza objects.
|
|
|
|
May optionally block until an expected response is received.
|
|
|
|
Arguments:
|
|
data -- The stanza object to send on the stream.
|
|
mask -- Deprecated. An XML snippet matching the structure
|
|
of the expected response. Execution will block
|
|
in this thread until the response is received
|
|
or a timeout occurs.
|
|
timeout -- Time in seconds to wait for a response before
|
|
continuing. Defaults to RESPONSE_TIMEOUT.
|
|
"""
|
|
if hasattr(mask, 'xml'):
|
|
mask = mask.xml
|
|
data = str(data)
|
|
if mask is not None:
|
|
log.warning("Use of send mask waiters is deprecated.")
|
|
wait_for = Waiter("SendWait_%s" % self.new_id(),
|
|
MatchXMLMask(mask))
|
|
self.register_handler(wait_for)
|
|
self.send_raw(data)
|
|
if mask is not None:
|
|
return wait_for.wait(timeout)
|
|
|
|
def send_raw(self, data):
|
|
"""
|
|
Send raw data across the stream.
|
|
|
|
Arguments:
|
|
data -- Any string value.
|
|
"""
|
|
self.send_queue.put(data)
|
|
return True
|
|
|
|
def send_xml(self, data, mask=None, timeout=RESPONSE_TIMEOUT):
|
|
"""
|
|
Send an XML object on the stream, and optionally wait
|
|
for a response.
|
|
|
|
Arguments:
|
|
data -- The XML object to send on the stream.
|
|
mask -- Deprecated. An XML snippet matching the structure
|
|
of the expected response. Execution will block
|
|
in this thread until the response is received
|
|
or a timeout occurs.
|
|
timeout -- Time in seconds to wait for a response before
|
|
continuing. Defaults to RESPONSE_TIMEOUT.
|
|
"""
|
|
return self.send(tostring(data), mask, timeout)
|
|
|
|
def process(self, threaded=True):
|
|
"""
|
|
Initialize the XML streams and begin processing events.
|
|
|
|
The number of threads used for processing stream events is determined
|
|
by HANDLER_THREADS.
|
|
|
|
Arguments:
|
|
threaded -- If threaded=True then event dispatcher will run
|
|
in a separate thread, allowing for the stream to be
|
|
used in the background for another application.
|
|
Defaults to True.
|
|
|
|
Event handlers and the send queue will be threaded
|
|
regardless of this parameter's value.
|
|
"""
|
|
self.scheduler.process(threaded=True)
|
|
|
|
def start_thread(name, target):
|
|
self.__thread[name] = threading.Thread(name=name, target=target)
|
|
self.__thread[name].start()
|
|
|
|
for t in range(0, HANDLER_THREADS):
|
|
log.debug("Starting HANDLER THREAD")
|
|
start_thread('stream_event_handler_%s' % t, self._event_runner)
|
|
|
|
start_thread('send_thread', self._send_thread)
|
|
|
|
if threaded:
|
|
# Run the XML stream in the background for another application.
|
|
start_thread('process', self._process)
|
|
else:
|
|
self._process()
|
|
|
|
def _process(self):
|
|
"""
|
|
Start processing the XML streams.
|
|
|
|
Processing will continue after any recoverable errors
|
|
if reconnections are allowed.
|
|
"""
|
|
firstrun = True
|
|
|
|
# The body of this loop will only execute once per connection.
|
|
# Additional passes will be made only if an error occurs and
|
|
# reconnecting is permitted.
|
|
while firstrun or (self.auto_reconnect and not self.stop.isSet()):
|
|
firstrun = False
|
|
try:
|
|
if self.is_client:
|
|
self.send_raw(self.stream_header)
|
|
# The call to self.__read_xml will block and prevent
|
|
# the body of the loop from running until a disconnect
|
|
# occurs. After any reconnection, the stream header will
|
|
# be resent and processing will resume.
|
|
while not self.stop.isSet() and self.__read_xml():
|
|
# Ensure the stream header is sent for any
|
|
# new connections.
|
|
if self.is_client:
|
|
self.send_raw(self.stream_header)
|
|
except KeyboardInterrupt:
|
|
log.debug("Keyboard Escape Detected in _process")
|
|
self.stop.set()
|
|
except SystemExit:
|
|
log.debug("SystemExit in _process")
|
|
self.stop.set()
|
|
except Socket.error:
|
|
log.exception('Socket Error')
|
|
except:
|
|
if not self.stop.isSet():
|
|
log.exception('Connection error.')
|
|
if not self.stop.isSet() and self.auto_reconnect:
|
|
self.reconnect()
|
|
else:
|
|
self.disconnect()
|
|
self.event_queue.put(('quit', None, None))
|
|
self.scheduler.run = False
|
|
|
|
def __read_xml(self):
|
|
"""
|
|
Parse the incoming XML stream, raising stream events for
|
|
each received stanza.
|
|
"""
|
|
depth = 0
|
|
root = None
|
|
for (event, xml) in ET.iterparse(self.filesocket, (b'end', b'start')):
|
|
if event == b'start':
|
|
if depth == 0:
|
|
# We have received the start of the root element.
|
|
root = xml
|
|
# Perform any stream initialization actions, such
|
|
# as handshakes.
|
|
self.stream_end_event.clear()
|
|
self.start_stream_handler(root)
|
|
depth += 1
|
|
if event == b'end':
|
|
depth -= 1
|
|
if depth == 0:
|
|
# The stream's root element has closed,
|
|
# terminating the stream.
|
|
log.debug("End of stream recieved")
|
|
self.stream_end_event.set()
|
|
return False
|
|
elif depth == 1:
|
|
# We only raise events for stanzas that are direct
|
|
# children of the root element.
|
|
try:
|
|
self.__spawn_event(xml)
|
|
except RestartStream:
|
|
return True
|
|
if root:
|
|
# Keep the root element empty of children to
|
|
# save on memory use.
|
|
root.clear()
|
|
log.debug("Ending read XML loop")
|
|
|
|
def _build_stanza(self, xml, default_ns=None):
|
|
"""
|
|
Create a stanza object from a given XML object.
|
|
|
|
If a specialized stanza type is not found for the XML, then
|
|
a generic StanzaBase stanza will be returned.
|
|
|
|
Arguments:
|
|
xml -- The XML object to convert into a stanza object.
|
|
default_ns -- Optional default namespace to use instead of the
|
|
stream's current default namespace.
|
|
"""
|
|
if default_ns is None:
|
|
default_ns = self.default_ns
|
|
stanza_type = StanzaBase
|
|
for stanza_class in self.__root_stanza:
|
|
if xml.tag == "{%s}%s" % (default_ns, stanza_class.name):
|
|
stanza_type = stanza_class
|
|
break
|
|
stanza = stanza_type(self, xml)
|
|
return stanza
|
|
|
|
def __spawn_event(self, xml):
|
|
"""
|
|
Analyze incoming XML stanzas and convert them into stanza
|
|
objects if applicable and queue stream events to be processed
|
|
by matching handlers.
|
|
|
|
Arguments:
|
|
xml -- The XML stanza to analyze.
|
|
"""
|
|
log.debug("RECV: %s" % tostring(xml,
|
|
xmlns=self.default_ns,
|
|
stream=self))
|
|
# Apply any preprocessing filters.
|
|
xml = self.incoming_filter(xml)
|
|
|
|
# Convert the raw XML object into a stanza object. If no registered
|
|
# stanza type applies, a generic StanzaBase stanza will be used.
|
|
stanza_type = StanzaBase
|
|
for stanza_class in self.__root_stanza:
|
|
if xml.tag == "{%s}%s" % (self.default_ns, stanza_class.name):
|
|
stanza_type = stanza_class
|
|
break
|
|
stanza = stanza_type(self, xml)
|
|
|
|
# Match the stanza against registered handlers. Handlers marked
|
|
# to run "in stream" will be executed immediately; the rest will
|
|
# be queued.
|
|
unhandled = True
|
|
for handler in self.__handlers:
|
|
if handler.match(stanza):
|
|
stanza_copy = stanza_type(self, copy.deepcopy(xml))
|
|
handler.prerun(stanza_copy)
|
|
self.event_queue.put(('stanza', handler, stanza_copy))
|
|
try:
|
|
if handler.check_delete():
|
|
self.__handlers.pop(self.__handlers.index(handler))
|
|
except:
|
|
pass # not thread safe
|
|
unhandled = False
|
|
|
|
# Some stanzas require responses, such as Iq queries. A default
|
|
# handler will be executed immediately for this case.
|
|
if unhandled:
|
|
stanza.unhandled()
|
|
|
|
def _threaded_event_wrapper(self, func, args):
|
|
"""
|
|
Capture exceptions for event handlers that run
|
|
in individual threads.
|
|
|
|
Arguments:
|
|
func -- The event handler to execute.
|
|
args -- Arguments to the event handler.
|
|
"""
|
|
try:
|
|
func(*args)
|
|
except Exception as e:
|
|
error_msg = 'Error processing event handler: %s'
|
|
log.exception(error_msg % str(func))
|
|
if hasattr(args[0], 'exception'):
|
|
args[0].exception(e)
|
|
|
|
def _event_runner(self):
|
|
"""
|
|
Process the event queue and execute handlers.
|
|
|
|
The number of event runner threads is controlled by HANDLER_THREADS.
|
|
|
|
Stream event handlers will all execute in this thread. Custom event
|
|
handlers may be spawned in individual threads.
|
|
"""
|
|
log.debug("Loading event runner")
|
|
try:
|
|
while not self.stop.isSet():
|
|
try:
|
|
event = self.event_queue.get(True, timeout=5)
|
|
except queue.Empty:
|
|
event = None
|
|
if event is None:
|
|
continue
|
|
|
|
etype, handler = event[0:2]
|
|
args = event[2:]
|
|
|
|
if etype == 'stanza':
|
|
try:
|
|
handler.run(args[0])
|
|
except Exception as e:
|
|
error_msg = 'Error processing stream handler: %s'
|
|
log.exception(error_msg % handler.name)
|
|
args[0].exception(e)
|
|
elif etype == 'schedule':
|
|
try:
|
|
log.debug(args)
|
|
handler(*args[0])
|
|
except:
|
|
log.exception('Error processing scheduled task')
|
|
elif etype == 'event':
|
|
func, threaded, disposable = handler
|
|
try:
|
|
if threaded:
|
|
x = threading.Thread(
|
|
name="Event_%s" % str(func),
|
|
target=self._threaded_event_wrapper,
|
|
args=(func, args))
|
|
x.start()
|
|
else:
|
|
func(*args)
|
|
except Exception as e:
|
|
error_msg = 'Error processing event handler: %s'
|
|
log.exception(error_msg % str(func))
|
|
if hasattr(args[0], 'exception'):
|
|
args[0].exception(e)
|
|
elif etype == 'quit':
|
|
log.debug("Quitting event runner thread")
|
|
return False
|
|
except KeyboardInterrupt:
|
|
log.debug("Keyboard Escape Detected in _event_runner")
|
|
self.disconnect()
|
|
return
|
|
except SystemExit:
|
|
self.disconnect()
|
|
self.event_queue.put(('quit', None, None))
|
|
return
|
|
|
|
def _send_thread(self):
|
|
"""
|
|
Extract stanzas from the send queue and send them on the stream.
|
|
"""
|
|
try:
|
|
while not self.stop.isSet():
|
|
try:
|
|
data = self.send_queue.get(True, 1)
|
|
except queue.Empty:
|
|
continue
|
|
log.debug("SEND: %s" % data)
|
|
try:
|
|
self.socket.send(data.encode('utf-8'))
|
|
except:
|
|
log.warning("Failed to send %s" % data)
|
|
self.disconnect(self.auto_reconnect)
|
|
except KeyboardInterrupt:
|
|
log.debug("Keyboard Escape Detected in _send_thread")
|
|
self.disconnect()
|
|
return
|
|
except SystemExit:
|
|
self.disconnect()
|
|
self.event_queue.put(('quit', None, None))
|
|
return
|