diff options
Diffstat (limited to 'sleekxmpp/xmlstream')
| -rw-r--r-- | sleekxmpp/xmlstream/handler/base.py | 2 | ||||
| -rw-r--r-- | sleekxmpp/xmlstream/handler/callback.py | 4 | ||||
| -rw-r--r-- | sleekxmpp/xmlstream/scheduler.py | 87 | ||||
| -rw-r--r-- | sleekxmpp/xmlstream/stanzabase.py | 13 | ||||
| -rw-r--r-- | sleekxmpp/xmlstream/xmlstream.py | 244 |
5 files changed, 241 insertions, 109 deletions
diff --git a/sleekxmpp/xmlstream/handler/base.py b/sleekxmpp/xmlstream/handler/base.py index 5d55f4ee..a44edf0e 100644 --- a/sleekxmpp/xmlstream/handler/base.py +++ b/sleekxmpp/xmlstream/handler/base.py @@ -18,7 +18,7 @@ class BaseHandler(object): def match(self, xml): return self._matcher.match(xml) - def prerun(self, payload): + def prerun(self, payload): # what's the point of this if the payload is called again in run?? self._payload = payload def run(self, payload): diff --git a/sleekxmpp/xmlstream/handler/callback.py b/sleekxmpp/xmlstream/handler/callback.py index 49cfa14d..ea5acb5b 100644 --- a/sleekxmpp/xmlstream/handler/callback.py +++ b/sleekxmpp/xmlstream/handler/callback.py @@ -17,13 +17,15 @@ class Callback(base.BaseHandler): self._once = once self._instream = instream - def prerun(self, payload): + def prerun(self, payload): # prerun actually calls run?!? WTF! Then it gets run AGAIN! base.BaseHandler.prerun(self, payload) if self._instream: + logging.debug('callback "%s" prerun', self.name) self.run(payload, True) def run(self, payload, instream=False): if not self._instream or instream: + logging.debug('callback "%s" run', self.name) base.BaseHandler.run(self, payload) #if self._thread: # x = threading.Thread(name="Callback_%s" % self.name, target=self._pointer, args=(payload,)) diff --git a/sleekxmpp/xmlstream/scheduler.py b/sleekxmpp/xmlstream/scheduler.py new file mode 100644 index 00000000..945d9fad --- /dev/null +++ b/sleekxmpp/xmlstream/scheduler.py @@ -0,0 +1,87 @@ +try: + import queue +except ImportError: + import Queue as queue +import time +import threading +import logging + +class Task(object): + """Task object for the Scheduler class""" + def __init__(self, name, seconds, callback, args=None, kwargs=None, repeat=False, qpointer=None): + self.name = name + self.seconds = seconds + self.callback = callback + self.args = args or tuple() + self.kwargs = kwargs or {} + self.repeat = repeat + self.next = time.time() + self.seconds + self.qpointer = qpointer + + def run(self): + if self.qpointer is not None: + self.qpointer.put(('schedule', self.callback, self.args)) + else: + self.callback(*self.args, **self.kwargs) + self.reset() + return self.repeat + + def reset(self): + self.next = time.time() + self.seconds + +class Scheduler(object): + """Threaded scheduler that allows for updates mid-execution unlike http://docs.python.org/library/sched.html#module-sched""" + def __init__(self, parentqueue=None): + self.addq = queue.Queue() + self.schedule = [] + self.thread = None + self.run = False + self.parentqueue = parentqueue + + def process(self, threaded=True): + if threaded: + self.thread = threading.Thread(name='shedulerprocess', target=self._process) + self.thread.start() + else: + self._process() + + def _process(self): + self.run = True + while self.run: + try: + wait = 1 + updated = False + if self.schedule: + wait = self.schedule[0].next - time.time() + try: + if wait <= 0.0: + newtask = self.addq.get(False) + else: + newtask = self.addq.get(True, wait) + except queue.Empty: + cleanup = [] + for task in self.schedule: + if time.time() >= task.next: + updated = True + if not task.run(): + cleanup.append(task) + else: + break + for task in cleanup: + x = self.schedule.pop(self.schedule.index(task)) + else: + updated = True + self.schedule.append(newtask) + finally: + if updated: self.schedule = sorted(self.schedule, key=lambda task: task.next) + except KeyboardInterrupt: + self.run = False + logging.debug("Qutting Scheduler thread") + if self.parentqueue is not None: + self.parentqueue.put(('quit', None, None)) + + def add(self, name, seconds, callback, args=None, kwargs=None, repeat=False, qpointer=None): + self.addq.put(Task(name, seconds, callback, args, kwargs, repeat, qpointer)) + + def quit(self): + self.run = False diff --git a/sleekxmpp/xmlstream/stanzabase.py b/sleekxmpp/xmlstream/stanzabase.py index 018e81c3..64020c8f 100644 --- a/sleekxmpp/xmlstream/stanzabase.py +++ b/sleekxmpp/xmlstream/stanzabase.py @@ -78,6 +78,9 @@ class ElementBase(tostring.ToString): def __iter__(self): self.idx = 0 return self + + def __bool__(self): + return True def __next__(self): self.idx += 1 @@ -319,6 +322,8 @@ class StanzaBase(ElementBase): def __init__(self, stream=None, xml=None, stype=None, sto=None, sfrom=None, sid=None): self.stream = stream + if stream is not None: + self.namespace = stream.default_ns ElementBase.__init__(self, xml) if stype is not None: self['type'] = stype @@ -326,13 +331,11 @@ class StanzaBase(ElementBase): self['to'] = sto if sfrom is not None: self['from'] = sfrom - if stream is not None: - self.namespace = stream.default_ns self.tag = "{%s}%s" % (self.namespace, self.name) def setType(self, value): if value in self.types: - self.xml.attrib['type'] = value + self.xml.attrib['type'] = value return self def getPayload(self): @@ -340,15 +343,18 @@ class StanzaBase(ElementBase): def setPayload(self, value): self.xml.append(value) + return self def delPayload(self): self.clear() + return self def clear(self): for child in self.xml.getchildren(): self.xml.remove(child) for plugin in list(self.plugins.keys()): del self.plugins[plugin] + return self def reply(self): self['from'], self['to'] = self['to'], self['from'] @@ -357,6 +363,7 @@ class StanzaBase(ElementBase): def error(self): self['type'] = 'error' + return self def getTo(self): return JID(self._getAttr('to')) diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py index 13a87a63..fd307a5c 100644 --- a/sleekxmpp/xmlstream/xmlstream.py +++ b/sleekxmpp/xmlstream/xmlstream.py @@ -1,9 +1,9 @@ """ - SleekXMPP: The Sleek XMPP Library - Copyright (C) 2010 Nathanael C. Fritz - This file is part of SleekXMPP. + SleekXMPP: The Sleek XMPP Library + Copyright (C) 2010 Nathanael C. Fritz + This file is part of SleekXMPP. - See the file license.txt for copying permission. + See the file license.txt for copying permission. """ from __future__ import with_statement, unicode_literals @@ -22,6 +22,7 @@ import time import traceback import types import xml.sax.saxutils +from . import scheduler HANDLER_THREADS = 1 @@ -53,7 +54,7 @@ class XMLStream(object): self.ssl_support = ssl_support self.escape_quotes = escape_quotes self.state = statemachine.StateMachine() - self.state.addStates({'connected':False, 'is client':False, 'ssl':False, 'tls':False, 'reconnect':True, 'processing':False, 'disconnecting':False}) #set initial states + self.state.addStates({'connected':False, 'is client':False, 'ssl':False, 'tls':False, 'reconnect':True, 'processing':False}) #set initial states self.setSocket(socket) self.address = (host, int(port)) @@ -69,12 +70,14 @@ class XMLStream(object): self.filesocket = None self.use_ssl = False self.use_tls = False + self.ca_certs=None self.stream_header = "<stream>" self.stream_footer = "</stream>" self.eventqueue = queue.Queue() self.sendqueue = queue.Queue() + self.scheduler = scheduler.Scheduler(self.eventqueue) self.namespace_map = {} @@ -98,30 +101,33 @@ class XMLStream(object): def connectTCP(self, host='', port=0, use_ssl=None, use_tls=None, reattempt=True): "Connect and create socket" while reattempt and not self.state['connected']: - if host and port: - self.address = (host, int(port)) - if use_ssl is not None: - self.use_ssl = use_ssl - if use_tls is not None: - self.use_tls = use_tls - self.state.set('is client', True) - if sys.version_info < (3, 0): - self.socket = filesocket.Socket26(socket.AF_INET, socket.SOCK_STREAM) - else: - self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) - self.socket.settimeout(None) - if self.use_ssl and self.ssl_support: - logging.debug("Socket Wrapped for SSL") - self.socket = ssl.wrap_socket(self.socket) + logging.debug('connecting....') + try: + if host and port: + self.address = (host, int(port)) + if use_ssl is not None: + self.use_ssl = use_ssl + if use_tls is not None: + self.use_tls = use_tls + if sys.version_info < (3, 0): + self.socket = filesocket.Socket26(socket.AF_INET, socket.SOCK_STREAM) + else: + self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) + self.socket.settimeout(None) #10) + if self.use_ssl and self.ssl_support: + logging.debug("Socket Wrapped for SSL") + self.socket = ssl.wrap_socket(self.socket,ca_certs=self.ca_certs) + except: + logging.exception("Connection error") try: self.socket.connect(self.address) - #self.filesocket = self.socket.makefile('rb', 0) self.filesocket = self.socket.makefile('rb', 0) self.state.set('connected', True) + logging.debug('connect complete.') return True except socket.error as serr: logging.error("Could not connect. Socket Error #%s: %s" % (serr.errno, serr.strerror)) - time.sleep(1) + time.sleep(1) # TODO proper quiesce if connection attempt fails def connectUnix(self, filepath): "Connect to Unix file and create socket" @@ -130,14 +136,19 @@ class XMLStream(object): "Handshakes for TLS" if self.ssl_support: logging.info("Negotiating TLS") - self.realsocket = self.socket - self.socket = ssl.wrap_socket(self.socket, ssl_version=ssl.PROTOCOL_TLSv1, do_handshake_on_connect=False) +# self.realsocket = self.socket # NOT USED + self.socket = ssl.wrap_socket(self.socket, + ssl_version=ssl.PROTOCOL_TLSv1, + do_handshake_on_connect=False, + ca_certs=self.ca_certs) self.socket.do_handshake() if sys.version_info < (3,0): from . filesocket import filesocket self.filesocket = filesocket(self.socket) else: self.filesocket = self.socket.makefile('rb', 0) + + logging.debug("TLS negotitation successful") return True else: logging.warning("Tried to enable TLS, but ssl module not found.") @@ -145,69 +156,78 @@ class XMLStream(object): raise RestartStream() def process(self, threaded=True): + self.scheduler.process(threaded=True) + self.run = True for t in range(0, HANDLER_THREADS): - self.__thread['eventhandle%s' % t] = threading.Thread(name='eventhandle%s' % t, target=self._eventRunner) - self.__thread['eventhandle%s' % t].start() - self.__thread['sendthread'] = threading.Thread(name='sendthread', target=self._sendThread) - self.__thread['sendthread'].start() + th = threading.Thread(name='eventhandle%s' % t, target=self._eventRunner) + th.setDaemon(True) + self.__thread['eventhandle%s' % t] = th + th.start() + th = threading.Thread(name='sendthread', target=self._sendThread) + th.setDaemon(True) + self.__thread['sendthread'] = th + th.start() if threaded: - self.__thread['process'] = threading.Thread(name='process', target=self._process) - self.__thread['process'].start() + th = threading.Thread(name='process', target=self._process) + th.setDaemon(True) + self.__thread['process'] = th + th.start() else: self._process() - def schedule(self, seconds, handler, args=None): - threading.Timer(seconds, handler, args).start() + def schedule(self, name, seconds, callback, args=None, kwargs=None, repeat=False): + self.scheduler.add(name, seconds, callback, args, kwargs, repeat, qpointer=self.eventqueue) def _process(self): "Start processing the socket." - firstrun = True - while self.run and (firstrun or self.state['reconnect']): + logging.debug('Process thread starting...') + while self.run: self.state.set('processing', True) - firstrun = False try: - if self.state['is client']: - self.sendRaw(self.stream_header) - while self.run and self.__readXML(): - if self.state['is client']: - self.sendRaw(self.stream_header) + self.sendRaw(self.stream_header) + while self.run and self.__readXML(): pass + except socket.timeout: + logging.debug('socket rcv timeout') + pass + except CloseStream: + # TODO warn that the listener thread is exiting!!! + pass + except RestartStream: + logging.debug("Restarting stream...") + continue # DON'T re-initialize the stream -- this exception is sent + # specifically when we've initialized TLS and need to re-send the <stream> header. except KeyboardInterrupt: logging.debug("Keyboard Escape Detected") self.state.set('processing', False) self.state.set('reconnect', False) self.disconnect() - self.run = False + # TODO this is probably not necessary... self.eventqueue.put(('quit', None, None)) return - except CloseStream: - return except SystemExit: + # TODO shouldn't this be the same as KeyboardInterrupt???? self.eventqueue.put(('quit', None, None)) return - except socket.error: - if not self.state.reconnect: - return - else: - self.state.set('processing', False) - traceback.print_exc() - self.disconnect(reconnect=True) except: + logging.exception('Unexpected error in RCV thread') if not self.state.reconnect: return else: + logging.debug('reconnecting...') self.state.set('processing', False) - traceback.print_exc() self.disconnect(reconnect=True) - if self.state['reconnect']: - self.state.set('connected', False) - self.state.set('processing', False) - self.reconnect() - else: - self.eventqueue.put(('quit', None, None)) - #self.__thread['readXML'] = threading.Thread(name='readXML', target=self.__readXML) - #self.__thread['readXML'].start() - #self.__thread['spawnEvents'] = threading.Thread(name='spawnEvents', target=self.__spawnEvents) - #self.__thread['spawnEvents'].start() + # TODO the individual exception handlers above already handle reconnect! + # Why are we attempting to do it again down here??? +# if self.state['reconnect']: +# self.state.set('connected', False) + self.state.set('processing', False) +# self.reconnect() +# else: +# TODO I think this is getting queued, and when the eventRunner comes back online after +# reconnect, it immediately processes a 'quit' event and exits again, meanwhile the +# rest of the client is just starting to connect and process the incoming event stream!!! +# self.eventqueue.put(('quit', None, None)) + logging.debug('Quitting Process thread') def __readXML(self): "Parses the incoming stream, adding to xmlin queue as it goes" @@ -220,38 +240,50 @@ class XMLStream(object): if edepth == 0: # and xmlobj.tag.split('}', 1)[-1] == self.basetag: if event == b'start': root = xmlobj + logging.debug('handling start stream') self.start_stream_handler(root) if event == b'end': edepth += -1 if edepth == 0 and event == b'end': - self.disconnect(reconnect=self.state['reconnect']) + # what is this case exactly? Premature EOF? + #self.disconnect(reconnect=self.state['reconnect']) + logging.debug("Ending readXML loop") return False elif edepth == 1: #self.xmlin.put(xmlobj) - try: - self.__spawnEvent(xmlobj) - except RestartStream: - return True - except CloseStream: - return False - if root: - root.clear() + self.__spawnEvent(xmlobj) + if root: root.clear() if event == b'start': edepth += 1 + logging.debug("Exiting readXML loop") + return False def _sendThread(self): + logging.debug('send thread starting...') while self.run: - data = self.sendqueue.get(True) - logging.debug("SEND: %s" % data) + if not self.state['connected']: + logging.warning("Not connected yet...") + time.sleep(1) + data = None try: - self.socket.send(data.encode('utf-8')) - #self.socket.send(bytes(data, "utf-8")) - #except socket.error,(errno, strerror): + data = self.sendqueue.get(True,10) + logging.debug("SEND: %s" % data) + self.socket.sendall(data.encode('utf-8')) + except queue.Empty: + logging.debug('nothing on send queue') + except socket.timeout: + # this is to prevent hanging + logging.debug('timeout sending packet data') except: logging.warning("Failed to send %s" % data) - self.state.set('connected', False) + logging.exception("Socket error in SEND thread") + # TODO it's somewhat unsafe for the sender thread to assume it can just + # re-intitialize the connection, since the receiver thread could be doing + # the same thing concurrently. Oops! The safer option would be to throw + # some sort of event that could be handled by a common thread or the reader + # thread to perform reconnect and then re-initialize the handler threads as well. if self.state.reconnect: - logging.error("Disconnected. Socket Error.") + logging.debug('Reconnecting...') traceback.print_exc() self.disconnect(reconnect=True) @@ -261,41 +293,40 @@ class XMLStream(object): def disconnect(self, reconnect=False): self.state.set('reconnect', reconnect) - if self.state['disconnecting']: + if not self.state['connected']: + logging.warning("Already disconnected.") return - if not self.state['reconnect']: - logging.debug("Disconnecting...") - self.state.set('disconnecting', True) - self.run = False - if self.state['connected']: - self.sendRaw(self.stream_footer) - time.sleep(1) - #send end of stream - #wait for end of stream back + logging.debug("Disconnecting...") + self.sendRaw(self.stream_footer) + time.sleep(5) + #send end of stream + #wait for end of stream back + self.run = False + self.scheduler.run = False try: + self.state.set('connected',False) +# self.socket.shutdown(socket.SHUT_RDWR) self.socket.close() + except socket.error as (errno,strerror): + logging.exception("Error while disconnecting. Socket Error #%s: %s" % (errno, strerror)) + try: self.filesocket.close() - self.socket.shutdown(socket.SHUT_RDWR) - except socket.error as serr: - #logging.warning("Error while disconnecting. Socket Error #%s: %s" % (errno, strerror)) - #thread.exit_thread() - pass - if self.state['processing']: - #raise CloseStream - pass + except socket.error as (errno,strerror): + logging.exception("Error closing filesocket.") def reconnect(self): self.state.set('tls',False) self.state.set('ssl',False) time.sleep(1) self.connect() - + def incoming_filter(self, xmlobj): return xmlobj - + def __spawnEvent(self, xmlobj): "watching xmlOut and processes handlers" #convert XML into Stanza + # TODO surround this log statement with an if, it's expensive logging.debug("RECV: %s" % cElementTree.tostring(xmlobj)) xmlobj = self.incoming_filter(xmlobj) stanza = None @@ -307,17 +338,21 @@ class XMLStream(object): if stanza is None: stanza = StanzaBase(self, xmlobj) unhandled = True + # TODO inefficient linear search; performance might be improved by hashtable lookup for handler in self.__handlers: if handler.match(stanza): + logging.debug('matched stanza to handler %s', handler.name) handler.prerun(stanza) self.eventqueue.put(('stanza', handler, stanza)) - if handler.checkDelete(): self.__handlers.pop(self.__handlers.index(handler)) + if handler.checkDelete(): + logging.debug('deleting callback %s', handler.name) + self.__handlers.pop(self.__handlers.index(handler)) unhandled = False if unhandled: stanza.unhandled() #loop through handlers and test match #spawn threads as necessary, call handlers, sending Stanza - + def _eventRunner(self): logging.debug("Loading event runner") while self.run: @@ -329,26 +364,27 @@ class XMLStream(object): etype = event[0] handler = event[1] args = event[2:] - #etype, handler, *args = event #python 3.x way + #etype, handler, *args = event #python 3.x way if etype == 'stanza': try: handler.run(args[0]) except Exception as e: - traceback.print_exc() + logging.exception("Exception in event handler") args[0].exception(e) elif etype == 'sched': try: + #handler(*args[0]) handler.run(*args) except: logging.error(traceback.format_exc()) elif etype == 'quit': logging.debug("Quitting eventRunner thread") return False - + def registerHandler(self, handler, before=None, after=None): "Add handler with matcher class and parameters." self.__handlers.append(handler) - + def removeHandler(self, name): "Removes the handler." idx = 0 @@ -434,4 +470,4 @@ class XMLStream(object): def start_stream_handler(self, xml): """Meant to be overridden""" - pass + logging.warn("No start stream handler has been implemented.") |