diff options
Diffstat (limited to 'sleekxmpp/xmlstream/xmlstream.py')
| -rw-r--r-- | sleekxmpp/xmlstream/xmlstream.py | 234 |
1 files changed, 123 insertions, 111 deletions
diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py index 217367f9..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 @@ -54,7 +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)) @@ -101,30 +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,ca_certs=self.ca_certs) + 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" @@ -133,19 +136,19 @@ class XMLStream(object): "Handshakes for TLS" if self.ssl_support: logging.info("Negotiating TLS") - self.realsocket = self.socket +# 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) - print "doing handshake..." + ssl_version=ssl.PROTOCOL_TLSv1, + do_handshake_on_connect=False, + ca_certs=self.ca_certs) self.socket.do_handshake() - print "got 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.") @@ -154,6 +157,7 @@ class XMLStream(object): def process(self, threaded=True): self.scheduler.process(threaded=True) + self.run = True for t in range(0, HANDLER_THREADS): th = threading.Thread(name='eventhandle%s' % t, target=self._eventRunner) th.setDaemon(True) @@ -176,54 +180,54 @@ class XMLStream(object): 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 - self.scheduler.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" @@ -236,41 +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: - logging.debug("Ending readXML loop") - return False - if root: - root.clear() + self.__spawnEvent(xmlobj) + if root: root.clear() if event == b'start': edepth += 1 - logging.debug("Ending readXML loop") + 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) @@ -280,42 +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 - self.scheduler.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(self.server,self.port) - + 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 @@ -327,17 +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: @@ -345,34 +360,31 @@ class XMLStream(object): event = self.eventqueue.get(True, timeout=5) except queue.Empty: event = None - except KeyboardInterrupt: - self.run = False - self.scheduler.run = False if event is not None: 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 == 'schedule': + elif etype == 'sched': try: - logging.debug(args) - handler(*args[0]) + #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 @@ -458,4 +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.") |