Mercurial > libervia-backend
view sat/core/patches.py @ 2845:42380a4f6433
quick frontend (app): new synchronisation mechanism:
on some frontend (notably on mobiles) frontend can be paused and lose synchronisation with backend, this can also happen if backend restart a connexion without resuming using stream management. To manage that, QuickApp now has a sync attribute which is True when the backend is in sync with frontend.
When synchronisation has been lost and is possible again, all widget will have their "resync" method called, which can be used to do necessary calls to update the status.
It's the responsability of each widget to then reset the "sync" attribute, once everything has been resynchronised.
author | Goffi <goffi@goffi.org> |
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date | Sat, 09 Mar 2019 16:33:31 +0100 |
parents | 00d905e1b0ef |
children | ab2696e34d29 |
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import copy from twisted.words.protocols.jabber import xmlstream, sasl, client as tclient, jid from twisted.internet import ssl from wokkel import client from sat.core.constants import Const as C from sat.core.log import getLogger log = getLogger(__name__) """This module apply monkey patches to Twisted and Wokkel First part handle certificate validation during XMPP connectionand are temporary (until merged upstream). Second part add a trigger point to send and onElement method of XmlStream """ ## certificate validation patches class TLSInitiatingInitializer(xmlstream.TLSInitiatingInitializer): check_certificate = True def onProceed(self, obj): self.xmlstream.removeObserver('/failure', self.onFailure) trustRoot = ssl.platformTrust() if self.check_certificate else None ctx = ssl.CertificateOptions(trustRoot=trustRoot) self.xmlstream.transport.startTLS(ctx) self.xmlstream.reset() self.xmlstream.sendHeader() self._deferred.callback(xmlstream.Reset) class XMPPClient(client.XMPPClient): def __init__(self, jid, password, host=None, port=5222, check_certificate=True): self.jid = jid self.domain = jid.host.encode('idna') self.host = host self.port = port factory = HybridClientFactory( jid, password, check_certificate=check_certificate) client.StreamManager.__init__(self, factory) def HybridClientFactory(jid, password, check_certificate=True): a = HybridAuthenticator(jid, password, check_certificate) return xmlstream.XmlStreamFactory(a) class HybridAuthenticator(client.HybridAuthenticator): res_binding = True def __init__(self, jid, password, check_certificate): xmlstream.ConnectAuthenticator.__init__(self, jid.host) self.jid = jid self.password = password self.check_certificate = check_certificate def associateWithStream(self, xs): xmlstream.ConnectAuthenticator.associateWithStream(self, xs) tlsInit = xmlstream.TLSInitiatingInitializer(xs) tlsInit.check_certificate = self.check_certificate xs.initializers = [client.client.CheckVersionInitializer(xs), tlsInit, CheckAuthInitializer(xs, self.res_binding)] # XmlStream triggers class XmlStream(xmlstream.XmlStream): """XmlStream which allows to add hooks""" def __init__(self, authenticator): xmlstream.XmlStream.__init__(self, authenticator) # hooks at this level should not modify content # so it's not needed to handle priority as with triggers self._onElementHooks = [] self._sendHooks = [] def addHook(self, hook_type, callback): """Add a send or receive hook""" conflict_msg = (u"Hook conflict: can't add {hook_type} hook {callback}" .format(hook_type=hook_type, callback=callback)) if hook_type == C.STREAM_HOOK_RECEIVE: if callback not in self._onElementHooks: self._onElementHooks.append(callback) else: log.warning(conflict_msg) elif hook_type == C.STREAM_HOOK_SEND: if callback not in self._sendHooks: self._sendHooks.append(callback) else: log.warning(conflict_msg) else: raise ValueError(u"Invalid hook type: {hook_type}" .format(hook_type=hook_type)) def onElement(self, element): for hook in self._onElementHooks: hook(element) xmlstream.XmlStream.onElement(self, element) def send(self, obj): for hook in self._sendHooks: hook(obj) xmlstream.XmlStream.send(self, obj) # Binding activation (needed for stream management, XEP-0198) class CheckAuthInitializer(client.CheckAuthInitializer): def __init__(self, xs, res_binding): super(CheckAuthInitializer, self).__init__(xs) self.res_binding = res_binding def initialize(self): # XXX: modification of client.CheckAuthInitializer which has optional # resource binding, and which doesn't do deprecated # SessionInitializer if (sasl.NS_XMPP_SASL, 'mechanisms') in self.xmlstream.features: inits = [(sasl.SASLInitiatingInitializer, True)] if self.res_binding: inits.append((tclient.BindInitializer, True)), for initClass, required in inits: init = initClass(self.xmlstream) init.required = required self.xmlstream.initializers.append(init) elif (tclient.NS_IQ_AUTH_FEATURE, 'auth') in self.xmlstream.features: self.xmlstream.initializers.append( tclient.IQAuthInitializer(self.xmlstream)) else: raise Exception("No available authentication method found") # jid fix def internJID(jidstring): """ Return interned JID. @rtype: L{JID} """ # XXX: this interJID return a copy of the cached jid # this avoid modification of cached jid as JID is mutable # TODO: propose this upstream if jidstring in jid.__internJIDs: return copy.copy(jid.__internJIDs[jidstring]) else: j = jid.JID(jidstring) jid.__internJIDs[jidstring] = j return copy.copy(j) def apply(): # certificate validation xmlstream.TLSInitiatingInitializer = TLSInitiatingInitializer client.XMPPClient = XMPPClient # XmlStream triggers xmlstream.XmlStreamFactory.protocol = XmlStream # jid fix jid.internJID = internJID