def presenceChanged(self,user,comp_name,domain,status):
"""
Processs change of presence of user
It publshes items or pubsub node which should be persistent
Every item is published with id == username (jid without resource)
this means, that in case if update node will be atomaticaly
replaced with new value, no need to delete and recreate node
"""
def process_dns(dnsresult,userstats):
try:
hostname = str(dnsresult[0][0].payload.name)
except:
#DNS error happens, publish empty hostname
hostname = ""
username = userstats['username']
userstats['hostname'] = hostname
#make new item which would be published
#TODO: serializing and deserializing should take place in separate func
payload = domish.Element((None,"user"))
for k,v in userstats.items():
payload[k] = v
item = Item(id=username,payload=payload)
log.msg("Publishing presence of %s"%username)
self.pubsub_client.publish(JID("pubsub.%s"%self.domain),PUB_NODE,items=[item],sender=JID(self.name))
def process_newpresence(userstats,status):
"""
publish new payload
"""
userstats['status'] = status
username = userstats['username']
#build reverse ip name for DNS query
reverse_ip = '.'.join(userstats['ip'].split('.')[::-1])+'.in-addr.arpa.'
d = self.dns_client.lookupPointer(reverse_ip)
d.addBoth(process_dns,userstats)
#simply delete node if user offline, request details otherwise
if status == 'offline':
username = user.userhost()
request = PubSubRequestWithConf('retract')
request.recipient = JID(self.pubsub_name)
request.nodeIdentifier = PUB_NODE
request.sender = JID(self.name)
request.itemIdentifiers = [username]
log.msg("User %s goes offline, retracting published node"%username)
request.send(self.xmlstream)
else:
d = self.get_userstats(user,comp_name,domain)
d.addCallback(process_newpresence,status)
def configure_node(data):
request = PubSubRequestWithConf('configureSet')
request.recipient = JID(self.pubsub_name)
request.nodeIdentifier = PUB_NODE
request.sender = JID(self.name)
frm = Form('submit')
frm.addField( Field(fieldType='hidden',var='FORM_TYPE',value=NS_PUBSUB_NODE_CONFIG) )
frm.addField( Field(var='pubsub#title',value='Live presence events') )
frm.addField( Field(var='pubsub#persist_items',value='1') )
frm.addField( Field(var='pubsub#deliver_payloads',value='1') )
frm.addField( Field(var='pubsub#send_last_published_item',value='never') )
frm.addField( Field(var='pubsub#presence_based_delivery',value='0') )
frm.addField( Field(var='pubsub#access_model',value='open') )
frm.addField( Field(var='pubsub#node_type',value='leaf') )
frm.addField( Field(var='pubsub#max_items',value='100') )
request.configureForm = frm
request.send(self.xmlstream)
def initial_publish(self):
"""
purges currently published items on persistent node, then asks all users to send presence data again
"""
def process_online_users(items):
log.msg("Sending probe to all online users")
for user in items:
self.probe(user.entity,sender=JID(self.name))
self.available(user.entity,sender=JID(self.name))
#purge all published items under persistent node
#client to this node will be notified about node purge
request = PubSubRequestWithConf('purge')
request.recipient = JID(self.pubsub_name)
request.nodeIdentifier = PUB_NODE
request.sender = JID(self.name)
d = request.send(self.xmlstream)
log.msg("Requesting list of online users")
d = self.disco_client.requestItems(JID(self.domain),NODE_ONLINE_USERS, sender=JID(self.name))
d.addCallback(process_online_users)