def pull_profile_from_node(node_id):
"""Pull the user profile from the given node id
Only update the user if data has changed."""
print "pull_profile_from_node %d" % node_id
save = False # Flag to save user
node = None
try:
node = Node.objects.get(pk=node_id)
except Node.DoesNotExist:
# TODO: ERROR LOG FILE
print "Node does not exist!!!"
return
user = None
try:
user = User.objects.get(node=node)
except User.DoesNotExist:
print "We don't have a user for the node..."
user = User() # We may not yet have a user for the node (rare)
save = True
# Perform communications
message = SylphMessage(node.uri)
message.set_post('dispatch', 'user_pull')
response = send(message)
if response.has_errors():
print "No communication return data!!" # TODO: Error log
node.just_failed(save=True)
return
try:
user_data = response.extract('User')
if not user_data or len(user_data) != 1:
raise Exception, "Error with data"
user_data = user_data[0]
except Exception:
print "No user data, or error. Ignoring."
node.just_failed(save=True)
return
node.just_pulled_from(save=True)
for k, v in user_data.iteritems():
chk = getattr(user, k)
if v == chk:
continue
if k == 'node':
if v == node.pk:
continue
# XXX: The following could be used to hijack other users
user.node = node # TODO: This isn't correct.
save = True
continue
save = True
setattr(user, k, v) # TODO: Might not work for 'uri' or 'node'
if save:
user.save()
def push_profile_to_node(node_uri):
"""Send an updated copy of our profile to a specified node."""
print "push_profile_to_node %s" % node_uri
node_uri = hashless(node_uri)
node = None
user = None
try:
user = User.objects.get(pk=settings.OUR_USER_PK)
node = Node.objects.get(uri=node_uri)
except User.DoesNotExist:
raise Exception, "The main user MUST exist!"
except Node.DoesNotExist:
raise Exception, "The node requested does not exist."
# TODO: Granularized Privacy
message = SylphMessage(node_uri)
message.set_post('dispatch', 'user_push')
message.add(user)
response = send(message)
if not response.has_errors():
node.just_failed(save=True)
print "User profile push failed." # TODO: Error log
return
node.just_pushed_to(save=True)
def do_add_node_lookup(uri):
"""
Nodes will get added all the time and in various contexts.
This is the task that must run for each of them.
Query every single added node -- this MUST occur.
Remember, adding a node doesn't require permission. You can
navigate to a URI without permission (though you may be blocked)
The response may provide some additional details:
* Person (with varying amount of data)
* etc.
> Add them
> Maybe with an additional footnote? (TODO)
after done, set is_remaining_to_query or whatever = False
Pinging a node does not require us to give identity unless the
remote node requests it.
"""
node = None
try:
node = Node.objects.get(uri=uri)
except Node.DoesNotExist:
# TODO: ERROR LOG FILE
print "cannot do_add_node_lookup: Node does not exist!!!"
return
if node.node_class in ['webpage', 'service', 'feed']:
print "cannot do_add_node_lookup: non-sylph or unknown nodes"
return
if node.node_class_guess in ['webpage', 'service', 'feed']:
print "(TEMP) cannot do_add_node_lookup: non-sylph"
return
user = None
try:
user = User.objects.get(node=node)
except User.DoesNotExist:
user = User()
# Perform communications
message = SylphMessage(uri)
message.set_post('dispatch', 'ping')
response = send(message)
if response.has_errors():
print "No communication return data!!" # TODO: Error log
node.just_failed(save=True)
return
parser = None
node_data = None
try:
node_data = response.extract('Node')[0]
except Exception:
print "Error parsing payload" # TODO: Error log
node.just_failed(save=True)
return
user_data = None
try:
user_data = response.extract('User')[0]
except Exception:
print "1. No user data, or error. Ignoring."
# Update the node's status
node.is_yet_to_resolve = False
node.datetime_last_resolved = datetime.today()
node.status = 'AVAIL'
node.protocol_version = node_data['protocol_version']
node.software_name = node_data['software_name']
node.software_version = node_data['software_version']
node.node_class = 'sylph'
node.node_class_guess = ''
node.name = node_data['name']
node.description = node_data['description']
#node.datetime_edited = node_data['datetime_edited'] # TODO
node.save()
# Update the user's status, if we have user data.
if user_data:
user.username = user_data['username']
user.first_name = user_data['first_name']
user.middle_name = user_data['middle_name']
user.last_name = user_data['last_name']
user.bio = user_data['bio']
user.title = user_data['title']
user.suffix = user_data['suffix']
#user.datetime_created = user_data['datetime_created']
#user.datetime_edited = user_data['datetime_edited']
user.node = node
user.save()
# Now have the node add us
message = SylphMessage(uri)
post = {
'dispatch': 'node_ask_to_add',
'uri': settings.FULL_ENDPOINT_URI, # XXX XXX XXX: Very bad protocol!
}
message.set_post(post)
response = send(message)
if response.has_errors():
print "Failed to ask node to add us!!"
node.just_failed(save=True)
print "CREATING SUBSCRIPTIONS:"
create_subscriptions_to(node)
create_subscriptions_from(node)
def ping_node(id):
"""Ping a node that has already been added and succesfully resolved
in the past. This keeps info up to date."""
print "node.ping_node"
node = None
try:
node = Node.objects.get(pk=id)
except Node.DoesNotExist:
# TODO: Error logging facility (log to db)
print "Node does not exist!!!"
return
# XXX: Temporarily disabled
#user = None
#try:
# user = User.objects.get(node=node)
#except User.DoesNotExist:
# user = User()
# Perform communications
message = SylphMessage(node.uri)
message.set_post('dispatch', 'ping')
response = send(message)
if response.has_errors():
print "No communication return data!!" # TODO: Error log
node.just_failed(save=True)
return
node_data = None
try:
node_data = ret.extract('Node')
if not node_data or len(node_data) != 1:
raise Exception, "Error with data"
node_data = node_data[0]
except:
print "Error parsing RDF" # TODO: Error log
node.just_failed(save=True)
return
# XXX: Temporarily disabled
#try:
# user_data = ret.extract('User')
# if not user_data or len(user_data) != 1:
# raise Exception, "Error with data"
# user_data = user_data[0]
#except:
# pass
# Update the node's status
node.datetime_last_resolved = datetime.today()
node.status = 'AVAIL'
node.protocol_version = node_data['protocol_version']
node.software_name = node_data['software_name']
node.software_version = node_data['software_version']
node.node_class = 'sylph'
node.node_class_guess = ''
node.name = node_data['name']
node.description = node_data['description']
#node.datetime_edited = node_data['datetime_edited'] # TODO
node.save()
node.just_pulled_from(save=True)