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# Copyright (C) 2020 Philipp Hörist <philipp AT hoerist.com>
#
# This file is part of nbxmpp.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <http://www.gnu.org/licenses/>.
from collections import namedtuple
from nbxmpp.task import iq_request_task
from nbxmpp.errors import is_error
from nbxmpp.errors import PubSubStanzaError
from nbxmpp.errors import MalformedStanzaError
from nbxmpp.structs import StanzaHandler
from nbxmpp.structs import PubSubEventData
from nbxmpp.structs import CommonResult
from nbxmpp.protocol import Iq
from nbxmpp.protocol import Node
from nbxmpp.namespaces import Namespace
from nbxmpp.modules.base import BaseModule
from nbxmpp.modules.util import process_response
from nbxmpp.modules.util import raise_if_error
from nbxmpp.modules.util import finalize
from nbxmpp.modules.dataforms import extend_form
class PubSub(BaseModule):
def __init__(self, client):
BaseModule.__init__(self, client)
self._client = client
self.handlers = [
StanzaHandler(name='message',
callback=self._process_pubsub_base,
ns=Namespace.PUBSUB_EVENT,
priority=15),
]
def _process_pubsub_base(self, _client, stanza, properties):
properties.pubsub = True
event = stanza.getTag('event', namespace=Namespace.PUBSUB_EVENT)
delete = event.getTag('delete')
if delete is not None:
node = delete.getAttr('node')
properties.pubsub_event = PubSubEventData(
node, deleted=True)
return
purge = event.getTag('purge')
if purge is not None:
node = purge.getAttr('node')
properties.pubsub_event = PubSubEventData(node, purged=True)
return
items = event.getTag('items')
if items is not None:
node = items.getAttr('node')
retract = items.getTag('retract')
if retract is not None:
id_ = retract.getAttr('id')
properties.pubsub_event = PubSubEventData(
node, id_, retracted=True)
return
if len(items.getChildren()) != 1:
self._log.warning('PubSub event with != 1 item')
self._log.warning(stanza)
return
item = items.getTag('item')
if item is None:
self._log.warning('No item node found')
self._log.warning(stanza)
return
id_ = item.getAttr('id')
properties.pubsub_event = PubSubEventData(node, id_, item)
@iq_request_task
def request_item(self, node, id_, jid=None):
task = yield
response = yield _make_pubsub_request(node, id_=id_, jid=jid)
if response.isError():
raise PubSubStanzaError(response)
item = _get_pubsub_item(response, node, id_)
yield task.set_result(item)
@iq_request_task
def request_items(self, node, max_items=None, jid=None):
_task = yield
response = yield _make_pubsub_request(node,
max_items=max_items,
jid=jid)
if response.isError():
raise PubSubStanzaError(response)
yield _get_pubsub_items(response, node)
@iq_request_task
def publish(self,
node,
item,
id_=None,
options=None,
jid=None,
force_node_options=False):
_task = yield
request = _make_publish_request(node, item, id_, options, jid)
response = yield request
if response.isError():
error = PubSubStanzaError(response)
if (not force_node_options or
error.app_condition != 'precondition-not-met'):
raise error
result = yield self.reconfigure_node(node, options, jid)
if is_error(result):
raise result
response = yield request
if response.isError():
raise PubSubStanzaError(response)
jid = response.getFrom()
item_id = _get_published_item_id(response, node, id_)
yield PubSubPublishResult(jid, node, item_id)
@iq_request_task
def get_access_model(self, node):
_task = yield
result = yield self.get_node_configuration(node)
raise_if_error(result)
yield result.form['pubsub#access_model'].value
@iq_request_task
def set_access_model(self, node, model):
task = yield
if model not in ('open', 'presence'):
raise ValueError('Invalid access model')
result = yield self.get_node_configuration(node)
raise_if_error(result)
try:
access_model = result.form['pubsub#access_model'].value
except Exception:
yield task.set_error('warning',
condition='access-model-not-supported')
if access_model == model:
jid = self._client.get_bound_jid().new_as_bare()
yield CommonResult(jid=jid)
result.form['pubsub#access_model'].value = model
result = yield self.set_node_configuration(node, result.form)
yield finalize(task, result)
@iq_request_task
def retract(self, node, id_, jid=None, notify=True):
_task = yield
response = yield _make_retract_request(node, id_, jid, notify)
yield process_response(response)
@iq_request_task
def purge(self, node, jid=None):
_task = yield
response = yield _make_purge_request(node, jid)
yield process_response(response)
@iq_request_task
def delete(self, node, jid=None):
_task = yield
response = yield _make_delete_request(node, jid)
yield process_response(response)
@iq_request_task
def reconfigure_node(self, node, options, jid=None):
_task = yield
result = yield self.get_node_configuration(node, jid)
if is_error(result):
raise result
_apply_options(result.form, options)
result = yield self.set_node_configuration(node, result.form, jid)
yield result
@iq_request_task
def set_node_configuration(self, node, form, jid=None):
_task = yield
response = yield _make_node_configuration(node, form, jid)
yield process_response(response)
@iq_request_task
def get_node_configuration(self, node, jid=None):
_task = yield
response = yield _make_node_configuration_request(node, jid)
if response.isError():
raise PubSubStanzaError(response)
jid = response.getFrom()
form = _get_configure_form(response, node)
yield PubSubNodeConfigurationResult(jid=jid, node=node, form=form)
def get_pubsub_request(jid, node, id_=None, max_items=None):
query = Iq('get', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB)
items = pubsub.addChild('items', {'node': node})
if max_items is not None:
items.setAttr('max_items', max_items)
if id_ is not None:
items.addChild('item', {'id': id_})
return query
def get_pubsub_item(stanza):
pubsub_node = stanza.getTag('pubsub')
items_node = pubsub_node.getTag('items')
return items_node.getTag('item')
def get_pubsub_items(stanza, node=None):
pubsub_node = stanza.getTag('pubsub')
items_node = pubsub_node.getTag('items')
if node is not None and items_node.getAttr('node') != node:
return None
if items_node is not None:
return items_node.getTags('item')
return None
def get_publish_options(config):
options = Node(Namespace.DATA + ' x', attrs={'type': 'submit'})
field = options.addChild('field',
attrs={'var': 'FORM_TYPE', 'type': 'hidden'})
field.setTagData('value', Namespace.PUBSUB_PUBLISH_OPTIONS)
for var, value in config.items():
field = options.addChild('field', attrs={'var': var})
field.setTagData('value', value)
return options
def _get_pubsub_items(response, node):
pubsub_node = response.getTag('pubsub', namespace=Namespace.PUBSUB)
if pubsub_node is None:
raise MalformedStanzaError('pubsub node missing', response)
items_node = pubsub_node.getTag('items')
if items_node is None:
raise MalformedStanzaError('items node missing', response)
if items_node.getAttr('node') != node:
raise MalformedStanzaError('invalid node attr', response)
return items_node.getTags('item')
def _get_pubsub_item(response, node, id_):
items = _get_pubsub_items(response, node)
if len(items) > 1:
raise MalformedStanzaError('multiple items found', response)
if not items:
return None
item = items[0]
if item.getAttr('id') != id_:
raise MalformedStanzaError('invalid item id', response)
return item
def _make_pubsub_request(node, id_=None, max_items=None, jid=None):
query = Iq('get', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB)
items = pubsub.addChild('items', {'node': node})
if max_items is not None:
items.setAttr('max_items', max_items)
if id_ is not None:
items.addChild('item', {'id': id_})
return query
def _get_configure_form(response, node):
pubsub = response.getTag('pubsub', namespace=Namespace.PUBSUB_OWNER)
if pubsub is None:
raise MalformedStanzaError('pubsub node missing', response)
configure = pubsub.getTag('configure')
if configure is None:
raise MalformedStanzaError('configure node missing', response)
if node != configure.getAttr('node'):
raise MalformedStanzaError('invalid node attribute', response)
forms = configure.getTags('x', namespace=Namespace.DATA)
for form in forms:
dataform = extend_form(node=form)
form_type = dataform.vars.get('FORM_TYPE')
if form_type is None or form_type.value != Namespace.PUBSUB_CONFIG:
continue
return dataform
raise MalformedStanzaError('no valid form type found', response)
def _get_published_item_id(response, node, id_):
pubsub = response.getTag('pubsub', namespace=Namespace.PUBSUB)
if pubsub is None:
# https://xmpp.org/extensions/xep-0060.html#publisher-publish-success
# If the publish request did not include an ItemID,
# the IQ-result SHOULD include an empty <item/> element
# that specifies the ItemID of the published item.
#
# If the server did not add a payload we assume the item was
# published with the id we requested
return id_
publish = pubsub.getTag('publish')
if publish is None:
raise MalformedStanzaError('publish node missing', response)
if node != publish.getAttr('node'):
raise MalformedStanzaError('invalid node attribute', response)
item = publish.getTag('item')
if item is None:
raise MalformedStanzaError('item node missing', response)
item_id = item.getAttr('id')
if id_ is not None and item_id != id_:
raise MalformedStanzaError('invalid item id', response)
return item_id
def _make_publish_request(node, item, id_, options, jid):
query = Iq('set', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB)
publish = pubsub.addChild('publish', {'node': node})
attrs = {}
if id_ is not None:
attrs = {'id': id_}
publish.addChild('item', attrs, [item])
if options:
publish = pubsub.addChild('publish-options')
publish.addChild(node=_make_publish_options(options))
return query
def _make_publish_options(options):
data = Node(Namespace.DATA + ' x', attrs={'type': 'submit'})
field = data.addChild('field', attrs={'var': 'FORM_TYPE', 'type': 'hidden'})
field.setTagData('value', Namespace.PUBSUB_PUBLISH_OPTIONS)
for var, value in options.items():
field = data.addChild('field', attrs={'var': var})
field.setTagData('value', value)
return data
def _make_retract_request(node, id_, jid, notify):
query = Iq('set', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB)
attrs = {'node': node}
if notify:
attrs['notify'] = 'true'
retract = pubsub.addChild('retract', attrs=attrs)
retract.addChild('item', {'id': id_})
return query
def _make_purge_request(node, jid):
query = Iq('set', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB_OWNER)
pubsub.addChild('purge', attrs={'node': node})
return query
def _make_delete_request(node, jid):
query = Iq('set', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB_OWNER)
pubsub.addChild('delete', attrs={'node': node})
return query
def _make_node_configuration(node, form, jid):
query = Iq('set', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB_OWNER)
configure = pubsub.addChild('configure', {'node': node})
form.setAttr('type', 'submit')
configure.addChild(node=form)
return query
def _make_node_configuration_request(node, jid):
query = Iq('get', to=jid)
pubsub = query.addChild('pubsub', namespace=Namespace.PUBSUB_OWNER)
pubsub.addChild('configure', {'node': node})
return query
def _apply_options(form, options):
for var, value in options.items():
try:
field = form[var]
except KeyError:
pass
else:
field.value = value
PubSubNodeConfigurationResult = namedtuple('PubSubConfigResult',
'jid node form')
PubSubConfigResult = namedtuple('PubSubConfigResult',
'jid node form')
PubSubPublishResult = namedtuple('PubSubPublishResult',
'jid node id')
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