diff options
Diffstat (limited to 'sleekxmpp/plugins/xep_0059')
| -rw-r--r-- | sleekxmpp/plugins/xep_0059/__init__.py | 10 | ||||
| -rw-r--r-- | sleekxmpp/plugins/xep_0059/rsm.py | 118 | ||||
| -rw-r--r-- | sleekxmpp/plugins/xep_0059/stanza.py | 108 |
3 files changed, 236 insertions, 0 deletions
diff --git a/sleekxmpp/plugins/xep_0059/__init__.py b/sleekxmpp/plugins/xep_0059/__init__.py new file mode 100644 index 00000000..3a9b8edf --- /dev/null +++ b/sleekxmpp/plugins/xep_0059/__init__.py @@ -0,0 +1,10 @@ +""" + SleekXMPP: The Sleek XMPP Library + Copyright (C) 2010 Nathanael C. Fritz, Erik Reuterborg Larsson + This file is part of SleekXMPP. + + See the file LICENSE for copying permission. +""" + +from sleekxmpp.plugins.xep_0059.stanza import Set +from sleekxmpp.plugins.xep_0059.rsm import ResultIterator, xep_0059 diff --git a/sleekxmpp/plugins/xep_0059/rsm.py b/sleekxmpp/plugins/xep_0059/rsm.py new file mode 100644 index 00000000..4a01596e --- /dev/null +++ b/sleekxmpp/plugins/xep_0059/rsm.py @@ -0,0 +1,118 @@ +""" + SleekXMPP: The Sleek XMPP Library + Copyright (C) 2010 Nathanael C. Fritz, Erik Reuterborg Larsson + This file is part of SleekXMPP. + + See the file LICENSE for copying permission. +""" + +import logging + +import sleekxmpp +from sleekxmpp import Iq +from sleekxmpp.plugins.base import base_plugin +from sleekxmpp.xmlstream import register_stanza_plugin +from sleekxmpp.plugins.xep_0059 import Set + + +log = logging.getLogger(__name__) + + +class ResultIterator(): + + """ + An iterator for Result Set Managment + """ + + def __init__(self, query, interface, amount=10, start=None, reverse=False): + """ + Arguments: + query -- The template query + interface -- The substanza of the query, for example disco_items + amount -- The max amounts of items to request per iteration + start -- From which item id to start + reverse -- If True, page backwards through the results + + Example: + q = Iq() + q['to'] = 'pubsub.example.com' + q['disco_items']['node'] = 'blog' + for i in ResultIterator(q, 'disco_items', '10'): + print i['disco_items']['items'] + + """ + self.query = query + self.amount = amount + self.start = start + self.interface = interface + self.reverse = reverse + + def __iter__(self): + return self + + def __next__(self): + return self.next() + + def next(self): + """ + Return the next page of results from a query. + + Note: If using backwards paging, then the next page of + results will be the items before the current page + of items. + """ + self.query[self.interface]['rsm']['before'] = self.reverse + self.query['id'] = self.query.stream.new_id() + self.query[self.interface]['rsm']['max'] = str(self.amount) + + if self.start and self.reverse: + self.query[self.interface]['rsm']['before'] = self.start + elif self.start: + self.query[self.interface]['rsm']['after'] = self.start + + r = self.query.send(block=True) + + if not r or not r[self.interface]['rsm']['first'] and \ + not r[self.interface]['rsm']['last']: + raise StopIteration + + if self.reverse: + self.start = r[self.interface]['rsm']['first'] + else: + self.start = r[self.interface]['rsm']['last'] + + return r + + +class xep_0059(base_plugin): + + """ + XEP-0050: Result Set Management + """ + + def plugin_init(self): + """ + Start the XEP-0059 plugin. + """ + self.xep = '0059' + self.description = 'Result Set Management' + self.stanza = sleekxmpp.plugins.xep_0059.stanza + + def post_init(self): + """Handle inter-plugin dependencies.""" + self.xmpp['xep_0030'].add_feature(Set.namespace) + + def iterate(self, stanza, interface): + """ + Create a new result set iterator for a given stanza query. + + Arguments: + stanza -- A stanza object to serve as a template for + queries made each iteration. For example, a + basic disco#items query. + interface -- The name of the substanza to which the + result set management stanza should be + appended. For example, for disco#items queries + the interface 'disco_items' should be used. + """ + return ResultIterator(stanza, interface) diff --git a/sleekxmpp/plugins/xep_0059/stanza.py b/sleekxmpp/plugins/xep_0059/stanza.py new file mode 100644 index 00000000..7c637d0b --- /dev/null +++ b/sleekxmpp/plugins/xep_0059/stanza.py @@ -0,0 +1,108 @@ +""" + SleekXMPP: The Sleek XMPP Library + Copyright (C) 2010 Nathanael C. Fritz, Erik Reuterborg Larsson + This file is part of SleekXMPP. + + See the file LICENSE for copying permission. +""" + +from sleekxmpp.xmlstream import ElementBase, ET +from sleekxmpp.plugins.xep_0030.stanza.items import DiscoItems + + +class Set(ElementBase): + + """ + XEP-0059 (Result Set Managment) can be used to manage the + results of queries. For example, limiting the number of items + per response or starting at certain positions. + + Example set stanzas: + <iq type="get"> + <query xmlns="http://jabber.org/protocol/disco#items"> + <set xmlns="http://jabber.org/protocol/rsm"> + <max>2</max> + </set> + </query> + </iq> + + <iq type="result"> + <query xmlns="http://jabber.org/protocol/disco#items"> + <item jid="conference.example.com" /> + <item jid="pubsub.example.com" /> + <set xmlns="http://jabber.org/protocol/rsm"> + <first>conference.example.com</first> + <last>pubsub.example.com</last> + </set> + </query> + </iq> + + Stanza Interface: + first_index -- The index attribute of <first> + after -- The id defining from which item to start + before -- The id defining from which item to + start when browsing backwards + max -- Max amount per response + first -- Id for the first item in the response + last -- Id for the last item in the response + index -- Used to set an index to start from + count -- The number of remote items available + + Methods: + set_first_index -- Sets the index attribute for <first> and + creates the element if it doesn't exist + get_first_index -- Returns the value of the index + attribute for <first> + del_first_index -- Removes the index attribute for <first> + but keeps the element + set_before -- Sets the value of <before>, if the value is True + then the element will be created without a value + get_before -- Returns the value of <before>, if it is + empty it will return True + + """ + namespace = 'http://jabber.org/protocol/rsm' + name = 'set' + plugin_attrib = 'rsm' + sub_interfaces = set(('first', 'after', 'before', 'count', + 'index', 'last', 'max')) + interfaces = set(('first_index', 'first', 'after', 'before', + 'count', 'index', 'last', 'max')) + + def set_first_index(self, val): + fi = self.find("{%s}first" % (self.namespace)) + if fi is not None: + if val: + fi.attrib['index'] = val + else: + del fi.attrib['index'] + elif val: + fi = ET.Element("{%s}first" % (self.namespace)) + fi.attrib['index'] = val + self.xml.append(fi) + + def get_first_index(self): + fi = self.find("{%s}first" % (self.namespace)) + if fi is not None: + return fi.attrib.get('index', '') + + def del_first_index(self): + fi = self.xml.find("{%s}first" % (self.namespace)) + if fi is not None: + del fi.attrib['index'] + + def set_before(self, val): + b = self.xml.find("{%s}before" % (self.namespace)) + if b is None and val == True: + self._set_sub_text('{%s}before' % self.namespace, '', True) + else: + self._set_sub_text('{%s}before' % self.namespace, val) + + def get_before(self): + b = self.xml.find("{%s}before" % (self.namespace)) + if b is not None and not b.text: + return True + elif b is not None: + return b.text + else: + return None |