mirror of
https://github.com/correl/SleekXMPP.git
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2923f56561
The parsing and namespace cleaning isn't terribly expensive, but it does add up. It was adding an extra 5sec when processing 100,000 basic message stanzas.
1323 lines
48 KiB
Python
1323 lines
48 KiB
Python
# -*- coding: utf-8 -*-
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"""
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sleekxmpp.xmlstream.stanzabase
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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This module implements a wrapper layer for XML objects
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that allows them to be treated like dictionaries.
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Part of SleekXMPP: The Sleek XMPP Library
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:copyright: (c) 2011 Nathanael C. Fritz
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:license: MIT, see LICENSE for more details
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"""
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import copy
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import logging
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import sys
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import weakref
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from xml.etree import cElementTree as ET
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from sleekxmpp.xmlstream import JID
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from sleekxmpp.xmlstream.tostring import tostring
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from sleekxmpp.thirdparty import OrderedDict
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log = logging.getLogger(__name__)
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# Used to check if an argument is an XML object.
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XML_TYPE = type(ET.Element('xml'))
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def register_stanza_plugin(stanza, plugin, iterable=False, overrides=False):
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"""
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Associate a stanza object as a plugin for another stanza.
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>>> from sleekxmpp.xmlstream import register_stanza_plugin
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>>> register_stanza_plugin(Iq, CustomStanza)
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:param class stanza: The class of the parent stanza.
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:param class plugin: The class of the plugin stanza.
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:param bool iterable: Indicates if the plugin stanza should be
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included in the parent stanza's iterable
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``'substanzas'`` interface results.
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:param bool overrides: Indicates if the plugin should be allowed
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to override the interface handlers for
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the parent stanza, based on the plugin's
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``overrides`` field.
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.. versionadded:: 1.0-Beta1
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Made ``register_stanza_plugin`` the default name. The prior
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``registerStanzaPlugin`` function name remains as an alias.
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"""
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tag = "{%s}%s" % (plugin.namespace, plugin.name)
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# Prevent weird memory reference gotchas by ensuring
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# that the parent stanza class has its own set of
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# plugin info maps and is not using the mappings from
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# an ancestor class (like ElementBase).
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plugin_info = ('plugin_attrib_map', 'plugin_tag_map',
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'plugin_iterables', 'plugin_overrides')
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for attr in plugin_info:
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info = getattr(stanza, attr)
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setattr(stanza, attr, info.copy())
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stanza.plugin_attrib_map[plugin.plugin_attrib] = plugin
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stanza.plugin_tag_map[tag] = plugin
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if iterable:
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stanza.plugin_iterables.add(plugin)
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if overrides:
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for interface in plugin.overrides:
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stanza.plugin_overrides[interface] = plugin.plugin_attrib
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# To maintain backwards compatibility for now, preserve the camel case name.
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registerStanzaPlugin = register_stanza_plugin
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def fix_ns(xpath, split=False, propagate_ns=True, default_ns=''):
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"""Apply the stanza's namespace to elements in an XPath expression.
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:param string xpath: The XPath expression to fix with namespaces.
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:param bool split: Indicates if the fixed XPath should be left as a
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list of element names with namespaces. Defaults to
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False, which returns a flat string path.
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:param bool propagate_ns: Overrides propagating parent element
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namespaces to child elements. Useful if
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you wish to simply split an XPath that has
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non-specified namespaces, and child and
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parent namespaces are known not to always
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match. Defaults to True.
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"""
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fixed = []
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# Split the XPath into a series of blocks, where a block
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# is started by an element with a namespace.
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ns_blocks = xpath.split('{')
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for ns_block in ns_blocks:
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if '}' in ns_block:
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# Apply the found namespace to following elements
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# that do not have namespaces.
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namespace = ns_block.split('}')[0]
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elements = ns_block.split('}')[1].split('/')
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else:
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# Apply the stanza's namespace to the following
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# elements since no namespace was provided.
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namespace = default_ns
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elements = ns_block.split('/')
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for element in elements:
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if element:
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# Skip empty entry artifacts from splitting.
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if propagate_ns:
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tag = '{%s}%s' % (namespace, element)
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else:
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tag = element
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fixed.append(tag)
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if split:
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return fixed
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return '/'.join(fixed)
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class ElementBase(object):
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"""
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The core of SleekXMPP's stanza XML manipulation and handling is provided
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by ElementBase. ElementBase wraps XML cElementTree objects and enables
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access to the XML contents through dictionary syntax, similar in style
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to the Ruby XMPP library Blather's stanza implementation.
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Stanzas are defined by their name, namespace, and interfaces. For
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example, a simplistic Message stanza could be defined as::
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>>> class Message(ElementBase):
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... name = "message"
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... namespace = "jabber:client"
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... interfaces = set(('to', 'from', 'type', 'body'))
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... sub_interfaces = set(('body',))
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The resulting Message stanza's contents may be accessed as so::
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>>> message['to'] = "user@example.com"
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>>> message['body'] = "Hi!"
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>>> message['body']
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"Hi!"
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>>> del message['body']
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>>> message['body']
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""
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The interface values map to either custom access methods, stanza
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XML attributes, or (if the interface is also in sub_interfaces) the
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text contents of a stanza's subelement.
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Custom access methods may be created by adding methods of the
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form "getInterface", "setInterface", or "delInterface", where
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"Interface" is the titlecase version of the interface name.
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Stanzas may be extended through the use of plugins. A plugin
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is simply a stanza that has a plugin_attrib value. For example::
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>>> class MessagePlugin(ElementBase):
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... name = "custom_plugin"
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... namespace = "custom"
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... interfaces = set(('useful_thing', 'custom'))
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... plugin_attrib = "custom"
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The plugin stanza class must be associated with its intended
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container stanza by using register_stanza_plugin as so::
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>>> register_stanza_plugin(Message, MessagePlugin)
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The plugin may then be accessed as if it were built-in to the parent
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stanza::
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>>> message['custom']['useful_thing'] = 'foo'
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If a plugin provides an interface that is the same as the plugin's
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plugin_attrib value, then the plugin's interface may be assigned
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directly from the parent stanza, as shown below, but retrieving
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information will require all interfaces to be used, as so::
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>>> message['custom'] = 'bar' # Same as using message['custom']['custom']
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>>> message['custom']['custom'] # Must use all interfaces
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'bar'
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If the plugin sets :attr:`is_extension` to ``True``, then both setting
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and getting an interface value that is the same as the plugin's
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plugin_attrib value will work, as so::
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>>> message['custom'] = 'bar' # Using is_extension=True
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>>> message['custom']
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'bar'
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:param xml: Initialize the stanza object with an existing XML object.
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:param parent: Optionally specify a parent stanza object will will
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contain this substanza.
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"""
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#: The XML tag name of the element, not including any namespace
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#: prefixes. For example, an :class:`ElementBase` object for ``<message />``
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#: would use ``name = 'message'``.
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name = 'stanza'
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#: The XML namespace for the element. Given ``<foo xmlns="bar" />``,
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#: then ``namespace = "bar"`` should be used. The default namespace
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#: is ``jabber:client`` since this is being used in an XMPP library.
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namespace = 'jabber:client'
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#: For :class:`ElementBase` subclasses which are intended to be used
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#: as plugins, the ``plugin_attrib`` value defines the plugin name.
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#: Plugins may be accessed by using the ``plugin_attrib`` value as
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#: the interface. An example using ``plugin_attrib = 'foo'``::
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#:
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#: register_stanza_plugin(Message, FooPlugin)
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#: msg = Message()
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#: msg['foo']['an_interface_from_the_foo_plugin']
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plugin_attrib = 'plugin'
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#: The set of keys that the stanza provides for accessing and
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#: manipulating the underlying XML object. This set may be augmented
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#: with the :attr:`plugin_attrib` value of any registered
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#: stanza plugins.
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interfaces = set(('type', 'to', 'from', 'id', 'payload'))
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#: A subset of :attr:`interfaces` which maps interfaces to direct
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#: subelements of the underlying XML object. Using this set, the text
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#: of these subelements may be set, retrieved, or removed without
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#: needing to define custom methods.
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sub_interfaces = tuple()
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#: In some cases you may wish to override the behaviour of one of the
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#: parent stanza's interfaces. The ``overrides`` list specifies the
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#: interface name and access method to be overridden. For example,
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#: to override setting the parent's ``'condition'`` interface you
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#: would use::
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#:
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#: overrides = ['set_condition']
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#:
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#: Getting and deleting the ``'condition'`` interface would not
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#: be affected.
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#:
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#: .. versionadded:: 1.0-Beta5
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overrides = []
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#: If you need to add a new interface to an existing stanza, you
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#: can create a plugin and set ``is_extension = True``. Be sure
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#: to set the :attr:`plugin_attrib` value to the desired interface
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#: name, and that it is the only interface listed in
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#: :attr:`interfaces`. Requests for the new interface from the
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#: parent stanza will be passed to the plugin directly.
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#:
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#: .. versionadded:: 1.0-Beta5
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is_extension = False
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#: A map of interface operations to the overriding functions.
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#: For example, after overriding the ``set`` operation for
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#: the interface ``body``, :attr:`plugin_overrides` would be::
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#:
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#: {'set_body': <some function>}
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#:
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#: .. versionadded: 1.0-Beta5
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plugin_overrides = {}
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#: A mapping of the :attr:`plugin_attrib` values of registered
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#: plugins to their respective classes.
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plugin_attrib_map = {}
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#: A mapping of root element tag names (in ``'{namespace}elementname'``
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#: format) to the plugin classes responsible for them.
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plugin_tag_map = {}
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#: The set of stanza classes that can be iterated over using
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#: the 'substanzas' interface. Classes are added to this set
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#: when registering a plugin with ``iterable=True``::
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#:
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#: register_stanza_plugin(DiscoInfo, DiscoItem, iterable=True)
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#:
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#: .. versionadded:: 1.0-Beta5
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plugin_iterables = set()
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#: A deprecated version of :attr:`plugin_iterables` that remains
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#: for backward compatibility. It required a parent stanza to
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#: know beforehand what stanza classes would be iterable::
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#:
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#: class DiscoItem(ElementBase):
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#: ...
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#:
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#: class DiscoInfo(ElementBase):
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#: subitem = (DiscoItem, )
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#: ...
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#:
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#: .. deprecated:: 1.0-Beta5
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subitem = set()
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#: The default XML namespace: ``http://www.w3.org/XML/1998/namespace``.
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xml_ns = 'http://www.w3.org/XML/1998/namespace'
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def __init__(self, xml=None, parent=None):
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self._index = 0
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#: The underlying XML object for the stanza. It is a standard
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#: :class:`xml.etree.cElementTree` object.
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self.xml = xml
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#: An ordered dictionary of plugin stanzas, mapped by their
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#: :attr:`plugin_attrib` value.
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self.plugins = OrderedDict()
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#: A list of child stanzas whose class is included in
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#: :attr:`plugin_iterables`.
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self.iterables = []
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#: The name of the tag for the stanza's root element. It is the
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#: same as calling :meth:`tag_name()` and is formatted as
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#: ``'{namespace}elementname'``.
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self.tag = self.tag_name()
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#: A :class:`weakref.weakref` to the parent stanza, if there is one.
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#: If not, then :attr:`parent` is ``None``.
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self.parent = None
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if parent is not None:
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self.parent = weakref.ref(parent)
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if self.subitem is not None:
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for sub in self.subitem:
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self.plugin_iterables.add(sub)
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if self.setup(xml):
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# If we generated our own XML, then everything is ready.
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return
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# Initialize values using provided XML
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for child in self.xml.getchildren():
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if child.tag in self.plugin_tag_map:
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plugin_class = self.plugin_tag_map[child.tag]
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plugin = plugin_class(child, self)
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self.plugins[plugin.plugin_attrib] = plugin
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if plugin_class in self.plugin_iterables:
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self.iterables.append(plugin)
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def setup(self, xml=None):
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"""Initialize the stanza's XML contents.
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Will return ``True`` if XML was generated according to the stanza's
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definition instead of building a stanza object from an existing
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XML object.
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:param xml: An existing XML object to use for the stanza's content
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instead of generating new XML.
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"""
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if self.xml is None:
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self.xml = xml
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if self.xml is None:
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# Generate XML from the stanza definition
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for ename in self.name.split('/'):
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new = ET.Element("{%s}%s" % (self.namespace, ename))
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if self.xml is None:
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self.xml = new
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else:
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last_xml.append(new)
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last_xml = new
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if self.parent is not None:
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self.parent().xml.append(self.xml)
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# We had to generate XML
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return True
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else:
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# We did not generate XML
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return False
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def enable(self, attrib):
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"""Enable and initialize a stanza plugin.
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Alias for :meth:`init_plugin`.
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:param string attrib: The :attr:`plugin_attrib` value of the
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plugin to enable.
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"""
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return self.init_plugin(attrib)
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def init_plugin(self, attrib):
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"""Enable and initialize a stanza plugin.
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:param string attrib: The :attr:`plugin_attrib` value of the
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plugin to enable.
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"""
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if attrib not in self.plugins:
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plugin_class = self.plugin_attrib_map[attrib]
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existing_xml = self.xml.find(plugin_class.tag_name())
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plugin = plugin_class(parent=self, xml=existing_xml)
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self.plugins[attrib] = plugin
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if plugin_class in self.plugin_iterables:
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self.iterables.append(plugin)
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return self
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def _get_stanza_values(self):
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"""Return A JSON/dictionary version of the XML content
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exposed through the stanza's interfaces::
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>>> msg = Message()
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>>> msg.values
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{'body': '', 'from': , 'mucnick': '', 'mucroom': '',
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'to': , 'type': 'normal', 'id': '', 'subject': ''}
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Likewise, assigning to :attr:`values` will change the XML
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content::
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>>> msg = Message()
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>>> msg.values = {'body': 'Hi!', 'to': 'user@example.com'}
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>>> msg
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'<message to="user@example.com"><body>Hi!</body></message>'
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.. versionadded:: 1.0-Beta1
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"""
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values = {}
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for interface in self.interfaces:
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values[interface] = self[interface]
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for plugin, stanza in self.plugins.items():
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values[plugin] = stanza.values
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if self.iterables:
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iterables = []
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for stanza in self.iterables:
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iterables.append(stanza.values)
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iterables[-1]['__childtag__'] = stanza.tag
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values['substanzas'] = iterables
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return values
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def _set_stanza_values(self, values):
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"""Set multiple stanza interface values using a dictionary.
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Stanza plugin values may be set using nested dictionaries.
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:param values: A dictionary mapping stanza interface with values.
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Plugin interfaces may accept a nested dictionary that
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will be used recursively.
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.. versionadded:: 1.0-Beta1
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"""
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iterable_interfaces = [p.plugin_attrib for \
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p in self.plugin_iterables]
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for interface, value in values.items():
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if interface == 'substanzas':
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# Remove existing substanzas
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for stanza in self.iterables:
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self.xml.remove(stanza.xml)
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self.iterables = []
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# Add new substanzas
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for subdict in value:
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if '__childtag__' in subdict:
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for subclass in self.plugin_iterables:
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child_tag = "{%s}%s" % (subclass.namespace,
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subclass.name)
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if subdict['__childtag__'] == child_tag:
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sub = subclass(parent=self)
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sub.values = subdict
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self.iterables.append(sub)
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break
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elif interface in self.interfaces:
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self[interface] = value
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elif interface in self.plugin_attrib_map:
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if interface not in iterable_interfaces:
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if interface not in self.plugins:
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self.init_plugin(interface)
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self.plugins[interface].values = value
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return self
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def __getitem__(self, attrib):
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"""Return the value of a stanza interface using dict-like syntax.
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Example::
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>>> msg['body']
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'Message contents'
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Stanza interfaces are typically mapped directly to the underlying XML
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object, but can be overridden by the presence of a ``get_attrib``
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method (or ``get_foo`` where the interface is named ``'foo'``, etc).
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The search order for interface value retrieval for an interface
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named ``'foo'`` is:
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1. The list of substanzas (``'substanzas'``)
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2. The result of calling the ``get_foo`` override handler.
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3. The result of calling ``get_foo``.
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4. The result of calling ``getFoo``.
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5. The contents of the ``foo`` subelement, if ``foo`` is listed
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in :attr:`sub_interfaces`.
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6. The value of the ``foo`` attribute of the XML object.
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7. The plugin named ``'foo'``
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8. An empty string.
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:param string attrib: The name of the requested stanza interface.
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"""
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if attrib == 'substanzas':
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return self.iterables
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elif attrib in self.interfaces:
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get_method = "get_%s" % attrib.lower()
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get_method2 = "get%s" % attrib.title()
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if self.plugin_overrides:
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plugin = self.plugin_overrides.get(get_method, None)
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if plugin:
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if plugin not in self.plugins:
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self.init_plugin(plugin)
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handler = getattr(self.plugins[plugin], get_method, None)
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if handler:
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return handler()
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if hasattr(self, get_method):
|
|
return getattr(self, get_method)()
|
|
elif hasattr(self, get_method2):
|
|
return getattr(self, get_method2)()
|
|
else:
|
|
if attrib in self.sub_interfaces:
|
|
return self._get_sub_text(attrib)
|
|
else:
|
|
return self._get_attr(attrib)
|
|
elif attrib in self.plugin_attrib_map:
|
|
if attrib not in self.plugins:
|
|
self.init_plugin(attrib)
|
|
if self.plugins[attrib].is_extension:
|
|
return self.plugins[attrib][attrib]
|
|
return self.plugins[attrib]
|
|
else:
|
|
return ''
|
|
|
|
def __setitem__(self, attrib, value):
|
|
"""Set the value of a stanza interface using dictionary-like syntax.
|
|
|
|
Example::
|
|
|
|
>>> msg['body'] = "Hi!"
|
|
>>> msg['body']
|
|
'Hi!'
|
|
|
|
Stanza interfaces are typically mapped directly to the underlying XML
|
|
object, but can be overridden by the presence of a ``set_attrib``
|
|
method (or ``set_foo`` where the interface is named ``'foo'``, etc).
|
|
|
|
The effect of interface value assignment for an interface
|
|
named ``'foo'`` will be one of:
|
|
|
|
1. Delete the interface's contents if the value is None.
|
|
2. Call the ``set_foo`` override handler, if it exists.
|
|
3. Call ``set_foo``, if it exists.
|
|
4. Call ``setFoo``, if it exists.
|
|
5. Set the text of a ``foo`` element, if ``'foo'`` is
|
|
in :attr:`sub_interfaces`.
|
|
6. Set the value of a top level XML attribute named ``foo``.
|
|
7. Attempt to pass the value to a plugin named ``'foo'`` using
|
|
the plugin's ``'foo'`` interface.
|
|
8. Do nothing.
|
|
|
|
:param string attrib: The name of the stanza interface to modify.
|
|
:param value: The new value of the stanza interface.
|
|
"""
|
|
if attrib in self.interfaces:
|
|
if value is not None:
|
|
set_method = "set_%s" % attrib.lower()
|
|
set_method2 = "set%s" % attrib.title()
|
|
|
|
if self.plugin_overrides:
|
|
plugin = self.plugin_overrides.get(set_method, None)
|
|
if plugin:
|
|
if plugin not in self.plugins:
|
|
self.init_plugin(plugin)
|
|
handler = getattr(self.plugins[plugin],
|
|
set_method, None)
|
|
if handler:
|
|
return handler(value)
|
|
|
|
if hasattr(self, set_method):
|
|
getattr(self, set_method)(value,)
|
|
elif hasattr(self, set_method2):
|
|
getattr(self, set_method2)(value,)
|
|
else:
|
|
if attrib in self.sub_interfaces:
|
|
return self._set_sub_text(attrib, text=value)
|
|
else:
|
|
self._set_attr(attrib, value)
|
|
else:
|
|
self.__delitem__(attrib)
|
|
elif attrib in self.plugin_attrib_map:
|
|
if attrib not in self.plugins:
|
|
self.init_plugin(attrib)
|
|
self.plugins[attrib][attrib] = value
|
|
return self
|
|
|
|
def __delitem__(self, attrib):
|
|
"""Delete the value of a stanza interface using dict-like syntax.
|
|
|
|
Example::
|
|
|
|
>>> msg['body'] = "Hi!"
|
|
>>> msg['body']
|
|
'Hi!'
|
|
>>> del msg['body']
|
|
>>> msg['body']
|
|
''
|
|
|
|
Stanza interfaces are typically mapped directly to the underlyig XML
|
|
object, but can be overridden by the presence of a ``del_attrib``
|
|
method (or ``del_foo`` where the interface is named ``'foo'``, etc).
|
|
|
|
The effect of deleting a stanza interface value named ``foo`` will be
|
|
one of:
|
|
|
|
1. Call ``del_foo`` override handler, if it exists.
|
|
2. Call ``del_foo``, if it exists.
|
|
3. Call ``delFoo``, if it exists.
|
|
4. Delete ``foo`` element, if ``'foo'`` is in
|
|
:attr:`sub_interfaces`.
|
|
5. Delete top level XML attribute named ``foo``.
|
|
6. Remove the ``foo`` plugin, if it was loaded.
|
|
7. Do nothing.
|
|
|
|
:param attrib: The name of the affected stanza interface.
|
|
"""
|
|
if attrib in self.interfaces:
|
|
del_method = "del_%s" % attrib.lower()
|
|
del_method2 = "del%s" % attrib.title()
|
|
|
|
if self.plugin_overrides:
|
|
plugin = self.plugin_overrides.get(del_method, None)
|
|
if plugin:
|
|
if plugin not in self.plugins:
|
|
self.init_plugin(plugin)
|
|
handler = getattr(self.plugins[plugin], del_method, None)
|
|
if handler:
|
|
return handler()
|
|
|
|
if hasattr(self, del_method):
|
|
getattr(self, del_method)()
|
|
elif hasattr(self, del_method2):
|
|
getattr(self, del_method2)()
|
|
else:
|
|
if attrib in self.sub_interfaces:
|
|
return self._del_sub(attrib)
|
|
else:
|
|
self._del_attr(attrib)
|
|
elif attrib in self.plugin_attrib_map:
|
|
if attrib in self.plugins:
|
|
xml = self.plugins[attrib].xml
|
|
if self.plugins[attrib].is_extension:
|
|
del self.plugins[attrib][attrib]
|
|
del self.plugins[attrib]
|
|
try:
|
|
self.xml.remove(xml)
|
|
except:
|
|
pass
|
|
return self
|
|
|
|
def _set_attr(self, name, value):
|
|
"""Set the value of a top level attribute of the XML object.
|
|
|
|
If the new value is None or an empty string, then the attribute will
|
|
be removed.
|
|
|
|
:param name: The name of the attribute.
|
|
:param value: The new value of the attribute, or None or '' to
|
|
remove it.
|
|
"""
|
|
if value is None or value == '':
|
|
self.__delitem__(name)
|
|
else:
|
|
self.xml.attrib[name] = value
|
|
|
|
def _del_attr(self, name):
|
|
"""Remove a top level attribute of the XML object.
|
|
|
|
:param name: The name of the attribute.
|
|
"""
|
|
if name in self.xml.attrib:
|
|
del self.xml.attrib[name]
|
|
|
|
def _get_attr(self, name, default=''):
|
|
"""Return the value of a top level attribute of the XML object.
|
|
|
|
In case the attribute has not been set, a default value can be
|
|
returned instead. An empty string is returned if no other default
|
|
is supplied.
|
|
|
|
:param name: The name of the attribute.
|
|
:param default: Optional value to return if the attribute has not
|
|
been set. An empty string is returned otherwise.
|
|
"""
|
|
return self.xml.attrib.get(name, default)
|
|
|
|
def _get_sub_text(self, name, default=''):
|
|
"""Return the text contents of a sub element.
|
|
|
|
In case the element does not exist, or it has no textual content,
|
|
a default value can be returned instead. An empty string is returned
|
|
if no other default is supplied.
|
|
|
|
:param name: The name or XPath expression of the element.
|
|
:param default: Optional default to return if the element does
|
|
not exists. An empty string is returned otherwise.
|
|
"""
|
|
name = self._fix_ns(name)
|
|
stanza = self.xml.find(name)
|
|
if stanza is None or stanza.text is None:
|
|
return default
|
|
else:
|
|
return stanza.text
|
|
|
|
def _set_sub_text(self, name, text=None, keep=False):
|
|
"""Set the text contents of a sub element.
|
|
|
|
In case the element does not exist, a element will be created,
|
|
and its text contents will be set.
|
|
|
|
If the text is set to an empty string, or None, then the
|
|
element will be removed, unless keep is set to True.
|
|
|
|
:param name: The name or XPath expression of the element.
|
|
:param text: The new textual content of the element. If the text
|
|
is an empty string or None, the element will be removed
|
|
unless the parameter keep is True.
|
|
:param keep: Indicates if the element should be kept if its text is
|
|
removed. Defaults to False.
|
|
"""
|
|
path = self._fix_ns(name, split=True)
|
|
element = self.xml.find(name)
|
|
|
|
if not text and not keep:
|
|
return self._del_sub(name)
|
|
|
|
if element is None:
|
|
# We need to add the element. If the provided name was
|
|
# an XPath expression, some of the intermediate elements
|
|
# may already exist. If so, we want to use those instead
|
|
# of generating new elements.
|
|
last_xml = self.xml
|
|
walked = []
|
|
for ename in path:
|
|
walked.append(ename)
|
|
element = self.xml.find("/".join(walked))
|
|
if element is None:
|
|
element = ET.Element(ename)
|
|
last_xml.append(element)
|
|
last_xml = element
|
|
element = last_xml
|
|
|
|
element.text = text
|
|
return element
|
|
|
|
def _del_sub(self, name, all=False):
|
|
"""Remove sub elements that match the given name or XPath.
|
|
|
|
If the element is in a path, then any parent elements that become
|
|
empty after deleting the element may also be deleted if requested
|
|
by setting all=True.
|
|
|
|
:param name: The name or XPath expression for the element(s) to remove.
|
|
:param bool all: If True, remove all empty elements in the path to the
|
|
deleted element. Defaults to False.
|
|
"""
|
|
path = self._fix_ns(name, split=True)
|
|
original_target = path[-1]
|
|
|
|
for level, _ in enumerate(path):
|
|
# Generate the paths to the target elements and their parent.
|
|
element_path = "/".join(path[:len(path) - level])
|
|
parent_path = "/".join(path[:len(path) - level - 1])
|
|
|
|
elements = self.xml.findall(element_path)
|
|
parent = self.xml.find(parent_path)
|
|
|
|
if elements:
|
|
if parent is None:
|
|
parent = self.xml
|
|
for element in elements:
|
|
if element.tag == original_target or \
|
|
not element.getchildren():
|
|
# Only delete the originally requested elements, and
|
|
# any parent elements that have become empty.
|
|
parent.remove(element)
|
|
if not all:
|
|
# If we don't want to delete elements up the tree, stop
|
|
# after deleting the first level of elements.
|
|
return
|
|
|
|
def match(self, xpath):
|
|
"""Compare a stanza object with an XPath-like expression.
|
|
|
|
If the XPath matches the contents of the stanza object, the match
|
|
is successful.
|
|
|
|
The XPath expression may include checks for stanza attributes.
|
|
For example::
|
|
|
|
'presence@show=xa@priority=2/status'
|
|
|
|
Would match a presence stanza whose show value is set to ``'xa'``,
|
|
has a priority value of ``'2'``, and has a status element.
|
|
|
|
:param string xpath: The XPath expression to check against. It
|
|
may be either a string or a list of element
|
|
names with attribute checks.
|
|
"""
|
|
if not isinstance(xpath, list):
|
|
xpath = self._fix_ns(xpath, split=True, propagate_ns=False)
|
|
|
|
# Extract the tag name and attribute checks for the first XPath node.
|
|
components = xpath[0].split('@')
|
|
tag = components[0]
|
|
attributes = components[1:]
|
|
|
|
if tag not in (self.name, "{%s}%s" % (self.namespace, self.name)) and \
|
|
tag not in self.plugins and tag not in self.plugin_attrib:
|
|
# The requested tag is not in this stanza, so no match.
|
|
return False
|
|
|
|
# Check the rest of the XPath against any substanzas.
|
|
matched_substanzas = False
|
|
for substanza in self.iterables:
|
|
if xpath[1:] == []:
|
|
break
|
|
matched_substanzas = substanza.match(xpath[1:])
|
|
if matched_substanzas:
|
|
break
|
|
|
|
# Check attribute values.
|
|
for attribute in attributes:
|
|
name, value = attribute.split('=')
|
|
if self[name] != value:
|
|
return False
|
|
|
|
# Check sub interfaces.
|
|
if len(xpath) > 1:
|
|
next_tag = xpath[1]
|
|
if next_tag in self.sub_interfaces and self[next_tag]:
|
|
return True
|
|
|
|
# Attempt to continue matching the XPath using the stanza's plugins.
|
|
if not matched_substanzas and len(xpath) > 1:
|
|
# Convert {namespace}tag@attribs to just tag
|
|
next_tag = xpath[1].split('@')[0].split('}')[-1]
|
|
if next_tag in self.plugins:
|
|
return self.plugins[next_tag].match(xpath[1:])
|
|
else:
|
|
return False
|
|
|
|
# Everything matched.
|
|
return True
|
|
|
|
def find(self, xpath):
|
|
"""Find an XML object in this stanza given an XPath expression.
|
|
|
|
Exposes ElementTree interface for backwards compatibility.
|
|
|
|
.. note::
|
|
|
|
Matching on attribute values is not supported in Python 2.6
|
|
or Python 3.1
|
|
|
|
:param string xpath: An XPath expression matching a single
|
|
desired element.
|
|
"""
|
|
return self.xml.find(xpath)
|
|
|
|
def findall(self, xpath):
|
|
"""Find multiple XML objects in this stanza given an XPath expression.
|
|
|
|
Exposes ElementTree interface for backwards compatibility.
|
|
|
|
.. note::
|
|
|
|
Matching on attribute values is not supported in Python 2.6
|
|
or Python 3.1.
|
|
|
|
:param string xpath: An XPath expression matching multiple
|
|
desired elements.
|
|
"""
|
|
return self.xml.findall(xpath)
|
|
|
|
def get(self, key, default=None):
|
|
"""Return the value of a stanza interface.
|
|
|
|
If the found value is None or an empty string, return the supplied
|
|
default value.
|
|
|
|
Allows stanza objects to be used like dictionaries.
|
|
|
|
:param string key: The name of the stanza interface to check.
|
|
:param default: Value to return if the stanza interface has a value
|
|
of ``None`` or ``""``. Will default to returning None.
|
|
"""
|
|
value = self[key]
|
|
if value is None or value == '':
|
|
return default
|
|
return value
|
|
|
|
def keys(self):
|
|
"""Return the names of all stanza interfaces provided by the
|
|
stanza object.
|
|
|
|
Allows stanza objects to be used like dictionaries.
|
|
"""
|
|
out = []
|
|
out += [x for x in self.interfaces]
|
|
out += [x for x in self.plugins]
|
|
if self.iterables:
|
|
out.append('substanzas')
|
|
return out
|
|
|
|
def append(self, item):
|
|
"""Append either an XML object or a substanza to this stanza object.
|
|
|
|
If a substanza object is appended, it will be added to the list
|
|
of iterable stanzas.
|
|
|
|
Allows stanza objects to be used like lists.
|
|
|
|
:param item: Either an XML object or a stanza object to add to
|
|
this stanza's contents.
|
|
"""
|
|
if not isinstance(item, ElementBase):
|
|
if type(item) == XML_TYPE:
|
|
return self.appendxml(item)
|
|
else:
|
|
raise TypeError
|
|
self.xml.append(item.xml)
|
|
self.iterables.append(item)
|
|
return self
|
|
|
|
def appendxml(self, xml):
|
|
"""Append an XML object to the stanza's XML.
|
|
|
|
The added XML will not be included in the list of
|
|
iterable substanzas.
|
|
|
|
:param XML xml: The XML object to add to the stanza.
|
|
"""
|
|
self.xml.append(xml)
|
|
return self
|
|
|
|
def pop(self, index=0):
|
|
"""Remove and return the last substanza in the list of
|
|
iterable substanzas.
|
|
|
|
Allows stanza objects to be used like lists.
|
|
|
|
:param int index: The index of the substanza to remove.
|
|
"""
|
|
substanza = self.iterables.pop(index)
|
|
self.xml.remove(substanza.xml)
|
|
return substanza
|
|
|
|
def next(self):
|
|
"""Return the next iterable substanza."""
|
|
return self.__next__()
|
|
|
|
def clear(self):
|
|
"""Remove all XML element contents and plugins.
|
|
|
|
Any attribute values will be preserved.
|
|
"""
|
|
for child in self.xml.getchildren():
|
|
self.xml.remove(child)
|
|
for plugin in list(self.plugins.keys()):
|
|
del self.plugins[plugin]
|
|
return self
|
|
|
|
@classmethod
|
|
def tag_name(cls):
|
|
"""Return the namespaced name of the stanza's root element.
|
|
|
|
The format for the tag name is::
|
|
|
|
'{namespace}elementname'
|
|
|
|
For example, for the stanza ``<foo xmlns="bar" />``,
|
|
``stanza.tag_name()`` would return ``"{bar}foo"``.
|
|
"""
|
|
return "{%s}%s" % (cls.namespace, cls.name)
|
|
|
|
@property
|
|
def attrib(self):
|
|
"""Return the stanza object itself.
|
|
|
|
Older implementations of stanza objects used XML objects directly,
|
|
requiring the use of ``.attrib`` to access attribute values.
|
|
|
|
Use of the dictionary syntax with the stanza object itself for
|
|
accessing stanza interfaces is preferred.
|
|
|
|
.. deprecated:: 1.0
|
|
"""
|
|
return self
|
|
|
|
def _fix_ns(self, xpath, split=False, propagate_ns=True):
|
|
return fix_ns(xpath, split=split,
|
|
propagate_ns=propagate_ns,
|
|
default_ns=self.namespace)
|
|
|
|
def __eq__(self, other):
|
|
"""Compare the stanza object with another to test for equality.
|
|
|
|
Stanzas are equal if their interfaces return the same values,
|
|
and if they are both instances of ElementBase.
|
|
|
|
:param ElementBase other: The stanza object to compare against.
|
|
"""
|
|
if not isinstance(other, ElementBase):
|
|
return False
|
|
|
|
# Check that this stanza is a superset of the other stanza.
|
|
values = self.values
|
|
for key in other.keys():
|
|
if key not in values or values[key] != other[key]:
|
|
return False
|
|
|
|
# Check that the other stanza is a superset of this stanza.
|
|
values = other.values
|
|
for key in self.keys():
|
|
if key not in values or values[key] != self[key]:
|
|
return False
|
|
|
|
# Both stanzas are supersets of each other, therefore they
|
|
# must be equal.
|
|
return True
|
|
|
|
def __ne__(self, other):
|
|
"""Compare the stanza object with another to test for inequality.
|
|
|
|
Stanzas are not equal if their interfaces return different values,
|
|
or if they are not both instances of ElementBase.
|
|
|
|
:param ElementBase other: The stanza object to compare against.
|
|
"""
|
|
return not self.__eq__(other)
|
|
|
|
def __bool__(self):
|
|
"""Stanza objects should be treated as True in boolean contexts.
|
|
|
|
Python 3.x version.
|
|
"""
|
|
return True
|
|
|
|
def __nonzero__(self):
|
|
"""Stanza objects should be treated as True in boolean contexts.
|
|
|
|
Python 2.x version.
|
|
"""
|
|
return True
|
|
|
|
def __len__(self):
|
|
"""Return the number of iterable substanzas in this stanza."""
|
|
return len(self.iterables)
|
|
|
|
def __iter__(self):
|
|
"""Return an iterator object for the stanza's substanzas.
|
|
|
|
The iterator is the stanza object itself. Attempting to use two
|
|
iterators on the same stanza at the same time is discouraged.
|
|
"""
|
|
self._index = 0
|
|
return self
|
|
|
|
def __next__(self):
|
|
"""Return the next iterable substanza."""
|
|
self._index += 1
|
|
if self._index > len(self.iterables):
|
|
self._index = 0
|
|
raise StopIteration
|
|
return self.iterables[self._index - 1]
|
|
|
|
def __copy__(self):
|
|
"""Return a copy of the stanza object that does not share the same
|
|
underlying XML object.
|
|
"""
|
|
return self.__class__(xml=copy.deepcopy(self.xml), parent=self.parent)
|
|
|
|
def __str__(self, top_level_ns=True):
|
|
"""Return a string serialization of the underlying XML object.
|
|
|
|
.. seealso:: :ref:`tostring`
|
|
|
|
:param bool top_level_ns: Display the top-most namespace.
|
|
Defaults to True.
|
|
"""
|
|
stanza_ns = '' if top_level_ns else self.namespace
|
|
return tostring(self.xml, xmlns='',
|
|
stanza_ns=stanza_ns,
|
|
top_level=not top_level_ns)
|
|
|
|
def __repr__(self):
|
|
"""Use the stanza's serialized XML as its representation."""
|
|
return self.__str__()
|
|
|
|
|
|
class StanzaBase(ElementBase):
|
|
|
|
"""
|
|
StanzaBase provides the foundation for all other stanza objects used
|
|
by SleekXMPP, and defines a basic set of interfaces common to nearly
|
|
all stanzas. These interfaces are the ``'id'``, ``'type'``, ``'to'``,
|
|
and ``'from'`` attributes. An additional interface, ``'payload'``, is
|
|
available to access the XML contents of the stanza. Most stanza objects
|
|
will provided more specific interfaces, however.
|
|
|
|
**Stanza Interfaces:**
|
|
|
|
:id: An optional id value that can be used to associate stanzas
|
|
:to: A JID object representing the recipient's JID.
|
|
:from: A JID object representing the sender's JID.
|
|
with their replies.
|
|
:type: The type of stanza, typically will be ``'normal'``,
|
|
``'error'``, ``'get'``, or ``'set'``, etc.
|
|
:payload: The XML contents of the stanza.
|
|
|
|
:param XMLStream stream: Optional :class:`sleekxmpp.xmlstream.XMLStream`
|
|
object responsible for sending this stanza.
|
|
:param XML xml: Optional XML contents to initialize stanza values.
|
|
:param string stype: Optional stanza type value.
|
|
:param sto: Optional string or :class:`sleekxmpp.xmlstream.JID`
|
|
object of the recipient's JID.
|
|
:param sfrom: Optional string or :class:`sleekxmpp.xmlstream.JID`
|
|
object of the sender's JID.
|
|
:param string sid: Optional ID value for the stanza.
|
|
"""
|
|
|
|
#: The default XMPP client namespace
|
|
namespace = 'jabber:client'
|
|
|
|
#: There is a small set of attributes which apply to all XMPP stanzas:
|
|
#: the stanza type, the to and from JIDs, the stanza ID, and, especially
|
|
#: in the case of an Iq stanza, a payload.
|
|
interfaces = set(('type', 'to', 'from', 'id', 'payload'))
|
|
|
|
#: A basic set of allowed values for the ``'type'`` interface.
|
|
types = set(('get', 'set', 'error', None, 'unavailable', 'normal', 'chat'))
|
|
|
|
def __init__(self, stream=None, xml=None, stype=None,
|
|
sto=None, sfrom=None, sid=None):
|
|
self.stream = stream
|
|
if stream is not None:
|
|
self.namespace = stream.default_ns
|
|
ElementBase.__init__(self, xml)
|
|
if stype is not None:
|
|
self['type'] = stype
|
|
if sto is not None:
|
|
self['to'] = sto
|
|
if sfrom is not None:
|
|
self['from'] = sfrom
|
|
self.tag = "{%s}%s" % (self.namespace, self.name)
|
|
|
|
def set_type(self, value):
|
|
"""Set the stanza's ``'type'`` attribute.
|
|
|
|
Only type values contained in :attr:`types` are accepted.
|
|
|
|
:param string value: One of the values contained in :attr:`types`
|
|
"""
|
|
if value in self.types:
|
|
self.xml.attrib['type'] = value
|
|
return self
|
|
|
|
def get_to(self):
|
|
"""Return the value of the stanza's ``'to'`` attribute."""
|
|
return JID(self._get_attr('to'))
|
|
|
|
def set_to(self, value):
|
|
"""Set the ``'to'`` attribute of the stanza.
|
|
|
|
:param value: A string or :class:`sleekxmpp.xmlstream.JID` object
|
|
representing the recipient's JID.
|
|
"""
|
|
return self._set_attr('to', str(value))
|
|
|
|
def get_from(self):
|
|
"""Return the value of the stanza's ``'from'`` attribute."""
|
|
return JID(self._get_attr('from'))
|
|
|
|
def set_from(self, value):
|
|
"""Set the 'from' attribute of the stanza.
|
|
|
|
Arguments:
|
|
from -- A string or JID object representing the sender's JID.
|
|
"""
|
|
return self._set_attr('from', str(value))
|
|
|
|
def get_payload(self):
|
|
"""Return a list of XML objects contained in the stanza."""
|
|
return self.xml.getchildren()
|
|
|
|
def set_payload(self, value):
|
|
"""Add XML content to the stanza.
|
|
|
|
:param value: Either an XML or a stanza object, or a list
|
|
of XML or stanza objects.
|
|
"""
|
|
if not isinstance(value, list):
|
|
value = [value]
|
|
for val in value:
|
|
self.append(val)
|
|
return self
|
|
|
|
def del_payload(self):
|
|
"""Remove the XML contents of the stanza."""
|
|
self.clear()
|
|
return self
|
|
|
|
def reply(self, clear=True):
|
|
"""Prepare the stanza for sending a reply.
|
|
|
|
Swaps the ``'from'`` and ``'to'`` attributes.
|
|
|
|
If ``clear=True``, then also remove the stanza's
|
|
contents to make room for the reply content.
|
|
|
|
For client streams, the ``'from'`` attribute is removed.
|
|
|
|
:param bool clear: Indicates if the stanza's contents should be
|
|
removed. Defaults to ``True``.
|
|
"""
|
|
# if it's a component, use from
|
|
if self.stream and hasattr(self.stream, "is_component") and \
|
|
self.stream.is_component:
|
|
self['from'], self['to'] = self['to'], self['from']
|
|
else:
|
|
self['to'] = self['from']
|
|
del self['from']
|
|
if clear:
|
|
self.clear()
|
|
return self
|
|
|
|
def error(self):
|
|
"""Set the stanza's type to ``'error'``."""
|
|
self['type'] = 'error'
|
|
return self
|
|
|
|
def unhandled(self):
|
|
"""Called if no handlers have been registered to process this stanza.
|
|
|
|
Meant to be overridden.
|
|
"""
|
|
pass
|
|
|
|
def exception(self, e):
|
|
"""Handle exceptions raised during stanza processing.
|
|
|
|
Meant to be overridden.
|
|
"""
|
|
log.exception('Error handling {%s}%s stanza', self.namespace,
|
|
self.name)
|
|
|
|
def send(self, now=False):
|
|
"""Queue the stanza to be sent on the XML stream.
|
|
|
|
:param bool now: Indicates if the queue should be skipped and the
|
|
stanza sent immediately. Useful for stream
|
|
initialization. Defaults to ``False``.
|
|
"""
|
|
self.stream.send(self, now=now)
|
|
|
|
def __copy__(self):
|
|
"""Return a copy of the stanza object that does not share the
|
|
same underlying XML object, but does share the same XML stream.
|
|
"""
|
|
return self.__class__(xml=copy.deepcopy(self.xml),
|
|
stream=self.stream)
|
|
|
|
def __str__(self, top_level_ns=False):
|
|
"""Serialize the stanza's XML to a string.
|
|
|
|
:param bool top_level_ns: Display the top-most namespace.
|
|
Defaults to ``False``.
|
|
"""
|
|
stanza_ns = '' if top_level_ns else self.namespace
|
|
return tostring(self.xml, xmlns='',
|
|
stanza_ns=stanza_ns,
|
|
stream=self.stream,
|
|
top_level=not top_level_ns)
|
|
|
|
|
|
#: A JSON/dictionary version of the XML content exposed through
|
|
#: the stanza interfaces::
|
|
#:
|
|
#: >>> msg = Message()
|
|
#: >>> msg.values
|
|
#: {'body': '', 'from': , 'mucnick': '', 'mucroom': '',
|
|
#: 'to': , 'type': 'normal', 'id': '', 'subject': ''}
|
|
#:
|
|
#: Likewise, assigning to the :attr:`values` will change the XML
|
|
#: content::
|
|
#:
|
|
#: >>> msg = Message()
|
|
#: >>> msg.values = {'body': 'Hi!', 'to': 'user@example.com'}
|
|
#: >>> msg
|
|
#: '<message to="user@example.com"><body>Hi!</body></message>'
|
|
#:
|
|
#: Child stanzas are exposed as nested dictionaries.
|
|
ElementBase.values = property(ElementBase._get_stanza_values,
|
|
ElementBase._set_stanza_values)
|
|
|
|
|
|
# To comply with PEP8, method names now use underscores.
|
|
# Deprecated method names are re-mapped for backwards compatibility.
|
|
ElementBase.initPlugin = ElementBase.init_plugin
|
|
ElementBase._getAttr = ElementBase._get_attr
|
|
ElementBase._setAttr = ElementBase._set_attr
|
|
ElementBase._delAttr = ElementBase._del_attr
|
|
ElementBase._getSubText = ElementBase._get_sub_text
|
|
ElementBase._setSubText = ElementBase._set_sub_text
|
|
ElementBase._delSub = ElementBase._del_sub
|
|
ElementBase.getStanzaValues = ElementBase._get_stanza_values
|
|
ElementBase.setStanzaValues = ElementBase._set_stanza_values
|
|
|
|
StanzaBase.setType = StanzaBase.set_type
|
|
StanzaBase.getTo = StanzaBase.get_to
|
|
StanzaBase.setTo = StanzaBase.set_to
|
|
StanzaBase.getFrom = StanzaBase.get_from
|
|
StanzaBase.setFrom = StanzaBase.set_from
|
|
StanzaBase.getPayload = StanzaBase.get_payload
|
|
StanzaBase.setPayload = StanzaBase.set_payload
|
|
StanzaBase.delPayload = StanzaBase.del_payload
|