a1ddd88208
The set of bool_interfaces provides default behaviour for
checking/setting the presence of empty subelements.
The prime example of this would be:
bool_interfaces = set(['required'])
This would mean that ``stanza['required']`` would return ``True`` for:
<stanza>
<required />
</stanza>
and ``False`` for:
<stanza />
Likewise, assigning ``stanza['required'] = True`` would add an empty
``<required />`` element, and setting it to ``False`` would remove
such an element if it exists.
1347 lines
49 KiB
Python
1347 lines
49 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 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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|
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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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#: A subset of :attr:`interfaces` which maps the presence of
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#: subelements to boolean values. Using this set allows for quickly
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#: checking for the existence of empty subelements like ``<required />``.
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#:
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#: .. versionadded:: 1.1
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bool_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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|
|
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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
|
|
#: parent stanza will be passed to the plugin directly.
|
|
#:
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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.
|
|
#: For example, after overriding the ``set`` operation for
|
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#: the interface ``body``, :attr:`plugin_overrides` would be::
|
|
#:
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|
#: {'set_body': <some function>}
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|
#:
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|
#: .. versionadded: 1.0-Beta5
|
|
plugin_overrides = {}
|
|
|
|
#: A mapping of the :attr:`plugin_attrib` values of registered
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|
#: plugins to their respective classes.
|
|
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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|
#: register_stanza_plugin(DiscoInfo, DiscoItem, iterable=True)
|
|
#:
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|
#: .. versionadded:: 1.0-Beta5
|
|
plugin_iterables = set()
|
|
|
|
#: A deprecated version of :attr:`plugin_iterables` that remains
|
|
#: for backward compatibility. It required a parent stanza to
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|
#: know beforehand what stanza classes would be iterable::
|
|
#:
|
|
#: class DiscoItem(ElementBase):
|
|
#: ...
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|
#:
|
|
#: class DiscoInfo(ElementBase):
|
|
#: subitem = (DiscoItem, )
|
|
#: ...
|
|
#:
|
|
#: .. deprecated:: 1.0-Beta5
|
|
subitem = set()
|
|
|
|
#: The default XML namespace: ``http://www.w3.org/XML/1998/namespace``.
|
|
xml_ns = 'http://www.w3.org/XML/1998/namespace'
|
|
|
|
def __init__(self, xml=None, parent=None):
|
|
self._index = 0
|
|
|
|
#: The underlying XML object for the stanza. It is a standard
|
|
#: :class:`xml.etree.cElementTree` object.
|
|
self.xml = xml
|
|
|
|
#: An ordered dictionary of plugin stanzas, mapped by their
|
|
#: :attr:`plugin_attrib` value.
|
|
self.plugins = OrderedDict()
|
|
|
|
#: A list of child stanzas whose class is included in
|
|
#: :attr:`plugin_iterables`.
|
|
self.iterables = []
|
|
|
|
#: The name of the tag for the stanza's root element. It is the
|
|
#: same as calling :meth:`tag_name()` and is formatted as
|
|
#: ``'{namespace}elementname'``.
|
|
self.tag = self.tag_name()
|
|
|
|
#: A :class:`weakref.weakref` to the parent stanza, if there is one.
|
|
#: If not, then :attr:`parent` is ``None``.
|
|
self.parent = None
|
|
if parent is not None:
|
|
self.parent = weakref.ref(parent)
|
|
|
|
if self.subitem is not None:
|
|
for sub in self.subitem:
|
|
self.plugin_iterables.add(sub)
|
|
|
|
if self.setup(xml):
|
|
# If we generated our own XML, then everything is ready.
|
|
return
|
|
|
|
# Initialize values using provided XML
|
|
for child in self.xml.getchildren():
|
|
if child.tag in self.plugin_tag_map:
|
|
plugin_class = self.plugin_tag_map[child.tag]
|
|
plugin = plugin_class(child, self)
|
|
self.plugins[plugin.plugin_attrib] = plugin
|
|
if plugin_class in self.plugin_iterables:
|
|
self.iterables.append(plugin)
|
|
|
|
def setup(self, xml=None):
|
|
"""Initialize the stanza's XML contents.
|
|
|
|
Will return ``True`` if XML was generated according to the stanza's
|
|
definition instead of building a stanza object from an existing
|
|
XML object.
|
|
|
|
:param xml: An existing XML object to use for the stanza's content
|
|
instead of generating new XML.
|
|
"""
|
|
if self.xml is None:
|
|
self.xml = xml
|
|
|
|
last_xml = self.xml
|
|
if self.xml is None:
|
|
# Generate XML from the stanza definition
|
|
for ename in self.name.split('/'):
|
|
new = ET.Element("{%s}%s" % (self.namespace, ename))
|
|
if self.xml is None:
|
|
self.xml = new
|
|
else:
|
|
last_xml.append(new)
|
|
last_xml = new
|
|
if self.parent is not None:
|
|
self.parent().xml.append(self.xml)
|
|
|
|
# We had to generate XML
|
|
return True
|
|
else:
|
|
# We did not generate XML
|
|
return False
|
|
|
|
def enable(self, attrib):
|
|
"""Enable and initialize a stanza plugin.
|
|
|
|
Alias for :meth:`init_plugin`.
|
|
|
|
:param string attrib: The :attr:`plugin_attrib` value of the
|
|
plugin to enable.
|
|
"""
|
|
return self.init_plugin(attrib)
|
|
|
|
def init_plugin(self, attrib):
|
|
"""Enable and initialize a stanza plugin.
|
|
|
|
:param string attrib: The :attr:`plugin_attrib` value of the
|
|
plugin to enable.
|
|
"""
|
|
if attrib not in self.plugins:
|
|
plugin_class = self.plugin_attrib_map[attrib]
|
|
existing_xml = self.xml.find(plugin_class.tag_name())
|
|
plugin = plugin_class(parent=self, xml=existing_xml)
|
|
self.plugins[attrib] = plugin
|
|
if plugin_class in self.plugin_iterables:
|
|
self.iterables.append(plugin)
|
|
return self
|
|
|
|
def _get_stanza_values(self):
|
|
"""Return A JSON/dictionary version of the XML content
|
|
exposed through the stanza's interfaces::
|
|
|
|
>>> msg = Message()
|
|
>>> msg.values
|
|
{'body': '', 'from': , 'mucnick': '', 'mucroom': '',
|
|
'to': , 'type': 'normal', 'id': '', 'subject': ''}
|
|
|
|
Likewise, assigning to :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>'
|
|
|
|
.. versionadded:: 1.0-Beta1
|
|
"""
|
|
values = {}
|
|
for interface in self.interfaces:
|
|
values[interface] = self[interface]
|
|
for plugin, stanza in self.plugins.items():
|
|
values[plugin] = stanza.values
|
|
if self.iterables:
|
|
iterables = []
|
|
for stanza in self.iterables:
|
|
iterables.append(stanza.values)
|
|
iterables[-1]['__childtag__'] = stanza.tag
|
|
values['substanzas'] = iterables
|
|
return values
|
|
|
|
def _set_stanza_values(self, values):
|
|
"""Set multiple stanza interface values using a dictionary.
|
|
|
|
Stanza plugin values may be set using nested dictionaries.
|
|
|
|
:param values: A dictionary mapping stanza interface with values.
|
|
Plugin interfaces may accept a nested dictionary that
|
|
will be used recursively.
|
|
|
|
.. versionadded:: 1.0-Beta1
|
|
"""
|
|
iterable_interfaces = [p.plugin_attrib for \
|
|
p in self.plugin_iterables]
|
|
|
|
for interface, value in values.items():
|
|
if interface == 'substanzas':
|
|
# Remove existing substanzas
|
|
for stanza in self.iterables:
|
|
self.xml.remove(stanza.xml)
|
|
self.iterables = []
|
|
|
|
# Add new substanzas
|
|
for subdict in value:
|
|
if '__childtag__' in subdict:
|
|
for subclass in self.plugin_iterables:
|
|
child_tag = "{%s}%s" % (subclass.namespace,
|
|
subclass.name)
|
|
if subdict['__childtag__'] == child_tag:
|
|
sub = subclass(parent=self)
|
|
sub.values = subdict
|
|
self.iterables.append(sub)
|
|
break
|
|
elif interface in self.interfaces:
|
|
self[interface] = value
|
|
elif interface in self.plugin_attrib_map:
|
|
if interface not in iterable_interfaces:
|
|
if interface not in self.plugins:
|
|
self.init_plugin(interface)
|
|
self.plugins[interface].values = value
|
|
return self
|
|
|
|
def __getitem__(self, attrib):
|
|
"""Return the value of a stanza interface using dict-like syntax.
|
|
|
|
Example::
|
|
|
|
>>> msg['body']
|
|
'Message contents'
|
|
|
|
Stanza interfaces are typically mapped directly to the underlying XML
|
|
object, but can be overridden by the presence of a ``get_attrib``
|
|
method (or ``get_foo`` where the interface is named ``'foo'``, etc).
|
|
|
|
The search order for interface value retrieval for an interface
|
|
named ``'foo'`` is:
|
|
|
|
1. The list of substanzas (``'substanzas'``)
|
|
2. The result of calling the ``get_foo`` override handler.
|
|
3. The result of calling ``get_foo``.
|
|
4. The result of calling ``getFoo``.
|
|
5. The contents of the ``foo`` subelement, if ``foo`` is listed
|
|
in :attr:`sub_interfaces`.
|
|
6. True or False depending on the existence of a ``foo``
|
|
subelement and ``foo`` is in :attr:`bool_interfaces`.
|
|
7. The value of the ``foo`` attribute of the XML object.
|
|
8. The plugin named ``'foo'``
|
|
9. An empty string.
|
|
|
|
:param string attrib: The name of the requested stanza interface.
|
|
"""
|
|
if attrib == 'substanzas':
|
|
return self.iterables
|
|
elif attrib in self.interfaces:
|
|
get_method = "get_%s" % attrib.lower()
|
|
get_method2 = "get%s" % attrib.title()
|
|
|
|
if self.plugin_overrides:
|
|
plugin = self.plugin_overrides.get(get_method, None)
|
|
if plugin:
|
|
if plugin not in self.plugins:
|
|
self.init_plugin(plugin)
|
|
handler = getattr(self.plugins[plugin], get_method, None)
|
|
if handler:
|
|
return handler()
|
|
|
|
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)
|
|
elif attrib in self.bool_interfaces:
|
|
elem = self.xml.find('{%s}%s' % (self.namespace, attrib))
|
|
return elem is not None
|
|
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. Add or remove an empty subelement ``foo``
|
|
if ``foo`` is in :attr:`bool_interfaces`.
|
|
7. Set the value of a top level XML attribute named ``foo``.
|
|
8. Attempt to pass the value to a plugin named ``'foo'`` using
|
|
the plugin's ``'foo'`` interface.
|
|
9. 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)
|
|
elif attrib in self.bool_interfaces:
|
|
if value:
|
|
return self._set_sub_text(attrib, '', keep=True)
|
|
else:
|
|
return self._set_sub_text(attrib, '', keep=False)
|
|
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. Remove ``foo`` element if ``'foo'`` is in
|
|
:attr:`bool_interfaces`.
|
|
6. Delete top level XML attribute named ``foo``.
|
|
7. Remove the ``foo`` plugin, if it was loaded.
|
|
8. 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)
|
|
elif attrib in self.bool_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 list(self.xml):
|
|
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
|