768 lines
28 KiB
Python
768 lines
28 KiB
Python
"""
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SleekXMPP: The Sleek XMPP Library
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Copyright (C) 2010 Nathanael C. Fritz
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This file is part of SleekXMPP.
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See the file LICENSE for copying permission.
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"""
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import logging
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class Roster(object):
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"""
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SleekXMPP's roster manager.
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The roster is divided into "nodes", where each node is responsible
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for a single JID. While the distinction is not strictly necessary
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for client connections, it is a necessity for components that use
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multiple JIDs.
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Rosters may be stored and persisted in an external datastore. An
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interface object to the datastore that loads and saves roster items may
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be provided. See the documentation for the RosterItem class for the
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methods that the datastore interface object must provide.
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Attributes:
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xmpp -- The main SleekXMPP instance.
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db -- Optional interface object to an external datastore.
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auto_authorize -- Default auto_authorize value for new roster nodes.
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Defaults to True.
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auto_subscribe -- Default auto_subscribe value for new roster nodes.
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Defaults to True.
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Methods:
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add -- Create a new roster node for a JID.
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"""
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def __init__(self, xmpp, db=None):
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"""
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Create a new roster.
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Arguments:
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xmpp -- The main SleekXMPP instance.
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db -- Optional interface object to a datastore.
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"""
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self.xmpp = xmpp
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self.db = db
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self.auto_authorize = True
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self.auto_subscribe = True
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self._rosters = {}
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if self.db:
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for node in self.db.entries(None, {}):
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self.add(node)
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def __getitem__(self, key):
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"""
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Return the roster node for a JID.
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A new roster node will be created if one
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does not already exist.
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Arguments:
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key -- Return the roster for this JID.
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"""
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if not isinstance(key, str):
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key = key.bare
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if key not in self._rosters:
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self.add(key)
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self._rosters[key].auto_authorize = self.auto_authorize
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self._rosters[key].auto_subscribe = self.auto_subscribe
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return self._rosters[key]
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def keys(self):
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"""Return the JIDs managed by the roster."""
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return self._rosters.keys()
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def __iter__(self):
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"""Iterate over the roster nodes."""
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return self._rosters.__iter__()
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def add(self, node):
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"""
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Add a new roster node for the given JID.
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Arguments:
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node -- The JID for the new roster node.
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"""
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if not isinstance(node, str):
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node = node.bare
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if node not in self._rosters:
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self._rosters[node] = RosterNode(self.xmpp, node, self.db)
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def set_backend(self, db=None):
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"""
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Set the datastore interface object for the roster.
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Arguments:
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db -- The new datastore interface.
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"""
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self.db = db
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for node in self.db.entries(None, {}):
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self.add(node)
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for node in self._rosters:
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self._rosters[node].set_backend(db)
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def reset(self):
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"""
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Reset the state of the roster to forget any current
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presence information. Useful after a disconnection occurs.
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"""
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for node in self:
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self[node].reset()
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class RosterNode(object):
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"""
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A roster node is a roster for a single JID.
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Attributes:
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xmpp -- The main SleekXMPP instance.
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jid -- The JID that owns the roster node.
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db -- Optional interface to an external datastore.
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auto_authorize -- Determines how authorizations are handled:
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True -- Accept all subscriptions.
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False -- Reject all subscriptions.
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None -- Subscriptions must be
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manually authorized.
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Defaults to True.
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auto_subscribe -- Determines if bi-directional subscriptions
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are created after automatically authrorizing
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a subscription request.
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Defaults to True
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Methods:
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add -- Add a JID to the roster.
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update -- Update a JID's subscription information.
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subscribe -- Subscribe to a JID.
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unsubscribe -- Unsubscribe from a JID.
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remove -- Remove a JID from the roster.
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presence -- Return presence information for a JID's resources.
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"""
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def __init__(self, xmpp, jid, db=None):
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"""
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Create a roster node for a JID.
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Arguments:
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xmpp -- The main SleekXMPP instance.
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jid -- The JID that owns the roster.
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db -- Optional interface to an external datastore.
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"""
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self.xmpp = xmpp
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self.jid = jid
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self.db = db
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self.auto_authorize = True
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self.auto_subscribe = True
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self._jids = {}
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if self.db:
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for jid in self.db.entries(self.jid):
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self.add(jid)
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def __getitem__(self, key):
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"""
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Return the roster item for a subscribed JID.
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A new item entry will be created if one does not already exist.
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"""
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if not isinstance(key, str):
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key = key.bare
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if key not in self._jids:
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self.add(key, save=True)
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return self._jids[key]
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def keys(self):
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"""Return a list of all subscribed JIDs."""
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return self._jids.keys()
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def has_jid(self, jid):
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"""Returns whether the roster has a JID."""
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return jid in self._jids
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def __iter__(self):
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"""Iterate over the roster items."""
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return self._jids.__iter__()
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def set_backend(self, db=None):
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"""
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Set the datastore interface object for the roster node.
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Arguments:
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db -- The new datastore interface.
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"""
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self.db = db
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for jid in self.db.entries(self.jid):
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self.add(jid)
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for jid in self._jids:
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self._jids[jid].set_backend(db)
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def add(self, jid, name='', groups=None, afrom=False, ato=False,
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pending_in=False, pending_out=False, whitelisted=False,
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save=False):
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"""
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Add a new roster item entry.
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Arguments:
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jid -- The JID for the roster item.
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name -- An alias for the JID.
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groups -- A list of group names.
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afrom -- Indicates if the JID has a subscription state
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of 'from'. Defaults to False.
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ato -- Indicates if the JID has a subscription state
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of 'to'. Defaults to False.
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pending_in -- Indicates if the JID has sent a subscription
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request to this connection's JID.
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Defaults to False.
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pending_out -- Indicates if a subscription request has been sent
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to this JID.
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Defaults to False.
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whitelisted -- Indicates if a subscription request from this JID
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should be automatically authorized.
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Defaults to False.
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save -- Indicates if the item should be persisted
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immediately to an external datastore,
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if one is used.
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Defaults to False.
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"""
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if not isinstance(jid, str):
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key = jid.bare
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state = {'name': name,
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'groups': groups or [],
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'from': afrom,
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'to': ato,
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'pending_in': pending_in,
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'pending_out': pending_out,
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'whitelisted': whitelisted,
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'subscription': 'none'}
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self._jids[jid] = RosterItem(self.xmpp, jid, self.jid,
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state=state, db=self.db)
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if save:
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self._jids[jid].save()
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def subscribe(self, jid):
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"""
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Subscribe to the given JID.
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Arguments:
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jid -- The JID to subscribe to.
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"""
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self[jid].subscribe()
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def unsubscribe(self, jid):
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"""
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Unsubscribe from the given JID.
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Arguments:
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jid -- The JID to unsubscribe from.
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"""
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self[jid].unsubscribe()
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def remove(self, jid):
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"""
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Remove a JID from the roster.
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Arguments:
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jid -- The JID to remove.
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"""
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self[jid].remove()
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if not self.xmpp.is_component:
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self.update(jid, subscription='remove')
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def update(self, jid, name=None, subscription=None, groups=[]):
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"""
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Update a JID's subscription information.
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Arguments:
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jid -- The JID to update.
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name -- Optional alias for the JID.
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subscription -- The subscription state. May be one of: 'to',
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'from', 'both', 'none', or 'remove'.
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groups -- A list of group names.
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"""
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self[jid]['name'] = name
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self[jid]['groups'] = group
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self[jid].save()
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if not self.xmpp.is_component:
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iq = self.Iq()
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iq['type'] = 'set'
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iq['roster']['items'] = {jid: {'name': name,
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'subscription': subscription,
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'groups': groups}}
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response = iq.send()
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return response and response['type'] == 'result'
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def presence(self, jid, resource=None):
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"""
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Retrieve the presence information of a JID.
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May return either all online resources' status, or
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a single resource's status.
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Arguments:
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jid -- The JID to lookup.
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resource -- Optional resource for returning
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only the status of a single connection.
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"""
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if resource is None:
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return self[jid].resources
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default_presence = {'status': '',
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'priority': 0,
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'show': ''}
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return self[jid].resources.get(resource,
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default_presence)
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def reset(self):
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"""
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Reset the state of the roster to forget any current
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presence information. Useful after a disconnection occurs.
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"""
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for jid in self:
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self[jid].reset()
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class RosterItem(object):
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"""
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A RosterItem is a single entry in a roster node, and tracks
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the subscription state and user annotations of a single JID.
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Roster items may use an external datastore to persist roster data
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across sessions. Client applications will not need to use this
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functionality, but is intended for components that do not have their
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roster persisted automatically by the XMPP server.
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Roster items provide many methods for handling incoming presence
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stanzas that ensure that response stanzas are sent according to
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RFC 3921.
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The external datastore is accessed through a provided interface
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object which is stored in self.db. The interface object MUST
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provide two methods: load and save, both of which are responsible
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for working with a single roster item. A private dictionary,
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self._db_state, is used to store any metadata needed by the
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interface, such as the row ID of a roster item, etc.
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Interface for self.db.load:
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load(owner_jid, jid, db_state):
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owner_jid -- The JID that owns the roster.
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jid -- The JID of the roster item.
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db_state -- A dictionary containing any data saved
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by the interface object after a save()
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call. Will typically have the equivalent
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of a 'row_id' value.
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Interface for self.db.save:
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save(owner_jid, jid, item_state, db_state):
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owner_jid -- The JID that owns the roster.
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jid -- The JID of the roster item.
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item_state -- A dictionary containing the fields:
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'from', 'to', 'pending_in', 'pending_out',
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'whitelisted', 'subscription', 'name',
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and 'groups'.
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db_state -- A dictionary provided for persisting
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datastore specific information. Typically,
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a value equivalent to 'row_id' will be
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stored here.
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State Fields:
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from -- Indicates if a subscription of type 'from'
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has been authorized.
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to -- Indicates if a subscription of type 'to' has
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been authorized.
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pending_in -- Indicates if a subscription request has been
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received from this JID and it has not been
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authorized yet.
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pending_out -- Indicates if a subscription request has been sent
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to this JID and it has not been accepted yet.
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subscription -- Returns one of: 'to', 'from', 'both', or 'none'
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based on the states of from, to, pending_in,
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and pending_out. Assignment to this value does
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not affect the states of the other values.
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whitelisted -- Indicates if a subscription request from this
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JID should be automatically accepted.
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name -- A user supplied alias for the JID.
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groups -- A list of group names for the JID.
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Attributes:
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xmpp -- The main SleekXMPP instance.
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owner -- The JID that owns the roster.
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jid -- The JID for the roster item.
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db -- Optional datastore interface object.
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last_status -- The last presence sent to this JID.
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resources -- A dictionary of online resources for this JID.
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Will contain the fields 'show', 'status',
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and 'priority'.
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Methods:
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load -- Retrieve the roster item from an
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external datastore, if one was provided.
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save -- Save the roster item to an external
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datastore, if one was provided.
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remove -- Remove a subscription to the JID and revoke
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its whitelisted status.
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subscribe -- Subscribe to the JID.
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authorize -- Accept a subscription from the JID.
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unauthorize -- Deny a subscription from the JID.
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unsubscribe -- Unsubscribe from the JID.
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send_presence -- Send a directed presence to the JID.
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send_last_presence -- Resend the last sent presence.
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handle_available -- Update the JID's resource information.
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handle_unavailable -- Update the JID's resource information.
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handle_subscribe -- Handle a subscription request.
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handle_subscribed -- Handle a notice that a subscription request
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was authorized by the JID.
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handle_unsubscribe -- Handle an unsubscribe request.
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handle_unsubscribed -- Handle a notice that a subscription was
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removed by the JID.
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handle_probe -- Handle a presence probe query.
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"""
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def __init__(self, xmpp, jid, owner=None,
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state=None, db=None):
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"""
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Create a new roster item.
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Arguments:
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xmpp -- The main SleekXMPP instance.
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jid -- The item's JID.
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owner -- The roster owner's JID. Defaults
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so self.xmpp.boundjid.bare.
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state -- A dictionary of initial state values.
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db -- An optional interface to an external datastore.
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"""
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self.xmpp = xmpp
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self.jid = jid
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self.owner = owner or self.xmpp.boundjid.bare
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self.last_status = None
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self.resources = {}
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self.db = db
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self._state = state or {
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'from': False,
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'to': False,
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'pending_in': False,
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'pending_out': False,
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'whitelisted': False,
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'subscription': 'none',
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'name': '',
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'groups': []}
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self._db_state = {}
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self.load()
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def set_backend(self, db=None):
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"""
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Set the datastore interface object for the roster item.
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Arguments:
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db -- The new datastore interface.
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"""
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self.db = db
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self.load()
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def load(self):
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"""
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Load the item's state information from an external datastore,
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if one has been provided.
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"""
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if self.db:
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item = self.db.load(self.owner, self.jid,
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self._db_state)
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if item:
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self['name'] = item['name']
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self['groups'] = item['groups']
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self['from'] = item['from']
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self['to'] = item['to']
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self['whitelisted'] = item['whitelisted']
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self['pending_out'] = item['pending_out']
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self['pending_in'] = item['pending_in']
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self['subscription'] = self._subscription()
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return self._state
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return None
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def save(self):
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"""
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Save the item's state information to an external datastore,
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if one has been provided.
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"""
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if self.db:
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self.db.save(self.owner, self.jid,
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self._state, self._db_state)
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def __getitem__(self, key):
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"""Return a state field's value."""
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if key in self._state:
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if key == 'subscription':
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return self._subscription()
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return self._state[key]
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else:
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raise KeyError
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def __setitem__(self, key, value):
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"""
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Set the value of a state field.
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For boolean states, the values True, 'true', '1', 'on',
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and 'yes' are accepted as True; all others are False.
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Arguments:
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key -- The state field to modify.
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value -- The new value of the state field.
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"""
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if key in self._state:
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if key in ['name', 'subscription', 'groups']:
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self._state[key] = value
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else:
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value = str(value).lower()
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self._state[key] = value in ('true', '1', 'on', 'yes')
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else:
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raise KeyError
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def _subscription(self):
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"""Return the proper subscription type based on current state."""
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if self['to'] and self['from']:
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return 'both'
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elif self['from']:
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return 'from'
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elif self['to']:
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return 'to'
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else:
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return 'none'
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def remove(self):
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"""
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Remove a JID's whitelisted status and unsubscribe if a
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subscription exists.
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"""
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if self['to']:
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p = self.xmpp.Presence()
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p['to'] = self.jid
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p['type'] = ['unsubscribe']
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if self.xmpp.is_component:
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p['from'] = self.owner
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p.send()
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self['to'] = False
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self['whitelisted'] = False
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self.save()
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def subscribe(self):
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"""Send a subscription request to the JID."""
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p = self.xmpp.Presence()
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p['to'] = self.jid
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p['type'] = 'subscribe'
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if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
self['pending_out'] = True
|
|
self.save()
|
|
p.send()
|
|
|
|
def authorize(self):
|
|
"""Authorize a received subscription request from the JID."""
|
|
self['from'] = True
|
|
self['pending_in'] = False
|
|
self.save()
|
|
self._subscribed()
|
|
self.send_last_presence()
|
|
|
|
def unauthorize(self):
|
|
"""Deny a received subscription request from the JID."""
|
|
self['from'] = False
|
|
self['pending_in'] = False
|
|
self.save()
|
|
self._unsubscribed()
|
|
p = self.xmpp.Presence()
|
|
p['to'] = self.jid
|
|
p['type'] = 'unavailable'
|
|
if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
p.send()
|
|
|
|
def _subscribed(self):
|
|
"""Handle acknowledging a subscription."""
|
|
p = self.xmpp.Presence()
|
|
p['to'] = self.jid
|
|
p['type'] = 'subscribed'
|
|
if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
p.send()
|
|
|
|
def unsubscribe(self):
|
|
"""Unsubscribe from the JID."""
|
|
p = self.xmpp.Presence()
|
|
p['to'] = self.jid
|
|
p['type'] = 'unsubscribe'
|
|
if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
self.save()
|
|
p.send()
|
|
|
|
def _unsubscribed(self):
|
|
"""Handle acknowledging an unsubscribe request."""
|
|
p = self.xmpp.Presence()
|
|
p['to'] = self.jid
|
|
p['type'] = 'unsubscribed'
|
|
if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
p.send()
|
|
|
|
def send_presence(self, ptype='available', status=None):
|
|
p = self.xmpp.Presence()
|
|
p['to'] = self.jid
|
|
p['type'] = ptype
|
|
p['status'] = status
|
|
if self.xmpp.is_component:
|
|
p['from'] = self.owner
|
|
self.last_status = p
|
|
p.send()
|
|
|
|
def send_last_presence(self):
|
|
if self.last_status is None:
|
|
self.send_presence()
|
|
else:
|
|
self.last_status.send()
|
|
|
|
def handle_available(self, presence):
|
|
resource = presence['from'].resource
|
|
data = {'status': presence['status'],
|
|
'show': presence['show'],
|
|
'priority': presence['priority']}
|
|
if not self.resources:
|
|
self.xmpp.event('got_online', presence)
|
|
if resource not in self.resources:
|
|
self.resources[resource] = {}
|
|
self.resources[resource].update(data)
|
|
|
|
def handle_unavailable(self, presence):
|
|
resource = presence['from'].resource
|
|
if not self.resources:
|
|
return
|
|
if resource in self.resources:
|
|
del self.resources[resource]
|
|
if not self.resources:
|
|
self.xmpp.event('got_offline', presence)
|
|
|
|
def handle_subscribe(self, presence):
|
|
"""
|
|
+------------------------------------------------------------------+
|
|
| EXISTING STATE | DELIVER? | NEW STATE |
|
|
+------------------------------------------------------------------+
|
|
| "None" | yes | "None + Pending In" |
|
|
| "None + Pending Out" | yes | "None + Pending Out/In" |
|
|
| "None + Pending In" | no | no state change |
|
|
| "None + Pending Out/In" | no | no state change |
|
|
| "To" | yes | "To + Pending In" |
|
|
| "To + Pending In" | no | no state change |
|
|
| "From" | no * | no state change |
|
|
| "From + Pending Out" | no * | no state change |
|
|
| "Both" | no * | no state change |
|
|
+------------------------------------------------------------------+
|
|
"""
|
|
if self.xmpp.is_component:
|
|
if not self['from'] and not self['pending_in']:
|
|
self['pending_in'] = True
|
|
self.xmpp.event('roster_subscription_request', presence)
|
|
elif self['from']:
|
|
self._subscribed()
|
|
self.save()
|
|
else:
|
|
#server shouldn't send an invalid subscription request
|
|
self.xmpp.event('roster_subscription_request', presence)
|
|
|
|
def handle_subscribed(self, presence):
|
|
"""
|
|
+------------------------------------------------------------------+
|
|
| EXISTING STATE | DELIVER? | NEW STATE |
|
|
+------------------------------------------------------------------+
|
|
| "None" | no | no state change |
|
|
| "None + Pending Out" | yes | "To" |
|
|
| "None + Pending In" | no | no state change |
|
|
| "None + Pending Out/In" | yes | "To + Pending In" |
|
|
| "To" | no | no state change |
|
|
| "To + Pending In" | no | no state change |
|
|
| "From" | no | no state change |
|
|
| "From + Pending Out" | yes | "Both" |
|
|
| "Both" | no | no state change |
|
|
+------------------------------------------------------------------+
|
|
"""
|
|
if self.xmpp.is_component:
|
|
if not self['to'] and self['pending_out']:
|
|
self['pending_out'] = False
|
|
self['to'] = True
|
|
self.xmpp.event('roster_subscription_authorized', presence)
|
|
self.save()
|
|
else:
|
|
self.xmpp.event('roster_subscription_authorized', presence)
|
|
|
|
def handle_unsubscribe(self, presence):
|
|
"""
|
|
+------------------------------------------------------------------+
|
|
| EXISTING STATE | DELIVER? | NEW STATE |
|
|
+------------------------------------------------------------------+
|
|
| "None" | no | no state change |
|
|
| "None + Pending Out" | no | no state change |
|
|
| "None + Pending In" | yes * | "None" |
|
|
| "None + Pending Out/In" | yes * | "None + Pending Out" |
|
|
| "To" | no | no state change |
|
|
| "To + Pending In" | yes * | "To" |
|
|
| "From" | yes * | "None" |
|
|
| "From + Pending Out" | yes * | "None + Pending Out |
|
|
| "Both" | yes * | "To" |
|
|
+------------------------------------------------------------------+
|
|
"""
|
|
if self.xmpp.is_component:
|
|
if not self['from'] and self['pending_in']:
|
|
self['pending_in'] = False
|
|
self._unsubscribed()
|
|
elif self['from']:
|
|
self['from'] = False
|
|
self._unsubscribed()
|
|
self.xmpp.event('roster_subscription_remove', presence)
|
|
self.save()
|
|
else:
|
|
self.xmpp.event('roster_subscription_remove', presence)
|
|
|
|
def handle_unsubscribed(self, presence):
|
|
"""
|
|
+------------------------------------------------------------------+
|
|
| EXISTING STATE | DELIVER? | NEW STATE |
|
|
+------------------------------------------------------------------+
|
|
| "None" | no | no state change |
|
|
| "None + Pending Out" | yes | "None" |
|
|
| "None + Pending In" | no | no state change |
|
|
| "None + Pending Out/In" | yes | "None + Pending In" |
|
|
| "To" | yes | "None" |
|
|
| "To + Pending In" | yes | "None + Pending In" |
|
|
| "From" | no | no state change |
|
|
| "From + Pending Out" | yes | "From" |
|
|
| "Both" | yes | "From" |
|
|
+------------------------------------------------------------------
|
|
"""
|
|
if self.xmpp.is_component:
|
|
if not self['to'] and self['pending_out']:
|
|
self['pending_out'] = False
|
|
elif self['to'] and not self['pending_out']:
|
|
self['to'] = False
|
|
self.xmpp.event('roster_subscription_removed', presence)
|
|
self.save()
|
|
else:
|
|
self.xmpp.event('roster_subscription_removed', presence)
|
|
|
|
def handle_probe(self, presence):
|
|
if self['to']:
|
|
self.send_last_presence()
|
|
if self['pending_out']:
|
|
self.subscribe()
|
|
if not self['to']:
|
|
self._unsubscribed()
|
|
|
|
def reset(self):
|
|
"""
|
|
Forgot current resource presence information as part of
|
|
a roster reset request.
|
|
"""
|
|
self.resources = {}
|