638 lines
18 KiB
Python
638 lines
18 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
sleekxmpp.jid
|
|
~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This module allows for working with Jabber IDs (JIDs).
|
|
|
|
Part of SleekXMPP: The Sleek XMPP Library
|
|
|
|
:copyright: (c) 2011 Nathanael C. Fritz
|
|
:license: MIT, see LICENSE for more details
|
|
"""
|
|
|
|
from __future__ import unicode_literals
|
|
|
|
import re
|
|
import socket
|
|
import stringprep
|
|
import threading
|
|
import encodings.idna
|
|
|
|
from copy import deepcopy
|
|
|
|
from sleekxmpp.util import stringprep_profiles
|
|
from sleekxmpp.thirdparty import OrderedDict
|
|
|
|
#: These characters are not allowed to appear in a JID.
|
|
ILLEGAL_CHARS = '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r' + \
|
|
'\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19' + \
|
|
'\x1a\x1b\x1c\x1d\x1e\x1f' + \
|
|
' !"#$%&\'()*+,./:;<=>?@[\\]^_`{|}~\x7f'
|
|
|
|
#: The basic regex pattern that a JID must match in order to determine
|
|
#: the local, domain, and resource parts. This regex does NOT do any
|
|
#: validation, which requires application of nodeprep, resourceprep, etc.
|
|
JID_PATTERN = re.compile(
|
|
"^(?:([^\"&'/:<>@]{1,1023})@)?([^/@]{1,1023})(?:/(.{1,1023}))?$"
|
|
)
|
|
|
|
#: The set of escape sequences for the characters not allowed by nodeprep.
|
|
JID_ESCAPE_SEQUENCES = set(['\\20', '\\22', '\\26', '\\27', '\\2f',
|
|
'\\3a', '\\3c', '\\3e', '\\40', '\\5c'])
|
|
|
|
#: A mapping of unallowed characters to their escape sequences. An escape
|
|
#: sequence for '\' is also included since it must also be escaped in
|
|
#: certain situations.
|
|
JID_ESCAPE_TRANSFORMATIONS = {' ': '\\20',
|
|
'"': '\\22',
|
|
'&': '\\26',
|
|
"'": '\\27',
|
|
'/': '\\2f',
|
|
':': '\\3a',
|
|
'<': '\\3c',
|
|
'>': '\\3e',
|
|
'@': '\\40',
|
|
'\\': '\\5c'}
|
|
|
|
#: The reverse mapping of escape sequences to their original forms.
|
|
JID_UNESCAPE_TRANSFORMATIONS = {'\\20': ' ',
|
|
'\\22': '"',
|
|
'\\26': '&',
|
|
'\\27': "'",
|
|
'\\2f': '/',
|
|
'\\3a': ':',
|
|
'\\3c': '<',
|
|
'\\3e': '>',
|
|
'\\40': '@',
|
|
'\\5c': '\\'}
|
|
|
|
JID_CACHE = OrderedDict()
|
|
JID_CACHE_LOCK = threading.Lock()
|
|
JID_CACHE_MAX_SIZE = 1024
|
|
|
|
def _cache(key, parts, locked):
|
|
JID_CACHE[key] = (parts, locked)
|
|
if len(JID_CACHE) > JID_CACHE_MAX_SIZE:
|
|
with JID_CACHE_LOCK:
|
|
while len(JID_CACHE) > JID_CACHE_MAX_SIZE:
|
|
found = None
|
|
for key, item in JID_CACHE.items():
|
|
if not item[1]: # if not locked
|
|
found = key
|
|
break
|
|
if not found: # more than MAX_SIZE locked
|
|
# warn?
|
|
break
|
|
del JID_CACHE[found]
|
|
|
|
# pylint: disable=c0103
|
|
#: The nodeprep profile of stringprep used to validate the local,
|
|
#: or username, portion of a JID.
|
|
nodeprep = stringprep_profiles.create(
|
|
nfkc=True,
|
|
bidi=True,
|
|
mappings=[
|
|
stringprep_profiles.b1_mapping,
|
|
stringprep.map_table_b2],
|
|
prohibited=[
|
|
stringprep.in_table_c11,
|
|
stringprep.in_table_c12,
|
|
stringprep.in_table_c21,
|
|
stringprep.in_table_c22,
|
|
stringprep.in_table_c3,
|
|
stringprep.in_table_c4,
|
|
stringprep.in_table_c5,
|
|
stringprep.in_table_c6,
|
|
stringprep.in_table_c7,
|
|
stringprep.in_table_c8,
|
|
stringprep.in_table_c9,
|
|
lambda c: c in ' \'"&/:<>@'],
|
|
unassigned=[stringprep.in_table_a1])
|
|
|
|
# pylint: disable=c0103
|
|
#: The resourceprep profile of stringprep, which is used to validate
|
|
#: the resource portion of a JID.
|
|
resourceprep = stringprep_profiles.create(
|
|
nfkc=True,
|
|
bidi=True,
|
|
mappings=[stringprep_profiles.b1_mapping],
|
|
prohibited=[
|
|
stringprep.in_table_c12,
|
|
stringprep.in_table_c21,
|
|
stringprep.in_table_c22,
|
|
stringprep.in_table_c3,
|
|
stringprep.in_table_c4,
|
|
stringprep.in_table_c5,
|
|
stringprep.in_table_c6,
|
|
stringprep.in_table_c7,
|
|
stringprep.in_table_c8,
|
|
stringprep.in_table_c9],
|
|
unassigned=[stringprep.in_table_a1])
|
|
|
|
|
|
def _parse_jid(data):
|
|
"""
|
|
Parse string data into the node, domain, and resource
|
|
components of a JID, if possible.
|
|
|
|
:param string data: A string that is potentially a JID.
|
|
|
|
:raises InvalidJID:
|
|
|
|
:returns: tuple of the validated local, domain, and resource strings
|
|
"""
|
|
match = JID_PATTERN.match(data)
|
|
if not match:
|
|
raise InvalidJID('JID could not be parsed')
|
|
|
|
(node, domain, resource) = match.groups()
|
|
|
|
node = _validate_node(node)
|
|
domain = _validate_domain(domain)
|
|
resource = _validate_resource(resource)
|
|
|
|
return node, domain, resource
|
|
|
|
|
|
def _validate_node(node):
|
|
"""Validate the local, or username, portion of a JID.
|
|
|
|
:raises InvalidJID:
|
|
|
|
:returns: The local portion of a JID, as validated by nodeprep.
|
|
"""
|
|
try:
|
|
if node is not None:
|
|
node = nodeprep(node)
|
|
|
|
if not node:
|
|
raise InvalidJID('Localpart must not be 0 bytes')
|
|
if len(node) > 1023:
|
|
raise InvalidJID('Localpart must be less than 1024 bytes')
|
|
return node
|
|
except stringprep_profiles.StringPrepError:
|
|
raise InvalidJID('Invalid local part')
|
|
|
|
|
|
def _validate_domain(domain):
|
|
"""Validate the domain portion of a JID.
|
|
|
|
IP literal addresses are left as-is, if valid. Domain names
|
|
are stripped of any trailing label separators (`.`), and are
|
|
checked with the nameprep profile of stringprep. If the given
|
|
domain is actually a punyencoded version of a domain name, it
|
|
is converted back into its original Unicode form. Domains must
|
|
also not start or end with a dash (`-`).
|
|
|
|
:raises InvalidJID:
|
|
|
|
:returns: The validated domain name
|
|
"""
|
|
ip_addr = False
|
|
|
|
# First, check if this is an IPv4 address
|
|
try:
|
|
socket.inet_aton(domain)
|
|
ip_addr = True
|
|
except socket.error:
|
|
pass
|
|
|
|
# Check if this is an IPv6 address
|
|
if not ip_addr and hasattr(socket, 'inet_pton'):
|
|
try:
|
|
socket.inet_pton(socket.AF_INET6, domain.strip('[]'))
|
|
domain = '[%s]' % domain.strip('[]')
|
|
ip_addr = True
|
|
except (socket.error, ValueError):
|
|
pass
|
|
|
|
if not ip_addr:
|
|
# This is a domain name, which must be checked further
|
|
|
|
if domain and domain[-1] == '.':
|
|
domain = domain[:-1]
|
|
|
|
domain_parts = []
|
|
for label in domain.split('.'):
|
|
try:
|
|
label = encodings.idna.nameprep(label)
|
|
encodings.idna.ToASCII(label)
|
|
pass_nameprep = True
|
|
except UnicodeError:
|
|
pass_nameprep = False
|
|
|
|
if not pass_nameprep:
|
|
raise InvalidJID('Could not encode domain as ASCII')
|
|
|
|
if label.startswith('xn--'):
|
|
label = encodings.idna.ToUnicode(label)
|
|
|
|
for char in label:
|
|
if char in ILLEGAL_CHARS:
|
|
raise InvalidJID('Domain contains illegal characters')
|
|
|
|
if '-' in (label[0], label[-1]):
|
|
raise InvalidJID('Domain started or ended with -')
|
|
|
|
domain_parts.append(label)
|
|
domain = '.'.join(domain_parts)
|
|
|
|
if not domain:
|
|
raise InvalidJID('Domain must not be 0 bytes')
|
|
if len(domain) > 1023:
|
|
raise InvalidJID('Domain must be less than 1024 bytes')
|
|
|
|
return domain
|
|
|
|
|
|
def _validate_resource(resource):
|
|
"""Validate the resource portion of a JID.
|
|
|
|
:raises InvalidJID:
|
|
|
|
:returns: The local portion of a JID, as validated by resourceprep.
|
|
"""
|
|
try:
|
|
if resource is not None:
|
|
resource = resourceprep(resource)
|
|
|
|
if not resource:
|
|
raise InvalidJID('Resource must not be 0 bytes')
|
|
if len(resource) > 1023:
|
|
raise InvalidJID('Resource must be less than 1024 bytes')
|
|
return resource
|
|
except stringprep_profiles.StringPrepError:
|
|
raise InvalidJID('Invalid resource')
|
|
|
|
|
|
def _escape_node(node):
|
|
"""Escape the local portion of a JID."""
|
|
result = []
|
|
|
|
for i, char in enumerate(node):
|
|
if char == '\\':
|
|
if ''.join((node[i:i+3])) in JID_ESCAPE_SEQUENCES:
|
|
result.append('\\5c')
|
|
continue
|
|
result.append(char)
|
|
|
|
for i, char in enumerate(result):
|
|
if char != '\\':
|
|
result[i] = JID_ESCAPE_TRANSFORMATIONS.get(char, char)
|
|
|
|
escaped = ''.join(result)
|
|
|
|
if escaped.startswith('\\20') or escaped.endswith('\\20'):
|
|
raise InvalidJID('Escaped local part starts or ends with "\\20"')
|
|
|
|
_validate_node(escaped)
|
|
|
|
return escaped
|
|
|
|
|
|
def _unescape_node(node):
|
|
"""Unescape a local portion of a JID.
|
|
|
|
.. note::
|
|
The unescaped local portion is meant ONLY for presentation,
|
|
and should not be used for other purposes.
|
|
"""
|
|
unescaped = []
|
|
seq = ''
|
|
for i, char in enumerate(node):
|
|
if char == '\\':
|
|
seq = node[i:i+3]
|
|
if seq not in JID_ESCAPE_SEQUENCES:
|
|
seq = ''
|
|
if seq:
|
|
if len(seq) == 3:
|
|
unescaped.append(JID_UNESCAPE_TRANSFORMATIONS.get(seq, char))
|
|
|
|
# Pop character off the escape sequence, and ignore it
|
|
seq = seq[1:]
|
|
else:
|
|
unescaped.append(char)
|
|
unescaped = ''.join(unescaped)
|
|
|
|
return unescaped
|
|
|
|
|
|
def _format_jid(local=None, domain=None, resource=None):
|
|
"""Format the given JID components into a full or bare JID.
|
|
|
|
:param string local: Optional. The local portion of the JID.
|
|
:param string domain: Required. The domain name portion of the JID.
|
|
:param strin resource: Optional. The resource portion of the JID.
|
|
|
|
:return: A full or bare JID string.
|
|
"""
|
|
result = []
|
|
if local:
|
|
result.append(local)
|
|
result.append('@')
|
|
if domain:
|
|
result.append(domain)
|
|
if resource:
|
|
result.append('/')
|
|
result.append(resource)
|
|
return ''.join(result)
|
|
|
|
|
|
class InvalidJID(ValueError):
|
|
"""
|
|
Raised when attempting to create a JID that does not pass validation.
|
|
|
|
It can also be raised if modifying an existing JID in such a way as
|
|
to make it invalid, such trying to remove the domain from an existing
|
|
full JID while the local and resource portions still exist.
|
|
"""
|
|
|
|
# pylint: disable=R0903
|
|
class UnescapedJID(object):
|
|
|
|
"""
|
|
.. versionadded:: 1.1.10
|
|
"""
|
|
|
|
def __init__(self, local, domain, resource):
|
|
self._jid = (local, domain, resource)
|
|
|
|
# pylint: disable=R0911
|
|
def __getattr__(self, name):
|
|
"""Retrieve the given JID component.
|
|
|
|
:param name: one of: user, server, domain, resource,
|
|
full, or bare.
|
|
"""
|
|
if name == 'resource':
|
|
return self._jid[2] or ''
|
|
elif name in ('user', 'username', 'local', 'node'):
|
|
return self._jid[0] or ''
|
|
elif name in ('server', 'domain', 'host'):
|
|
return self._jid[1] or ''
|
|
elif name in ('full', 'jid'):
|
|
return _format_jid(*self._jid)
|
|
elif name == 'bare':
|
|
return _format_jid(self._jid[0], self._jid[1])
|
|
elif name == '_jid':
|
|
return getattr(super(JID, self), '_jid')
|
|
else:
|
|
return None
|
|
|
|
def __str__(self):
|
|
"""Use the full JID as the string value."""
|
|
return _format_jid(*self._jid)
|
|
|
|
def __repr__(self):
|
|
"""Use the full JID as the representation."""
|
|
return self.__str__()
|
|
|
|
|
|
class JID(object):
|
|
|
|
"""
|
|
A representation of a Jabber ID, or JID.
|
|
|
|
Each JID may have three components: a user, a domain, and an optional
|
|
resource. For example: user@domain/resource
|
|
|
|
When a resource is not used, the JID is called a bare JID.
|
|
The JID is a full JID otherwise.
|
|
|
|
**JID Properties:**
|
|
:jid: Alias for ``full``.
|
|
:full: The string value of the full JID.
|
|
:bare: The string value of the bare JID.
|
|
:user: The username portion of the JID.
|
|
:username: Alias for ``user``.
|
|
:local: Alias for ``user``.
|
|
:node: Alias for ``user``.
|
|
:domain: The domain name portion of the JID.
|
|
:server: Alias for ``domain``.
|
|
:host: Alias for ``domain``.
|
|
:resource: The resource portion of the JID.
|
|
|
|
:param string jid:
|
|
A string of the form ``'[user@]domain[/resource]'``.
|
|
:param string local:
|
|
Optional. Specify the local, or username, portion
|
|
of the JID. If provided, it will override the local
|
|
value provided by the `jid` parameter. The given
|
|
local value will also be escaped if necessary.
|
|
:param string domain:
|
|
Optional. Specify the domain of the JID. If
|
|
provided, it will override the domain given by
|
|
the `jid` parameter.
|
|
:param string resource:
|
|
Optional. Specify the resource value of the JID.
|
|
If provided, it will override the domain given
|
|
by the `jid` parameter.
|
|
|
|
:raises InvalidJID:
|
|
"""
|
|
|
|
# pylint: disable=W0212
|
|
def __init__(self, jid=None, **kwargs):
|
|
locked = kwargs.get('cache_lock', False)
|
|
in_local = kwargs.get('local', None)
|
|
in_domain = kwargs.get('domain', None)
|
|
in_resource = kwargs.get('resource', None)
|
|
parts = None
|
|
if in_local or in_domain or in_resource:
|
|
parts = (in_local, in_domain, in_resource)
|
|
|
|
# only check cache if there is a jid string, or parts, not if there
|
|
# are both
|
|
self._jid = None
|
|
key = None
|
|
if (jid is not None) and (parts is None):
|
|
if isinstance(jid, JID):
|
|
# it's already good to go, and there are no additions
|
|
self._jid = jid._jid
|
|
return
|
|
key = jid
|
|
self._jid, locked = JID_CACHE.get(jid, (None, locked))
|
|
elif jid is None and parts is not None:
|
|
key = parts
|
|
self._jid, locked = JID_CACHE.get(parts, (None, locked))
|
|
if not self._jid:
|
|
if not jid:
|
|
parsed_jid = (None, None, None)
|
|
elif not isinstance(jid, JID):
|
|
parsed_jid = _parse_jid(jid)
|
|
else:
|
|
parsed_jid = jid._jid
|
|
|
|
local, domain, resource = parsed_jid
|
|
|
|
if 'local' in kwargs:
|
|
local = _escape_node(in_local)
|
|
if 'domain' in kwargs:
|
|
domain = _validate_domain(in_domain)
|
|
if 'resource' in kwargs:
|
|
resource = _validate_resource(in_resource)
|
|
|
|
self._jid = (local, domain, resource)
|
|
if key:
|
|
_cache(key, self._jid, locked)
|
|
|
|
def unescape(self):
|
|
"""Return an unescaped JID object.
|
|
|
|
Using an unescaped JID is preferred for displaying JIDs
|
|
to humans, and they should NOT be used for any other
|
|
purposes than for presentation.
|
|
|
|
:return: :class:`UnescapedJID`
|
|
|
|
.. versionadded:: 1.1.10
|
|
"""
|
|
return UnescapedJID(_unescape_node(self._jid[0]),
|
|
self._jid[1],
|
|
self._jid[2])
|
|
|
|
def regenerate(self):
|
|
"""No-op
|
|
|
|
.. deprecated:: 1.1.10
|
|
"""
|
|
pass
|
|
|
|
def reset(self, data):
|
|
"""Start fresh from a new JID string.
|
|
|
|
:param string data: A string of the form ``'[user@]domain[/resource]'``.
|
|
|
|
.. deprecated:: 1.1.10
|
|
"""
|
|
self._jid = JID(data)._jid
|
|
|
|
@property
|
|
def resource(self):
|
|
return self._jid[2] or ''
|
|
|
|
@property
|
|
def user(self):
|
|
return self._jid[0] or ''
|
|
|
|
@property
|
|
def local(self):
|
|
return self._jid[0] or ''
|
|
|
|
@property
|
|
def node(self):
|
|
return self._jid[0] or ''
|
|
|
|
@property
|
|
def username(self):
|
|
return self._jid[0] or ''
|
|
|
|
@property
|
|
def bare(self):
|
|
return _format_jid(self._jid[0], self._jid[1])
|
|
|
|
@property
|
|
def server(self):
|
|
return self._jid[1] or ''
|
|
|
|
@property
|
|
def domain(self):
|
|
return self._jid[1] or ''
|
|
|
|
@property
|
|
def host(self):
|
|
return self._jid[1] or ''
|
|
|
|
@property
|
|
def full(self):
|
|
return _format_jid(*self._jid)
|
|
|
|
@property
|
|
def jid(self):
|
|
return _format_jid(*self._jid)
|
|
|
|
@property
|
|
def bare(self):
|
|
return _format_jid(self._jid[0], self._jid[1])
|
|
|
|
|
|
@resource.setter
|
|
def resource(self, value):
|
|
self._jid = JID(self, resource=value)._jid
|
|
|
|
@user.setter
|
|
def user(self, value):
|
|
self._jid = JID(self, local=value)._jid
|
|
|
|
@username.setter
|
|
def username(self, value):
|
|
self._jid = JID(self, local=value)._jid
|
|
|
|
@local.setter
|
|
def local(self, value):
|
|
self._jid = JID(self, local=value)._jid
|
|
|
|
@node.setter
|
|
def node(self, value):
|
|
self._jid = JID(self, local=value)._jid
|
|
|
|
@server.setter
|
|
def server(self, value):
|
|
self._jid = JID(self, domain=value)._jid
|
|
|
|
@domain.setter
|
|
def domain(self, value):
|
|
self._jid = JID(self, domain=value)._jid
|
|
|
|
@host.setter
|
|
def host(self, value):
|
|
self._jid = JID(self, domain=value)._jid
|
|
|
|
@full.setter
|
|
def full(self, value):
|
|
self._jid = JID(value)._jid
|
|
|
|
@jid.setter
|
|
def jid(self, value):
|
|
self._jid = JID(value)._jid
|
|
|
|
@bare.setter
|
|
def bare(self, value):
|
|
parsed = JID(value)._jid
|
|
self._jid = (parsed[0], parsed[1], self._jid[2])
|
|
|
|
|
|
def __str__(self):
|
|
"""Use the full JID as the string value."""
|
|
return _format_jid(*self._jid)
|
|
|
|
def __repr__(self):
|
|
"""Use the full JID as the representation."""
|
|
return self.__str__()
|
|
|
|
# pylint: disable=W0212
|
|
def __eq__(self, other):
|
|
"""Two JIDs are equal if they have the same full JID value."""
|
|
if isinstance(other, UnescapedJID):
|
|
return False
|
|
|
|
other = JID(other)
|
|
return self._jid == other._jid
|
|
|
|
# pylint: disable=W0212
|
|
def __ne__(self, other):
|
|
"""Two JIDs are considered unequal if they are not equal."""
|
|
return not self == other
|
|
|
|
def __hash__(self):
|
|
"""Hash a JID based on the string version of its full JID."""
|
|
return hash(self.__str__())
|
|
|
|
def __copy__(self):
|
|
"""Generate a duplicate JID."""
|
|
return JID(self)
|
|
|
|
def __deepcopy__(self, memo):
|
|
"""Generate a duplicate JID."""
|
|
return JID(deepcopy(str(self), memo))
|