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"""
SleekXMPP: The Sleek XMPP Library
Copyright (C) 2011 Nathanael C. Fritz
This file is part of SleekXMPP.
See the file LICENSE for copying permission.
"""
import logging
import socket
import zlib
from sleekxmpp.thirdparty.suelta.util import bytes
from sleekxmpp.stanza import StreamFeatures
from sleekxmpp.xmlstream import RestartStream, register_stanza_plugin, ElementBase, StanzaBase
from sleekxmpp.xmlstream.matcher import *
from sleekxmpp.xmlstream.handler import *
from sleekxmpp.plugins import BasePlugin, register_plugin
log = logging.getLogger(__name__)
class Compression(ElementBase):
name = 'compression'
namespace = 'http://jabber.org/features/compress'
interfaces = set(('methods',))
plugin_attrib = 'compression'
plugin_tag_map = {}
plugin_attrib_map = {}
def get_methods(self):
methods = []
for method in self.xml.findall('{%s}method' % self.namespace):
methods.append(method.text)
return methods
class Compress(StanzaBase):
name = 'compress'
namespace = 'http://jabber.org/protocol/compress'
interfaces = set(('method',))
sub_interfaces = interfaces
plugin_attrib = 'compress'
plugin_tag_map = {}
plugin_attrib_map = {}
def setup(self, xml):
StanzaBase.setup(self, xml)
self.xml.tag = self.tag_name()
class Compressed(StanzaBase):
name = 'compressed'
namespace = 'http://jabber.org/protocol/compress'
interfaces = set()
plugin_tag_map = {}
plugin_attrib_map = {}
def setup(self, xml):
StanzaBase.setup(self, xml)
self.xml.tag = self.tag_name()
class ZlibSocket(object):
def __init__(self, socketobj):
self.__socket = socketobj
self.compressor = zlib.compressobj()
self.decompressor = zlib.decompressobj(zlib.MAX_WBITS)
def __getattr__(self, name):
return getattr(self.__socket, name)
def send(self, data):
sentlen = len(data)
data = self.compressor.compress(data)
data += self.compressor.flush(zlib.Z_SYNC_FLUSH)
log.debug(b'>>> (compressed)' + (data.encode("hex")))
#return self.__socket.send(data)
sentactuallen = self.__socket.send(data)
assert(sentactuallen == len(data))
return sentlen
def recv(self, *args, **kwargs):
data = self.__socket.recv(*args, **kwargs)
log.debug(b'<<< (compressed)' + data.encode("hex"))
return self.decompressor.decompress(self.decompressor.unconsumed_tail + data)
class XEP_0138(BasePlugin):
"""
XEP-0138: Compression
"""
name = "xep_0138"
description = "XEP-0138: Compression"
dependencies = set(["xep_0030"])
def plugin_init(self):
self.xep = '0138'
self.description = 'Stream Compression (Generic)'
self.compression_methods = {'zlib': True}
register_stanza_plugin(StreamFeatures, Compression)
self.xmpp.register_stanza(Compress)
self.xmpp.register_stanza(Compressed)
self.xmpp.register_handler(
Callback('Compressed',
StanzaPath('compressed'),
self._handle_compressed,
instream=True))
self.xmpp.register_feature('compression',
self._handle_compression,
restart=True,
order=self.config.get('order', 5))
def register_compression_method(self, name, handler):
self.compression_methods[name] = handler
def _handle_compression(self, features):
for method in features['compression']['methods']:
if method in self.compression_methods:
log.info('Attempting to use %s compression' % method)
c = Compress(self.xmpp)
c['method'] = method
c.send(now=True)
return True
return False
def _handle_compressed(self, stanza):
self.xmpp.features.add('compression')
log.debug('Stream Compressed!')
compressed_socket = ZlibSocket(self.xmpp.socket)
self.xmpp.set_socket(compressed_socket)
raise RestartStream()
def _handle_failure(self, stanza):
pass
xep_0138 = XEP_0138
register_plugin(XEP_0138)
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