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authorekini <eugene@dementiev.eu>2012-07-23 15:39:07 +0700
committerekini <eugene@dementiev.eu>2012-07-23 15:39:07 +0700
commitea3d39b50e303db191cefad194a65b48d178e3ef (patch)
treeabf1f9a41dc0979b36fbd1251b277afb4c477fe5 /sleekxmpp/plugins/xep_0138.py
parent78f03253983779673beaf3c102ae315707a49d2c (diff)
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added xep-0138 support (compression)
Diffstat (limited to 'sleekxmpp/plugins/xep_0138.py')
-rw-r--r--sleekxmpp/plugins/xep_0138.py148
1 files changed, 148 insertions, 0 deletions
diff --git a/sleekxmpp/plugins/xep_0138.py b/sleekxmpp/plugins/xep_0138.py
new file mode 100644
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--- /dev/null
+++ b/sleekxmpp/plugins/xep_0138.py
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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)