314 lines
9.9 KiB
Python
314 lines
9.9 KiB
Python
import json
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import requests
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import time
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from .exceptions import PacketError
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__version__ = '0.6.1'
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TRANSPORTS = []
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class EngineIO(object):
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_engineIO_protocol = 3
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_engineIO_request_index = 0
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def __init__(
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self,
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host, port=None, Namespace=None,
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wait_for_connection=True, transports=TRANSPORTS,
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resource='engine.io', **kw):
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self._url = 'http://%s:%s/%s/' % (host, port, resource)
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self._session = requests.Session()
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print self._url
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response = self._session.get(self._url, params={
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'EIO': self._engineIO_protocol,
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'transport': 'polling',
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't': self._get_timestamp(),
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})
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print response.url
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engineIO_packets = _decode_content(response.content)
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print engineIO_packets
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engineIO_packet_type, engineIO_packet_data = engineIO_packets[0]
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assert engineIO_packet_type == 0
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engineIO_packet_json = json.loads(engineIO_packet_data)
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print engineIO_packet_json
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# engineIO_packet_json['pingInterval']
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# engineIO_packet_json['pingTimeout']
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# engineIO_packet_json['upgrades']
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self._session_id = engineIO_packet_json['sid']
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def wait(self):
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while True:
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self._process_packets()
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def _process_packets(self):
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for engineIO_packet in self._recv_packet():
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self._process_packet(engineIO_packet)
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def _process_packet(self, packet):
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engineIO_packet_type, engineIO_packet_data = packet
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print 'engineIO_packet_type = %s' % engineIO_packet_type
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engineIO_packet_data_parsed = _parse_engineIO_data(
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engineIO_packet_data)
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# Launch callbacks
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namespace = self.get_namespace()
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try:
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delegate = {
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0: self._on_open,
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1: self._on_close,
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2: self._on_ping,
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3: self._on_pong,
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4: self._on_message,
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5: self._on_upgrade,
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6: self._on_noop,
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}[engineIO_packet_type]
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except KeyError:
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raise PacketError(
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'unexpected engine.io packet type (%s)' % engineIO_packet_type)
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delegate(engineIO_packet_data_parsed, namespace._find_packet_callback)
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return engineIO_packet_data
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def define(self, Namespace):
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self._namespace = namespace = Namespace(self)
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return namespace
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def get_namespace(self):
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try:
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return self._namespace
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except AttributeError:
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raise PacketError('undefined engine.io namespace')
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def _on_open(self, data_parsed, find_packet_callback):
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pass
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def _on_close(self, data_parsed, find_packet_callback):
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pass
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def _on_ping(self, data_parsed, find_packet_callback):
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pass
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def _on_pong(self, data_parsed, find_packet_callback):
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pass
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def _on_message(self, data_parsed, find_packet_callback):
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pass
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def _on_upgrade(self, data_parsed, find_packet_callback):
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pass
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def _on_noop(self, data_parsed, find_packet_callback):
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pass
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def _get_timestamp(self):
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timestamp = '%s-%s' % (
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int(time.time() * 1000), self._engineIO_request_index)
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self._engineIO_request_index += 1
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return timestamp
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def _message(self, engineIO_packet_data):
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engineIO_packet_type = 4
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response = self._session.post(self._url, params={
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'EIO': self._engineIO_protocol,
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'transport': 'polling',
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't': self._get_timestamp(),
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'sid': self._session_id,
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}, data=_encode_content([
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(engineIO_packet_type, engineIO_packet_data),
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]), headers={
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'content-type': 'application/octet-stream',
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})
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engineIO_packets = _decode_content(response.content)
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for engineIO_packet_type, engineIO_packet_data in engineIO_packets:
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socketIO_packet_type = int(engineIO_packet_data[0])
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socketIO_packet_data = engineIO_packet_data[1:]
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print 'engineIO_packet_type = %s' % engineIO_packet_type
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print 'socketIO_packet_type = %s' % socketIO_packet_type
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print 'socketIO_packet_data = %s' % socketIO_packet_data
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def _ping(self):
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engineIO_packet_type = 2
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engineIO_packet_data = ''
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response = self._session.post(self._url, params={
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'EIO': self._engineIO_protocol,
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'transport': 'polling',
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't': self._get_timestamp(),
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'sid': self._session_id,
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}, data=_encode_content([
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(engineIO_packet_type, engineIO_packet_data),
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]), headers={
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'content-type': 'application/octet-stream',
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})
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engineIO_packets = _decode_content(response.content)
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for engineIO_packet_type, engineIO_packet_data in engineIO_packets:
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socketIO_packet_type = int(engineIO_packet_data[0])
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socketIO_packet_data = engineIO_packet_data[1:]
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print 'engineIO_packet_type = %s' % engineIO_packet_type
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print 'socketIO_packet_type = %s' % socketIO_packet_type
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print 'socketIO_packet_data = %s' % socketIO_packet_data
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def _recv_packet(self):
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response = self._session.get(self._url, params={
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'EIO': self._engineIO_protocol,
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'transport': 'polling',
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't': self._get_timestamp(),
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'sid': self._session_id,
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})
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for engineIO_packet in _decode_content(response.content):
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yield engineIO_packet
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class SocketIO(EngineIO):
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def __init__(
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self,
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host, port=None, Namespace=None,
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wait_for_connection=True, transports=TRANSPORTS,
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resource='socket.io', **kw):
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super(SocketIO, self).__init__(
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host, port, Namespace,
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wait_for_connection, transports,
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resource, **kw)
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def define(self, Namespace, path=''):
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if path:
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self._connect(path)
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self._namespace_by_path[path] = namespace = Namespace(self, path)
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return namespace
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def get_namespace(self, path=''):
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try:
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return self._namespace_by_path[path]
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except KeyError:
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raise PacketError('undefined socket.io namespace (%s)' % path)
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def emit(self, event, *args, **kw):
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socketIO_packet_type = 2
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socketIO_packet_data = json.dumps([event])
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self._message(str(socketIO_packet_type) + socketIO_packet_data)
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def on(self, event, callback):
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pass
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def _process_packet(self, packet):
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engineIO_packet_data = super(SocketIO, self)._process_packet(packet)
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socketIO_packet_type = int(engineIO_packet_data[0])
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socketIO_packet_data = engineIO_packet_data[1:]
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print 'socketIO_packet_type = %s' % socketIO_packet_type
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socketIO_packet_data_parsed = _parse_socketIO_data(
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socketIO_packet_data)
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# Launch callbacks
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namespace = self.get_namespace()
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try:
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delegate = {
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0: self._on_connect,
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1: self._on_disconnect,
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2: self._on_event,
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3: self._on_ack,
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4: self._on_error,
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5: self._on_binary_event,
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6: self._on_binary_ack,
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}[socketIO_packet_type]
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except KeyError:
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raise PacketError(
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'unexpected socket.io packet type (%s)' % socketIO_packet_type)
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delegate(socketIO_packet_data_parsed, namespace._find_packet_callback)
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return socketIO_packet_data
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def _on_connect(self, data_parsed, find_packet_callback):
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pass
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def _on_disconnect(self, data_parsed, find_packet_callback):
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pass
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def _on_event(self, data_parsed, find_packet_callback):
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pass
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def _on_ack(self, data_parsed, find_packet_callback):
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pass
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def _on_error(self, data_parsed, find_packet_callback):
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pass
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def _on_binary_event(self, data_parsed, find_packet_callback):
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pass
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def _on_binary_ack(self, data_parsed, find_packet_callback):
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pass
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class BaseNamespace(object):
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pass
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class LoggingNamespace(BaseNamespace):
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pass
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def find_callback(args, kw=None):
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pass
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def _decode_content(content):
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print content
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packets = []
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content_index = 0
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content_length = len(content)
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while content_index < content_length:
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try:
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content_index, packet_length = _read_packet_length(
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content, content_index)
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except IndexError:
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break
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content_index, packet_string = _read_packet_string(
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content, content_index, packet_length)
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packet_type = int(packet_string[0])
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packet_data = packet_string[1:]
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packets.append((packet_type, packet_data))
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return packets
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def _encode_content(packets):
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parts = []
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for packet_type, packet_data in packets:
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packet_string = str(packet_type) + str(packet_data)
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parts.append(_make_packet_header(packet_string) + packet_string)
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return ''.join(parts)
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def _read_packet_length(content, content_index):
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while ord(content[content_index]) != 0:
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content_index += 1
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content_index += 1
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packet_length_string = ''
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while ord(content[content_index]) != 255:
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packet_length_string += str(ord(content[content_index]))
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content_index += 1
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return content_index, int(packet_length_string)
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def _read_packet_string(content, content_index, packet_length):
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while ord(content[content_index]) == 255:
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content_index += 1
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packet_string = content[content_index:content_index + packet_length]
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return content_index + packet_length, packet_string
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def _make_packet_header(packet_string):
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length_string = str(len(packet_string))
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header_digits = [0]
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for i in xrange(len(length_string)):
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header_digits.append(ord(length_string[i]) - 48)
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header_digits.append(255)
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return ''.join(chr(x) for x in header_digits)
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def _parse_engineIO_data():
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pass
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def _parse_socketIO_data():
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pass
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