/usr/lib/python2.7/dist-packages/gwebsockets/server.py is in python-gwebsockets 0.4-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | # Copyright 2013 Daniel Narvaez
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from StringIO import StringIO
from collections import deque
from gi.repository import Gio
from gi.repository import GLib
from gi.repository import GObject
from gwebsockets import protocol
logger = logging.getLogger("gwebsockets")
class MessageBuffer():
def __init__(self):
self._data = b""
self.available = 0
def append(self, data):
self._data = self._data + data
self.available = len(self._data)
def read(self, size):
result = self._data[:size]
self._data = self._data[size:]
self.available = len(self._data)
return result
class Message():
TYPE_TEXT = 0
TYPE_BINARY = 1
def __init__(self, message_type, data):
self.message_type = message_type
self.data = data
class Session(GObject.GObject):
message_received = GObject.Signal("message-received", arg_types=(object,))
def __init__(self, connection):
GObject.GObject.__init__(self)
self._connection = connection
self._request = StringIO()
self._message = MessageBuffer()
self._parse_g = None
self._ready = False
self._send_queue = deque()
self._sending = False
def _response_write_cb(self, stream, result, user_data):
stream.write_bytes_finish(result)
self._ready = True
def _do_handshake(self):
self._request.seek(0)
response = protocol.make_handshake(self._request)
stream = self._connection.get_output_stream()
stream.write_bytes_async(GLib.Bytes.new(response.encode("utf-8")),
GLib.PRIORITY_DEFAULT,
None, self._response_write_cb, None)
def read_data(self):
stream = self._connection.get_input_stream()
stream.read_bytes_async(8192, GLib.PRIORITY_DEFAULT, None,
self._read_data_cb, None)
def _read_data_cb(self, stream, result, user_data):
data = stream.read_bytes_finish(result).get_data()
logger.debug("Got data, length %d" % len(data))
if not data:
return
if self._ready:
self._message.append(data)
while self._message.available > 0:
if self._parse_g is None:
self._parse_g = protocol.parse_message(self._message)
parsed_message = self._parse_g.next()
if parsed_message:
self._parse_g = None
received = None
if parsed_message.tp == protocol.OPCODE_TEXT:
received = Message(Message.TYPE_TEXT,
parsed_message.data)
logger.debug("Received text message %s" %
received.data)
elif parsed_message.tp == protocol.OPCODE_BINARY:
received = Message(Message.TYPE_BINARY,
parsed_message.data)
logger.debug("Received binary message, length %s" %
len(received.data))
if received:
self.message_received.emit(received)
else:
break
else:
self._request.write(data)
if data.endswith("\r\n\r\n"):
self._do_handshake()
self.read_data()
def _message_write_cb(self, stream, result, callback):
written = stream.write_bytes_finish(result)
if callback:
callback(written)
self._sending = False
self._send_from_queue()
def send_message(self, message, callback=None, binary=False):
if binary:
logger.debug("Sending binary message, length %s" % len(message))
else:
logger.debug("Sending text message %s" % message)
protocol_message = protocol.make_message(message, binary)
self._send_queue.append((protocol_message, callback))
self._send_from_queue()
def _send_from_queue(self):
if self._sending:
return
if not self._send_queue:
return
stream = self._connection.get_output_stream()
message, callback = self._send_queue.popleft()
stream.write_bytes_async(GLib.Bytes.new(message),
GLib.PRIORITY_DEFAULT,
None, self._message_write_cb, callback)
self._sending = True
class Server(GObject.GObject):
session_started = GObject.Signal("session-started", arg_types=(object,))
def _incoming_connection_cb(self, service, connection, user_data):
session = Session(connection)
self.session_started.emit(session)
session.read_data()
def start(self):
service = Gio.SocketService()
service.connect("incoming", self._incoming_connection_cb)
return service.add_any_inet_port(None)
if __name__ == "__main__":
def message_received_cb(session, message):
session.send_message(message.data)
def session_started_cb(server, session):
session.connect("message-received", message_received_cb)
server = Server()
server.connect("session-started", session_started_cb)
port = server.start()
print "Listening on port %d" % port
main_loop = GLib.MainLoop()
main_loop.run()
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