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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Crossbar.io Technologies GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
import txaio
from twisted.internet import reactor
from autobahn.twisted.websocket import WebSocketServerFactory, \
WebSocketServerProtocol, \
listenWS
from autobahn.websocket.types import ConnectionDeny
class BaseService:
"""
Simple base for our services.
"""
def __init__(self, proto):
self.proto = proto
self.is_closed = False
def onOpen(self):
pass
def onClose(self, wasClean, code, reason):
pass
def onMessage(self, payload, isBinary):
pass
class Echo1Service(BaseService):
"""
Awesome Echo Service 1.
"""
def onMessage(self, payload, isBinary):
if not isBinary:
msg = "Echo 1 - {}".format(payload.decode('utf8'))
print(msg)
self.proto.sendMessage(msg.encode('utf8'))
class Echo2Service(BaseService):
"""
Awesome Echo Service 2.
"""
def onMessage(self, payload, isBinary):
if not isBinary:
msg = "Echo 2 - {}".format(payload.decode('utf8'))
print(msg)
self.proto.sendMessage(msg.encode('utf8'))
class ServiceServerProtocol(WebSocketServerProtocol):
SERVICEMAP = {'/echo1': Echo1Service,
'/echo2': Echo2Service}
def __init__(self):
self.service = None
self.is_closed = txaio.create_future()
def onConnect(self, request):
# request has all the information from the initial
# WebSocket opening handshake ..
print(request.peer)
print(request.headers)
print(request.host)
print(request.path)
print(request.params)
print(request.version)
print(request.origin)
print(request.protocols)
print(request.extensions)
# We map to services based on path component of the URL the
# WebSocket client requested. This is just an example. We could
# use other information from request, such has HTTP headers,
# WebSocket subprotocol, WebSocket origin etc etc
##
if request.path in self.SERVICEMAP:
cls = self.SERVICEMAP[request.path]
self.service = cls(self)
else:
err = "No service under %s" % request.path
print(err)
raise ConnectionDeny(404, unicode(err))
def onOpen(self):
if self.service:
self.service.onOpen()
def onMessage(self, payload, isBinary):
if self.service:
self.service.onMessage(payload, isBinary)
def onClose(self, wasClean, code, reason):
if self.service:
self.service.onClose(wasClean, code, reason)
if __name__ == '__main__':
factory = WebSocketServerFactory("ws://127.0.0.1:9000")
factory.protocol = ServiceServerProtocol
listenWS(factory)
reactor.run()
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