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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.
#
###############################################################################
from os import environ
import sys
import decimal
from twisted.internet.defer import inlineCallbacks
from autobahn import wamp
from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner
class Calculator(ApplicationSession):
@inlineCallbacks
def onJoin(self, details):
self.clear()
yield self.register(self)
print("Ok, calculator procedures registered!")
@wamp.register(u'com.example.calculator.clear')
def clear(self, arg=None):
self.op = None
self.current = decimal.Decimal(0)
return str(self.current)
@wamp.register(u'com.example.calculator.calc')
def calc(self, op, num):
num = decimal.Decimal(num)
if self.op:
if self.op == "+":
self.current += num
elif self.op == "-":
self.current -= num
elif self.op == "*":
self.current *= num
elif self.op == "/":
self.current /= num
self.op = op
else:
self.op = op
self.current = num
res = str(self.current)
if op == "=":
self.clear()
return res
if __name__ == '__main__':
decimal.getcontext().prec = 20
import sys
import argparse
# parse command line arguments
parser = argparse.ArgumentParser()
parser.add_argument("--web", type=int, default=8080,
help='Web port to use for embedded Web server. Use 0 to disable.')
parser.add_argument("--router", type=str, default=None,
help='If given, connect to this WAMP router. Else run an embedded router on 9000.')
args = parser.parse_args()
from twisted.python import log
log.startLogging(sys.stdout)
# run WAMP application component
from autobahn.twisted.wamp import ApplicationRunner
runner = ApplicationRunner(
environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/ws"),
u"crossbardemo",
)
runner.run(Calculator)
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