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###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) typedef int 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 asyncio
import json
from autobahn.asyncio.websocket import WebSocketServerProtocol, \
WebSocketServerFactory
class SlowSquareServerProtocol(WebSocketServerProtocol):
async def slowsquare(self, x):
if x > 5:
raise Exception("number too large")
else:
await asyncio.sleep(1)
return x * x
async def onMessage(self, payload, isBinary):
if not isBinary:
x = json.loads(payload.decode('utf8'))
try:
res = await self.slowsquare(x)
except Exception as e:
self.sendClose(1000, "Exception raised: {0}".format(e))
else:
self.sendMessage(json.dumps(res).encode('utf8'))
if __name__ == '__main__':
factory = WebSocketServerFactory("ws://127.0.0.1:9000")
factory.protocol = SlowSquareServerProtocol
loop = asyncio.get_event_loop()
coro = loop.create_server(factory, '127.0.0.1', 9000)
server = loop.run_until_complete(coro)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
finally:
server.close()
loop.close()
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