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client-server.py
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client-server.py
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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 json
import time
from aiohttp import web
from autobahn.asyncio.websocket import WebSocketClientProtocol, \
WebSocketClientFactory
# identify/translate
# {
# 'type': 'client'
# 'from': self.peer
# 'to' : 'bjjj-javascript'
# 'msg' : {'key': 'value'}
# }
class MyClientProtocol(WebSocketClientProtocol):
def __init__(self, *args, **kwargs):
super(MyClientProtocol, self).__init__(*args, **kwargs)
self.task_result = {}
def postMsg(self, data):
self.sendMessage(json.dumps(data).encode("utf-8"))
def translate(self, peer, msg):
self.task_result = {}
data = {}
data['type'] = 'client'
data['from'] = peer
data['to'] = 'bjjj-javascript'
data['msg'] = msg
self.postMsg(data)
def onConnect(self, response):
print("Server connected: {0}".format(response.peer))
def onOpen(self):
print("WebSocket connection open.")
self.factory.client = self
def keepAlive():
self.sendMessage(b"\x00\x01\x03\x04", isBinary=True)
self.factory.loop.call_later(1, keepAlive)
# start sending messages every second ..
keepAlive()
def onMessage(self, payload, isBinary):
if isBinary:
# print("Binary message received: {0} bytes".format(len(payload)))
pass
else:
# print("Text message received: {0}".format(payload.decode('utf8')))
# json
try:
data = json.loads(payload.decode('utf8'))
self.task_result = data
except:
pass
def onClose(self, wasClean, code, reason):
print("WebSocket connection closed: {0}".format(reason))
self.factory.client = None
class ProxyFactory(WebSocketClientFactory):
def __init__(self, *args, **kwargs):
super(ProxyFactory, self).__init__(*args, **kwargs)
self.client = None
if __name__ == '__main__':
try:
import asyncio
except ImportError:
# Trollius >= 0.3 was renamed
import trollius as asyncio
factory = ProxyFactory(u"ws://127.0.0.1:9000")
factory.protocol = MyClientProtocol
loop = asyncio.get_event_loop()
coro = loop.create_connection(factory, '127.0.0.1', 9000)
loop.run_until_complete(coro)
# loop.run_forever()
async def hello(request):
return web.Response(text="Hello, world")
async def post_handler(request):
# proxy request to websocket client
client = factory.client;
if client:
msg = await request.json()
# msg = {'imageId': '09AD1D5877FE4383ACF222B143050FDB' + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) }
client.translate(client.peer, msg)
while True:
await asyncio.sleep(0.1)
if client.task_result:
break
print("client task result {0}".format(json.dumps(client.task_result)))
return web.json_response(client.task_result.get('msg'))
return web.json_response({'rescode': '500'})
app = web.Application()
app.router.add_get('/', hello)
app.router.add_post('/post', post_handler)
web.run_app(app, loop=loop)
# web.run_app insteadof loop.run_forever()
loop.close()