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import asyncio
import json
import os
import sys
import aiohttp_cors as aiohttp_cors
from aiohttp import web
from pubnub import utils
from pubnub.callbacks import SubscribeCallback
from pubnub.enums import PNOperationType, PNStatusCategory
from pubnub.pubnub_asyncio import PubNubAsyncio
d = os.path.dirname
PUBNUB_ROOT = d(d(d(os.path.dirname(os.path.abspath(__file__)))))
APP_ROOT = d(os.path.abspath(__file__))
sys.path.append(PUBNUB_ROOT)
from pubnub.exceptions import PubNubException
from pubnub.pnconfiguration import PNConfiguration
pnconf = PNConfiguration()
pnconf.subscribe_key = "sub-c-33f55052-190b-11e6-bfbc-02ee2ddab7fe"
pnconf.publish_key = "pub-c-739aa0fc-3ed5-472b-af26-aca1b333ec52"
pnconf.uuid = "pubnub-demo-api-python-backend"
DEFAULT_CHANNEL = "pubnub_demo_api_python_channel"
EVENTS_CHANNEL = "pubnub_demo_api_python_events"
APP_KEY = utils.uuid()
loop = asyncio.get_event_loop()
pubnub = PubNubAsyncio(pnconf)
def publish_sync():
return _not_implemented_error({"error": "Sync publish not implemented"})
def app_key_handler():
return _ok({"app_key": APP_KEY})
def list_channels_handler():
return _ok({"subscribed_channels": pubnub.get_subscribed_channels()})
def add_channel_handler(request):
channel = request.GET["channel"]
if channel is None:
return _internal_server_error({"error": "Channel missing"})
try:
pubnub.subscribe().channels(channel).execute()
return _ok({"subscribed_channels": pubnub.get_subscribed_channels()})
except PubNubException as e:
return _internal_server_error({"message": str(e)})
def remove_channel_handler(request):
channel = request.GET["channel"]
if channel is None:
return _internal_server_error({"error": "Channel missing"})
try:
pubnub.unsubscribe().channels(channel).execute()
return _ok({"subscribed_channels": pubnub.get_subscribed_channels()})
except PubNubException as e:
return _internal_server_error({"message": str(e)})
def _ok(body):
return _prepare_response(body)
def _not_implemented_error(body):
return web.HTTPNotImplemented(
body=json.dumps(body).encode("utf-8"), content_type="application/json"
)
def _internal_server_error(body):
return web.HTTPInternalServerError(
body=json.dumps(body).encode("utf-8"), content_type="application/json"
)
def _prepare_response(body):
return web.Response(
body=json.dumps(body).encode("utf-8"), content_type="application/json"
)
def init_events_transmitter():
"""
Method transmits status events to the specific channel
:return:
"""
class StatusListener(SubscribeCallback):
def status(self, pubnub, status):
event = "unknown"
if (
status.operation == PNOperationType.PNSubscribeOperation
and status.category == PNStatusCategory.PNConnectedCategory
):
event = "Connect"
elif (
status.operation == PNOperationType.PNUnsubscribeOperation
and status.category == PNStatusCategory.PNAcknowledgmentCategory
):
event = "Unsubscribe"
asyncio.ensure_future(
pubnub.publish()
.channel("status-" + APP_KEY)
.message({"event": event})
.future(),
loop=loop,
)
def presence(self, pubnub, presence):
pass
def message(self, pubnub, message):
pass
listener = StatusListener()
pubnub.add_listener(listener)
async def make_app(loop):
app = web.Application()
# (r"/listen", ListenHandler),
cors = aiohttp_cors.setup(
app,
defaults={
"*": aiohttp_cors.ResourceOptions(
allow_credentials=True,
expose_headers="*",
allow_headers="*",
)
},
)
app.router.add_route("GET", "/app_key", app_key_handler)
app.router.add_route("GET", "/subscription/add", add_channel_handler)
app.router.add_route("GET", "/subscription/remove", remove_channel_handler)
app.router.add_route("GET", "/subscription/list", list_channels_handler)
app.router.add_route("GET", "/publish/sync", publish_sync)
app.router.add_route("GET", "/publish/async", publish_sync)
app.router.add_route("GET", "/publish/async2", publish_sync)
for route in list(app.router.routes()):
cors.add(route)
srv = await loop.create_server(app.make_handler(), "0.0.0.0", 8080)
return srv
if __name__ == "__main__":
init_events_transmitter()
loop.run_until_complete(make_app(loop))
loop.run_forever()
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