2.8 KiB
2.8 KiB
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PubNub Real-time Data Network
Twisted Migration
Import
# Pre 3.5:
from pubnub import Pubnub
# New in 3.5+
from pubnub import PubnubTwisted as Pubnub
Init
# Pre 3.5:
pubnub = Pubnub(
"demo", ## PUBLISH_KEY
"demo", ## SUBSCRIBE_KEY
False ## SSL_ON?
)
# New in 3.5+
pubnub = Pubnub(publish_key="demo", subscribe_key="demo", ssl_on=False)
PUBLISH
channel = 'hello_world'
message = 'Hello World !!!'
# Pre 3.5:
def callback(messages):
print(messages)
pubnub.publish( {
'channel' : channel,
'message' : message,
'callback' : callback
})
# New in 3.5+
def callback(message):
print(message)
pubnub.publish(channel, message, callback=callback, error=callback)
SUBSCRIBE
# Listen for Messages
channel = 'hello_world'
# Pre 3.5:
def connected() :
print('CONNECTED')
def message_received(message):
print(message)
pubnub.subscribe({
'channel' : channel,
'connect' : connected,
'callback' : message_received
})
# New in 3.5+
def callback(message, channel):
print(message)
def error(message):
print("ERROR : " + str(message))
def connect(message):
print("CONNECTED")
def reconnect(message):
print("RECONNECTED")
def disconnect(message):
print("DISCONNECTED")
pubnub.subscribe(channel, callback=callback, error=callback,
connect=connect, reconnect=reconnect, disconnect=disconnect)
Unsubscribe
Once subscribed, you can easily, gracefully, unsubscribe:
# Pre 3.5:
pubnub.unsubscribe({
'channel' : 'hello_world'
})
# New in 3.5+
pubnub.unsubscribe(channel='hello_world')
PRESENCE
# Pre 3.5:
#
# New in 3.5+
# Listen for Presence Event Messages
channel = 'hello_world'
def callback(message, channel):
print(message)
def error(message):
print("ERROR : " + str(message))
pubnub.presence(channel, callback=callback, error=callback)
HERE_NOW
channel = 'hello_world'
# Pre 3.5:
def callback(messages):
print(messages)
pubnub.here_now( {
'channel' : channel,
'callback' : callback
})
# New in 3.5+
# Get info on who is here right now!
def callback(message):
print(message)
pubnub.here_now(channel, callback=callback, error=callback)
HISTORY
channel = 'hello_world'
# Pre 3.5:
def history_complete(messages):
print(messages)
pubnub.history( {
'channel' : channel,
'limit' : 2,
'callback' : history_complete
})
# New in 3.5+
def callback(message):
print(message)
pubnub.history(channel, count=2, callback=callback, error=callback)
IO Event Loop
# Pre 3.5:
reactor.run()
# New in 3.5+
pubnub.start()