PubNub Getting started with PubNub
Remarks
This is an simple, yet thorough, example of initializing PubNub, subscribing to a channel and publishing to that channel.
- Once you init PUBNUB, you can subscribe to a channel.
- The
connectcallback indicates that subscription to the channel was successful, so we call ourpubfunction which performs apublishto the channel we just subscribed to. - This published message will be sent to the PubNub network which will send the message to all active subscribers. In this case, it is just us so we will receive that message in our
messagecallback where we are displaying the various attributes of the received message to our browser's Console.
In a real world use case, you would update your web page UI to display the received message.
Versions
| Version | Release Date |
|---|---|
| 3.15.x | 2016-04-01 |
Publish on Subscribe Success (connect)
This example show how to subscribe, and once that is successful, publishing a message to that channel. It also demonstrates the full set of parameters that can be included in the subscribe 's message callback function.
pubnub = PUBNUB({
publish_key : 'your_pub_key',
subscribe_key : 'your_sub_key'
});
pubnub.subscribe({
channel : "channel-1",
message : function (message, envelope, channelOrGroup, time, channel) {
console.log(
"Message Received." + "\n" +
"Channel or Group: " + JSON.stringify(channelOrGroup) + "\n" +
"Channel: " + JSON.stringify(channel) + "\n" +
"Message: " + JSON.stringify(message) + "\n" +
"Time: " + time + "\n" +
"Raw Envelope: " + JSON.stringify(envelope)
)},
connect: pub,
disconnect: function(m) {console.log("DISCONNECT: " + m)},
reconnect: function(m) {console.log("RECONNECT: " + m)},
error: function(m) {console.log("ERROR: " + m)}
});
function pub() {
pubnub.publish({
channel : "channel-1",
message : {"msg": "I'm Puuumped!"},
callback: function(m) {console.log("Publish SUCCESS: " + m)},
error: function(m) {console.log("Publish ERROR: " + m)}
})
};
