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Socket Io Chat Homework

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After configuring the pubnub server, it is great to be able to map the messages that are sent between clients with a pubnub API key. PubNub uses standard HTTP messages and a JSON payload so each published message can be processed and can be retrieved by any HTTP API client. This is particularly helpful if you are using a third-party application to handle message delivery like you are here. But you have to use the BETA version of the PubNub JSON API to handle message handling.

One-to-Many is a Pub/Sub or pub/unsub method where many publishers can send multiple messages to a single subscriber or many subscribers. In the above example we are simulating the presence of many users typing, but each user can send more than one message. This can be useful for multiple participants to talk amongst themselves, i.e. most companies or any type of group activity where multiple participants need to collaborate. notifications before publishing to subscribers. socket io chat homework You can also easily implement reactive applications using pubnub that react to data. By subscribing to changes in a channel, you can be notified of any new asset creation or updates in your channel.

As stated above, each PubNub application key is billed separately. So if you create three PubNub apps using different keys, you will want to have different dedicated APIs keys to each app. If you mix and match different API keys, you can only retrieve data from a subset of your clients across all applications. So if you use a key in one app, it will effectively block others.

Back to connecting the two use cases. There are four parts to this story. HTTP REST API - The first two parts give a basic understanding of how the Internet works. The third part will look at a socket server that talks to the RPi camera driver. d2c66b5586

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