How Can I Implement Server Push with the Comet Design Pattern in JavaScript?

Server Push with Javascript: Comet Design Pattern

Server push is a technique that allows a server to send data to a client without the client explicitly requesting it. This is useful for applications where real-time data updates are required, such as chat or stock market updates.

One design pattern for implementing server push is Comet. Comet uses a long-polling strategy, in which the client sends a request to the server and then waits for a response. The server can then push data to the client whenever it becomes available.

jQuery Comet Implementations

There are several jQuery plugins that provide Comet functionality. One popular plugin is [jQuery CometD](https://github.com/jhaynie/jquery.cometd), which implements the Bayeux protocol. Another option is [jQuery Long Poll](https://github.com/hiddentao/jquery.longpoll), which uses a simple long-polling strategy.

Documentation on Comet

There is a limited amount of documentation available on the Comet design pattern specifically. However, there are many resources available on long-polling and server push in general. Some useful resources include:

• [Ajax Push and Long Poll](https://www.html5rocks.com/en/tutorials/eventsource/push/)
• [Long Polling explained](https://developer.mozilla.org/en-US/docs/Glossary/Long_polling)

Custom Comet Plugin

As mentioned in the provided answer, the user Till wrote a custom jQuery Comet plugin that implements the Bayeux protocol. This plugin is available on its [Google code page](https://code.google.com/archive/p/jquery-bayeux/).

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