Using WebSocket Subscriptions without Queues

Using WebSocket Subscriptions without Queues

Learn about the WebSocket Protocol and how to use WebSocket subscriptions without queues. What are Websockets? The WebSocket Protocol describes a full-duplex web channel which is frequently used when facing real-time data requirements. It offers a way of establishing an active connection (socket) between the server and the client for low overhead two-way communication, together with well-defined ways for communicating supported languages and fatal errors.

In this post, you can learn about the WebSocket Protocol and how to use WebSocket subscriptions without queues.

We live in a connected world and the necessity for real-time has never been greater. There are two main players in the real-time realm: Server-Sent Events (SSE) and WebSockets.

The two are quite similar in terms of allowing the server to push data to the client without having the client poll the server for updates.

However, the main difference is that WebSockets allow the client to do the same thing (send data to the server), while SSE does not. In the SSE world, you issue one request for which the server can reply multiple times.

Both methods have their pros and cons, and, depending on your needs, you might choose one over the other. In this article, we’ll focus on WebSockets.

What are Websockets?

The WebSocket Protocol describes a full-duplex web channel which is frequently used when facing real-time data requirements. It offers a way of establishing an active connection (socket) between the server and the client for low overhead two-way communication, together with well-defined ways for communicating supported languages and fatal errors.

It is widely used for multiplayer games, live finances, online chat, and in many places where real-time collaboration takes place.

You start by sending a protocol update request through HTTP, the server evaluates the request, checks the supported subprotocols (in-socket communication languages), and concludes the upgrade with an 101: Switching Protocols response.

After a successful update, the communication occurring through this active TCP connection follows the WebSocket Protocol. At this point, both the server and the client can send each other messages whenever they wish for the whole duration of the socket connection.

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