What Socket Is Io?

Socket.io is a JavaScript library that enables real-time, bi-directional and event driven communication between the client and server. Socket.io consists of two similar APIs i.e. A node. js server API.

What port does Socket.IO use?

If you specify only the host which is different from the current host, it defaults to port 80 if the protocol is HTTP. If the protocol is HTTPS, then the port defaults to 443 .

What is Socket.IO and why it is used?

Socket.IO is a library that enables real-time, bidirectional and event-based communication between the browser and the server . It consists of: a Node. js server: Source | API. a Javascript client library for the browser (which can be also run from Node.

What is Socket.IO and how it works?

The bidirectional channel between the Socket .IO server (Node. js) and the Socket.IO client (browser, Node. js, or another programming language) is established with a WebSocket connection whenever possible, and will use HTTP long-polling as fallback.

Why is Socket.IO used?

Socket.IO allows bi-directional communication between client and server . Bi-directional communications are enabled when a client has Socket.IO in the browser, and a server has also integrated the Socket.IO package. ... Engine.IO is used for the server implementation and Engine. IO-client is used for the client.

Is Socket.IO TCP or UDP?

From a browser client, socket.io uses either the http or the webSocket transport. Both http and webSocket are TCP connections, not UDP connections. So the browser client socket.io does not use UDP – it uses TCP.

Is Socket.IO secure?

Socket.IO is easy to use and great for real-time communication between apps, but correctly configuring a cloud server to use a secure SSL-encrypted connection without performance degradation can be tricky.

Does Facebook use Socket?

It tries to use socket directly , and have fallbacks to other solutions when sockets are not available. On server side, create a server using NodeJS (example here). The client will subscribe to this channel (observer) created with the server.

Is Socket.IO asynchronous?

No . A function will never be interrupted by an event. The event loop will check the queue of event triggered functions to run only after it is finished whatever it is currently doing.

Is Socket.IO a framework?

Socket.IO is a real-time application framework based on Node. js , which has a wide range of applications including instant messaging, notification and message push, real-time analysis and other scenarios. ... Socket.IO supports both websockets and polling.

How much does Socket.IO cost?

Is learning Socket.IO hard?

The Learning Process

It was shockingly easy to build the application — for some reason websockets have always been very intimidating to me, and I thought they would be much harder to use! After that tutorial I felt pretty comfortable building something myself.

How many users can Socket.IO handle?

Because Websockets are built on top of TCP, my understanding is that unless ports are shared between connections you are going to be bound by the 64K port limit. But I’ve also seen reports of 512K connections using Gretty.

Is Socket.IO client side?

Socket.IO is composed of two parts: A server that integrates with (or mounts on) the Node. JS HTTP Server socket.io. A client library that loads on the browser side socket .

Is Socket.IO still relevant?

Conclusion. I think Socket.io is a very useful piece of technology and is incredibly relevant today in spite of the popular view that widespread support for WebSockets makes it redundant. I would recommend that it be used for highly interactive applications. Its namespacing in particular is its strongest point.

What is Socket.IO protocol?

Socket.IO is a transport protocol that enables real-time bidirectional event-based communication between clients (typically, though not always, web browsers) and a server. The official implementations of the client and server components are written in JavaScript.