Socket.IO
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| Original author(s) | Guillermo Rauch |
|---|---|
| Stable release | 1.3.6 / July 15, 2015 |
| Development status | Active |
| Written in | JavaScript |
| Operating system | Cross-platform |
| Type | Event-driven networking |
| License | MIT License[1] |
| Website | socket |
Socket.IO is a JavaScript library for realtime web applications. It enables realtime, bi-directional communication between web clients and servers. It has two parts: a client-side library that runs in the browser, and a server-side library for node.js. Both components have a nearly identical API. Like node.js, it is event-driven.
Socket.IO primarily uses the WebSocket protocol with polling as a fallback option,[2] while providing the same interface. Although it can be used as simply a wrapper for WebSocket, it provides many more features, including broadcasting to multiple sockets, storing data associated with each client, and asynchronous I/O.
It can be installed with the npm tool.[3][4]
Overview
Socket.IO provides the ability to implement real-time analytics, binary streaming, instant messaging, and document collaboration.[5] Notable users include Microsoft Office, Yammer, and Zendesk.[6]
Socket.IO handles the connection transparently. It will automatically upgrade to WebSocket if possible. This requires the programmer to only have Socket.IO knowledge.
Socket.IO is not a WebSocket library with fallback options to other realtime protocols. It is a custom realtime transport protocol implementation on top of other realtime protocols. Its protocol negotiation parts cause a client supporting standard WebSocket to not be able to contact a Socket.IO server. And a Socket.IO implementing client cannot talk to a non-Socket.IO based WebSocket or Long Polling Comet server. Therefore, Socket.IO requires using the Socket.IO libraries on both client and server side.
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ socket.io
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
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