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2017-08-08
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WebSockets

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Introduction

WebSocket is protocol, which enables two-way communication between a client and server:

The goal WebSocket is to provide a mechanism for browser-based applications that need two-way communication with servers that does not rely on opening multiple HTTP connections. (RFC 6455)

WebSocket works over HTTP protocol.

Syntax

  • new WebSocket(url)
  • ws.binaryType /* delivery type of received message: "arraybuffer" or "blob" */
  • ws.close()
  • ws.send(data)
  • ws.onmessage = function(message) { /* ... */ }
  • ws.onopen = function() { /* ... */ }
  • ws.onerror = function() { /* ... */ }
  • ws.onclose = function() { /* ... */ }

Parameters

ParameterDetails
urlThe server url supporting this web socket connection.
dataThe content to send to the host.
messageThe message received from the host.

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