cfwebsocket

Includes the required JavaScript files in your CFM template and creates a global JavaScript reference to the WebSocket Object on the client-side.

<cfwebsocket name="" onMessage="">

cfwebsocket(name="", onMessage="");

This tag requires Adobe ColdFusion 10 and up. Not supported on Lucee, etc.

Attribute Reference

name string
Required

onMessage string
Required

The JavaScript function that is called when the WebSocket receives a message from the server.

onOpen string

The JavaScript function that is called when the WebSocket establishes a connection.

onClose string

The JavaScript function that is called when the WebSocket closes a connection.

onError string

The JavaScript function that is called if there is an error while performing an action over the WebSocket connection.

usecfAuth boolean
Default: `false`

If set to true (default), users need not authenticate for WebSocket connection (provided they have already logged in to the application). This is the default value. If false, users have to specify the credentials for the WebSocket connection.

subscribeTo string

Comma-separated list of channels to subscribe to. You can specify any or all channels set in your this.wschannels Application settings

secure boolean

If true, the web socket communication will happen over SSL. CF 11+

Compatibility

ColdFusion:

Version 10+ SSL is only available on CF11+

Links more information about cfwebsocket

ColdFusion Summit Presentation Code and Slides ( 2014 / 2015 ) by Giancarlo Gomez - Slides and Code from the "Realtime with Websockets" presentation at ColdFusion Summit 2014 & 2015. Includes AdvancedSocket which aims to help handling connectivity issues from the client side when using ColdFusion WebSocket solution. As well as a drop in test suite within the console folder which was re-skinned and updated from Adobe's original example.
HTML5 WebSockets and ColdFusion by Awdhesh Kumar - Original post from 2012 by Awdhesh Kumar regarding using WebSockets in ColdFusion 10.
Using WebSocket with ColdFusion 11 by Awdhesh Kumar - Follow up post by Awdhesh Kumar in 2014 regarding enhancements to WebSockets in ColdFusion 11.
Using WebSocket to broadcast messages - Adobe - Examples available on ColdFusion documentation

Examples
Sample code using the cfwebsocket tag

Script Syntax (CF11+)

cfwebsocket(name="ws", onMessage="handleMessage");

Tag Syntax

This example creates a JavaScript WebSocket object named ws. When a message is pushed, the client runs the handleMessage JavaScript function. This example also uses the subscribeTo attribute so it will automatically subscribe to the channel chat.

<cfwebsocket name="ws" onMessage="handleMessage" subscribeTo="chat" />
<script>
  function handleMessage(message)  {
    // Output message object to console
    console.log(message);
  }
</script>

Sub-channels

Sub-channels are created dynamically and are referenced by dot notation. When a message is broadcasted to a channel all its sub-channels receive the message as well. This only goes from top to bottom and not the other way around. In this example we create a JavaScript object called ws and subscribe to the room-general subchannel of the main chat channel.

<cfwebsocket name="ws" onMessage="handleMessage" subscribeTo="chat.room-general" />