# Websockets

Build interactive HTML 5 application using Dataloy Websockets.

It is possible to open a Websocket to get notified when there are changes in Dataloy data model.

The concept is very similar to Webhooks, it is possible open a socket to be notified for Creation, Update and Deletion of any of object type of the data model.

The endpoint syntax is:

* **ws\://{url}/ws/rest/WebSocketObjectSubscription/{objectType}/{eventType}/{key}/{token}**

The JSON pushed will have the same structure of the one pushed by Webhooks.

It is possible to customize the JSON sent from the Server to the Client using [*Adjust Number of Fields to be Returned from a Request*](https://dataloy-cloud.atlassian.net/wiki/spaces/VMSINT/pages/923414751/Adjust+Number+of+Fields+to+be+Returned+from+a+Request)*.*

*(The JSON fields can be sent through the open Websocket by the Client to the Server)*

(To get back to the standard fields list a empty JSON ( {} ) can be sent from the client to the server)

It is possible to open a Websocket linked to an Alert Script to be notified when the script is fired and returns true.

The endpoint to use is:

* **ws\://{url}/ws/rest/WebSocketAlertScript/{scriptCode}/{token}**

Passing the script code.