WebSocketIRIS.js

Docker Support added

This is now the version compatible to IRIS using IRIS Native API for Node.js
which is significantly different from the interface availaible for Caché.

Node / JavaScript have wide reputation to work as WebSocket client.
By using the IRIS adapter it becomes easy to control and to consume the results as a
Client for WebSocket Servers and to collect the replies in IRIS.

I used node-v10.15.1-x64.msi and intersystems-iris-native package

How it works

You provide a Global for input in namespace USER (default)

set ^ZSockIn(0)=6
set ^ZSockIn(1)="Hello"
set ^ZSockIn(2)="World !" set ^ZSockIn(3)="Robert"
set ^ZSockIn(4)="is waiting"
set ^ZSockIn(5)="for replies" set ^ZSockIn(6)="exit"

The server is controlled by ^ZSocketRun from IRIS

set ^ZSocketRun(0)="wss://ws.postman-echo.com/raw" ;echo server
set ^ZSocketRun=1 ; => send to echo server
; -1 => stop server and exit
; 0 => wait for action

and from echo server you get back a Global as output
written by Node.js using the Native API for Node.js

zwrite ^ZSockOut
^ZSocketOut="wss://ws.postman-echo.com/"
^ZZSockOut(0)=6
^ZSockOut(1)="Hello"
^ZSockOut(2)="World !"
^ZSockOut(3)="Robert"
^ZSockOut(4)="is waiting"
^ZSockOut(5)="for replies"
^ZSockOut(6)="exit"

Local installation and operation

The WebSocket Service is started from OS command line.
You can follow the progress in console output

C:\Program Files\nodejs\cache>node WebSocketIRIS.js

Comment in DC

Docker support

Prerequisites

Make sure you have git and Docker desktop installed.

Installation

Clone/git pull the repo into any local directory
git clone https://github.com/rcemper/WebSocketIRIS.js.git

Open the terminal in this directory, build and run the container:

docker-compose up -d
Next open a IRIS session in namespace USER and prepare the Globals for testing
a test program ZSocket.MAC is in subdirectory src of download directory

Now activate your Node.js client
Have the external IP address and the SuperServerPort ready !
default: localhost:1972 is just a placeholder

docker-compose exec wsock nodejs WebSocketIRIS.js :